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

 6/27/18  GATX Corp.                        11-K       12/31/17    2:217K                                                            
 6/27/18  GATX Corp.                        11-K       12/31/17    2:215K                                                            
 2/21/18  GATX Corp.                        10-K       12/31/17  140:25M                                                             
 1/26/18  Ellman Thomas A.                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/25/18  Earl James F                      5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/24/18  Brooks Michael T.                 5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/24/18  Adedoyin Niyi                     5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/24/18  Kenney Brian A                    5          Dir.,Off.²  1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/23/18  Golden Deborah A                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/23/18  Conniff James M.                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/23/18  Lyons Robert C                    5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/23/18  Titterton Paul F                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/22/18  Muckian William M                 5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/22/18  Young Jeffery R.                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/22/18  Harkness Eric D.                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    

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¹	Filing/Form Types:  -D
	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.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.