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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000938885-03-000003.txt : 20030502
<SEC-HEADER>0000938885-03-000003.hdr.sgml : 20030502
<ACCEPTANCE-DATETIME>20030502172712
ACCESSION NUMBER:		0000938885-03-000003
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030501
FILED AS OF DATE:		20030502

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ROGERS JOHN W JR
		CENTRAL INDEX KEY:			0000938885
		RELATIONSHIP:				DIRECTOR

	FILING VALUES:
		FORM TYPE:		4

	BUSINESS ADDRESS:	
		STREET 1:		307 NORTH MICHIGAN AVENUE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60601

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GATX CORP
		CENTRAL INDEX KEY:			0000040211
		STANDARD INDUSTRIAL CLASSIFICATION:	TRANSPORTATION SERVICES [4700]
		IRS NUMBER:				361124040
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-02328
		FILM NUMBER:		03680556

	BUSINESS ADDRESS:	
		STREET 1:		500 W MONROE  ST
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60661
		BUSINESS PHONE:		3126216200

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GENERAL AMERICAN TRANSPORTATION CORP
		DATE OF NAME CHANGE:	19750722
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.txt
<DESCRIPTION>FORM 4 - 05-01-2003
<TEXT>
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 4
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
( ) Check this box if no longer subject to Section 16.
Form 4 or Form 5 obligations may continue. See Instructions 1(b).
1. Name and Address of Reporting Person
   John W. Rogers, Jr.
   Ariel Capital Management, Inc.
307 North Michigan Avenue
Suite 500
   IL, Chicago 60601
2. Issuer Name and Ticker or Trading Symbol
   GATX CORPORATION (GMT)

3. IRS or Social Security Number of Reporting Person (Voluntary)
   ###-##-####
4. Statement for Month/Day/Year
   5/1/2003
5. If Amendment, Date of Original (Month/Day/Year)

6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
   (X) Director ( ) 10% Owner ( ) Officer (give title below) ( ) Other
   (specify below)

7. Individual or Joint/Group Filing (Check Applicable Line)
   (X) Form filed by One Reporting Person
   ( ) Form filed by More than One Reporting Person
<TABLE>
<CAPTION>
___________________________________________________________________________________________________________________________________
 Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned                                                 |
___________________________________________________________________________________________________________________________________|
1. Title of Security|2.    |2A.   |3.    |4.Securities Acquired (A)         |5.Amount of        |6.Dir |7.Nature of Indirect       |
                    |Trans-|Exec- |Trans |  or Disposed of (D)              |  Securities       |ect   |  Beneficial Ownership     |
                    |action|ution |action|                                  |  Beneficially     |(D)or |                           |
                    |      |      |    | |                  | A/|           |  Owned Following  |Indir |                           |
                    |Date  | Date |Code|V|    Amount        | D |    Price  |  Reported Trans(s)|ect(I)|                           |
___________________________________________________________________________________________________________________________________|
<S>                 <C>    <C>    <C>  <C><C>               <C> <C>         <C>                 <C>    <C>
Common Stock        |5/1/ 2|      |A   | |1304.8157 1       |A  |18.585     |9358.6616 2        |D     |                           |
                    |003   |      |    | |                  |   |           |                   |      |                           |
- -----------------------------------------------------------------------------------------------------------------------------------|
___________________________________________________________________________________________________________________________________|
<CAPTION>
___________________________________________________________________________________________________________________________________|
 Table II -- Derivative Securitites Acquired, Disposed of, or Beneficially Owned                                                   |
___________________________________________________________________________________________________________________________________|
1.Title of   |2.Con-  |3.     |3A.   |4.    |5.Number of De |6.Date Exer|7.Title and Amount  |8.Price|9.Number    |10.|11.Nature of|
  Derivative |version |Trans- |Deemed|Trans-| rivative Secu |cisable and|  of Underlying     |of Deri|of Deriva   |Dir|Indirect    |
  Security   |or Exer |action |      |action| rities Acqui  |Expiration |  Securities        |vative |tive        |ect|Beneficial  |
             |cise    |       |Execu-|      | red(A) or Dis |Date(Month/|                    |Secu   |Securities  |(D)|Ownership   |
             |Price of|       |ution |      | posed of(D)   |Day/Year)  |                    |rity   |Benefi      |or |            |
             |Deriva- |       |      |      |               |Date |Expir|                    |       |ficially    |Ind|            |
             |tive    |       |      |      |           | A/|Exer-|ation|   Title and Number |       |Owned Follow|ire|            |
             |Secu-   |(Month/|(Month|    | |           | D |cisa-|Date |   of Shares        |       |ing Reported|ct |            |
             |rity    |Day/   |/Day/ |Code|V|  Amount   |   |ble  |     |                    |       |Trans-      |(I)|            |
             |        |Year)  |Year) |    | |           |   |     |     |                    |       |action(s)   |   |            |
___________________________________________________________________________________________________________________________________|
<S>          <C>      <C>     <C>    <C>  <C><C>        <C> <C>   <C>   <C>          <C>     <C>     <C>          <C> <C>
             |        |       |      |    | |           |   |     |     |            |       |       |            |   |            |
___________________________________________________________________________________________________________________________________|
</TABLE>
Explanation of Responses:
1. Includes that portion of (a) the quarterly payment of the annual directors'
fee (766.7474 shares) credited to an account established for each director
under the GATX Directors' Phantom Stock Plan ("Phantom Stock Plan") and (b) the
annual retainer and m
eeting fee (538.0683 shares) which the reporting person elected to invest in
units of phantom stock under the Directors' Deferred Fee Plan which in each
case will be settled in common stock upon the expiration of the director's
service on the Board.
2. Includes 113.8733 shares acquired pursuant to a dividend reinvestment
feature of the Phantom Stock Plan and 33.1057 shares acquired pursuant to a
dividend reinvestment feature of the Deferred Fee Plan.
SIGNATURE OF REPORTING PERSON
John W. Rogers, Jr.
John W. Rogers, Jr.

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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