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Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0000950123-11-042292
Filing Date
2011-05-02
Accepted
2011-04-29 18:28:56
Documents
2
Effectiveness Date
2011-05-02

Document Format Files

Seq Description Document Type Size
1 DEFA14A l42547defa14a.htm DEFA14A 25908
2 GRAPHIC l42547l4254700.gif GRAPHIC 2737
  Complete submission text file 0000950123-11-042292.txt   30866
Mailing Address 1500 KEY TOWER 127 PUBLIC SQUARE CLEVELAND OH 44114
Business Address 1500 KEY TOWER 127 PUBLIC SQUARE CLEVELAND OH 44114 2167810083
OM GROUP INC (Filer) CIK: 0000899723 (see all company filings)

IRS No.: 521736882 | State of Incorp.: DE | Fiscal Year End: 1231
Type: DEFA14A | Act: 34 | File No.: 001-12515 | Film No.: 11796917
SIC: 3341 Secondary Smelting & Refining of Nonferrous Metals