X0508 4 2024-01-30 false 0000040211 GATX CORP GATX 0001534505 Ellman Thomas A. 233 S. WACKER DR. CHICAGO IL 60606 false true false false EVP & CFO false Common Stock 2024-01-30 4 M false 18000.00 69.735 A 53429.00 D Common Stock 2024-01-30 4 S false 17800.00 127.5344 D 35629.00 D Common Stock 2024-01-30 4 S false 200.00 128.2319 D 35429.00 D Common Stock 401(k) 10050.00 I 401(k) 2018 NQ Stock Option (Right to Buy) 69.735 2024-01-30 4 M false 18000.00 0.00 D 2019-01-25 2025-01-25 Common Stock 18000.00 0.00 D Represents the weighted average sale price. The highest price at which shares were sold was $128.1400 and the lowest price at which shares were sold was $127.1738. Information regarding the number of shares sold at each separate price will be made available from the reporting person upon request by the SEC, the issuer or its shareholders. Represents the weighted average sale price. The highest price at which shares were sold was $128.2800 and the lowest price at which shares were sold was $128.1838. Information regarding the number of shares sold at each separate price will be made available from the reporting person upon request by the SEC, the issuer or its shareholders. GATX Corporation's 401(k) plan is a unitized stock fund made up of company stock plus short term investments. Because the fund includes more than company stock, participants hold units of the fund rather than company shares of stock. The number of units held by a participant may vary depending on the performance of the company stock, the overall stock market, and the amount of short term investments in the fund. Such a variance has caused the value of the units in the reporting person's 401(k) fund to be reduced without any actual disposition of shares. Lisa M. Ibarra, by Power of Attorney on behalf of Thomas A. Ellman 2024-01-31