CSW INDUSTRIALS, INC.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934

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Preliminary Proxy Statement

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Definitive Proxy Statement

Definitive Additional Materials

CSW INDUSTRIALS, INC.

(Name of Registrant as Specified in its Charter)

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Dear Fellow Shareholder:

On behalf of your Board of Directors, I am pleased to invite you to attend CSW Industrials’ 2024 Annual Meeting of Shareholders. This year’s Proxy Statement highlights our impressive accomplishments in fiscal 2024 and presents the matters for which we are seeking your approval at the 2024 Annual Meeting.

From our inception, we have worked to create a distinctive, employee-focused culture, driven by the conviction that a strong culture forms the foundation upon which enduring success can be built. As we continued to demonstrate in fiscal 2024, we remain committed to a culture of diversity, inclusion, and respect, characterized by recruiting and retaining great talent, offering rewarding careers with the opportunity for a secure and dignified retirement, and recognizing team members who excel. Our team members drive our success daily because they understand thathow we succeed matters.

In fiscal 2024, we delivered record results across the board, highlighted by organic and inorganic growth, expanded margins, and robust cash flow. While certain key end markets were challenged throughout the year, we continued to outperform the markets we serve and delivered our seventh consecutive year of increases in revenue and earnings before interest, taxes, depreciation and amortization (“EBITDA”). Moreover, we again executed on all elements of our capital allocation strategy, efficiently allocating capital on a risk-adjusted returns basis. This ultimately resulted in record growth in shareholder value.

We believe this year’s Proxy Statement continues to demonstrate our consistent commitment to sound governance practices and enhanced disclosure and transparency. We are pleased to share this important information with you.

Your vote is very important to us and to our business, so I encourage you to vote before the meeting. You may vote online, by telephone, or by signing and returning your proxy card by mail, so that your shares will be represented and voted at the meeting. You can find instructions on how to vote on page 4.

I hope that you participate in the meeting. Thank you in advance for voting and for your continued support of CSW Industrials.

Very truly yours,

Joseph B. Armes Chairman, CEO and President