BUSINESS AND BASIS OF PRESENTATION	3 Months Ended
Mar. 31, 2026
BUSINESS AND BASIS OF PRESENTATION
BUSINESS AND BASIS OF PRESENTATION	NOTE 1—BUSINESS AND BASIS OF PRESENTATION Description of the business: Select Water Solutions, Inc. (“we,” “Select Inc.,” “Select” or the “Company”), formerly Select Energy Services, Inc., was incorporated as a Delaware corporation on November 21, 2016. On May 8, 2023, Select Energy Services, Inc.’s Fifth Amended and Restated Certificate of Incorporation became effective upon filing with the Secretary of State of the State of Delaware which, among other things, changed the name of the Company from Select Energy Services, Inc. to Select Water Solutions, Inc. to reflect its strategic focus as a water-focused company. We retained our stock ticker “WTTR” trading on the New York Stock Exchange and NYSE Texas, Inc. The Company is a holding company whose sole material asset consists of common units (“SES Holdings LLC Units”) in SES Holdings, LLC (“SES Holdings”). We are a leading provider of sustainable water-management solutions to the energy industry in the United States (“U.S.”). As a leader in the water solutions industry, we place the utmost importance on safe, environmentally responsible management of oilfield water throughout the lifecycle of a well. Additionally, we believe that responsibly managing water resources through our operations to help conserve and protect the environment in the communities in which we operate is paramount to our continued success. Common Stock Offering: In February 2026, the Company completed an underwritten public offering of 15,784,315 shares of Class A common stock at a public offering price of $12.75 per share, consisting of 13,725,491 shares issued in the base offering and 2,058,824 shares issued upon the full exercise of the underwriters’ overallotment option. The offering generated aggregate gross proceeds of approximately $201.3 million and net proceeds of approximately $192.2 million, after underwriting discounts and commissions and before other offering expenses. In connection with the offering, Select Inc. contributed the net proceeds of the offering to SES Holdings in exchange for a number of common units of SES Holdings equal to the number of shares of Class A common stock issued in the underwritten public offering. Class A and Class B common stock: As of March 31, 2026, the Company had both Class A and Class B common shares issued and outstanding. Holders of shares of our Class A common stock, par value $0.01 per share (“Class A common stock”) and Class B common stock, par value $0.01 per share (“Class B common stock”) are entitled to one vote per share and vote together as a single class on all matters presented to our stockholders for their vote or approval. Exchange rights: Under the Eighth Amended and Restated Limited Liability Company Agreement of SES Holdings (the “SES Holdings LLC Agreement”), SES Legacy Holdings LLC (“Legacy Owner Holdco”) and its permitted transferees have the right (an “Exchange Right”) to cause SES Holdings to acquire all or a portion of its SES Holdings LLC Units for, at SES Holdings’ election, (i) shares of Class A common stock at an exchange ratio of one share of Class A common stock for each SES Holdings LLC Unit exchanged, subject to conversion rate adjustments for stock splits, stock dividends, reclassification and other similar transactions or (ii) cash in an amount equal to the Cash Election Value (as defined within the SES Holdings LLC Agreement) of such Class A common stock. Alternatively, upon the exercise of any Exchange Right, Select Inc. has the right (the “Call Right”) to acquire the tendered SES Holdings LLC Units from the exchanging unitholder for, at its election, (i) the number of shares of Class A common stock the exchanging unitholder would have received under the Exchange Right or (ii) cash in an amount equal to the Cash Election Value of such Class A common stock. In connection with any exchange of SES Holdings LLC Units pursuant to an Exchange Right or Call Right, the corresponding number of shares of Class B common stock will be cancelled. Basis of presentation: The accompanying unaudited interim consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the U.S. (“GAAP”) and pursuant to the rules and regulations of the SEC. These unaudited interim consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for annual financial statements prepared in conformity with GAAP. This Quarterly Report relates to the three months ended March 31, 2026 (the “Current Quarter”) and the three months ended March 31, 2025 (the “Prior Quarter”). The Company’s Annual Report on Form 10-K for the year ended December 31, 2025 (the “2025 Form 10-K”), filed with the SEC on February 18, 2026, includes certain definitions and a summary of significant accounting policies and should be read in conjunction with this Quarterly Report. All material adjustments (consisting solely of normal recurring adjustments) which, in the opinion of management, are necessary for a fair statement of the results for the interim periods have been reflected. The results for the Current Quarter may not be indicative of the results to be expected for the full year. The unaudited interim consolidated financial statements include the Company’s accounts and all of its majority-owned or controlled subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

