0001209191-13-021003.txt : 20130409 0001209191-13-021003.hdr.sgml : 20130409 20130409195256 ACCESSION NUMBER: 0001209191-13-021003 CONFORMED SUBMISSION TYPE: 3 PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20130408 FILED AS OF DATE: 20130409 DATE AS OF CHANGE: 20130409 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Knowles David B CENTRAL INDEX KEY: 0001467341 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 001-12515 FILM NUMBER: 13752080 MAIL ADDRESS: STREET 1: 1293 SOUTH MAIN STREET CITY: AKRON STATE: OH ZIP: 44301 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: OM GROUP INC CENTRAL INDEX KEY: 0000899723 STANDARD INDUSTRIAL CLASSIFICATION: SECONDARY SMELTING & REFINING OF NONFERROUS METALS [3341] IRS NUMBER: 521736882 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 1500 KEY TOWER STREET 2: 127 PUBLIC SQUARE CITY: CLEVELAND STATE: OH ZIP: 44114 BUSINESS PHONE: 2167810083 MAIL ADDRESS: STREET 1: 1500 KEY TOWER STREET 2: 127 PUBLIC SQUARE CITY: CLEVELAND STATE: OH ZIP: 44114 3 1 doc3.xml FORM 3 SUBMISSION X0206 3 2013-04-08 1 0000899723 OM GROUP INC OMG 0001467341 Knowles David B 1500 KEY TOWER 127 PUBLIC SQUARE CLEVELAND OH 44114-1221 0 1 0 0 President and COO No securities are beneficially owned. Exhibit 24 - Power of Attorney /s/ David B. Knowles, by Michele Connell as attorney-in-fact 2013-04-09 EX-24 2 attachment1.htm EX-24 DOCUMENT


POWER OF ATTORNEY
      KNOW ALL MEN BY THESE PRESENTS:  That the undersigned has made,
constituted and appointed, and by this instrument does make, constitute and
appoint VALERIE GENTILE SACHS, ROBERT PIERCE, and MICHELE CONNELL, acting
individually, as his true and lawful attorney, for him, and in his name, place
and stead, to affix, as attorney-in-fact, the signature of the undersigned to
any reports or filings to the Securities and Exchange Commission on or in
connection with Forms 3, 4, 5 or 144 with respect to transactions or holdings by
the undersigned in equity securities issued by OM Group, Inc., a Delaware
corporation, and to any and all amendments to such reports, giving and granting
unto each such attorney-in-fact full power and authority to do and perform every
act and thing whatsoever necessary to be done in the premises, as fully as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that each such attorney-in-fact shall lawfully do or cause to be
done by virtue hereof.

      This Power of Attorney shall expire on the date the undersigned is no
longer required to file Forms 3, 4, 5 or 144 reports with the Securities and
Exchange Commission with respect to holdings of and transactions in securities
issued by OM Group, Inc., unless revoked in writing prior thereto.
      IN WITNESS WHEREOF, this Power of Attorney has been signed in Cincinnati,
Ohio as of the 28th day of March, 2013.




	/s/ David B. Knowles
	David B. Knowles