GATX shareholders elect all nine director nominees, approve say-on-pay, ratify EY as auditor

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 32,049,856 795,618 71,269 1,176,353

Proposal 1 - Election of Directors Each of the nine individuals named below was elected to serve on the Company's Board of Directors until the Company's 2025 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 32,817,021 78,234 21,488 1,176,353 Anne L. Arvia 31,155,924 1,736,584 24,335 1,176,353 Shelley J. Bausch 32,857,278 40,033 19,432 1,176,353 John M. Holmes 32,862,674 36,305 17,764 1,176,353 Robert C. Lyons 31,334,806 1,557,985 23,952 1,176,353 James B. Ream 31,231,227 1,660,038 25,478 1,176,353 Adam L. Stanley 32,812,570 86,287 17,886 1,176,353 David S. Sutherland 30,967,764 1,925,391 23,588 1,176,353 Paul G. Yovovich 30,846,038 2,047,185 23,520 1,176,353

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, 2024, by the following vote: For Against Abstain Broker Non-Votes 32,355,529 1,705,636 31,931 —