0001624794-25-000103 | 10-Q | XBRL Viewer

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DERIVATIVE INSTRUMENTS AND HEDGE ACCOUNTING (Details) - Interest Rate Swap - USD ($) $ in Millions	1 Months Ended
	Sep. 30, 2024	Sep. 30, 2025	Feb. 07, 2023
Derivative [Line Items]
Amount of hedged item		$ 100.0	$ 100.0
Derivative, fixed interest rate (in percent)			3.85%
Payment for hedge	$ 0.4
Notional amount	$ 0.0	$ 0.0

ORGANIZATION AND OPERATIONS AND SUMMARY OF ACCOUNTING POLICIES (Policies)	6 Months Ended
	Sep. 30, 2025
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements included in this Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025 (“Quarterly Report”), include all revenues, costs, assets and liabilities directly attributable to CSW and have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The consolidated financial statements are for us and our consolidated subsidiaries, each of which is a wholly-owned subsidiary, except our non-controlling 50% investment in a variable interest entity (“VIE”) for which we have determined that we are the primary beneficiary and therefore have consolidated into our financial statements. All significant intercompany transactions have been eliminated in consolidation. The consolidated financial statements reflect all adjustments that are, in the opinion of management, necessary to present a fair statement of CSW’s financial position as of September 30, 2025, and the results of operations for the six month periods ended September 30, 2025 and 2024. All adjustments are of a normal, recurring nature. The year-end balance sheet data was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in CSW’s Annual Report on Form 10-K for the fiscal year ended March 31, 2025 (the “Annual Report”).
Consolidation	Basis of Presentation The consolidated financial statements included in this Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025 (“Quarterly Report”), include all revenues, costs, assets and liabilities directly attributable to CSW and have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The consolidated financial statements are for us and our consolidated subsidiaries, each of which is a wholly-owned subsidiary, except our non-controlling 50% investment in a variable interest entity (“VIE”) for which we have determined that we are the primary beneficiary and therefore have consolidated into our financial statements. All significant intercompany transactions have been eliminated in consolidation. The consolidated financial statements reflect all adjustments that are, in the opinion of management, necessary to present a fair statement of CSW’s financial position as of September 30, 2025, and the results of operations for the six month periods ended September 30, 2025 and 2024. All adjustments are of a normal, recurring nature. The year-end balance sheet data was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in CSW’s Annual Report on Form 10-K for the fiscal year ended March 31, 2025 (the “Annual Report”).
Accounting Developments	Accounting Developments Pronouncements not yet implemented In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which provides qualitative and quantitative updates to the rate reconciliation and income taxes paid disclosures, among others, in order to enhance the transparency of income tax disclosures, including consistent categories and greater disaggregation of information in the rate reconciliation and disaggregation by jurisdiction of income taxes paid. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. This ASU should be applied prospectively; however, retrospective application is also permitted. This ASU will be effective for our Form 10-K for fiscal 2026. We are currently evaluating the impact this ASU may have on our financial statement disclosures. In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income (Topic 220): Expense Disaggregation Disclosures. Additionally, in January 2025, the FASB issued ASU 2025-01 to clarify the effective date of ASU 2024-03. This ASU provides guidance to expand disclosures related to the disaggregation of income statement expenses. Also, this ASU requires, in the notes to the financial statements, disclosure of specified information about certain costs and expenses which includes purchases of inventory, employee compensation, depreciation, and intangible asset amortization included in each relevant expense caption. ASU 2025-01 is effective for fiscal years beginning after December 15, 2026, and interim periods within annual reporting periods beginning after December 15, 2027, on a retrospective or prospective basis, with early adoption permitted. This ASU will be effective for our Form 10-K for fiscal 2028 and our Form 10-Q for the first quarter of 2029. We are currently evaluating the impact this ASU may have on our financial statement disclosures.

CONSOLIDATION OF VARIABLE INTEREST ENTITIES AND REDEEMABLE NONCONTROLLING INTEREST

6 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

CONSOLIDATION OF VARIABLE INTEREST ENTITIES AND REDEEMABLE NONCONTROLLING INTEREST

CONSOLIDATION OF VARIABLE INTEREST ENTITY AND REDEEMABLE NONCONTROLLING INTEREST

Whitmore Joint Venture

On April 1, 2021, Whitmore Manufacturing, LLC (“Whitmore”), a wholly-owned subsidiary of CSW, completed the formation of the joint venture (the “Whitmore JV”) with Pennzoil-Quaker State Company dba SOPUS Products, a wholly-owned subsidiary of Shell Oil Company that comprises Shell’s U.S. lubricants business.

The Whitmore JV is deemed to be a VIE as the equity investors at risk, as a group, lack the characteristics of a controlling financial interest. The major factor that led to the conclusion that the Company is the primary beneficiary of this VIE is that Whitmore has the power to direct the most significant activities due to its ability to direct the manufacturing decisions of the Whitmore JV. Whitmore JV’s total net assets are presented below (in thousands):


	September 30, 2025		March 31, 2025
Cash	$	3,879	$	9,591
Accounts receivable, net	8,435		8,407
Inventories, net	4,480		4,823
Prepaid expenses and other current assets	370		254
Property, plant and equipment, net	13,709		13,452
Intangible assets, net	4,454		4,859
Other assets	845		597
Total assets	$	36,172	$	41,983

Accounts payable	$	4,779	$	7,755
Accrued and other current liabilities	1,740		1,605
Other long-term liabilities	624		414
Total liabilities	$	7,143	$	9,774

During the three and six months ended September 30, 2025, the Whitmore JV generated net income of $0.3 million and $0.8 million, respectively.

The Whitmore JV’s LLC Agreement contains a put option that gives either member the right to sell its 50% equity interest in the Whitmore JV to the other member at a dollar amount equivalent to 90% of the initiating member's equity interest determined based on the fair market value of the Whitmore JV’s net assets. This put option can be exercised, at either member’s discretion, by providing written notice to the other member during the month of July 2024 and every two years thereafter. No put option was provided in July 2024. This redeemable noncontrolling interest is recorded at the higher of the redemption value or carrying value each reporting period. Changes in redeemable noncontrolling interest for the six-month period ended September 30, 2025 were as follows (in thousands):


	September 30, 2025		September 30, 2024
Balance at beginning of the year	$	20,187	$	19,355

Net income attributable to redeemable noncontrolling interest	403		828

Distributions to redeemable noncontrolling interest shareholder	(2,000)		—

Ending balance	$	18,590	$	20,183

LEASES - Schedule of Components of Lease Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Components of Operating Lease Expense
Operating lease expense	$ 4,011	$ 3,310	$ 7,950	$ 6,347
Short-term lease expense	61	231	288	450
Total operating lease expense	$ 4,072	$ 3,541	$ 8,238	$ 6,797

Cover - shares	6 Months Ended
Cover - shares	Sep. 30, 2025	Oct. 27, 2025
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2025
Document Transition Report	false
Entity File Number	001-37454
Entity Registrant Name	CSW INDUSTRIALS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-2266942
Entity Address, Address Line One	5420 Lyndon B. Johnson Freeway, Suite 500
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75240
City Area Code	214
Local Phone Number	884-3777
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	CSW
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		16,686,708
Amendment Flag	false
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001624794
Current Fiscal Year End Date	--03-31

ORGANIZATION AND OPERATIONS AND SUMMARY OF ACCOUNTING POLICIES (Details)	6 Months Ended
	Sep. 30, 2025 segment country brand
Accounting Policies [Abstract]
Number of reportable segments \| segment	3
Number of countries \| country	100
Highly respected industrial brands (more than) \| brand	100

LEASES - Additional Information (Details)	Sep. 30, 2025
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	22 years

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share [Abstract]
Net income	$ 40,814		$ 36,621		$ 81,984	$ 75,472
Less: Net income attributable to redeemable noncontrolling interest	(158)		(570)		(403)	(828)
Net income attributable to CSW Industrials, Inc.	$ 40,656	$ 40,925	$ 36,051	$ 38,591	$ 81,581	$ 74,644
Weighted average shares:
Common stock (in shares)	16,700		15,765		16,710	15,599
Participating securities (in shares)	85		101		86	102
Denominator for basic earnings per common share (in shares)	16,785		15,866		16,796	15,701
Potentially dilutive securities (in shares)	57		75		56	69
Denominator for diluted earnings per common share (in shares)	16,842		15,941		16,852	15,770
Net income per share attributable to CSW Industrials, Inc.:
Basic (in USD per share)	$ 2.42		$ 2.27		$ 4.86	$ 4.75
Diluted (in USD per share)	$ 2.41		$ 2.26		$ 4.84	$ 4.73

SEGMENTS (Tables)

6 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

Schedule of Segments

The following is a summary of the financial information of our reporting segments reconciled to the amounts reported in the consolidated financial statements (in thousands).

Three Months Ended September 30, 2025:


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
Revenues, net to external customers	$	206,278	$	38,764	$	31,909	$	276,951	$	—	$	276,951
Intersegment revenue	2,190		42		5		2,237		(2,237)		—
Cost of revenues	114,424		25,845		19,734		160,003		(2,237)		157,766
Selling, general, and administrative expenses	40,669		7,868		7,349		55,886		6,519		62,405
Operating income	53,375		5,093		4,831		63,299		(6,519)		56,780
Depreciation & amortization	12,555		1,347		440		14,342		49		14,391
Capital expenditures	2,398		409		273		3,080		—		3,080

Three Months Ended September 30, 2024:


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
Revenues, net to external customers	$	156,764	$	38,489	$	32,673	$	227,926	$	—	$	227,926
Intersegment revenue	2,070		45		—		2,115		(2,115)		—
Cost of revenues	82,494		24,530		19,116		126,140		(2,115)		124,025
Selling, general, and administrative expenses	30,086		8,185		7,475		45,746		6,606		52,352
Operating income	46,254		5,819		6,082		58,155		(6,606)		51,549
Depreciation & amortization	8,002		1,409		494		9,905		45		9,950
Capital expenditures	4,550		647		206		5,403		83		5,486

Six Months Ended September 30, 2025


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
Revenues, net to external customers	$	401,253	$	75,540	$	63,804	$	540,597	$	—	$	540,597
Intersegment revenue	3,955		73		5		4,033		(4,033)		—
Cost of revenues	220,890		49,466		39,647		310,003		(4,033)		305,970
Selling, general, and administrative expenses	78,185		15,811		15,332		109,328		13,643		122,971
Operating income	106,133		10,336		8,830		125,299		(13,643)		111,656
Depreciation & amortization	24,095		2,684		856		27,635		94		27,729
Capital expenditures	4,476		1,131		377		5,984		—		5,984

Six Months Ended September 30, 2024


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
Revenues, net to external customers	$	315,302	$	75,235	$	63,566	$	454,103	$	—	$	454,103
Intersegment revenue	3,950		91		—		4,041		(4,041)		—
Cost of revenues	163,802		46,064		36,956		246,822		(4,041)		242,781
Selling, general, and administrative expenses	59,312		16,294		14,802		90,408		14,304		104,712
Operating income	96,138		12,970		11,806		120,914		(14,304)		106,610
Depreciation & amortization	15,985		2,832		979		19,796		87		19,883
Capital expenditures	6,646		1,161		681		8,488		99		8,587

TOTAL ASSETS


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
September 30, 2025	$	1,272,563	$	143,642	$	85,274	$	1,501,479	$	16,474	$	1,517,953
March 31, 2025	941,087		145,663		81,347		1,168,097		210,968		1,379,065

SHAREHOLDERS' EQUITY - Additional Information (Details) - USD ($)			1 Months Ended	3 Months Ended					6 Months Ended
	Oct. 17, 2025	Dec. 16, 2022	Sep. 30, 2024	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Nov. 18, 2024
Equity, Class of Treasury Stock [Line Items]
Shares sold in offering (in shares)			1,265,000
Offering price per share (in USD per share)			$ 285				$ 285			$ 285
Consideration received			$ 347,400,000
Shares withheld for tax withholding obligation (in shares)				0			0		14,966	14,283
Payment of tax withholding				$ 0			$ 0		$ 4,400,000	$ 3,300,000
Dividend declared (in USD per share)					$ 0.27	$ 0.24		$ 0.21
Dividends				$ 4,500,000			$ 3,300,000		$ 9,074,000	$ 6,523,000
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Dividend declared (in USD per share)	$ 0.27
2022 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase program authorized amount		$ 100,000,000
Share repurchase program term		2 years
Shares repurchased (in shares)							13,658			32,454
Shares repurchased, amount							$ 4,200,000			$ 8,900,000
2024 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase program authorized amount											$ 200,000,000
Shares repurchased (in shares)				72,911					88,450
Shares repurchased, amount				$ 18,300,000					$ 23,000,000

GOODWILL AND INTANGIBLE ASSETS

6 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

The changes in the carrying amount of goodwill as of September 30, 2025 and March 31, 2025 were as follows (in thousands):


	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total
Balance at March 31, 2025	$	230,880	$	9,437	$	23,775	$	264,092
Aspen Manufacturing acquisition	100,134		—		—		100,134
PF WaterWorks acquisition	619		—		—		619


Currency translation	45		144		274		463
Balance at September 30, 2025	$	331,678	$	9,581	$	24,049	$	365,308

The following table provides information about our intangible assets (in thousands, except years):


		September 30, 2025				March 31, 2025
	Weighted Avg Life (Years)	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Finite-lived intangible assets:
Patents	10	$	17,786	$	(10,751)	$	17,784	$	(10,189)
Customer lists and amortized trademarks	15	568,213		(145,190)		402,765		(127,551)
Non-compete agreements	6	1,000		(727)		1,000		(639)
Other	10	6,276		(3,392)		6,277		(3,141)
		$	593,275	$	(160,060)	$	427,826	$	(141,520)
Trade names and trademarks not being amortized:		$	93,623	$	—	$	71,604	$	—

Amortization expenses for the three and six months ended September 30, 2025 were $9.4 million and $18.0 million, respectively. Amortization expenses for the three and six months ended September 30, 2024 were $6.5 million and $11.9 million, respectively. The following table shows the estimated future amortization for intangible assets, as of September 30, 2025, for the remainder of the current fiscal year and the next four fiscal years ending March 31 (in thousands):


2026	$	19,157
2027	37,104
2028	36,712
2029	36,636
2030	36,570
Thereafter	267,036
Total	$	433,215

OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,109,828	$ 1,072,246	$ 650,158	$ 615,723	$ 1,072,246	$ 615,723
Adjustments for foreign currency translation	(1,252)	1,384	896	(825)	132	71
Balance at end of period	1,129,967	1,109,828	1,030,166	650,158	1,129,967	1,030,166
Interest rate swaps, unrealized gain, tax					0	153
Reclassification from AOCI, current period, tax					0	142
Currency translation adjustments:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(10,638)	(12,020)	(11,024)	(10,137)	(12,020)	(10,137)
Adjustments for foreign currency translation	(1,254)		2,068		128	1,181
Balance at end of period	(11,892)	(10,638)	(8,956)	(11,024)	(11,892)	(8,956)
Interest rate swaps:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	0	0	1,173	1,111	0	1,111
Adjustments for foreign currency translation	0		(1,173)		0	(1,111)
Unrealized gains (losses), net of taxes	0		(953)		0	(577)
Reclassification of losses (gains) included in interest expense, net of taxes	0		(220)		0	(534)
Balance at end of period	0	0	0	1,173	0	0
Interest rate swaps, unrealized gain, tax	0		253
Reclassification from AOCI, current period, tax	0		58
Defined benefit plans:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(105)	(107)	(100)	(100)	(107)	(100)
Balance at end of period	(103)	$ (105)	(99)	$ (100)	(103)	(99)
Defined benefit plans, Amortization of net gains, net of taxes
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassification of losses (gains) included in interest expense, net of taxes	2		1		4	1
Reclassification from AOCI, current period, tax	$ (1)		$ 0		$ (1)	$ 0

LEASES

6 Months Ended

Sep. 30, 2025

Leases [Abstract]

LEASES

We have operating leases for manufacturing facilities, offices, warehouses, vehicles and certain equipment. Our leases have remaining lease terms of 1 year to 22 years, some of which include escalation clauses and/or options to extend or terminate the leases. We do not currently have any financing lease arrangements.


