GATX CORP — Director's Dealing 2007

May 4, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2007-05-03

Reporting Person: KENNEY BRIAN A (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2007-05-03	Common Stock	M	6000	$33.4688	Acquired	60863.3999	Direct
2007-05-03	Common Stock	S	6000	$50	Disposed	54863.3999	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2007-05-03	1997 NQ Stock Option (Right to Buy)	$33.4688	M	6000	Disposed	2007-10-24	Common Stock (6000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock 401(k)	5899.469	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 the date of the grant and the remaining 25% commencing 3 years from the date of the grant.