OM GROUP INC

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Certification of termination of registration of a class of securities (Section 12(b))

Notification of removal from listing and/or registration on a national securities exchange

5.07,9.01

General form for quarterly reports under Section 13 or 15(d)

8.01,9.01

No description available

No description available

5.02,5.07

1.01,5.03,8.01,9.01

Specialized Disclosure Report

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

Annual Report Scanned (Paper)

Definitive Proxy Statement

1.01,8.01,9.01

Additional proxy soliciting materials filed by a non-management party

Annual report pursuant to Section 13 or 15(d)

2.02,9.01

2.02

Letter from the SEC

Additional proxy soliciting materials filed by a non-management party

Additional Information for Proxy Statement/ Votes

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Letter from the SEC

Correspondence with the SEC

5.02

Letter from the SEC

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Specialized Disclosure Report

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Post Effective Amendment to S-8

Annual Report Scanned (Paper)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

5.02

2.02,9.01

5.02

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

1.01,1.02,2.03,8.01,9.01

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d) (amendment)

General form for quarterly reports under Section 13 or 15(d) (amendment)

General form for quarterly reports under Section 13 or 15(d) (amendment)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Annual Report Scanned (Paper)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Shareholder Letter

Additional Information for Proxy Statement/ Votes

Annual Report Scanned (Paper)

Definitive Proxy Statement

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual Report Scanned (Paper)

Definitive Proxy Statement

Letter from the SEC

Correspondence with the SEC

Definitive Proxy Statement

Definitive Proxy Statement

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Prospectus Supplement with Pricing Information

Amended Initial Registration Statement

No description available

Registration (IPO) statement under Securities Act of 1933

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Mullin Patrick S.

GINGO JOSEPH M

SPIZZO ALLEN A

Johnson Michael V.

SCAMINACE JOSEPH

Christenson Carl R

Griffith Greg J

MCFARLAND JOHN A

Hix Christopher M

Knowles David B

PLOURDE KATHARINE

BETZ HANS GEORG DR

SACHS VALERIE GENTILE

SCAMINACE JOSEPH

Mullin Patrick S.

GINGO JOSEPH M

BLACKBURN RICHARD W