GATX CORP — Director's Dealing 2005

Aug 18, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2005-08-16

Reporting Person: Scott S Yvonne (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-08-16	Common Stock	M	2750	$24.17	Acquired	6583.97	Direct
2005-08-16	Common Stock	M	7500	$21.85	Acquired	14083.97	Direct
2005-08-16	Common Stock	M	2250	$24.365	Acquired	16333.97	Direct
2005-08-16	Common Stock	S	10760	$41.4459	Disposed	5573.97	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-08-16	2002 NQ Stock Option (Right to Buy)	$24.17	M	2750	Disposed	2012-07-26	Common Stock (2750)	Direct
2005-08-16	2003 NQ Stock Option (Right to Buy)	$21.85	M	7500	Disposed	2013-08-01	Common Stock (7500)	Direct
2005-08-16	2004 NQ Stock Option (Right to Buy)	$24.365	M	2250	Disposed	2011-08-06	Common Stock (2250)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock 401(k)	2620.812	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.