	Three Months Ended September 30,				Six Months Ended September 30,
(in thousands)	2025		2024		2025		2024
Components of Operating Lease Expense






Operating lease expense (a)	$	4,011	$	3,310	$	7,950	$	6,347
Short-term lease expense	61		231		288		450
Total operating lease expense	$	4,072	$	3,541	$	8,238	$	6,797
(a) Included in cost of revenues and selling, general and administrative expenses


(in thousands)	September 30, 2025		March 31, 2025







Operating Lease Assets and Liabilities
Right-of-use assets, net (b)	$	68,292	$	62,061

Short-term lease liabilities (c)	$	12,312	$	11,244
Long-term lease liabilities (c)	63,144		58,120
Total operating lease liabilities	$	75,456	$	69,364
(b) Included in other assets
(c) Included in accrued and other current liabilities and other long-term liabilities


	Six Months Ended September 30,
(in thousands)	2025			2024
Supplemental Cash Flow
Cash paid for amounts included in the measurement of operating lease liabilities (d)	$	8,034		$	6,117
Right-of-use assets obtained in exchange for new operating lease liabilities	868			20,089
(d) Included in our Consolidated Statements of Cash Flows under operating activities in net income and accounts payable and other current liabilities

Other Information for Operating Leases
Weighted average remaining lease term (in years)	6.87			7.79
Weighted average discount rate	5.7		%	5.1		%


Maturities of operating lease liabilities were as follows (in thousands):
Year Ending March 31, 2026 (excluding the six months ended September 30, 2025)	$	8,216
2027	15,395
2028	14,087
2029	12,601
2030	11,035
Thereafter	31,294
Total lease liabilities	92,628
Less: Imputed interest	(17,172)
Present value of lease liabilities	$	75,456

ACQUISITIONS

6 Months Ended

Sep. 30, 2025

Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]

ACQUISITIONS

Aspen Manufacturing, LLC

On May 1, 2025, we acquired 100% of the equity interests of Aspen Manufacturing, LLC (“Aspen Manufacturing”), based in Humble, Texas, for an aggregate purchase price of $327.6 million (including $2.3 million cash acquired), comprised of cash consideration of $313.5 million and working capital adjustments of $11.8 million, including a $1.7 million payment made during the three months ended September 30, 2025. The cash consideration was funded with cash on hand and borrowings under our existing Revolving Credit Facility (as defined in Note 7). Aspen Manufacturing is one of the largest independent evaporator coil and air handler manufacturers for the HVAC/R industry and is recognized as a leader in product quality and indoor comfort. Aspen Manufacturing’s current product suite includes a vast range of high-quality residential and light commercial evaporator coils, blowers, and air handling units for single-family, multi-family, and manufactured homes.

The Aspen Manufacturing acquisition was accounted for as a business combination under FASB Accounting Standards Codification Topic 805, Business Combinations ("Topic 805"). Pursuant to Topic 805, the Company allocated the Aspen Manufacturing purchase price to tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date, May 1, 2025. The excess of the purchase price over those fair values was recorded to goodwill. The Company's evaluation of the facts and circumstances available as of May 1, 2025, to assign fair values to assets acquired and liabilities assumed, including income tax related amounts, is ongoing. The primary areas of preliminary purchase accounting price allocation subject to changes relate to the valuation of working capitals, income tax contingency and related indemnification asset and value of property, plant and equipment. We expect to finalize the purchase price allocation as soon as practicable, but no later than one year from the acquisition date. The following table summarizes the Company's best initial estimate of the aggregate fair value of the assets acquired and liabilities assumed at the date of acquisition (in thousands).


	Initial Estimated Fair Value		Measurement Period		Updated Estimated Fair Value
Cash	$	2,289	$	—	$	2,289
Accounts Receivable	15,253		(62)		15,191
Inventory	30,851		311		31,162

Other Current Assets	150		—		150
Property, Plant and Equipment	7,916		—		7,916
Trade Name (indefinite life)	22,000		—		22,000
Customer Lists (useful life of 15 years)	165,000		—		165,000
Right-Of-Use Assets	11,855		—		11,855
Long-Term Indemnity Asset	400		—		400
Other Long-Term Assets	—		1,789		1,789
Accounts Payable	(5,459)		—		(5,459)
Accrued and Other Current Liabilities	(8,943)		(57)		(9,000)
Lease Liabilities - Short-Term	(1,019)		—		(1,019)


Lease Liabilities - Long-Term	(10,836)		—		(10,836)
Contingency Reserve	(400)		—		(400)
Other Long-Term Liabilities	(3,600)		—		(3,600)
Estimated fair value of net assets acquired	225,457		1,981		227,438
Goodwill	100,421		(287)		100,134
Total Purchase Price	$	325,878	$	1,694	$	327,572

Goodwill of $100.1 million represents the excess of the purchase price over the fair value of the underlying tangible and intangible assets acquired and liabilities assumed. The acquisition goodwill represents the value expected to be obtained from expanding the Company’s product offerings more broadly across the HVAC/R end market. The goodwill recorded as part of this acquisition is included in the Contractor Solutions segment. The goodwill and all intangible assets are deductible and amortized over 15 years for income tax purposes.

Aspen Manufacturing generated net revenue of $84.5 million and net income before income taxes of $17.3 million for the period from the acquisition date to September 30, 2025. Aspen Manufacturing activity is currently included in our Contractor Solutions segment. During the year ended March 31, 2025, the Company incurred $1.1 million of transaction expenses in connection with the Aspen Manufacturing acquisition. During the three and six months ended September 30, 2025, the Company incurred $0.2 million and $0.4 million, respectively, of transaction expenses in connection with the Aspen Manufacturing acquisition. Transaction expenses are included in selling, general and administrative expenses in the Consolidated Statement of Operations under the Contractor Solutions segment.

Pursuant to Topic 805, unaudited supplemental proforma results of operations for the three and six months ended September 30, 2025 and 2024, as if the acquisition of Aspen Manufacturing had occurred on April 1, 2024, are presented below (in thousands, except per share amounts):


	Three Months Ended September 30,				Six Months Ended September 30,
	2025		2024		2025		2024
Revenues, net	$	276,951	$	265,843	$	551,040	$	527,058
Net income attributable to CSW Industrials, Inc.	41,362		38,434		84,625		78,503

Net income per share attributable to CSW Industrials, Inc.
Basic	$	2.46	$	2.42	$	5.04	$	5.00
Diluted	$	2.46	$	2.41	$	5.02	$	4.98

These proforma results do not present financial results that would have been realized had the acquisition occurred on April 1, 2024, nor are they intended to be a projection of future results. The unaudited proforma results include certain proforma adjustments to net income that were directly attributable to the acquisition, as if the acquisition had occurred on April 1, 2024, including the following:

•Additional amortization expense of $0.0 million and $0.9 million for the three and six months ended September 30, 2025, respectively, and $2.8 million and $5.5 million for the three and six months ended September 30, 2024, respectively, that would have been recognized as a result of the allocation of purchase consideration to customer lists subject to amortization;

•Reclassed amortization expense of $0.7 million and $1.5 million for the three and six months ended September 30, 2025 to the three and six months ended September 30, 2024, respectively, that would have been recognized as a result of the allocation of purchase consideration to acquisition inventory step-up;

•Additional depreciation expense of $0.0 million and $0.1 million for the three and six months ended September 30, 2025, respectively, and $0.2 million and $0.4 million for the three and six months ended September 30, 2024, respectively, that would have been recognized as a result of the fair value step-up of the property, plant and equipment;

•Excluded transactions expenses of $0.2 million and $0.4 million for the three and six months ended September 30, 2025, and additional $0.2 million and $1.5 million for the three and six months ended September 30, 2024, respectively, that would have been recognized;

•Estimated additional interest expense of $0.0 million and $0.6 million for the three and six months ended September 30, 2025, respectively, and $1.9 million and $3.8 million for the three and six months ended September 30, 2024, respectively, as a result of incurring additional borrowing; and

•Income tax expense (benefit) of the proforma adjustments, calculated using a blended statutory income tax rate of 25.0%, of $0.2 million and $(0.1) million for the three and six months ended September 30, 2025, respectively, and $1.5 million and $3.2 million for the three and six months ended September 30, 2024, respectively.

PF WaterWorks, L.P.

On November 4, 2024, we acquired the assets of PF WaterWorks, L.P. (“PF WaterWorks”), based in Houston, Texas for an aggregate purchase price of $45.8 million, comprised of cash considerations of $40.0 million, an estimated working capital true-up adjustment of $2.6 million and contingent considerations initially measured at $3.2 million based on PF WaterWorks meeting defined financial targets over a period of 3.2 years. The cash consideration was funded with cash on hand. PF WaterWorks offers innovative, eco-friendly drain management solutions that expand upon, and are complimentary to, our existing plumbing product portfolio. As of the acquisition date, the estimated fair value of the contingent consideration was classified as a long-term liability of $3.2 million, which was determined using an option pricing model simulation that determines an average projected payment value across numerous iterations. During the year ended March 31, 2025, we incurred $1.4 million in transaction expenses in connection with the PF WaterWorks acquisition, which were included in selling, general and administrative expenses in the Consolidated Statements of Operations under the Contractor Solutions segment. During the six months ended September 30, 2025, no transaction expenses were incurred in connection with the PF WaterWorks acquisition.

The PF WaterWorks acquisition was accounted for as a business combination under FASB Accounting Standards Codification Topic 805, Business Combinations (“Topic 805”). The excess of the purchase price over the preliminary fair value of the identifiable assets acquired and liabilities assumed was $10.9 million allocated to goodwill, which represents the value expected to be obtained from owning products that are expanding our existing plumbing offerings and provide additional drain management solutions to our customers. The preliminary allocation of the fair value of the net assets acquired comprises customer lists ($26.2 million), trade name ($3.1 million), patent ($0.6 million), accounts receivable ($1.5 million), inventory ($3.8 million), other current assets ($0.2 million), and other assets ($0.4 million), net of current liabilities ($0.7 million) and other liabilities ($0.1 million). Customer lists and patent are being amortized over 15 years and 5 years, respectively, while the trade name and goodwill are not being amortized. The Company’s evaluation of the facts and circumstances available as of November 4, 2024 to assign fair values to assets acquired is ongoing. The primary area of preliminary purchase price allocation subject to change relates to the valuation of working capital and property, plant and equipment. We expect to finalize the purchase price allocation as soon as practicable, but no later than one year from the acquisition date. Goodwill and all intangible assets are deductible and amortized over 15 years for income tax purposes. PF WaterWorks activity has been included in our Contractor Solutions segment since the acquisition date.

The disclosure of PF WaterWorks' post-acquisition revenue and net income is not practical due to integration activities since the acquisition date. No pro forma information has been provided due to immateriality.

PSP Products, Inc.

On August 1, 2024, we acquired the assets of PSP Products, Inc. (“PSP Products”), based in Manassas, Virginia for an aggregate purchase price of $51.3 million, comprised of cash consideration of $32.5 million, a working capital true-up adjustment of $7.0 million and contingent considerations initially measured at $11.8 million based on PSP Products meeting defined operational and financial targets over a period of 2.5 years. The cash consideration was funded with cash on hand and borrowings under our existing Revolving Credit Facility, as defined in Note 7. PSP Products offers a family of superior surge protection and load management products to our existing HVAC/R offerings. As of the acquisition date, the estimated fair value of the contingent consideration was classified as a long-term liability of $11.8 million, of which $4.8 million was determined using an option pricing model simulation that determines an average projected payment value across numerous iterations and $7.0 million was determined using a scenario-based analysis on forecasted future results. During the quarter ended March 31, 2025, we increased the fair value of the contingent consideration liability related to the PSP Products acquisition due to the better than expected performance and recognized a $2.1 million expense recorded in general and administrative expenses in the Consolidated Statements of Operations under the Contractor Solutions segment. During the year ended March 31, 2025, we incurred $0.5 million in transaction expenses in connection with the PSP Products acquisition, which were included in selling, general and administrative expenses in the Consolidated Statements of Operations under the Contractor Solutions segment. During the six months ended September 30, 2025, no transaction expenses were incurred in connection with the PSP Products acquisition.

The PSP Products acquisition was accounted for as a business combination under FASB Accounting Standards Codification Topic 805, Business Combinations (“Topic 805”). The excess of the purchase price over the preliminary fair value of the identifiable assets acquired and liabilities assumed was $7.3 million allocated to goodwill, which represents the value expected to be obtained from owning products that are complementary to our existing HVAC/R offerings and provide additional electrical offerings to our customers. The allocation of the fair value of the net assets acquired comprises customer lists ($30.0 million), trade name ($2.4 million), accounts receivable ($4.4 million), inventory ($8.9 million), other current asset ($0.3 million), equipment ($0.3 million) and other assets ($0.7 million), net of current liabilities ($2.7 million) and other liabilities ($0.3 million). Customer lists are being amortized over 15 years while the trade name and goodwill are not being amortized. During the three months ended September 30, 2025, the Company completed the evaluation of the facts and circumstances available as of August 1, 2024, to assign fair values to assets and liabilities acquired. Goodwill and all intangible assets are deductible and amortized over 15 years for income tax purposes. PSP Products activity has been included in our Contractor Solutions segment since the acquisition date.

