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Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001193125-12-179496
Filing Date
2012-04-25
Accepted
2012-04-24 19:54:24
Documents
1
Effectiveness Date
2012-04-25

Document Format Files

Seq Description Document Type Size
1 DEFA14A d340102ddefa14a.htm DEFA14A 30592
  Complete submission text file 0001193125-12-179496.txt   31627
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.: 12777373
SIC: 3341 Secondary Smelting & Refining of Nonferrous Metals