UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): July 27, 2007

GATX Corporation

(Exact name of registrant as specified in its charter)

New York
(State or other jurisdiction of
incorporation) 1-2328
(Commission File)
Number) 36-1124040
(IRS Employer
Identification No.)

500 West Monroe Street
Chicago, Illinois 60661-3676

(Address of principal executive offices, including zip code)

(312) 621-6200

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the obligation of the registrant under any of the following provisions:

o Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers.

     On July 27, 2007, the Board of Directors of GATX Corporation (the “Company”) elected David S. Sutherland to serve as an independent director on the Board of Directors of the Company. The committees of the Board of Directors to which Mr. Sutherland will be named have not been determined at this time.

     A copy of the press release announcing this action is included as an exhibit to this report.

Item 9.01 Financial Statements and Exhibits.

     (d) Exhibits

          99.1 Press Release dated July 30, 2007.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

GATX CORPORATION

(Registrant) 

/s/ Robert C. Lyons  

Robert C. Lyons 

Senior Vice-President, Chief Financial Officer (Duly Authorized Officer) 

Date: July 30, 2007

EXHIBIT INDEX

Exhibit No.	Description	Method of Filing
99.1	Press Release of GATX Corporation, dated July 30, 2007 announcing David S. Sutherland’s election to serve on the Board of Directors of GATX Corporation.	Filed Electronically