Holmes John McClain III

Row 1 · 2026-07-31 · Tax withholding · Disposed 34,143 · Balance 447,582

F1: The reporting person is reporting the withholding of 34,143 shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the vesting of performance-based restricted stock.

Row 2 · 2026-07-31 · Tax withholding · Disposed 6,220 · Balance 441,362

F2: The reporting person is reporting the withholding of 6,220 shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the vesting of time-based restricted stock.

Row 1 · 2026-08-03 · Grant · Acquired 142 · Balance 4,464

F1: Represents additional shares of phantom stock/RSUs credited to the reporting person's account under the Amended and Restated GATX Directors' Phantom Stock Plan ("Phantom Stock Plan") and the Amended and Restated GATX Corporation Directors' Voluntary Deferred Fee Plan ("Deferred Fee Plan") on the transaction date. Each share of phantom stock/RSU represents the right to receive one share of Issuer's common stock upon settlement. The shares of phantom stock/RSUs 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.

F2: Represents (a) 16 shares of phantom stock/RSUs acquired pursuant to the dividend reinvestment feature of the Phantom Stock Plan and Deferred Fee Plan, and (b) 126 RSUs acquired under the Deferred Fee Plan resulting from the reporting person's election to defer the annual cash retainer and other cash fees payable to the reporting person in the form of RSUs under the Deferred Fee Plan.