The disclosure of PSP Product's post-acquisition revenue and net income is not practical due to integration activities since the acquisition date. No pro forma information has been provided due to immateriality.

- Definition

The entire disclosure for business combination.

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+ Details

OTHER COMPREHENSIVE INCOME (LOSS)

6 Months Ended

Sep. 30, 2025

Equity [Abstract]

OTHER COMPREHENSIVE INCOME (LOSS)

The following table provides an analysis of the changes in accumulated other comprehensive income (loss) (in thousands):


	Three Months Ended September 30,
	2025		2024
Currency translation adjustments:
Balance at beginning of period	$	(10,638)	$	(11,024)
Adjustments for foreign currency translation	(1,254)		2,068
Balance at end of period	$	(11,892)	$	(8,956)

Interest rate swaps:
Balance at beginning of period	$	—	$	1,173
Unrealized losses, net of taxes of $0 and $253, respectively (a)	—		(953)
Reclassification of losses included in interest expense, net, net of taxes of $0 and $58, respectively	—		(220)

Other comprehensive income	—		(1,173)
Balance at end of period	$	—	$	—

Defined benefit plans:
Balance at beginning of period	$	(105)	$	(100)
Amortization of net gains, net of taxes of $(1) and $0, respectively (b)	2		1


Balance at end of period	$	(103)	$	(99)


	Six Months Ended September 30,
	2025		2024
Currency translation adjustments:
Balance at beginning of period	$	(12,020)	$	(10,137)
Adjustments for foreign currency translation	128		1,181
Balance at end of period	$	(11,892)	$	(8,956)

Interest rate swaps:
Balance at beginning of period	$	—	$	1,111
Unrealized losses, net of taxes of $0 and $153, respectively	—		(577)
Reclassification of losses included in interest expense, net, net of taxes of $0 and $142, respectively	—		(534)
Other comprehensive income (loss)	—		(1,111)
Balance at end of period	$	—	$	—

Defined benefit plans:
Balance at beginning of period	$	(107)	$	(100)
Amortization of net losses, net of taxes of $(1) and $0, respectively (b)	4		1


Balance at end of period	$	(103)	$	(99)

(a) Unrealized gain (loss) is reclassified to earnings as underlying cash interest settlements are made or received. As discussed in Note 9, the interest rate swap was terminated in September 2024. As such, no gain or loss is expected to be recognized over the next twelve months.

(b) Amortization of actuarial gains (losses) out of accumulated comprehensive loss are included in the computation of net periodic pension expense.

SHARE-BASED COMPENSATION - Schedule of Share-Based Compensation (Details) - Restricted Stock - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 3,591	$ 3,145	$ 7,628	$ 6,891
Related income tax benefit	(898)	(786)	(1,907)	(1,723)
Net share-based compensation expense	$ 2,693	$ 2,359	$ 5,721	$ 5,168

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

OTHER COMPREHENSIVE INCOME (LOSS) (Tables)

6 Months Ended

Sep. 30, 2025

Equity [Abstract]

Schedule of Analysis of Changes in Accumulated Other Comprehensive Income (Loss)

The following table provides an analysis of the changes in accumulated other comprehensive income (loss) (in thousands):


	Three Months Ended September 30,
	2025		2024
Currency translation adjustments:
Balance at beginning of period	$	(10,638)	$	(11,024)
Adjustments for foreign currency translation	(1,254)		2,068
Balance at end of period	$	(11,892)	$	(8,956)

Interest rate swaps:
Balance at beginning of period	$	—	$	1,173
Unrealized losses, net of taxes of $0 and $253, respectively (a)	—		(953)
Reclassification of losses included in interest expense, net, net of taxes of $0 and $58, respectively	—		(220)

Other comprehensive income	—		(1,173)
Balance at end of period	$	—	$	—

Defined benefit plans:
Balance at beginning of period	$	(105)	$	(100)
Amortization of net gains, net of taxes of $(1) and $0, respectively (b)	2		1


Balance at end of period	$	(103)	$	(99)


	Six Months Ended September 30,
	2025		2024
Currency translation adjustments:
Balance at beginning of period	$	(12,020)	$	(10,137)
Adjustments for foreign currency translation	128		1,181
Balance at end of period	$	(11,892)	$	(8,956)

Interest rate swaps:
Balance at beginning of period	$	—	$	1,111
Unrealized losses, net of taxes of $0 and $153, respectively	—		(577)
Reclassification of losses included in interest expense, net, net of taxes of $0 and $142, respectively	—		(534)
Other comprehensive income (loss)	—		(1,111)
Balance at end of period	$	—	$	—

Defined benefit plans:
Balance at beginning of period	$	(107)	$	(100)
Amortization of net losses, net of taxes of $(1) and $0, respectively (b)	4		1


Balance at end of period	$	(103)	$	(99)

(b) Amortization of actuarial gains (losses) out of accumulated comprehensive loss are included in the computation of net periodic pension expense.

LEASES - Schedule of Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Maturities of operating lease liabilities
Year Ending March 31, 2026 (excluding the six months ended September 30, 2025)	$ 8,216
2027	15,395
2028	14,087
2029	12,601
2030	11,035
Thereafter	31,294
Total lease liabilities	92,628
Less: Imputed interest	(17,172)
Present value of lease liabilities	$ 75,456	$ 69,364

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Current assets:
Cash and cash equivalents	$ 31,471	$ 225,845
Accounts receivable, net of allowance for expected credit losses of $835 and $1,137, respectively	159,368	155,651
Inventories, net	234,563	194,876
Prepaid expenses and other current assets	22,366	16,489
Total current assets	447,768	592,861
Property, plant and equipment, net of accumulated depreciation of $120,862 and $113,219, respectively	98,452	93,415
Goodwill	365,308	264,092
Intangible assets, net	526,838	357,910
Other assets	79,587	70,787
Total assets	1,517,953	1,379,065
Current liabilities:
Accounts payable	69,083	54,767
Accrued and other current liabilities	93,022	92,435
Total current liabilities	162,105	147,202
Long-term debt	60,000	0
Retirement benefits payable	1,061	1,083
Other long-term liabilities	146,230	138,347
Total liabilities	369,396	286,632
Commitments and contingencies (See Note 13)
Redeemable noncontrolling interest	18,590	20,187
Equity:
Common shares	178	177
Preferred shares	0	0
Additional paid-in capital	512,719	501,286
Treasury shares, at cost (1,115 and 1,027 shares, respectively)	(148,431)	(122,125)
Retained earnings	777,496	705,035
Accumulated other comprehensive loss	(11,995)	(12,127)
Total equity	1,129,967	1,072,246
Total liabilities, redeemable noncontrolling interest and equity	$ 1,517,953	$ 1,379,065

GOODWILL AND INTANGIBLE ASSETS (Tables)

6 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill as of September 30, 2025 and March 31, 2025 were as follows (in thousands):


	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total
Balance at March 31, 2025	$	230,880	$	9,437	$	23,775	$	264,092
Aspen Manufacturing acquisition	100,134		—		—		100,134
PF WaterWorks acquisition	619		—		—		619


Currency translation	45		144		274		463
Balance at September 30, 2025	$	331,678	$	9,581	$	24,049	$	365,308

Schedule of Intangible Assets

The following table provides information about our intangible assets (in thousands, except years):


		September 30, 2025				March 31, 2025
	Weighted Avg Life (Years)	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Finite-lived intangible assets:
Patents	10	$	17,786	$	(10,751)	$	17,784	$	(10,189)
Customer lists and amortized trademarks	15	568,213		(145,190)		402,765		(127,551)
Non-compete agreements	6	1,000		(727)		1,000		(639)
Other	10	6,276		(3,392)		6,277		(3,141)
		$	593,275	$	(160,060)	$	427,826	$	(141,520)
Trade names and trademarks not being amortized:		$	93,623	$	—	$	71,604	$	—

Schedule of Estimated Future Amortization for Intangible Assets

The following table shows the estimated future amortization for intangible assets, as of September 30, 2025, for the remainder of the current fiscal year and the next four fiscal years ending March 31 (in thousands):


2026	$	19,157
2027	37,104
2028	36,712
2029	36,636
2030	36,570
Thereafter	267,036
Total	$	433,215

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

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+ Details

REVENUE RECOGNITION (Tables)

6 Months Ended

Sep. 30, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

Disaggregation of revenues reconciled to our reportable segments is as follows (in thousands):


	Three Months Ended September 30, 2025								Six Months Ended September 30, 2025
	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total		Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total
Build-to-order	$	—	$	—	$	28,087	$	28,087	$	—	$	—	$	56,513	$	56,513
Book-and-ship	206,278		38,764		3,822		248,864		401,253		75,539		7,292		484,084
Net revenues	$	206,278	$	38,764	$	31,909	$	276,951	$	401,253	$	75,539	$	63,805	$	540,597


	Three Months Ended September 30, 2024								Six Months Ended September 30, 2024
	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total		Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total
Build-to-order	$	—	$	—	$	28,655	$	28,655	$	—	$	—	$	55,832	$	55,832
Book-and-ship	156,764		38,489		4,018		199,271		315,302		75,235		7,734		398,271
Net revenues	$	156,764	$	38,489	$	32,673	$	227,926	$	315,302	$	75,235	$	63,566	$	454,103

Schedule of Accounts Receivable, Allowance for Credit Loss

The following table summarizes the activity in the allowance for credit losses (in thousands):


	September 30, 2025		September 30, 2024
Balance at beginning of the year:	$	1,137	$	908
Reserve	249		723
Write offs, net of recoveries	(551)		(504)
Ending balance	$	835	$	1,127

Schedule of Contract Liabilities

Contract liability represents our contractual billings in advance of revenue recognized for a contract and is included in accrued and other current liabilities in our consolidated balance sheets were as follows (in thousands):


	September 30, 2025		September 30, 2024
Balance at beginning of the year:	$	932	$	548
Revenue recognized during the period	(606)		(370)
New contracts and revenue added to existing contracts during the period	783		518
Ending balance	$	1,109	$	696

REVENUE RECOGNITION - Schedule of Contract Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Change in Contract Liabilities [Roll Forward]
Balance at beginning of period	$ 932	$ 548
Revenue recognized during the period	(606)	(370)
New contracts and revenue added to existing contracts during the period	783	518
Balance at end of period	$ 1,109	$ 696

CONSOLIDATION OF VARIABLE INTEREST ENTITIES AND REDEEMABLE NONCONTROLLING INTEREST - Schedule of Changes In Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	$ 20,187
Ending balance	18,590
Variable Interest Entity
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	20,187	$ 19,355
Net income attributable to redeemable noncontrolling interest	403	828
Distributions to redeemable noncontrolling interest shareholder	(2,000)	0
Ending balance	$ 18,590	$ 20,183

INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
INCOME TAXES (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income (loss) from continuing operations before income taxes	$ 55,468	$ 49,531	$ 109,851	$ 102,331
Provision for income taxes	$ 14,654	$ 12,910	$ 27,867	$ 26,859
Effective tax rate	26.40%	26.10%	25.40%	26.20%
Decrease in unrecognized tax benefits is reasonably possible	$ 6,700		$ 6,700

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash flows from operating activities:
Net income	$ 81,984	$ 75,472
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	7,848	7,045
Amortization of acquisition-related intangible assets & inventory step-up	19,889	12,831
Amortization of deferred financing fees	499	383
Provision for inventory reserves	218	840
Provision for credit losses	249	723
Share-based compensation	7,628	6,891
Net loss (gain) on disposals of property, plant and equipment	208	(39)
Net pension benefit	33	33
Net deferred taxes	296	1,516
Changes in operating assets and liabilities:
Accounts receivable	11,685	11,301
Inventories	(10,129)	(25,282)
Prepaid expenses and other current assets	(5,679)	(2,085)
Other assets	176	153
Accounts payable and other current liabilities	7,298	40,326
Retirement benefits payable and other liabilities	264	61
Net cash provided by operating activities	122,467	130,169
Cash flows from investing activities:
Capital expenditures	(5,984)	(8,587)
Proceeds from sale of assets	54	43
Cash paid for investments	0	(500)
Cash paid for acquisitions, net of cash received	(325,509)	(32,305)
Net cash used in investing activities	(331,439)	(41,349)
Cash flows from financing activities:
Borrowings on line of credit	138,394	32,723
Repayments of line of credit	(78,394)	(198,723)
Payments of deferred loan costs	(2,837)	0
Purchase of treasury shares	(26,073)	(12,287)
Payments of contingent consideration	(4,875)	(700)
Proceeds from equity issuance	0	347,407
Distributions to redeemable noncontrolling interest shareholder	(2,000)	0
Dividends	(9,074)	(6,523)
Net cash provided by financing activities	15,141	161,897
Effect of exchange rate changes on cash and equivalents	(543)	347
Net change in cash and cash equivalents	(194,374)	251,064
Cash and cash equivalents, beginning of period	225,845	22,156
Cash and cash equivalents, end of period	$ 31,471	$ 273,220

SHARE-BASED COMPENSATION - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025	Sep. 16, 2024
Restricted Stock Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares outstanding (in shares)	82,285	96,633	82,285	96,633
Performance-based vesting range (in percent)			100.00%
Restricted Stock Performance Shares \| Cliff Vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			36 months
Granted (in shares)	0	0	16,982	18,962
Restricted Stock Performance Shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based vesting range (in percent)			0.00%
Restricted Stock Performance Shares \| Minimum \| Cliff Vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based vesting range (in percent)			0.00%
Restricted Stock Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based vesting range (in percent)			200.00%
Restricted Stock Performance Shares \| Maximum \| Cliff Vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based vesting range (in percent)			200.00%
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted shares outstanding (in shares)	189,149		189,149		194,149
Granted (in shares)			40,851
Unrecognized compensation costs related to unvested restricted shares	$ 19.6		$ 19.6
Weighted average vesting period (in percent)			1 year 9 months 18 days
Fair value of restricted shares granted	0.9	$ 0.9	$ 8.2	$ 7.2
Fair value of restricted shares vested	$ 0.7	$ 0.9	$ 12.5	$ 10.4
2015 Plan \| Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock granted (in shares)						1,230,000
2024 Plan \| Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock granted (in shares)	850,000		850,000
Shares available for issuance (in shares)	807,740		807,740

EARNINGS PER SHARE

6 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

EARNINGS PER SHARE

The following table sets forth the reconciliation of the numerator and the denominator of basic and diluted earnings per share for the three and six months ended September 30, 2025 and 2024 (amounts in thousands, except per share data):


	Three Months Ended September 30,				Six Months Ended September 30,
	2025		2024		2025		2024
Net income	$	40,814	$	36,621	$	81,984	$	75,472
Less: Net income attributable to redeemable noncontrolling interest	(158)		(570)		(403)		(828)
Net income attributable to CSW Industrials, Inc.	$	40,656	$	36,051	$	81,581	$	74,644

