GATX CORP — Director's Dealing 2004

Dec 10, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2004-12-08

Reporting Person: HASEK WILLIAM J (Vice President and Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-12-08	Common Stock	M	1000.00	$23.7813	Acquired	3136.54	Direct
2004-12-08	Common Stock	S	1000.00	$29.0387	Disposed	2136.54	Direct
2004-12-08	Common Stock	M	1000.00	$23.9375	Acquired	3136.54	Direct
2004-12-08	Common Stock	S	1000.00	$29.0387	Disposed	2136.54	Direct
2004-12-08	Common Stock	M	5000.00	$24.17	Acquired	7136.54	Direct
2004-12-08	Common Stock	S	5000.00	$29.0387	Disposed	2136.54	Direct
2004-12-09	Common Stock	S	2136.54	$28.911	Disposed	0.00	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-12-08	1995 NQ Stock Option (right to buy)	$23.7813	M	1000	Disposed	2005-10-27	Common Stock (1000)	Direct
2004-12-08	1996 NQ Stock Option (right to buy)	$23.9375	M	1000	Disposed	2006-10-25	Common Stock (1000)	Direct
2004-12-08	July, 2002 NQ Stock Option (Right to Buy)	$24.17	M	5000	Disposed	2012-07-26	Common Stock (5000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock - 401(k)	290.86	Indirect

Footnotes

F1: Between December 31, 2003 and September 30, 2003 the reporting person acquired 50.4896 shares through the reinvestment of dividen
ds in the Employee Stock Purchase Plan.

F2: 50% of option granted may be exercised commencing 1 year from the date of the grant, an additional 25% commencing 2 years from th
e date of the grant and the remaining 25% commencing 3 years from the date of the grant.

F3: 100% of the options become exercisable on December 31, 2003.