OM Group Inc.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. __ )*
OM Group Inc.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
670872100
(CUSIP Number)
12/31/02
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)
*The remainder of this cover page shall be filled out for a reporting person's initial
filing on this form with respect to the subject class of securities, and for any subsequent
amendment containing information which would alter the disclosures provided in a prior
cover page.
The information required in the remainder of this cover page shall not be deemed to be
"filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or
otherwise subject to the liabilities of that section of the Act but shall be subject to all
other provisions of the Act (however, see the Notes).
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CUSIP No.: 670872100
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1. Names of Reporting Persons
IRS Identification No:
OppenheimerFunds, Inc.
IRS No. 13-2527171
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2. Check the Appropriate Box if a Member of a Group (See
Instructions):
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3. SEC Use Only
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4. Citizenship or Place of Organization:
Colorado
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Number of
Shares 5. Sole Voting Power:
Beneficially 0
Owned by
Each
Reporting
Person With
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6. Shared Voting Power:
0
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7. Sole Dispositive Power:
0
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8. Shared Dispositive Power:
1,524,900
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9. Aggregate Amount Beneficially Owned by Each Reporting Person:
1,524,900 (beneficial ownership disclaimed pursuant to Rule 13d-4 of
the Exchange Act of 1934)
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10. Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions)
[ ]
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11. Percent of Class Represented by Amount in Row (11):
5.41%
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12. Type of Reporting Person (See Instructions):
IA
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Item:
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1(a) Name of Issuer:
OM Group Inc.
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1(b) Address of Issuer's Principal Executive Offices:
Tower City, Suite 3500
50 Public Square
Cleveland, OH 44113-2204
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2(a) Name of Person Filing:
OppenheimerFunds, Inc.
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2(b) Address of Principal Business Office or, if none, Residence:
498 Seventh Avenue
New York, NY 10018
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2(c) Citizenship:
Colorado
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2(d) Title of Class of Securities:
Common Stock
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2(e) CUSIP Number:
670872100
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3 If this statement is filed pursuant toss.240.13d-1(b) orss.240.13d-2(b)
or (c), check whether the person filing is a:
[X] An investment adviser in accordance withss.240.13d-1(b)(1)(ii)(E)
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4(a) Amount beneficially owned:
1,524,900 (beneficial ownership disclaimed pursuant to Rule 13d-4 of
the Exchange Act of 1934)
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4(b) Percent of class:
5.41% (reflects amount reported in 4(b)(ii) below)
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4(c) Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
0
(ii) Shared power to vote or to direct the vote:
0
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
1,524,900
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5. Ownership of Five Percent or Less of a Class: [ ]
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6. Ownership of More than Five Percent on Behalf of Another Person.: N/A
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7. Identification and Classification of the Subsidiary Which Acquired the
Security Being Reported on By the Parent Holding Company:
N/A
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8. Identification and Classification of Members of the Group:
N/A
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9. Notice of Dissolution of Group:
N/A
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10. Certification:
By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and are held in
the ordinary course of business and were not acquired and are not held
for the purpose of or with the effect of changing or influencing the
control of the issuer of the securities and were not acquired and are
not held in connection with or as a participant in any transaction
having that purpose or effect.
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SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the
information set forth in this statement is true, complete and correct.
February 12, 2003
Date
/s/ Philip T. Masterson
Signature
Philip T. Masterson, Vice President
Name/Title
OM Group Inc 13g(123102).rtf