Select Water Solutions, Inc.

Item 8.01. Other Events. On October 14, 2026, Select Water Holdings LLC (the “Issuer”), a subsidiary of Select Water Solutions, Inc. (the “Company”), and the subsidiary guarantors named therein (the “Subsidiary Guarantors”) entered into a purchase agreement (the “Purchase Agreement”) with J.P. Morgan Securities LLC and BofA Securities, Inc., as representatives of the several initial purchasers named therein (collectively, the “Initial Purchasers”), pursuant to which the Issuer agreed to sell to the Initial Purchasers $900 million aggregate principal amount of the Issuer’s 7.625% Senior Notes due 2034 (the “Notes”) in a private placement (the “Offering”) conducted pursuant to Rule 144A and Regulation S under the Securities Act of 1933, as amended. The Offering was upsized from an initial offering size of $800 million aggregate principal amount of the Notes. The Notes will mature on November 1, 2034. The Notes will be issued at par for total net proceeds of approximately $882.6 million, after deducting the Initial Purchasers’ discount and estimated offering expenses. The closing of the issuance of the Notes is expected to occur on October 21, 2026, subject to customary closing conditions. The Issuer intends to use the net proceeds from the Offering, together with cash on hand, (i) to fund a portion of the cash consideration for the previously announced acquisition of Pilot Water Solutions LLC (the “Pilot Water Acquisition”), (ii) to repay the outstanding obligations under its term loan facility in full and repay any outstanding loans (together with accrued and unpaid interest thereon) under its existing revolving credit facility, (iii) to pay the fees, premiums, expenses and costs incurred in connection with the foregoing and the transactions related thereto and (iv) for general corporate purposes and working capital. The Offering is not contingent on the consummation of the Pilot Water Acquisition. The Purchase Agreement contains customary representations, warranties and agreements of the Company, the Issuer and the Subsidiary Guarantors and customary conditions to closing, indemnification rights, obligations of the parties and termination provisions. On October 14, 2026, the Company issued a press release announcing the pricing of the Notes. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.