X0306 5 2016-12-31 false 0 0 0000040211 GATX CORP GATX 0001422898 Brooks Michael T. 222 W. ADAMS ST. CHICAGO IL 60606 false true false false SVP & Chief Ops. Off. Rail NA Common Stock 20600.267 D Common Stock 401(k) 530.67 I 401(k) Plan Includes 419.045 shares acquired through the reinvestment of dividends. The price of the stock is based on the closing price on 12/31. These shares were acquired during the fiscal year (1/1-12/31) pursuant to the GATX 401(k) plan. Lisa M. Ibarra, by Power of Attorney on behalf of Michael T. Brooks 2017-01-23