Exhibit 1


CONFIRMING STATEMENT



This Statement confirms that the undersigned, Diane M. Aigotti,
has authorized and designated either Deborah A. Golden, Peter J.
Falconer, Marland O. Webb or 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 Deborah A. Golden, Peter J.
Falconer, Marland O. Webb 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 Deborah A. Golden, Peter J. Falconer, Marland O. Webb,
nor Lisa M. Ibarra is assuming any of the undersigneds
responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.



Date: October 28, 2016




_______________________________
	/s/ Diane M. Aigotti
	Diane M. Aigotti


M. Ibarra is assuming any of the undersigned