Exhibit 1



CONFIRMING STATEMENT



This Statement confirms that the undersigned, Anne L. Arvia, has
authorized and designated Brian L. Glassberg, Alan R. Haguewood
and Lisa M. Ibarra to execute and file on the undersigneds
behalf all Forms 3, 4 and 5 (including any amendments thereto)
that the undersigned may be required to file with the U.S.
Securities and Exchange Commission as a result of the
undersigneds ownership of or transactions in securities of GATX
Corporation. The authority of Brian L. Glassberg, Alan R.
Haguewood and Lisa M. Ibarra under this Statement shall continue
until the undersigned is no longer required to file Forms 3, 4
and 5 with regard to the undersigneds ownership of or
transactions in securities of GATX Corporation, unless earlier
revoked in writing. The undersigned acknowledges that neither
Brian L. Glassberg, nor Alan R. Haguewood nor Lisa M. Ibarra is
assuming any of the undersigneds responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934.




Date: January 23, 2023



/s/ Anne L. Arvia
Anne L. Arvia