Weighted average shares:
Common stock	16,700		15,765		16,710		15,599
Participating securities	85		101		86		102
Denominator for basic earnings per common share	16,785		15,866		16,796		15,701
Potentially dilutive securities	57		75		56		69
Denominator for diluted earnings per common share	16,842		15,941		16,852		15,770

Net income per share attributable to CSW Industrials, Inc.:
Basic	$	2.42	$	2.27	$	4.86	$	4.75
Diluted	$	2.41	$	2.26	$	4.84	$	4.73

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Cash flow hedging activity, taxes	$ 0	$ 312	$ 0	$ 295
Pension and other postretirement effect, taxes	$ (1)	$ 0	$ (1)	$ 0

LEASES (Tables)

6 Months Ended

Sep. 30, 2025

Leases [Abstract]

Schedule of Components of Lease Expense, Lease Assets and Liabilities, Supplemental Cash Flow, and Other Information


	Three Months Ended September 30,				Six Months Ended September 30,
(in thousands)	2025		2024		2025		2024
Components of Operating Lease Expense






Operating lease expense (a)	$	4,011	$	3,310	$	7,950	$	6,347
Short-term lease expense	61		231		288		450
Total operating lease expense	$	4,072	$	3,541	$	8,238	$	6,797
(a) Included in cost of revenues and selling, general and administrative expenses


(in thousands)	September 30, 2025		March 31, 2025







Operating Lease Assets and Liabilities
Right-of-use assets, net (b)	$	68,292	$	62,061

Short-term lease liabilities (c)	$	12,312	$	11,244
Long-term lease liabilities (c)	63,144		58,120
Total operating lease liabilities	$	75,456	$	69,364
(b) Included in other assets
(c) Included in accrued and other current liabilities and other long-term liabilities


	Six Months Ended September 30,
(in thousands)	2025			2024
Supplemental Cash Flow
Cash paid for amounts included in the measurement of operating lease liabilities (d)	$	8,034		$	6,117
Right-of-use assets obtained in exchange for new operating lease liabilities	868			20,089
(d) Included in our Consolidated Statements of Cash Flows under operating activities in net income and accounts payable and other current liabilities

Other Information for Operating Leases
Weighted average remaining lease term (in years)	6.87			7.79
Weighted average discount rate	5.7		%	5.1		%

Schedule of Maturities of Lease Liabilities


Maturities of operating lease liabilities were as follows (in thousands):
Year Ending March 31, 2026 (excluding the six months ended September 30, 2025)	$	8,216
2027	15,395
2028	14,087
2029	12,601
2030	11,035
Thereafter	31,294
Total lease liabilities	92,628
Less: Imputed interest	(17,172)
Present value of lease liabilities	$	75,456

SHARE-BASED COMPENSATION

6 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Abstract]

SHARE-BASED COMPENSATION

Prior to September 17, 2024, we maintained the shareholder-approved 2015 Equity and Incentive Compensation Plan (the “2015 Plan”), which provided for the issuance of up to 1,230,000 shares of CSW common stock through the grant of stock options, stock appreciation rights, restricted shares, restricted stock units, performance shares, performance units or other share-based awards, to employees, officers and non-employee directors. On August 15, 2024, our shareholders approved the 2024 Equity and Incentive Compensation Plan (the “2024 Plan”) and on September 17, 2024, we registered the offering of shares under the 2024 Plan on a Registration Statement on Form S-8 (the “2024 Plan Registration”). Following the 2024 Plan Registration, no awards have been or will be granted under the 2015 Plan, and the 2015 Plan’s remaining share reserve for new awards was cancelled. Any awards granted under the 2015 Plan prior to the 2024 Plan Registration remain outstanding and vest in accordance with their original terms and conditions.

The 2024 Plan provides for the issuance of up to 850,000 shares of CSW common stock (less any shares granted pursuant to awards under the 2015 Plan prior to the 2024 Plan Registration) through the grant of stock options, stock appreciation rights, restricted shares, restricted stock units, performance shares, performance units or other share-based awards, to employees, officers and non-employee directors. As of September 30, 2025, and due to awards granted under the 2015 Plan prior to the 2024 Plan Registration, as well as new grant activity under the 2024 Plan, 807,740 shares were reserved and available for issuance under the 2024 Plan.

We recorded share-based compensation expense as follows for the three and six months ended September 30, 2025 and 2024 (in thousands):


	Three Months Ended September 30,				Six Months Ended September 30,
	2025		2024		2025		2024
Share-based compensation expense	$	3,591	$	3,145	$	7,628	$	6,891
Related income tax benefit (a)	(898)		(786)		(1,907)		(1,723)
Net share-based compensation expense	$	2,693	$	2,359	$	5,721	$	5,168

(a) Income tax benefit is estimated using the statutory rate.

Restricted share activity was as follows:


	Six Months Ended September 30, 2025
	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding at March 31, 2025:	194,149	$	203.62
Granted (a)	40,851	396.18
Vested (a)	(43,044)	167.92
Canceled	(2,807)	249.98
Outstanding at September 30, 2025	189,149	$	227.30

(a) Including incremental shares delivered to grant recipients as a result of performance-based awards vesting in excess of target (100%).

During the restriction period, the holders of restricted shares are entitled to vote and receive dividends. Unvested restricted shares outstanding as of September 30, 2025 and 2024 included 82,285 and 96,633 shares (at target), respectively, with performance-based vesting provisions, and a vesting range of 0%-200% based on pre-defined performance targets with market conditions. Performance-based awards accrue dividend equivalents, which are settled upon (and to the extent of) vesting of the underlying award and do not have the right to vote until vested. Performance-based awards are earned upon the achievement of objective performance targets and are payable in common shares. Compensation expense is calculated based on the fair market value as determined by a Monte Carlo simulation and is recognized over a 36-month cliff vesting period. We granted no awards with performance-based vesting provisions during the three months ended September 30, 2025 and 2024. We granted 16,982 and 18,962 awards with performance-based vesting provisions during the six months ended September 30, 2025 and 2024, respectively, with a vesting range of 0%-200%.

At September 30, 2025, we had unrecognized compensation cost related to unvested restricted shares of $19.6 million, which will be amortized into net income over the remaining weighted average vesting period of approximately 1.8 years. The total fair value of restricted shares granted during the three months ended September 30, 2025 and 2024 was $0.9 million and $0.9 million, respectively. The total fair value of restricted shares granted during the six months ended September 30, 2025 and 2024 was $8.2 million and $7.2 million, respectively. The total fair value of restricted shares vested during the three months ended September 30, 2025 and 2024 was $0.7 million and $0.9 million, respectively. The total fair value of restricted shares vested during the six months ended September 30, 2025 and 2024 was $12.5 million and $10.4 million, respectively.

DERIVATIVE INSTRUMENTS AND HEDGE ACCOUNTING	6 Months Ended
DERIVATIVE INSTRUMENTS AND HEDGE ACCOUNTING	Sep. 30, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS AND HEDGE ACCOUNTING	DERIVATIVE INSTRUMENTS AND HEDGE ACCOUNTING From time to time, we enter into interest rate swap agreements to hedge exposure to floating interest rates on certain portions of our debt. On February 7, 2023, we entered into an interest rate swap to hedge our exposure to variability in cash flows from interest payments on the first $100.0 million of borrowings under our Revolving Credit Facility. This interest rate swap fixed the one-month SOFR rate at 3.85% for the first $100.0 million borrowing under our Revolving Credit Facility and was scheduled to expire on May 18, 2026. In September 2024, upon the payoff of the outstanding Revolving Credit Facility balance, we terminated the interest rate swap and incurred a cash payment of $0.4 million, which was reported in our Consolidated Statements of Income in interest expense, net. As of September 30, 2025 and 2024, we had no notional amount outstanding designated as an interest rate swap with third parties. The impact of changes in fair value of the interest rate swap is included in Note 15. Current and non-current derivative assets are reported in our consolidated balance sheets in prepaid expenses and other current assets and other assets, respectively. Current and non-current derivative liabilities are reported in our consolidated balance sheets in accrued and other current liabilities and other long-term liabilities, respectively.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

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+ Details

CONSOLIDATION OF VARIABLE INTEREST ENTITIES AND REDEEMABLE NONCONTROLLING INTEREST (Tables)

6 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Variable Interest Entities

Whitmore JV’s total net assets are presented below (in thousands):


	September 30, 2025		March 31, 2025
Cash	$	3,879	$	9,591
Accounts receivable, net	8,435		8,407
Inventories, net	4,480		4,823
Prepaid expenses and other current assets	370		254
Property, plant and equipment, net	13,709		13,452
Intangible assets, net	4,454		4,859
Other assets	845		597
Total assets	$	36,172	$	41,983

Accounts payable	$	4,779	$	7,755
Accrued and other current liabilities	1,740		1,605
Other long-term liabilities	624		414
Total liabilities	$	7,143	$	9,774

Schedule of Changes in Redeemable Noncontrolling Interest

Changes in redeemable noncontrolling interest for the six-month period ended September 30, 2025 were as follows (in thousands):


	September 30, 2025		September 30, 2024
Balance at beginning of the year	$	20,187	$	19,355

Net income attributable to redeemable noncontrolling interest	403		828

Distributions to redeemable noncontrolling interest shareholder	(2,000)		—

Ending balance	$	18,590	$	20,183

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References + Details

SEGMENTS - Schedule of Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025
Segment Reporting Information [Line Items]
Revenues, net	$ 276,951	$ 227,926	$ 540,597	$ 454,103
Cost of revenues	157,766	124,025	305,970	242,781
Selling, general, and administrative expenses	62,405	52,352	122,971	104,712
Operating income	56,780	51,549	111,656	106,610
Depreciation & amortization	14,391	9,950	27,729	19,883
Capital expenditures	3,080	5,486	5,984	8,587
Total assets	1,517,953		1,517,953		$ 1,379,065
Contractor Solutions
Segment Reporting Information [Line Items]
Revenues, net	206,278	156,764	401,253	315,302
Reportable Segments
Segment Reporting Information [Line Items]
Revenues, net	276,951	227,926	540,597	454,103
Cost of revenues	160,003	126,140	310,003	246,822
Selling, general, and administrative expenses	55,886	45,746	109,328	90,408
Operating income	63,299	58,155	125,299	120,914
Depreciation & amortization	14,342	9,905	27,635	19,796
Capital expenditures	3,080	5,403	5,984	8,488
Total assets	1,501,479		1,501,479		1,168,097
Reportable Segments \| Contractor Solutions
Segment Reporting Information [Line Items]
Revenues, net	206,278	156,764	401,253	315,302
Cost of revenues	114,424	82,494	220,890	163,802
Selling, general, and administrative expenses	40,669	30,086	78,185	59,312
Operating income	53,375	46,254	106,133	96,138
Depreciation & amortization	12,555	8,002	24,095	15,985
Capital expenditures	2,398	4,550	4,476	6,646
Total assets	1,272,563		1,272,563		941,087
Reportable Segments \| Specialized Reliability Solutions
Segment Reporting Information [Line Items]
Revenues, net	38,764	38,489	75,540	75,235
Cost of revenues	25,845	24,530	49,466	46,064
Selling, general, and administrative expenses	7,868	8,185	15,811	16,294
Operating income	5,093	5,819	10,336	12,970
Depreciation & amortization	1,347	1,409	2,684	2,832
Capital expenditures	409	647	1,131	1,161
Total assets	143,642		143,642		145,663
Reportable Segments \| Engineered Building Solutions
Segment Reporting Information [Line Items]
Revenues, net	31,909	32,673	63,804	63,566
Cost of revenues	19,734	19,116	39,647	36,956
Selling, general, and administrative expenses	7,349	7,475	15,332	14,802
Operating income	4,831	6,082	8,830	11,806
Depreciation & amortization	440	494	856	979
Capital expenditures	273	206	377	681
Total assets	85,274		85,274		81,347
Intersegment revenue
Segment Reporting Information [Line Items]
Revenues, net	2,237	2,115	4,033	4,041
Intersegment revenue \| Contractor Solutions
Segment Reporting Information [Line Items]
Revenues, net	2,190	2,070	3,955	3,950
Intersegment revenue \| Specialized Reliability Solutions
Segment Reporting Information [Line Items]
Revenues, net	42	45	73	91
Intersegment revenue \| Engineered Building Solutions
Segment Reporting Information [Line Items]
Revenues, net	5	0	5	0
Eliminations and Other
Segment Reporting Information [Line Items]
Revenues, net	(2,237)	(2,115)	(4,033)	(4,041)
Cost of revenues	(2,237)	(2,115)	(4,033)	(4,041)
Selling, general, and administrative expenses	6,519	6,606	13,643	14,304
Operating income	(6,519)	(6,606)	(13,643)	(14,304)
Depreciation & amortization	49	45	94	87
Capital expenditures	0	$ 83	0	$ 99
Total assets	$ 16,474		$ 16,474		$ 210,968

SEGMENTS

6 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

SEGMENTS

As discussed in Note 20 to our consolidated financial statements in our Annual Report, we conduct our operations through three reportable segments:

•Contractor Solutions

•Specialized Reliability Solutions

•Engineered Building Solutions

The Eliminations and Other segment information below is included to reconcile segment data to the consolidated financial statements and includes general expenses that are applicable to the consolidated group and are, therefore, not allocated to the other reportable segments. All expenses reported within the Eliminations and Other segment are not included in our chief operating decision maker's ("CODM") evaluation of the operating performance of the other reportable segments.

The following is a summary of the financial information of our reporting segments reconciled to the amounts reported in the consolidated financial statements (in thousands).

