GATX CORP — Director's Dealing 2004

Dec 9, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

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

Reporting Person: DAMMEYER RODNEY F (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-12-08	Common Stock	M	1000.00	$24.17	Acquired	9032.37	Direct
2004-12-08	Common Stock	S	1000.00	$29.164	Disposed	8032.37	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-12-08	July, 2002 NQ Stock Option (Right to Buy)	$24.17	M	1000	Disposed	2012-07-26	Common Stock (1000)	Direct

Footnotes

F1: 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.