X0508 4 2024-02-01 false 0000040211 GATX CORP GATX 0001329553 Wilson Stephen R C/O 233 S. WACKER DR. CHICAGO IL 60606 true false false false false Common Stock 2024-02-01 4 A false 62.00 124.9839 A 19956.00 D Represents additional shares of phantom stock credited to the reporting person's account under the GATX Directors' Phantom Stock Plan ("Phantom Stock Plan") credited on the transaction date. Each share of phantom stock represents the right to receive one share of Issuer's common stock upon settlement. The shares of phantom stock are generally payable on a deferred basis in common stock at the election of the reporting person upon the reporting person's termination of service on the Issuer's board of directors. Represents 62 shares of phantom stock acquired pursuant to the dividend reinvestment feature of the Phantom Stock Plan. Lisa M. Ibarra, by Power of Attorney on behalf of Stephen R. Wilson 2024-02-05