Three Months Ended September 30, 2025:


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
Revenues, net to external customers	$	206,278	$	38,764	$	31,909	$	276,951	$	—	$	276,951
Intersegment revenue	2,190		42		5		2,237		(2,237)		—
Cost of revenues	114,424		25,845		19,734		160,003		(2,237)		157,766
Selling, general, and administrative expenses	40,669		7,868		7,349		55,886		6,519		62,405
Operating income	53,375		5,093		4,831		63,299		(6,519)		56,780
Depreciation & amortization	12,555		1,347		440		14,342		49		14,391
Capital expenditures	2,398		409		273		3,080		—		3,080

Three Months Ended September 30, 2024:


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
Revenues, net to external customers	$	156,764	$	38,489	$	32,673	$	227,926	$	—	$	227,926
Intersegment revenue	2,070		45		—		2,115		(2,115)		—
Cost of revenues	82,494		24,530		19,116		126,140		(2,115)		124,025
Selling, general, and administrative expenses	30,086		8,185		7,475		45,746		6,606		52,352
Operating income	46,254		5,819		6,082		58,155		(6,606)		51,549
Depreciation & amortization	8,002		1,409		494		9,905		45		9,950
Capital expenditures	4,550		647		206		5,403		83		5,486

Six Months Ended September 30, 2025


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
Revenues, net to external customers	$	401,253	$	75,540	$	63,804	$	540,597	$	—	$	540,597
Intersegment revenue	3,955		73		5		4,033		(4,033)		—
Cost of revenues	220,890		49,466		39,647		310,003		(4,033)		305,970
Selling, general, and administrative expenses	78,185		15,811		15,332		109,328		13,643		122,971
Operating income	106,133		10,336		8,830		125,299		(13,643)		111,656
Depreciation & amortization	24,095		2,684		856		27,635		94		27,729
Capital expenditures	4,476		1,131		377		5,984		—		5,984

Six Months Ended September 30, 2024


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
Revenues, net to external customers	$	315,302	$	75,235	$	63,566	$	454,103	$	—	$	454,103
Intersegment revenue	3,950		91		—		4,041		(4,041)		—
Cost of revenues	163,802		46,064		36,956		246,822		(4,041)		242,781
Selling, general, and administrative expenses	59,312		16,294		14,802		90,408		14,304		104,712
Operating income	96,138		12,970		11,806		120,914		(14,304)		106,610
Depreciation & amortization	15,985		2,832		979		19,796		87		19,883
Capital expenditures	6,646		1,161		681		8,488		99		8,587

TOTAL ASSETS


(in thousands)	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Subtotal - Reportable Segments		Eliminations and Other		Total
September 30, 2025	$	1,272,563	$	143,642	$	85,274	$	1,501,479	$	16,474	$	1,517,953
March 31, 2025	941,087		145,663		81,347		1,168,097		210,968		1,379,065

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

GOODWILL AND INTANGIBLE ASSETS - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense of intangible assets	$ 9.4	$ 6.5	$ 18.0	$ 11.9

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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+ Details

ACQUISITIONS - Additional Information (Details) - USD ($) $ in Thousands				3 Months Ended		5 Months Ended	6 Months Ended		12 Months Ended
	May 01, 2025	Nov. 04, 2024	Aug. 01, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025
Business Combination [Line Items]
Cash paid for acquisitions, net of cash received							$ 325,509	$ 32,305
Goodwill				$ 365,308		$ 365,308	365,308		$ 264,092
Acquisition-related contingent consideration liabilities				19,700		19,700	19,700		24,400
Aspen Manufacturing acquisition
Business Combination [Line Items]
Percent of outstanding equity acquired	100.00%
Business combination, consideration transferred	$ 327,600
Cash	2,289			2,289		2,289	2,289
Cash paid for acquisitions, net of cash received	313,500
Business combination consideration transferred working capital adjustment	11,800
Other payments to acquire businesses	1,700
Goodwill	100,421			100,134		100,134	100,134
Revenues						84,500
Income before income taxes						17,300
Transaction expenses incurred				200			400		1,100
Amortization, inventory step-up				700			1,500
Depreciation				0	$ 200		100	400
Transaction expenses				200	200		400	1,500
Estimated additional interest expense				0	1,900		600	3,800
Income tax expense (benefit)				200	1,500		(100)	3,200
Finite lived intangible assets acquired				165,000		165,000	165,000
Indefinite lived intangible assets acquired				22,000		22,000	22,000
Accounts receivable	15,253			15,191		15,191	15,191
Inventory	30,851			31,162		31,162	31,162
Other current assets	150			150		$ 150	150
Aspen Manufacturing acquisition \| Customer Lists
Business Combination [Line Items]
Finite lived intangible assets acquired	$ 165,000
Assets acquired, amortization period	15 years
Aspen Manufacturing acquisition \| Fair Value Adjustments to Inventory
Business Combination [Line Items]
Amortization				$ 0	$ 2,800		900	$ 5,500
PF WaterWorks acquisition
Business Combination [Line Items]
Business combination, consideration transferred		$ 45,800
Cash paid for acquisitions, net of cash received		40,000
Business combination consideration transferred working capital adjustment		2,600
Goodwill		10,900
Transaction expenses incurred							0		1,400
Noncurrent contingent consideration		$ 3,200
Business combination target period		3 years 2 months 12 days
Accounts receivable		$ 1,500
Inventory		3,800
Fair value of other current asset		200
Fair value of other assets		400
Fair value of current liabilities acquired		700
Other liabilities		$ 100
Assets acquired, amortization period		15 years
PF WaterWorks acquisition \| Trademarks
Business Combination [Line Items]
Indefinite lived intangible assets acquired		$ 3,100
PF WaterWorks acquisition \| Patents
Business Combination [Line Items]
Indefinite lived intangible assets acquired		600
PF WaterWorks acquisition \| Customer Lists
Business Combination [Line Items]
Finite lived intangible assets acquired		$ 26,200
Assets acquired, amortization period		15 years
PF WaterWorks acquisition \| Patents
Business Combination [Line Items]
Assets acquired, amortization period		5 years
PSP Products, Inc.
Business Combination [Line Items]
Business combination, consideration transferred			$ 51,300
Cash paid for acquisitions, net of cash received			32,500
Business combination consideration transferred working capital adjustment			7,000
Goodwill			7,300
Transaction expenses incurred							$ 0		500
Noncurrent contingent consideration			$ 11,800
Business combination target period			2 years 6 months
Accounts receivable			$ 4,400
Inventory			8,900
Fair value of other current asset			300
Other current assets			300
Fair value of other assets			700
Fair value of current liabilities acquired			2,700
Other liabilities			$ 300
Assets acquired, amortization period			15 years
Acquisition-related contingent consideration liabilities									$ 2,100
PSP Products, Inc. \| Valuation Technique, Option Pricing Model
Business Combination [Line Items]
Noncurrent contingent consideration			$ 4,800
PSP Products, Inc. \| Valuation Technique, Consensus Pricing Model
Business Combination [Line Items]
Noncurrent contingent consideration			7,000
PSP Products, Inc. \| Trademarks
Business Combination [Line Items]
Indefinite lived intangible assets acquired			2,400
PSP Products, Inc. \| Customer Lists
Business Combination [Line Items]
Finite lived intangible assets acquired			$ 30,000
Assets acquired, amortization period			15 years

SHAREHOLDERS' EQUITY (Tables)

6 Months Ended

Sep. 30, 2025

Equity [Abstract]

Schedule of Stockholders Equity

Common Stock


	September 30, 2025		September 30, 2024
	Common Stock	Treasury Stock	Common Stock	Treasury Stock
Balance at beginning of the year	17,809,590	1,026,941	16,465,776	952,394
Vesting of performance shares and restricted stock units	40,167	14,966	39,064	14,283
Reissuance of treasury shares	—	(15,539)	—	(17,186)
Restricted stock awards activities	1,827	—	1,649	—
Share repurchases	—	88,450	—	32,450
Equity issuance	—	—	1,265,000	—
Ending balance	17,851,584	1,114,818	17,771,489	981,941

GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Mar. 31, 2025
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 593,275	$ 427,826
Accumulated Amortization	(160,060)	(141,520)
Trademarks and Trade Names
Indefinite-lived Intangible Assets [Line Items]
Gross Amount	$ 93,623	71,604
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted Avg Life (Years)	10 years
Gross Amount	$ 17,786	17,784
Accumulated Amortization	$ (10,751)	(10,189)
Customer lists and amortized trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Avg Life (Years)	15 years
Gross Amount	$ 568,213	402,765
Accumulated Amortization	$ (145,190)	(127,551)
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Avg Life (Years)	6 years
Gross Amount	$ 1,000	1,000
Accumulated Amortization	$ (727)	(639)
Other
Finite-Lived Intangible Assets [Line Items]
Weighted Avg Life (Years)	10 years
Gross Amount	$ 6,276	6,277
Accumulated Amortization	$ (3,392)	$ (3,141)

SUBSEQUENT EVENTS	6 Months Ended
SUBSEQUENT EVENTS	Sep. 30, 2025
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTSOn October 1, 2025, the Company announced that we entered a definitive agreement to acquire Motors & Armatures Parts ("MARS Parts") for $650.0 million in cash and additional contingent consideration of up to $20.0 million based on the business meeting defined financial targets. The acquisition will be funded with a combination of a Syndicated Term Loan A and borrowings under our existing $700 million revolving credit facility, with closing expected to occur in the third quarter of fiscal year 2026 following the satisfaction of customary closing conditions, including the expiration or termination of any waiting periods under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended. During the three months ended September 30, 2025, the Company incurred $1.5 million of transaction expenses in connection with the acquisition.

SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands	Oct. 01, 2025	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024
Subsequent Event [Line Items]
Cash paid for acquisitions, net of cash received			$ 325,509	$ 32,305
Motors And Armatures Parts
Subsequent Event [Line Items]
Transaction expenses incurred		$ 1,500
Motors And Armatures Parts \| Subsequent Event
Subsequent Event [Line Items]
Cash paid for acquisitions, net of cash received	$ 650,000
Noncurrent contingent consideration	20,000
Motors And Armatures Parts \| Subsequent Event \| Revolving Credit Facility \| Line of Credit
Subsequent Event [Line Items]
Debt instrument, face amount	$ 700,000

INVENTORIES (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 85,923	$ 54,761
Work in process	5,822	5,969
Finished goods	153,096	144,897
Total inventories	244,841	205,627
Less: Obsolescence reserve	(10,278)	(10,751)
Inventories, net	$ 234,563	$ 194,876

SEGMENTS - Additional Information (Details)	6 Months Ended
SEGMENTS - Additional Information (Details)	Sep. 30, 2025 segment
Segment Reporting [Abstract]
Number of reportable segments	3

ACQUISITIONS (Tables)

6 Months Ended

Sep. 30, 2025

Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]

Schedule of Estimate of the Aggregate Fair Value of Assets Acquired and Liabilities Assumed

The following table summarizes the Company's best initial estimate of the aggregate fair value of the assets acquired and liabilities assumed at the date of acquisition (in thousands).


	Initial Estimated Fair Value		Measurement Period		Updated Estimated Fair Value
Cash	$	2,289	$	—	$	2,289
Accounts Receivable	15,253		(62)		15,191
Inventory	30,851		311		31,162

Other Current Assets	150		—		150
Property, Plant and Equipment	7,916		—		7,916
Trade Name (indefinite life)	22,000		—		22,000
Customer Lists (useful life of 15 years)	165,000		—		165,000
Right-Of-Use Assets	11,855		—		11,855
Long-Term Indemnity Asset	400		—		400
Other Long-Term Assets	—		1,789		1,789
Accounts Payable	(5,459)		—		(5,459)
Accrued and Other Current Liabilities	(8,943)		(57)		(9,000)
Lease Liabilities - Short-Term	(1,019)		—		(1,019)


Lease Liabilities - Long-Term	(10,836)		—		(10,836)
Contingency Reserve	(400)		—		(400)
Other Long-Term Liabilities	(3,600)		—		(3,600)
Estimated fair value of net assets acquired	225,457		1,981		227,438
Goodwill	100,421		(287)		100,134
Total Purchase Price	$	325,878	$	1,694	$	327,572

Schedule of Unaudited Proforma Financial Information


	Three Months Ended September 30,				Six Months Ended September 30,
	2025		2024		2025		2024
Revenues, net	$	276,951	$	265,843	$	551,040	$	527,058
Net income attributable to CSW Industrials, Inc.	41,362		38,434		84,625		78,503

Net income per share attributable to CSW Industrials, Inc.
Basic	$	2.46	$	2.42	$	5.04	$	5.00
Diluted	$	2.46	$	2.41	$	5.02	$	4.98

LEASES - Schedule of Other Information for Leases (Details)	Sep. 30, 2025	Sep. 30, 2024
Other Information for Operating Leases
Weighted average remaining lease term (in years)	6 years 10 months 13 days	7 years 9 months 14 days
Weighted average discount rate	5.70%	5.10%

SHARE-BASED COMPENSATION (Tables)

6 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Share-Based Compensation Expense

We recorded share-based compensation expense as follows for the three and six months ended September 30, 2025 and 2024 (in thousands):


	Three Months Ended September 30,				Six Months Ended September 30,
	2025		2024		2025		2024
Share-based compensation expense	$	3,591	$	3,145	$	7,628	$	6,891
Related income tax benefit (a)	(898)		(786)		(1,907)		(1,723)
Net share-based compensation expense	$	2,693	$	2,359	$	5,721	$	5,168

(a) Income tax benefit is estimated using the statutory rate.

Schedule of Restricted Share Activity

Restricted share activity was as follows:


	Six Months Ended September 30, 2025
	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding at March 31, 2025:	194,149	$	203.62
Granted (a)	40,851	396.18
Vested (a)	(43,044)	167.92
Canceled	(2,807)	249.98
Outstanding at September 30, 2025	189,149	$	227.30

(a) Including incremental shares delivered to grant recipients as a result of performance-based awards vesting in excess of target (100%).

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2025 shares
Trading Arrangements, by Individual
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Joseph Armes [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	Joseph Armes, the Company’s Chairman, Chief Executive Officer and President, adopted a Rule 10b5-1 trading arrangement on August 12, 2025. Under Mr. Armes’ trading arrangement, he may sell an aggregate of up to 18,000 shares of the Company’s common stock, which are intended to be sold on a monthly basis in equal installments, to the extent practicable. Any sales under the trading arrangement will be made during the period beginning February 15, 2026 (which occurs after the January 2025 termination of his existing Rule 10b5-1 trading arrangement pursuant to its terms) and ending January 15, 2027.
Name	Joseph Armes
Title	Chairman, Chief Executive Officer and President
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	August 12, 2025
Expiration Date	January 15, 2027
Arrangement Duration	521 days
Aggregate Available	18,000

INCOME TAXES	6 Months Ended
INCOME TAXES	Sep. 30, 2025
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES For the three months ended September 30, 2025, we earned $55.5 million from operations before taxes and provided for income taxes of $14.7 million, resulting in an effective tax rate of 26.4%. For the six months ended September 30, 2025, we earned $109.9 million from operations before taxes and provided for income taxes of $27.9 million, resulting in an effective tax rate of 25.4%. The provision for income taxes differed from the statutory rate for the three and six months ended September 30, 2025 primarily due to state income tax (net of federal benefit), executive compensation limitations, and provision for global intangible low-taxed income (“GILTI”); offset by adjustment to tax payable, foreign tax credits, excess tax deductions related to equity compensation and foreign-derived intangible income (“FDII”). For the three months ended September 30, 2024, we earned $49.5 million from operations before taxes and provided for income taxes of $12.9 million, resulting in an effective tax rate of 26.1%. For the six months ended September 30, 2024, we earned $102.3 million from operations before taxes and provided for income taxes of $26.9 million, resulting in an effective tax rate of 26.2%. The provision for income taxes differed from the statutory rate for the three and six months ended September 30, 2024 primarily due to state income tax (net of federal benefit), provision for GILTI, executive compensation limitations, and increases to penalties and interest on uncertain tax positions (“UTP”); offset by foreign tax credits and excess tax deductions related to equity compensation and FDII. The Company expects $6.7 million of reserves for UTPs to either be settled or expire within the next 12 months as the statutes of limitations expire. The Organization for Economic Cooperation and Development introduced a framework under pillar two ("Pillar Two"), which includes a global minimum tax rate of 15% applied on a county-by-country basis for companies with global revenues and profits above certain thresholds. Certain jurisdictions in which we do business have enacted laws implementing Pillar Two. We are monitoring these developments and do not believe these rules will have a material impact on our financial condition and/or consolidated results. On July 4, 2025, the "One Big Beautiful Bill Act" (the "Act") was enacted into law. The Act includes changes to the U.S. tax law that are applicable to the Company, including the reinstatement of 100% bonus depreciation and 100% expensing of research and development costs, a change in the calculation of deductible interest expense, and changes to the U.S. tax treatment of GILTI and FDII. We evaluated the Act during the three months ended September 30, 2025 and estimated the Act to have an immaterial impact on our income tax expenses. We expect the Act will change the timing of our cash tax payments in the current fiscal year and future periods. We will continue to evaluate the impact of the Act as additional guidance becomes available. We have not recognized any impact of the Act as of September 30, 2025.

