GATX CORP

New Share Repurchase Program

On January 25, 2019, our Board of Directors approved a $300.0 million share repurchase program, which, as of December 31, 2025, had $0.1 million remaining available under the repurchase authorization. On February 18, 2026, the Board terminated such prior repurchase program and approved a new share repurchase program under which the Company may repurchase, from time to time, up to a maximum of $300.0 million of the Company's common shares. The new repurchase program does not have an expiration date, does not obligate the Company to repurchase any specific number of shares and may be modified, suspended or terminated at any time at the Company's discretion. Repurchases under the new program may be made from time to time in the open market, through privately negotiated transactions, or otherwise, including pursuant to Rule 10b5-1 plans, as determined by the Company. Future repurchases will depend on factors such as the then current market price of the Company's common shares, market and business conditions, and other factors.

Insider Trading Plans

None of the Company's directors or officers adopted orterminated a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement", as each term is defined in Item 408(a) of Regulation S-K, during the quarter ended December 31, 2025.