GATX CORP — Director's Dealing 2005

Aug 25, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2005-08-23

Reporting Person: GLENN CURT F (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-08-23	Common Stock	M	3000	$23.9375	Acquired	6969.29	Direct
2005-08-23	Common Stock	M	5000	$24.17	Acquired	11969.29	Direct
2005-08-23	Common Stock	M	5000	$15.18	Acquired	16969.29	Direct
2005-08-23	Common Stock	M	9000	$21.85	Acquired	25969.29	Direct
2005-08-23	Common Stock	S	22000	$40.3309	Disposed	3969.29	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-08-23	1996 NQ Stock Option (Right to Buy)	$23.9375	M	3000	Disposed	2006-10-25	Common Stock (3000)	Direct
2005-08-23	2002 NQ Stock Option (Right to Buy)	$24.17	M	5000	Disposed	2012-07-26	Common Stock (5000)	Direct
2005-08-23	2003 NQ Stock Option (Right to Buy)	$15.18	M	5000	Disposed	2013-03-21	Common Stock (5000)	Direct
2005-08-23	2003 NQ Stock Option (Right to Buy)	$21.85	M	9000	Disposed	2013-08-01	Common Stock (9000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock 401(k)	7279.453	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.

F2: 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.

F3: 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.

F4: 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.