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): April 25, 2025 GATX Corporation (Exact name of registrant as specified in its charter) New York   1-2328   36-1124040 (State or other jurisdiction of incorporation)   (Commission File Number)   (IRS Employer Identification No.) 233 South Wacker Drive Chicago , Illinois 60606 -7147 (Address of principal executive offices, including zip code) ( 312 ) 621-6200 (Registrant’s telephone number, including area code)  __________________________ 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 communication 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(s) Name of Each Exchange on Which Registered Common Stock GATX New York Stock Exchange Chicago 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 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). 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 GATX Corporation (the “Company”) held its 2025 annual meeting of shareholders (the “Annual Meeting”) on April 25, 2025. Of the 35,675,897 shares outstanding on the record date and entitled to vote at the Annual Meeting, 33,927,179 shares were present in person or by proxy, constituting a quorum of 95.1 percent. At the Annual Meeting, the shareholders of the Company considered and voted upon the following three proposals, each of which is described in detail in the Company’s Proxy Statement for the Annual Meeting (the “Proxy Statement”). The results of each matter voted upon are as follows: Proposal 1 - Election of Directors Each of the eight individuals named below was elected to serve on the Company's Board of Directors until the Company's 2026 annual meeting of shareholders and until his or her successor shall have been duly elected and qualified, or until his or her earlier death or resignation, by the following vote: Name For Against Abstain Broker Non-Votes Diane M. Aigotti 32,628,839 71,038 19,349 1,207,953 Anne L. Arvia 30,837,902 1,865,161 16,163 1,207,953 Shelley J. Bausch 32,568,452 125,256 25,518 1,207,953 John M. Holmes 32,638,392 61,274 19,560 1,207,953 Robert C. Lyons 31,045,028 1,656,952 17,246 1,207,953 James B. Ream 30,944,828 1,754,859 19,539 1,207,953 Adam L. Stanley 32,559,202 130,358 29,666 1,207,953 Paul G. Yovovich 30,906,557 1,795,966 16,703 1,207,953 Proposal 2 - Advisory Resolution on Executive Compensation The shareholders approved, on a non-binding advisory basis, the compensation of the Company’s named executive officers as disclosed in the Compensation Discussion and Analysis section, executive compensation tables and accompanying narrative discussions contained in the Proxy Statement, by the following vote: For Against Abstain Broker Non-Votes 32,180,850 458,662 79,714 1,207,953 Proposal 3 - Ratification of the Appointment of Independent Registered Public Accounting Firm The shareholders ratified the appointment of Ernst & Young LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2025, by the following vote: For Against Abstain Broker Non-Votes 32,148,108 1,715,257 63,814 — SIGNATURE 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.   GATX CORPORATION (Registrant) /s/ Brian L. Glassberg Brian L. Glassberg Executive Vice President, General Counsel and Secretary April 30, 2025