- Definition

The entire disclosure for income tax.

+ References

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+ Details

REVENUE RECOGNITION

6 Months Ended

Sep. 30, 2025

Revenue from Contract with Customer [Abstract]

REVENUE RECOGNITION

Refer to Note 19 to our consolidated financial statements included in our Annual Report for a description of our disaggregation of revenues. Disaggregation of revenues reconciled to our reportable segments is as follows (in thousands):


	Three Months Ended September 30, 2025								Six Months Ended September 30, 2025
	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total		Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total
Build-to-order	$	—	$	—	$	28,087	$	28,087	$	—	$	—	$	56,513	$	56,513
Book-and-ship	206,278		38,764		3,822		248,864		401,253		75,539		7,292		484,084
Net revenues	$	206,278	$	38,764	$	31,909	$	276,951	$	401,253	$	75,539	$	63,805	$	540,597


	Three Months Ended September 30, 2024								Six Months Ended September 30, 2024
	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total		Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total
Build-to-order	$	—	$	—	$	28,655	$	28,655	$	—	$	—	$	55,832	$	55,832
Book-and-ship	156,764		38,489		4,018		199,271		315,302		75,235		7,734		398,271
Net revenues	$	156,764	$	38,489	$	32,673	$	227,926	$	315,302	$	75,235	$	63,566	$	454,103

As of September 30, 2025 and March 31, 2025, accounts receivable, net balances were $159.4 million and $155.7 million, respectively. As of September 30, 2024 and March 31, 2024, accounts receivable, net balances were $135.3 million and $142.7 million, respectively. The following table summarizes the activity in the allowance for credit losses (in thousands):


	September 30, 2025		September 30, 2024
Balance at beginning of the year:	$	1,137	$	908
Reserve	249		723
Write offs, net of recoveries	(551)		(504)
Ending balance	$	835	$	1,127

Contract Balances

We receive payment from customers based on a contractual billing schedule and specific performance requirements as established in our contracts. We record billings as accounts receivable when an unconditional right to consideration exists. Contract liability represents our contractual billings in advance of revenue recognized for a contract and is included in accrued and other current liabilities in our consolidated balance sheets were as follows (in thousands):


	September 30, 2025		September 30, 2024
Balance at beginning of the year:	$	932	$	548
Revenue recognized during the period	(606)		(370)
New contracts and revenue added to existing contracts during the period	783		518
Ending balance	$	1,109	$	696

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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+ Details

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Statement of Financial Position [Abstract]
Accounts receivable, allowance for expected credit losses	$ 835	$ 1,137
Property, plant and equipment, accumulated depreciation	$ 120,862	$ 113,219
Common shares, par value (in USD per share)	$ 0.01	$ 0.01
Common shares, authorized (in shares)	50,000,000	50,000,000
Common shares, issued (in shares)	17,851,000	17,810,000
Preferred shares, par value (in USD per share)	$ 0.01	$ 0.01
Preferred shares, authorized (in shares)	10,000,000	10,000,000
Preferred shares, issued (in shares)	0	0
Treasury shares, at cost (in shares)	1,115,000	1,027,000

FAIR VALUE MEASUREMENTS - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2025	Mar. 31, 2025
Fair Value Disclosures [Abstract]
Long-term investments	$ 2.5	$ 2.5
Contingent consideration	$ 19.7	$ 24.4

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 40,814	$ 36,621	$ 81,984	$ 75,472
Other comprehensive income (loss):
Foreign currency translation adjustments	(1,254)	2,068	128	1,181
Cash flow hedging activity, net of taxes of $0, $312, $0 and $295, respectively	0	(1,173)	0	(1,111)
Pension and other postretirement effects, net of taxes of $(1), $0, $(1) and $0, respectively	2	1	4	1
Other comprehensive income (loss)	(1,252)	896	132	71
Comprehensive income	39,562	37,517	82,116	75,543
Less: Comprehensive income attributable to redeemable noncontrolling interest	(158)	(570)	(403)	(828)
Comprehensive income attributable to CSW Industrials, Inc.	$ 39,404	$ 36,947	$ 81,713	$ 74,715

SHAREHOLDERS' EQUITY

6 Months Ended

Sep. 30, 2025

Equity [Abstract]

SHAREHOLDERS' EQUITY

Common Stock


	September 30, 2025		September 30, 2024
	Common Stock	Treasury Stock	Common Stock	Treasury Stock
Balance at beginning of the year	17,809,590	1,026,941	16,465,776	952,394
Vesting of performance shares and restricted stock units	40,167	14,966	39,064	14,283
Reissuance of treasury shares	—	(15,539)	—	(17,186)
Restricted stock awards activities	1,827	—	1,649	—
Share repurchases	—	88,450	—	32,450
Equity issuance	—	—	1,265,000	—
Ending balance	17,851,584	1,114,818	17,771,489	981,941

Equity Offering

In September 2024, the Company completed a follow-on equity offering ("Equity Offering"), pursuant to which we issued and sold a total of 1,265,000 shares of our common stock to the public, including shares issued pursuant to the underwriters' full exercise of their over-allotment option, at an offering a price of $285 per share. We received proceeds of $347.4 million, net of underwriting fees and discounts and expenses incurred directly related to the Equity Offering. We used a portion of the proceeds to pay off the outstanding balance of our Revolving Credit Facility at the time of the Equity Offering, and used the remainder of the proceeds for general corporate purposes, including the acquisitions of PF WaterWorks and Aspen Manufacturing, as discussed in Note 2.

Share Repurchase Program

On December 16, 2022, we announced that our Board of Directors authorized a program to repurchase up to $100.0 million of our common stock over a two-year period. On November 18, 2024, we announced that our Board of Directors authorized a new $200.0 million share repurchase program, which replaced the previously announced $100.0 million program. Under the current repurchase program, shares may be repurchased from time to time in the open market or in privately negotiated transactions. Repurchases will be made at our discretion, based on ongoing assessments of the capital needs of the business, the market price of our common stock and general market conditions. Our Board of Directors has established an expiration date of December 31, 2026, for completion of the current repurchase program; however, such program may be limited or terminated at any time at our discretion without notice.

Under the current $200.0 million repurchase program, a total of 72,911 and 88,450 shares were repurchased during the three and six months ended September 30, 2025 for $18.3 million and $23.0 million, respectively. Under the prior $100.0 million repurchase program, 13,658 and 32,454 shares were repurchased during the three and six months ended September 30, 2024 for $4.2 million and $8.9 million, respectively.

In connection with the vesting of share awards, zero and 14,966 shares for zero and $4.4 million, respectively, were tendered by employees to satisfy minimum tax withholding requirements during the three and six months ended September 30, 2025, respectively. zero and 14,283 shares for zero and $3.3 million, respectively, were tendered by employees to satisfy minimum tax withholding requirements during the three and six months ended September 30, 2024, respectively

Dividends

On April 14, 2024, we announced a quarterly dividend increase to a rate of $0.21 per share, which was subsequently increased to a rate of $0.24 per share on October 11, 2024. On April 15, 2025, we announced another quarterly dividend increase to a rate of $0.27 per share. Total dividends of $4.5 million and $3.3 million were paid during the three months ended September 30, 2025 and 2024, respectively. Total dividends of $9.1 million and $6.5 million were paid during the six months ended September 30, 2025 and 2024, respectively.

On October 17, 2025, we announced a quarterly dividend of $0.27 per share payable on November 14, 2025 to shareholders of record as of October 31, 2025. Any future dividends at the existing $0.27 per share quarterly rate or otherwise will be reviewed individually and declared by our Board of Directors in its discretion.

- Definition

The entire disclosure for equity.

+ References

+ Details

LONG-TERM DEBT

6 Months Ended

Sep. 30, 2025

Debt Disclosure [Abstract]

LONG-TERM DEBT

Long-term debt consists of the following (in thousands):


	September 30, 2025		March 31, 2025
Revolving Credit Facility, interest rate of 5.41% (a) and N/A (b)	$	60,000	$	—

(a) Represents the interest rate effective on September 30, 2025.

(b) Interest rate effective on March 31, 2025 was not applicable due to there being no outstanding balance under the Revolving Credit Facility.

Revolving Credit Facility

As discussed in Note 8 to our consolidated financial statements included in our Annual Report, prior to May 2025, we maintained a $500.0 million revolving credit facility that contained a $25.0 million sublimit for the issuance of letters of credit and a $10.0 million sublimit for swingline loans, with an additional $50 million accordion feature (the “Second Amendment”). The credit facility was scheduled to mature on May 18, 2026. Borrowings under the Second Amendment bore interest at either base rate plus between 0.25% to 1.5% or SOFR rate plus between 1.25% to 2.5%, based on the Company’s leverage ratio calculated on a quarterly basis. The base rate was described in the Second Amendment as the highest of (i) the Federal funds effective rate plus 0.50%, (ii) the prime rate quoted by The Wall Street Journal, and (iii) the one-month SOFR rate plus 1.00%. We paid a commitment fee between 0.15% to 0.4% based on the Company’s leverage ratio for the unutilized portion of this facility. Interest and commitment fees were payable at least quarterly and the outstanding principal balance was due at the maturity date. The Second Amendment was secured by a first priority lien on all tangible and intangible assets and stock issued by the Company and its domestic subsidiaries, subject to specified exceptions, and 65% of the voting equity interests in its first-tier foreign subsidiaries.

On May 2, 2025, we entered into a Third Amended and Restated Credit Agreement (the “Third Credit Agreement”) with JPMorgan Chase Bank, N.A., as administrative agent (in such capacity, the “Administrative Agent”) and collateral agent, and the lenders, issuing banks and swingline lender party thereto. The Third Credit Agreement provides for a $700.0 million revolving credit facility that contains a $30.0 million sublimit for the issuance of letters of credit, a $15.0 million sublimit for swingline loans and an additional accordion feature of $250 million. The Third Credit Agreement is scheduled to mature on May 2, 2030. The Company incurred a total of $2.8 million in financing fees, including underwriting fees, which will be amortized over the life of the Third Credit Agreement. The deferred financing fees are recorded in our consolidated balance sheets in other assets. Borrowings under the Third Credit Agreement bear interest at either base rate plus between 0.25% to 1.5% or the adjusted term SOFR rate plus between 1.25% to 2.5%, based on the Company’s leverage ratio calculated on a quarterly basis. The base rate is described in the Third Credit Agreement as the highest of (i) the Federal Reserve Bank of New York effective rate plus 0.50%, (ii) the prime rate quoted by The Wall Street Journal, and (iii) the one-month adjusted term SOFR rate plus 1.00%. We pay a commitment fee between 0.15% to 0.4% based on the Company's leverage ratio for the unutilized portion of this facility. Interest and commitment fees are payable monthly and quarterly, respectively, and the outstanding principal balance is due at the maturity date. The Third Credit Agreement is secured by a first priority lien on substantially all tangible and intangible assets and stock issued by the Company and its material domestic subsidiaries, subject to specified exceptions, and 65% of the voting equity interests in its first-tier foreign subsidiaries.

During the six months ended September 30, 2025, we borrowed $138.4 million and repaid $78.4 million under the Revolving Credit Facility. As of September 30, 2025 and March 31, 2025, we had $60.0 million and $0.0 million, respectively, in our outstanding balance, which resulted in borrowing capacity under the Revolving Credit Facility of $638.7 million and $498.7 million, respectively, net of credit utilization. The financial covenants contained in the Third Credit Agreement require the maintenance of a maximum leverage ratio of 3.00 to 1.00, subject to a temporary increase to 3.75 to 1.00 for 18 months following the consummation of permitted acquisitions with consideration in excess of certain threshold amounts set forth in the Third Credit Agreement. The Third Credit Agreement also requires the maintenance of a minimum interest coverage ratio of

3.00 to 1.00, the calculations and terms of which are defined in the Third Credit Agreement. Covenant compliance is tested quarterly, and we were in compliance with all covenants as of September 30, 2025.

Interest payments on the first $100.0 million borrowing under the Revolving Credit Facility were hedged under an interest rate swap agreement as described in Note 9 until September 2024, when the balance of the Revolving Credit Facility was paid off using a portion of the proceeds from the equity offering as discussed in Note 11 and the hedge was terminated as described in Note 9.

