Certification of Principal Financial Officer
I, Thomas A. Ellman, certify that:
1. I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K of GATX Corporation (the "Company"); and
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
|/s/ THOMAS A. ELLMAN|
|Thomas A. Ellman|
|Executive Vice President and Chief Financial Officer|
March 30, 2020