GATX CORP — Director's Dealing 2005

Aug 16, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2005-08-15

Reporting Person: DUDDY GAIL L (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-08-15	Common Stock	M	5000	$23.9375	Acquired	18094.94	Direct
2005-08-15	Common Stock	S	5000	$41.1374	Disposed	13094.94	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-08-15	1996 NQ Stock Option (Right to Buy)	$23.9375	M	5000	Disposed	2006-10-25	Common Stock (5000)	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 the date of the grant and the remaining 25% commencing 3 years from the date of the grant.