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Revenues, net	$ 276,951	$ 227,926	$ 540,597	$ 454,103
Cost of revenues	(157,766)	(124,025)	(305,970)	(242,781)
Gross profit	119,185	103,901	234,627	211,322
Selling, general and administrative expenses	(62,405)	(52,352)	(122,971)	(104,712)
Operating income	56,780	51,549	111,656	106,610
Interest expense, net	(1,320)	(1,341)	(2,341)	(3,861)
Other income (loss), net	8	(677)	536	(418)
Income before income taxes	55,468	49,531	109,851	102,331
Provision for income taxes	(14,654)	(12,910)	(27,867)	(26,859)
Net income	40,814	36,621	81,984	75,472
Less: Income attributable to redeemable noncontrolling interest	(158)	(570)	(403)	(828)
Net income attributable to CSW Industrials, Inc.	$ 40,656	$ 36,051	$ 81,581	$ 74,644
Net income per share attributable to CSW Industrials, Inc.
Basic (in USD per share)	$ 2.42	$ 2.27	$ 4.86	$ 4.75
Diluted (in USD per share)	$ 2.41	$ 2.26	$ 4.84	$ 4.73
Weighted average number of shares outstanding:
Basic (in shares)	16,785	15,866	16,796	15,701
Diluted (in shares)	16,842	15,941	16,852	15,770

FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Sep. 30, 2025	Mar. 31, 2025
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of the year:	$ 24,385	$ 7,445
Cash payments	(4,650)	(160)
Change in fair value of contingent consideration liabilities	$ 0	2,100
Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Income Extensible List Not Disclosed Flag	Change in fair value of contingent consideration liabilities
Additions	$ 0	15,000
Ending balance	$ 19,735	$ 24,385

GOODWILL AND INTANGIBLE ASSETS - Schedule of Changes in Carrying Amount of Goodwill (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2025 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 264,092
Currency translation	463
Balance at end of period	365,308
Aspen Manufacturing acquisition
Goodwill [Roll Forward]
Goodwill, acquired during period	100,134
Balance at end of period	100,134
PF WaterWorks acquisition
Goodwill [Roll Forward]
Goodwill, acquired during period	619
Contractor Solutions
Goodwill [Roll Forward]
Balance at beginning of period	230,880
Currency translation	45
Balance at end of period	331,678
Contractor Solutions \| Aspen Manufacturing acquisition
Goodwill [Roll Forward]
Goodwill, acquired during period	100,134
Contractor Solutions \| PF WaterWorks acquisition
Goodwill [Roll Forward]
Goodwill, acquired during period	619
Specialized Reliability Solutions
Goodwill [Roll Forward]
Balance at beginning of period	9,437
Currency translation	144
Balance at end of period	9,581
Specialized Reliability Solutions \| Aspen Manufacturing acquisition
Goodwill [Roll Forward]
Goodwill, acquired during period	0
Specialized Reliability Solutions \| PF WaterWorks acquisition
Goodwill [Roll Forward]
Goodwill, acquired during period	0
Engineered Building Solutions
Goodwill [Roll Forward]
Balance at beginning of period	23,775
Currency translation	274
Balance at end of period	24,049
Engineered Building Solutions \| Aspen Manufacturing acquisition
Goodwill [Roll Forward]
Goodwill, acquired during period	0
Engineered Building Solutions \| PF WaterWorks acquisition
Goodwill [Roll Forward]
Goodwill, acquired during period	$ 0

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

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+ Details

SHARE-BASED COMPENSATION - Schedule of Restricted Share Activity (Details) - Restricted Stock	6 Months Ended
	Sep. 30, 2025 $ / shares shares
Number of Shares
Outstanding at beginning of period (in shares) \| shares	194,149
Granted (in shares) \| shares	40,851
Vested (in shares) \| shares	(43,044)
Canceled (in shares) \| shares	(2,807)
Outstanding at end of period (in shares) \| shares	189,149
Weighted Average Grant Date Fair Value
Outstanding at beginning of period (in USD per share) \| $ / shares	$ 203.62
Granted (in USD per share) \| $ / shares	396.18
Vested (in USD per share) \| $ / shares	167.92
Canceled (in USD per share) \| $ / shares	249.98
Outstanding at end of period (in USD per share) \| $ / shares	$ 227.30

REVENUE RECOGNITION - Schedule of Accounts Receivable, Allowance for Credit Loss (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the year:	$ 1,137	$ 908
Reserve	249	723
Write offs, net of recoveries	(551)	(504)
Ending balance	$ 835	$ 1,127

CONSOLIDATION OF VARIABLE INTEREST ENTITIES AND REDEEMABLE NONCONTROLLING INTEREST - Schedule of Variable Interest Entities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Variable Interest Entity [Line Items]
Cash	$ 31,471	$ 225,845
Inventories, net	234,563	194,876
Prepaid expenses and other current assets	22,366	16,489
Property, plant and equipment, net	98,452	93,415
Total assets	1,517,953	1,379,065
Other long-term liabilities	146,230	138,347
Total liabilities	369,396	286,632
Variable Interest Entity
Variable Interest Entity [Line Items]
Cash	3,879	9,591
Accounts receivable, net	8,435	8,407
Inventories, net	4,480	4,823
Prepaid expenses and other current assets	370	254
Property, plant and equipment, net	13,709	13,452
Intangible assets, net	4,454	4,859
Other assets	845	597
Total assets	36,172	41,983
Accounts payable	4,779	7,755
Accrued and other current liabilities	1,740	1,605
Other long-term liabilities	624	414
Total liabilities	$ 7,143	$ 9,774

INVENTORIES

6 Months Ended

Sep. 30, 2025

Inventory Disclosure [Abstract]

INVENTORIES

Inventories consist of the following (in thousands):


	September 30, 2025		March 31, 2025
Raw materials and supplies	$	85,923	$	54,761
Work in process	5,822		5,969
Finished goods	153,096		144,897
Total inventories	244,841		205,627
Less: Obsolescence reserve	(10,278)		(10,751)
Inventories, net	$	234,563	$	194,876

ORGANIZATION AND OPERATIONS AND SUMMARY OF ACCOUNTING POLICIES	6 Months Ended
	Sep. 30, 2025
Accounting Policies [Abstract]
ORGANIZATION AND OPERATIONS AND SUMMARY OF ACCOUNTING POLICIES	ORGANIZATION AND OPERATIONS AND SUMMARY OF ACCOUNTING POLICIES CSW Industrials, Inc. (the “Company,” “CSW,” “we,” “our” or “us”) is a diversified industrial growth company with a strategic focus on providing niche, value-added products in the end markets we serve. We operate in three business segments: Contractor Solutions, Specialized Reliability Solutions and Engineered Building Solutions. Our products include mechanical products for heating, ventilation, air conditioning and refrigeration (“HVAC/R”), plumbing products, grilles, registers and diffusers (“GRD”), building safety solutions and high-performance specialty lubricants and sealants. End markets that we serve include HVAC/R, architecturally-specified building products, plumbing, electrical, general industrial, energy, rail transportation and mining. Our manufacturing operations are concentrated in the United States (“U.S.”), Vietnam and Canada, and we have distribution operations in the U.S., Australia, Canada and the United Kingdom (“U.K.”). Our products are sold directly to end users or through designated channels in over 100 countries around the world, primarily including the U.S., Canada, the U.K. and Australia. Drawing on our innovative and proven technologies, we seek to deliver solutions primarily to contractors that place a premium on superior performance and reliability. We believe our brands are well-known in the specific end markets we serve and have a reputation for high quality. We rely on both organic growth and inorganic growth through acquisitions to provide an increasingly broad portfolio of performance optimizing solutions that meet our customers’ ever-changing needs. We have a successful record of making attractive, synergistic acquisitions in support of this objective, and we remain focused on identifying additional acquisition opportunities in our core end markets. Many of our products are used to protect the capital assets of our customers that are expensive to repair or replace and are critical to their operations. We have a source of recurring revenue from the maintenance, repair and overhaul and consumable nature of many of our products. We also provide some custom engineered products that strengthen and enhance our customer relationships. The reputation of our product portfolio is built on more than 100 well-respected brand names, such as AC Guard®, Air Sentry®, Aspen ManufacturingTM, Balco®, Cover Guard®, Deacon®, Dust Free®, Falcon Stainless®, Greco®, Jet-Lube®, Kopr-Kote®, Leak Freeze®, Metacaulk®, No. 5®, OilSafe®, PF WaterWorksTM, PSP ProductsTM, RectorSeal®, Safe-T-Switch®, Shoemaker Manufacturing®, Smoke Guard®, TRUaire® and Whitmore®. As of the date of this report, there continues to be uncertainty regarding overall macroeconomic conditions, including increased geopolitical tensions, risk of recessions, and the effects of potential trade policies including tariffs. In April 2025, the President of the United States issued an executive order to regulate imports by imposing country-specific tariffs on multiple nations around the world, including Vietnam and China, which are relevant to our business due to our manufacturing presence in Vietnam and our use of third-party manufacturing in China and other foreign countries. In addition, the United States imposed and/or reimposed certain commodity-specific tariffs, including tariffs on steel, aluminum and copper, which are used as inputs for some of our products. We have responded by negotiating cost reductions with certain suppliers, transitioning certain sources of supply, and by raising prices to our customers on certain products across our three segments to partially offset the impact. The current situation is dynamic, and the ultimate effect will be dependent on the magnitude and duration of the tariffs and the countries implicated, as well as our ability to mitigate their impact, where we continue to actively assess and implement mitigation options. On June 9, 2025, we transferred the listing of our common stock from the Nasdaq Global Select Market to the New York Stock Exchange. Our common stock now trades on the New York Stock Exchange under the stock symbol “CSW”. Basis of Presentation The consolidated financial statements included in this Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025 (“Quarterly Report”), include all revenues, costs, assets and liabilities directly attributable to CSW and have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The consolidated financial statements are for us and our consolidated subsidiaries, each of which is a wholly-owned subsidiary, except our non-controlling 50% investment in a variable interest entity (“VIE”) for which we have determined that we are the primary beneficiary and therefore have consolidated into our financial statements. All significant intercompany transactions have been eliminated in consolidation. The consolidated financial statements reflect all adjustments that are, in the opinion of management, necessary to present a fair statement of CSW’s financial position as of September 30, 2025, and the results of operations for the six month periods ended September 30, 2025 and 2024. All adjustments are of a normal, recurring nature. The year-end balance sheet data was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in CSW’s Annual Report on Form 10-K for the fiscal year ended March 31, 2025 (the “Annual Report”). Accounting Policies We have consistently applied the accounting policies described in our Annual Report in preparing these consolidated financial statements. Accounting Developments Pronouncements not yet implemented In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which provides qualitative and quantitative updates to the rate reconciliation and income taxes paid disclosures, among others, in order to enhance the transparency of income tax disclosures, including consistent categories and greater disaggregation of information in the rate reconciliation and disaggregation by jurisdiction of income taxes paid. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. This ASU should be applied prospectively; however, retrospective application is also permitted. This ASU will be effective for our Form 10-K for fiscal 2026. We are currently evaluating the impact this ASU may have on our financial statement disclosures. In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income (Topic 220): Expense Disaggregation Disclosures. Additionally, in January 2025, the FASB issued ASU 2025-01 to clarify the effective date of ASU 2024-03. This ASU provides guidance to expand disclosures related to the disaggregation of income statement expenses. Also, this ASU requires, in the notes to the financial statements, disclosure of specified information about certain costs and expenses which includes purchases of inventory, employee compensation, depreciation, and intangible asset amortization included in each relevant expense caption. ASU 2025-01 is effective for fiscal years beginning after December 15, 2026, and interim periods within annual reporting periods beginning after December 15, 2027, on a retrospective or prospective basis, with early adoption permitted. This ASU will be effective for our Form 10-K for fiscal 2028 and our Form 10-Q for the first quarter of 2029. We are currently evaluating the impact this ASU may have on our financial statement disclosures.

REVENUE RECOGNITION - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Accounts receivable	$ 159,368	$ 155,651	$ 135,300	$ 142,700

CONTINGENCIES	6 Months Ended
CONTINGENCIES	Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	CONTINGENCIES From time to time, we are involved in various claims and legal actions that arise in the ordinary course of business. There are no matters pending, whether individually or in the aggregate, that we currently believe have a reasonable possibility of having a material impact to our business, consolidated financial position, results of operations or cash flows. As of September 30, 2025, we were contingently liable in connection with a $1.3 million surety bond associated with our performance under an agreement with a logistics service provider. The letter of credit collateralizing this bond was issued under our Revolving Credit Facility and reduces the available borrowing capacity. The letter of credit will expire on November 11, 2025 and we have no plan to extend it. We have not recorded any liability for this contingency, as we believe the likelihood of having to perform under the letter of credit is remote.

ACQUISITIONS - Schedule of Aggregate Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands		5 Months Ended
	May 01, 2025	Sep. 30, 2025	Mar. 31, 2025
Business Combination [Line Items]
Measurement period adjustments, accounts receivable		$ (62)
Contingency Reserve		(400)
Other Long-Term Liabilities		(3,600)
Goodwill		365,308	$ 264,092
Aspen Manufacturing acquisition
Business Combination [Line Items]
Cash	$ 2,289	2,289
Accounts Receivable	15,253	15,191
Inventory	30,851	31,162
Measurement period, Inventory		311
Other Current Assets	150	150
Property, Plant and Equipment	7,916	7,916
Trade Name (indefinite life)		22,000
Customer Lists (useful life of 15 years)		165,000
Right-Of-Use Assets	11,855	11,855
Long-Term Indemnity Asset	400	400
Other Long-Term Assets	0	1,789
Measurement period adjustments, other long-term assets		1,789
Accounts Payable	(5,459)	(5,459)
Accrued and Other Current Liabilities	(8,943)	(9,000)
Measurement period adjustments, accrued and other current liabilities		(57)
Lease Liabilities - Short-Term	(1,019)	(1,019)
Lease Liabilities - Long-Term	(10,836)	(10,836)
Contingency Reserve	(400)
Other Long-Term Liabilities	(3,600)
Estimated fair value of net assets acquired	225,457	227,438
Measurement Period Adjustments, estimated fair value of net assets acquired		1,981
Goodwill	100,421	100,134
Measurement period adjustment, goodwill		(287)
Total Purchase Price	$ 325,878	327,572
Measurement period adjustment, total purchase price		$ 1,694
Aspen Manufacturing acquisition \| Customer Lists
Business Combination [Line Items]
Assets acquired, amortization period	15 years
Customer Lists (useful life of 15 years)	$ 165,000
Aspen Manufacturing acquisition \| Trade Names
Business Combination [Line Items]
Trade Name (indefinite life)	$ 22,000

CONSOLIDATION OF VARIABLE INTEREST ENTITIES AND REDEEMABLE NONCONTROLLING INTEREST - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
	Apr. 01, 2021	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Variable Interest Entity [Line Items]
Net income		$ 40,656	$ 40,925	$ 36,051	$ 38,591	$ 81,581	$ 74,644
Variable Interest Entity
Variable Interest Entity [Line Items]
Net income		$ 300				$ 800
Interest sold (in percent)	50.00%
Initiating member's equity interest (in percent)	90.00%
Option exercise period	2 years

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

CONTINGENCIES (Details) $ in Millions	Sep. 30, 2025 USD ($)
Surety Bond
Loss Contingencies [Line Items]
Contingent liability	$ 1.3

