UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ☒ EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ☐ EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-34726 LYONDELLBASELL INDUSTRIES N.V. (Exact name of registrant as specified in its charter) Netherlands 98-0646235 (State or other jur ...