BUSINESS AND BASIS OF PRESENTATION

3 Months Ended

Mar. 31, 2026

NOTE 1—BUSINESS AND BASIS OF PRESENTATION

Description of the business: Select Water Solutions, Inc. (“we,” “Select Inc.,” “Select” or the “Company”), formerly Select Energy Services, Inc., was incorporated as a Delaware corporation on November 21, 2016. On May 8, 2023, Select Energy Services, Inc.’s Fifth Amended and Restated Certificate of Incorporation became effective upon filing with the Secretary of State of the State of Delaware which, among other things, changed the name of the Company from Select Energy Services, Inc. to Select Water Solutions, Inc. to reflect its strategic focus as a water-focused company. We retained our stock ticker “WTTR” trading on the New York Stock Exchange and NYSE Texas, Inc. The Company is a holding company whose sole material asset consists of common units (“SES Holdings LLC Units”) in SES Holdings, LLC (“SES Holdings”).

We are a leading provider of sustainable water-management solutions to the energy industry in the United States (“U.S.”). As a leader in the water solutions industry, we place the utmost importance on safe, environmentally responsible management of oilfield water throughout the lifecycle of a well. Additionally, we believe that responsibly managing water resources through our operations to help conserve and protect the environment in the communities in which we operate is paramount to our continued success.

Common Stock Offering: In February 2026, the Company completed an underwritten public offering of 15,784,315 shares of Class A common stock at a public offering price of $12.75 per share, consisting of 13,725,491 shares issued in the base offering and 2,058,824 shares issued upon the full exercise of the underwriters’ overallotment option. The offering generated aggregate gross proceeds of approximately $201.3 million and net proceeds of approximately $192.2 million, after underwriting discounts and commissions and before other offering expenses. In connection with the offering, Select Inc. contributed the net proceeds of the offering to SES Holdings in exchange for a number of common units of SES Holdings equal to the number of shares of Class A common stock issued in the underwritten public offering.

Class A and Class B common stock: As of March 31, 2026, the Company had both Class A and Class B common shares issued and outstanding. Holders of shares of our Class A common stock, par value $0.01 per share (“Class A common stock”) and Class B common stock, par value $0.01 per share (“Class B common stock”) are entitled to one vote per share and vote together as a single class on all matters presented to our stockholders for their vote or approval.

Exchange rights: Under the Eighth Amended and Restated Limited Liability Company Agreement of SES Holdings (the “SES Holdings LLC Agreement”), SES Legacy Holdings LLC (“Legacy Owner Holdco”) and its permitted transferees have the right (an “Exchange Right”) to cause SES Holdings to acquire all or a portion of its SES Holdings LLC Units for, at SES Holdings’ election, (i) shares of Class A common stock at an exchange ratio of one share of Class A common stock for each SES Holdings LLC Unit exchanged, subject to conversion rate adjustments for stock splits, stock dividends, reclassification and other similar transactions or (ii) cash in an amount equal to the Cash Election Value (as defined within the SES Holdings LLC Agreement) of such Class A common stock. Alternatively, upon the exercise of any Exchange Right, Select Inc. has the right (the “Call Right”) to acquire the tendered SES Holdings LLC Units from the exchanging unitholder for, at its election, (i) the number of shares of Class A common stock the exchanging unitholder would have received under the Exchange Right or (ii) cash in an amount equal to the Cash Election Value of such Class A common stock. In connection with any exchange of SES Holdings LLC Units pursuant to an Exchange Right or Call Right, the corresponding number of shares of Class B common stock will be cancelled.

Basis of presentation: The accompanying unaudited interim consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the U.S. (“GAAP”) and pursuant to the rules and regulations of the SEC. These unaudited interim consolidated financial statements have been prepared in

accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for annual financial statements prepared in conformity with GAAP.

This Quarterly Report relates to the three months ended March 31, 2026 (the “Current Quarter”) and the three months ended March 31, 2025 (the “Prior Quarter”). The Company’s Annual Report on Form 10-K for the year ended December 31, 2025 (the “2025 Form 10-K”), filed with the SEC on February 18, 2026, includes certain definitions and a summary of significant accounting policies and should be read in conjunction with this Quarterly Report. All material adjustments (consisting solely of normal recurring adjustments) which, in the opinion of management, are necessary for a fair statement of the results for the interim periods have been reflected. The results for the Current Quarter may not be indicative of the results to be expected for the full year.

The unaudited interim consolidated financial statements include the Company’s accounts and all of its majority-owned or controlled subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.