GATX CORP — Director's Dealing 2005

May 4, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2005-05-02

Reporting Person: SYLLA CASEY (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-05-02	Common Stock	A	836.788	$32.565	Acquired	1005.7361	Direct

Footnotes

F1: Includes 3.6032 shares acquired pursuant to a dividend reinvestment feature of the GATX Directors Phantom Stock Plan ("Phantom Stock Plan") and 2.4045 shares acquired pursuant to a dividend reinvestment feature of the Directors Deferred Fee Plan ("Deferred Fee Plan").

F2: Includes that portion of (a) the quarterly payment of the annual directors fee (437.5864 shares) credited to an account established for each director under the GATX Directors Phantom Stock Plan ("Phantom Stock Plan") and (b) the annual retainer and meeting fee (399.2016 shares) which the reporting person elected to invest in units of phantom stock under the Directors Deferred Fee Plan ("Deferred Fee Plan"), which in each case will be settled in common stock upon the expiration of the directors service on the Board.