GATX CORP — Director's Dealing 2011

May 2, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GATX CORP (GMT)
CIK: 0000040211
Period of Report: 2011-04-28

Reporting Person: LYONS ROBERT C (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-04-28	Common Stock	M	3500	$39.145	Acquired	18608	Direct
2011-04-28	Common Stock	M	3700	$24.365	Acquired	22308	Direct
2011-04-28	Common Stock	S	7000	$42.16	Disposed	15308	Direct
2011-04-28	Common Stock	S	100	$42.1601	Disposed	15208	Direct
2011-04-28	Common Stock	S	100	$42.17	Disposed	15108	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-04-28	2001 NQ Stock Option (Right to Buy)	$39.145	M	3500	Disposed	2011-07-27	Common Stock (3500)	Direct
2011-04-28	2004 NQ Stock Option (Right to Buy)	$24.365	M	3700	Disposed	2011-08-06	Common Stock (3700)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock 401(k)	2186.941	Indirect