As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 6/28/23  GATX Corp.                        11-K       12/31/22    2:166K                                                            
 6/28/23  GATX Corp.                        11-K       12/31/22    2:166K                                                            
 3/17/23  GATX Corp.                        ARS        12/31/22    1:5.1M                                   Donnelley … Solutions/FA 
 2/16/23  GATX Corp.                        10-K       12/31/22  152:32M                                                             
 1/27/23  Ellman Thomas A.                  5          Officer²    1:4K   GATX Corp.                        Solium Capital Inc.      
 1/27/23  Glassberg Brian L                 5          Officer²    1:4K   GATX Corp.                        Solium Capital Inc.      
 1/27/23  Young Jeffery R.                  5          Officer²    1:4K   GATX Corp.                        Solium Capital Inc.      
 1/27/23  Van Aken Jennifer                 5          Officer²    1:4K   GATX Corp.                        Solium Capital Inc.      
 1/27/23  Adedoyin Niyi                     5          Officer²    1:4K   GATX Corp.                        Solium Capital Inc.      
 1/27/23  Lyons Robert C                    5          Dir.,Off.²  1:4K   GATX Corp.                        Solium Capital Inc.      
 1/27/23  McManus Jennifer                  5          Officer²    1:4K   GATX Corp.                        Solium Capital Inc.      
 1/27/23  Zmudka Robert                     5          Officer²    1:4K   GATX Corp.                        Solium Capital Inc.      

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¹	Filing/Form Types:
	5	Annual Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 5 { The Filer is an Insider² of the Issuer }.
	10-K	Annual Report — Form 10-K.
	11-K	Annual Report by an Employee Stock Purchase, Savings or Similar Plan — Form 11-K.
	ARS	Annual Report to Security Holders.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.