X0202 SCHEDULE 13D/A 0001744269 XXXXXXXX LIVE 3 Common Stock, par value $0.10 per share 03/26/2026 false 0000060714 502160104 LSB Industries, Inc.

3503 NW 63rd Street Suite 500 Oklahoma City OK 73116

Todd L. Boehly 1-800-224-6469 701 Brickell Avenue Suite 860 Miami FL 33131 0001744269 N Todd L. Boehly OO N X1 10417768 0 10417768 0 10417768 N 14.5 IN Relating to Items 7, 9 and 11 of this page: Represents 10,374,334 shares of common stock, par value $0.10 per share (the "Common Stock"), of LSB Industries, Inc., a Delaware corporation (the "Issuer"), directly held by TLB-LSB, LLC, of which Todd L. Boehly is the sole member, and 43,434 shares of Common Stock directly held by a limited liability company over which Todd L. Boehly may be deemed to have investment control. Each of Todd L. Boehly and TLB-LSB, LLC disclaims beneficial ownership of the shares described above except to the extent of his or its pecuniary interest therein. Relating to Item 13 of this page: Calculated based on 71,846,842 shares of Common Stock of the Issuer outstanding as of February 20, 2026, as disclosed in the Issuer's Form 10-K filed on February 26, 2026 with the Securities and Exchange Commission (the "SEC"). 0002000541 N TLB-LSB, LLC OO N DE 10374334 0 10374334 0 10374334 N 14.4 OO Relating to Item 13 of this page: Calculated based on 71,846,842 shares of Common Stock of the Issuer outstanding as of February 20, 2026, as disclosed in the Issuer's Form 10-K filed on February 26, 2026 with the SEC. Common Stock, par value $0.10 per share LSB Industries, Inc. 3503 NW 63rd Street Suite 500 Oklahoma City OK 73116 Explanatory Note: This statement on Schedule 13D represents Amendment No. 3 to the Schedule 13D (the "Original Schedule 13D") originally filed with the SEC on August 16, 2022 and amended by Amendment No. 1 to the Schedule 13D (the "Amendment No. 1"), filed with the SEC on November 10, 2022, and Amendment No. 2 to the Schedule 13D (the "Amendment No. 1"), filed with the SEC on November 14, 2023. Each of the Original Schedule 13D, Amendment No. 1, Amendment No. 2 and this Amendment No. 3 include a separate definition for the term "Reporting Person" or "Reporting Persons." For the avoidance of doubt, for each of these filings, the specific definition of "Reporting Person" or "Reporting Persons" in each particular filing should be applied to that filing in particular. This statement is being filed by Todd L. Boehly ("TLB") and TLB-LSB, LLC, a Delaware limited liability company ("TLB-LSB" and, together with TLB, the "Reporting Persons"). The Sole Member of TLB-LSB is TLB. The address of the principal business and principal office of the Reporting Persons is 701 Brickell Avenue, Suite 860, Miami, Florida 33131. During the last five years, none of the Reporting Persons has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). During the last five years, none of the Reporting Persons was a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violations with respect to such laws. TLB - United States of America TLB-LSB, LLC - Delaware, United States of America Based upon the Issuer's Form 10-K filed on February 26, 2026 with the SEC, there were 71,846,842 shares of Common Stock outstanding as of February 20, 2026. TLB-LSB beneficially owns 10,374,334 shares of Common Stock and a limited liability company over which TLB may be deemed to have investment control owns 43,434 shares of Common Stock, which together represents approximately 14.5% of the outstanding Common Stock. The information contained in Item 5(a) is hereby incorporated by reference. Effective March 26, 2026, TLB-LSB sold 4,889,159 shares of Common Stock at a price of $14.85 per share of Common Stock, resulting in a total of 10,374,334 shares of Common Stock being held by TLB-LSB and 43,434 shares of Common Stock being held by a limited liability company over which TLB may be deemed to have investment control. Exhibit 99.1 Agreement regarding joint filing of Schedule 13D Todd L. Boehly /s/ Todd L. Boehly 03/30/2026 TLB-LSB, LLC /s/ Todd L. Boehly 03/30/2026