GATX CORP — Director's Dealing 2004

Aug 5, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2004-08-04

Reporting Person: Scott S Yvonne (VP and CIO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-08-04	Common Stock	M	1000.00	$20.9063	Acquired	1817.94	Direct
2004-08-04	Common Stock	S	1000.00	$25.26	Disposed	817.94	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-08-04	1994 NQ Stock Option (right to buy)	$20.9063	M	1000	Disposed	2004-10-28	Common Stock (1000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock - 401(k)	2364.55	Indirect

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.