Shareholder Vote

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2026 SOUTHWEST AIRLINES CO. (Exact name of registrant as specified in its charter) Texas 1-7259 74-1563240 (State or other jurisdiction (Commission (I.R.S. Employer of incorporation) File Number) Identification No.) P. O. Box 36611 Dallas, Texas 75235-1611 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code:    ( 214 ) 792-4000 Not Applicable Former name or former address, if changed since last report Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐     Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐     Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐     Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐     Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol Name of each exchange on which registered Common Stock ($1.00 par value) LUV New York Stock Exchange Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2). Emerging growth company      ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.     ☐ Item 5.07    Submission of Matters to a Vote of Security Holders. (a) The Annual Meeting of Shareholders of Southwest Airlines Co. (the “Company”) was held on Thursday, May 7, 2026 . (b) The following matters were voted on by the Company’s Shareholders at the Annual Meeting and received the following votes: 1. Proposal 1 – Election of eleven Directors for terms expiring at the 2027 Annual Meeting of Shareholders: NOMINEE VOTES FOR VOTES AGAINST ABSTENTIONS BROKER NON-VOTES Lisa M. Atherton 344,758,477 34,136,329 566,052 62,994,310 Pierre R. Breber 370,998,884 7,870,553 591,421 62,994,310 Douglas H. Brooks 361,664,157 17,194,293 602,408 62,994,310 Sarah E. Feinberg 358,999,977 19,751,763 709,118 62,994,310 Robert L. Fornaro 366,920,758 12,042,125 497,975 62,994,310 Rakesh Gangwal 344,388,346 34,474,149 598,363 62,994,310 David J. Grissen 371,447,254 7,451,577 562,027 62,994,310 David P. Hess 366,280,441 12,466,256 714,161 62,994,310 Robert E. Jordan 367,197,900 11,703,974 558,984 62,994,310 Christopher P. Reynolds 230,555,780 145,944,626 2,960,452 62,994,310 Patricia A. Watson 349,537,426 29,321,846 601,586 62,994,310 2. Proposal 2 – An advisory (non-binding) vote to approve the compensation of the Company’s named executive officers: VOTES FOR VOTES AGAINST ABSTENTIONS BROKER NON-VOTES 364,384,778 13,450,799 1,625,281 62,994,310 3. Proposal 3 – A proposal to ratify the selection of Ernst & Young LLP as the Company’s independent auditors for the fiscal year ending December 31, 2026: VOTES FOR VOTES AGAINST ABSTENTIONS BROKER NON-VOTES 430,433,346 10,943,832 1,077,990 0 (c) Not applicable. (d) Not applicable. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. SOUTHWEST AIRLINES CO. Date: May 11, 2026 By: /s/ Jeff Novota Jeff Novota Senior Vice President Chief Legal Officer & Corporate Secretary