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Treasury Shares	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance at beginning of period at Mar. 31, 2024	$ 615,723	$ 164	$ (95,643)	$ 137,253	$ 583,075	$ (9,126)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	3,746			3,746
Stock activity under stock plans	(3,313)		(3,313)
Reissuance of treasury shares	4,159		1,211	2,948
Repurchase of common shares	(4,661)		(4,661)
Net income	38,591				38,591
Dividends	(3,262)			23	(3,285)
Other comprehensive income (loss), net of tax	(825)					(825)
Balance at end of period at Jun. 30, 2024	650,158	164	(102,406)	143,970	618,381	(9,951)
Balance at beginning of period at Mar. 31, 2024	615,723	164	(95,643)	137,253	583,075	(9,126)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	74,644
Other comprehensive income (loss), net of tax	71
Balance at end of period at Sep. 30, 2024	1,030,166	177	(106,636)	494,535	651,145	(9,055)
Balance at beginning of period at Jun. 30, 2024	650,158	164	(102,406)	143,970	618,381	(9,951)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	3,145			3,145
Repurchase of common shares	(4,230)		(4,230)
Net income	36,051				36,051
Dividends	(3,261)			26	(3,287)
Equity issuance	347,407	13		347,394
Other comprehensive income (loss), net of tax	896					896
Balance at end of period at Sep. 30, 2024	1,030,166	177	(106,636)	494,535	651,145	(9,055)
Balance at beginning of period at Mar. 31, 2025	1,072,246	177	(122,125)	501,286	705,035	(12,127)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	4,037			4,037
Stock activity under stock plans	(4,428)	1	(4,429)
Reissuance of treasury shares	4,859		1,105	3,754
Repurchase of common shares	(4,662)		(4,662)
Net income	40,925				40,925
Dividends	(4,533)			23	(4,556)
Other comprehensive income (loss), net of tax	1,384					1,384
Balance at end of period at Jun. 30, 2025	1,109,828	178	(130,111)	509,100	741,404	(10,743)
Balance at beginning of period at Mar. 31, 2025	1,072,246	177	(122,125)	501,286	705,035	(12,127)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	81,581
Other comprehensive income (loss), net of tax	132
Balance at end of period at Sep. 30, 2025	1,129,967	178	(148,431)	512,719	777,496	(11,995)
Balance at beginning of period at Jun. 30, 2025	1,109,828	178	(130,111)	509,100	741,404	(10,743)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	3,591			3,591
Repurchase of common shares	(18,320)		(18,320)
Net income	40,656				40,656
Dividends	(4,536)			28	(4,564)
Other comprehensive income (loss), net of tax	(1,252)					(1,252)
Balance at end of period at Sep. 30, 2025	$ 1,129,967	$ 178	$ (148,431)	$ 512,719	$ 777,496	$ (11,995)

INVENTORIES (Tables)

6 Months Ended

Sep. 30, 2025

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consist of the following (in thousands):


	September 30, 2025		March 31, 2025
Raw materials and supplies	$	85,923	$	54,761
Work in process	5,822		5,969
Finished goods	153,096		144,897
Total inventories	244,841		205,627
Less: Obsolescence reserve	(10,278)		(10,751)
Inventories, net	$	234,563	$	194,876

LEASES - Schedule of Leases Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Operating Lease Assets and Liabilities
Right-of-use assets, net	$ 68,292	$ 62,061
Short-term lease liabilities	12,312	11,244
Long-term lease liabilities	63,144	58,120
Total operating lease liabilities	$ 75,456	$ 69,364
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued and other current liabilities	Accrued and other current liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities

LONG-TERM DEBT - Additional Information (Details) - USD ($)			6 Months Ended
	May 02, 2025	May 18, 2021	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025	Feb. 07, 2023
Debt Instrument [Line Items]
Borrowings on line of credit			$ 138,394,000	$ 32,723,000
Repayments of long-term debt			78,394,000	$ 198,723,000
Repayments of lines of credit			78,400,000
Interest Rate Swap
Debt Instrument [Line Items]
Amount of hedged item			100,000,000			$ 100,000,000
Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 250,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Percentage of voting equity interests in first-tier foreign subsidiaries (in percent)	0.65	0.65
Long term debt			60,000,000		$ 0
Revolving Credit Facility \| Federal Funds Effective Rate
Debt Instrument [Line Items]
Spread on interest rate (in percent)	0.50%	0.50%
Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Spread on interest rate (in percent)	1.00%	1.00%
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 700,000,000.0	$ 500,000,000
Line of credit facility, accordion feature		$ 50,000,000
Debt discount and issuance costs	$ 2,800,000
Long term debt			60,000,000.0		0.0
Line of credit facility, remaining borrowing capacity			$ 638,700,000		$ 498,700,000
Maximum leverage ratio		3.00
Temporary increase for maximum leverage ratio		3.75
Duration of temporary increase for maximum leverage ratio		18 months
Minimum fixed charge coverage ratio		3.00
Revolving Credit Facility \| Line of Credit \| Minimum
Debt Instrument [Line Items]
Commitment fee percentage (in percent)	0.15%	0.15%
Revolving Credit Facility \| Line of Credit \| Minimum \| Prime Rate
Debt Instrument [Line Items]
Spread on interest rate (in percent)	0.25%	0.25%
Revolving Credit Facility \| Line of Credit \| Minimum \| London Interbank Offered Rate
Debt Instrument [Line Items]
Spread on interest rate (in percent)	1.25%	1.25%
Revolving Credit Facility \| Line of Credit \| Maximum
Debt Instrument [Line Items]
Commitment fee percentage (in percent)	0.40%	0.40%
Revolving Credit Facility \| Line of Credit \| Maximum \| Prime Rate
Debt Instrument [Line Items]
Spread on interest rate (in percent)	1.50%	1.50%
Revolving Credit Facility \| Line of Credit \| Maximum \| London Interbank Offered Rate
Debt Instrument [Line Items]
Spread on interest rate (in percent)	2.50%	2.50%
Letter of Credit \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 30,000,000.0	$ 25,000,000
Swingline Loans \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 15,000,000.0	$ 10,000,000

FAIR VALUE MEASUREMENTS

6 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

The carrying amounts of cash, accounts receivable, net and accounts payable approximate their fair values at September 30, 2025 and March 31, 2025 due to their short-term nature. Cash equivalents generally consist of money market funds invested with a reputable and highly diversified global bank in instruments issued or guaranteed by the U.S. Treasury. The fair value of these cash equivalents is based on quoted market price, which is a Level I input. The carrying value of our debt (discussed in Note 7) approximates fair value as it bears interest at variable rates. The fair value of the interest rate swap contract (as discussed in Note 9) is determined using Level II inputs.

The long-term investments with no readily determinable fair value are measured using the alternative for fair value and the investment's carrying value is reported at cost, adjusted for impairments or any observable price changes in ordinary transactions with identical or similar investments. As of September 30, 2025 and March 31, 2025, the long-term investments reported in the balance sheets were $2.5 million and $2.5 million, respectively.

The redeemable noncontrolling interest is recorded at the higher of the redemption value or carrying value each reporting period. The redemption value of the redeemable noncontrolling interest is estimated using a discounted cash flow analysis, which requires management judgment with respect to future revenue, operating margins, growth rates and discount rates and is classified as Level III under the fair value hierarchy. The redemption value of the redeemable noncontrolling interest is discussed in Note 3.

The fair value of the contingent consideration liability related to acquisitions is determined using either a scenario-based analysis on forecasted future results or an option pricing model simulation that determines an average projected payment value across numerous iterations. The contingent consideration liability is recorded at fair value on the acquisition date and is remeasured quarterly based on the then assessed fair value. The increases or decreases in the fair value of the contingent consideration can result from changes in future operations, forecasted revenue and assumed discount rates. The fair value measurement is based on significant inputs that are not observable in the market and is classified as Level III under the fair value hierarchy. As of September 30, 2025 and March 31, 2025, the contingent consideration liabilities, reported in our consolidated balance sheets in accrued and other current liabilities and other long-term liabilities, were $19.7 million and $24.4 million, respectively.

The following table presents the fair values of the Company's assets and liabilities measured on a recurring basis:


	September 30, 2025				March 31, 2025
(in thousands)	Carrying Value		Fair Value		Carrying Value		Fair Value



Unobservable Inputs (Level III)
Acquisition-related contingent consideration liabilities	$	19,735	$	19,735	$	24,385	$	24,385

The following table presents the changes in the estimated fair values of the Company's contingent consideration liabilities measured using significant unobservable inputs (Level 3):


(in thousands)	September 30, 2025		March 31, 2025
Balance at beginning of the year:	$	24,385	$	7,445
Cash payments	(4,650)		(160)
Change in fair value of contingent consideration liabilities	—		2,100
Additions	—		15,000
Ending balance	$	19,735	$	24,385

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

LONG-TERM DEBT - Schedule of Long-Term Debt (Details) - Revolving Credit Facility - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Debt Instrument [Line Items]
Interest rate	5.41%
Long term debt	$ 60,000	$ 0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table presents the fair values of the Company's assets and liabilities measured on a recurring basis:


	September 30, 2025				March 31, 2025
(in thousands)	Carrying Value		Fair Value		Carrying Value		Fair Value



Unobservable Inputs (Level III)
Acquisition-related contingent consideration liabilities	$	19,735	$	19,735	$	24,385	$	24,385

Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

The following table presents the changes in the estimated fair values of the Company's contingent consideration liabilities measured using significant unobservable inputs (Level 3):


(in thousands)	September 30, 2025		March 31, 2025
Balance at beginning of the year:	$	24,385	$	7,445
Cash payments	(4,650)		(160)
Change in fair value of contingent consideration liabilities	—		2,100
Additions	—		15,000
Ending balance	$	19,735	$	24,385

LEASES - Schedule of Supplemental Cash Flow (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 8,034	$ 6,117
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 868	$ 20,089

SHAREHOLDERS' EQUITY - Schedule of Stockholders Equity (Details) - shares	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of the year (in shares)	1,027,000
Ending balance (in shares)	1,115,000
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of the year (in shares)	17,809,590	16,465,776
Reissuance of treasury shares (in shares)	0	0
Share repurchases (in shares)	0	0
Ending balance (in shares)	17,851,584	17,771,489
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of the year (in shares)	1,026,941	952,394
Reissuance of treasury shares (in shares)	(15,539)	(17,186)
Share repurchases (in shares)	88,450	32,450
Ending balance (in shares)	1,114,818	981,941
Vesting of performance shares and restricted stock units \| Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of performance shares and restricted stock units (in shares)	40,167	39,064
Vesting of performance shares and restricted stock units \| Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of performance shares and restricted stock units (in shares)	14,966	14,283
Restricted Stock \| Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards activities (in shares)	1,827	1,649
Restricted Stock \| Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards activities (in shares)	0	0
Equity \| Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity issuance (in shares)	0	1,265,000
Equity \| Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity issuance (in shares)	0	0

EARNINGS PER SHARE (Tables)

6 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

Schedule of Reconciliation of Earnings Per Share


	Three Months Ended September 30,				Six Months Ended September 30,
	2025		2024		2025		2024
Net income	$	40,814	$	36,621	$	81,984	$	75,472
Less: Net income attributable to redeemable noncontrolling interest	(158)		(570)		(403)		(828)
Net income attributable to CSW Industrials, Inc.	$	40,656	$	36,051	$	81,581	$	74,644

Weighted average shares:
Common stock	16,700		15,765		16,710		15,599
Participating securities	85		101		86		102
Denominator for basic earnings per common share	16,785		15,866		16,796		15,701
Potentially dilutive securities	57		75		56		69
Denominator for diluted earnings per common share	16,842		15,941		16,852		15,770

Net income per share attributable to CSW Industrials, Inc.:
Basic	$	2.42	$	2.27	$	4.86	$	4.75
Diluted	$	2.41	$	2.26	$	4.84	$	4.73

FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Acquisition-related contingent consideration liabilities	$ 19,700	$ 24,400
Unobservable Inputs (Level III ) \| Carrying Value \| Recurring
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Acquisition-related contingent consideration liabilities	19,735	24,385
Unobservable Inputs (Level III ) \| Fair Value \| Recurring
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Acquisition-related contingent consideration liabilities	$ 19,735	$ 24,385

REVENUE RECOGNITION - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Net revenues	$ 276,951	$ 227,926	$ 540,597	$ 454,103
Build-to-order
Disaggregation of Revenue [Line Items]
Net revenues	28,087	28,655	56,513	55,832
Book-and-ship
Disaggregation of Revenue [Line Items]
Net revenues	248,864	199,271	484,084	398,271
Contractor Solutions
Disaggregation of Revenue [Line Items]
Net revenues	206,278	156,764	401,253	315,302
Contractor Solutions \| Build-to-order
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Contractor Solutions \| Book-and-ship
Disaggregation of Revenue [Line Items]
Net revenues	206,278	156,764	401,253	315,302
Specialized Reliability Solutions
Disaggregation of Revenue [Line Items]
Net revenues	38,764	38,489	75,539	75,235
Specialized Reliability Solutions \| Build-to-order
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Specialized Reliability Solutions \| Book-and-ship
Disaggregation of Revenue [Line Items]
Net revenues	38,764	38,489	75,539	75,235
Engineered Building Solutions
Disaggregation of Revenue [Line Items]
Net revenues	31,909	32,673	63,805	63,566
Engineered Building Solutions \| Build-to-order
Disaggregation of Revenue [Line Items]
Net revenues	28,087	28,655	56,513	55,832
Engineered Building Solutions \| Book-and-ship
Disaggregation of Revenue [Line Items]
Net revenues	$ 3,822	$ 4,018	$ 7,292	$ 7,734

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

GOODWILL AND INTANGIBLE ASSETS - Schedule of Estimated Future Amortization (Details) $ in Thousands	Sep. 30, 2025 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2026	$ 19,157
2027	37,104
2028	36,712
2029	36,636
2030	36,570
Thereafter	267,036
Total	$ 433,215

LONG-TERM DEBT (Tables)

6 Months Ended

Sep. 30, 2025

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt consists of the following (in thousands):


	September 30, 2025		March 31, 2025
Revolving Credit Facility, interest rate of 5.41% (a) and N/A (b)	$	60,000	$	—

(a) Represents the interest rate effective on September 30, 2025.

(b) Interest rate effective on March 31, 2025 was not applicable due to there being no outstanding balance under the Revolving Credit Facility.

ACQUISITIONS - Schedule of Unaudited Proforma Financial Information (Details) - Aspen Manufacturing acquisition - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combination [Line Items]
Revenues, net	$ 276,951	$ 265,843	$ 551,040	$ 527,058
Net income attributable to CSW Industrials, Inc.	$ 41,362	$ 38,434	$ 84,625	$ 78,503
Net income per share attributable to CSW Industrials, Inc.
Basic (in USD per share)	$ 2.46	$ 2.42	$ 5.04	$ 5.00
Diluted (in USD per share)	$ 2.46	$ 2.41	$ 5.02	$ 4.98

- Definition

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+ Details