GATX CORP — Director's Dealing 2007

May 2, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2007-04-30

Reporting Person: GLENN CURT F (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2007-04-30	Common Stock	M	5000	$15.18	Acquired	11522.3465	Direct
2007-04-30	Common Stock	S	5000	$49.9064	Disposed	6522.3465	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2007-04-30	2003 NQ Stock Option (Right to Buy)	$15.18	M	5000	Disposed	2013-03-21	Common Stock (5000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock 401(k)	7831.666	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.