GATX CORP — Director's Dealing 2004

Apr 28, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2004-04-26

Reporting Person: GLENN CURT F (Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-04-26	Common Stock	M	10000.00	$15.18	Acquired	10001.25	Direct
2004-04-26	Common Stock	S	10000.00	$24.7784	Disposed	1.25	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-04-26	2003 NQ Stock Option (Right to Buy)	$15.18	M	10000	Disposed	2013-03-21	Common Stock (10000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock - 401(k)	6611.11	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.