Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  BAK MARCUS P
 2. Date of Event Requiring Statement (Month/Day/Year)
11/03/2003		 3. Issuer Name and Ticker or Trading Symbol
OM GROUP INC [OMG]
(Last)
(First)
(Middle)
1500 KEY TOWER, 127 PUBLIC SQUARE		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Vice President Nickel
 5. If Amendment, Date Original Filed(Month/Day/Year)
11/05/2003
(Street)

CLEVELAND, OH 44114		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (1) 11/05/1997 11/05/2006 Stock Option 2,940 $ 26.67 D  
Stock Option (1) 10/27/1998 10/27/2007 Stock Option 4,500 $ 39.94 D  
Stock Option (1) 11/08/1999 11/08/2008 Stock Option 6,000 $ 35.38 D  
Stock Option (1) 11/05/2000 11/05/2009 Stock Option 6,000 $ 36.25 D  
Stock Option (1) 11/06/2001 11/06/2010 Stock Option 7,000 $ 46.75 D  
Stock Option (1) 11/05/2002 11/05/2011 Stock Option 7,000 $ 59.2 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
BAK MARCUS P
1500 KEY TOWER
127 PUBLIC SQUARE
CLEVELAND, OH 44114		       Vice President Nickel  

Signatures

Paul Schulz, Attorney-in-fact 11/23/2004
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Inadvertantly omitted from original Form 3 filing - shares issued before person became an executive officer.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.