-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, FLsZGgAlTRcjmFI6NgsSiUxeuCTt+Sxxx2ZgLvvnwt3GOCAHZNgpIluUcT6jkCWG k30fs8qA9c9/Kd0K3Zh36A== 0000902664-02-000925.txt : 20021209 0000902664-02-000925.hdr.sgml : 20021209 20021209162831 ACCESSION NUMBER: 0000902664-02-000925 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20021209 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: OM GROUP INC CENTRAL INDEX KEY: 0000899723 STANDARD INDUSTRIAL CLASSIFICATION: INDUSTRIAL INORGANIC CHEMICALS [2810] IRS NUMBER: 521736882 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-42673 FILM NUMBER: 02852516 BUSINESS ADDRESS: STREET 1: 50 PUBLIC SQ STREET 2: STE 3500 CITY: CLEVELAND STATE: OH ZIP: 44113 BUSINESS PHONE: 2167810083 MAIL ADDRESS: STREET 1: 50 PUBLIC SQ STREET 2: STE 3500 CITY: CLEVELAND STATE: OH ZIP: 44113 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: ARDSLEY ADVISORY PARTNERS CENTRAL INDEX KEY: 0000900529 IRS NUMBER: 0 STATE OF INCORPORATION: CT FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 262 HARBOR DRIVE, 4TH FLOOR CITY: STAMFORD STATE: CT ZIP: 06902 BUSINESS PHONE: 203-564-4230 MAIL ADDRESS: STREET 1: 262 HARBOR DRIVE, 4TH FLOOR CITY: STAMFORD STATE: CT ZIP: 06902 SC 13G 1 srz9344645v2.txt FORM 13G OM GROUP, INC. SECURITIES & EXCHANGE COMMISSION Washington, D.C. 20549 ______________________ SCHEDULE 13G* INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) and (c) OM Group, Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 670872100 (CUSIP Number) December 4, 2002 (Date of event which requires filing of this statement) Check the appropriate box to designate the rule pursuant to which this Schedule 13G is filed: [ ] Rule 13d-1(b) [X] Rule 13d-1(c) [ ] Rule 13d-1(d) (Page 1 of 17 Pages) ________________ *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 purposes 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). CUSIP No. 67087210 13G Page 2 of 17 Pages _______________________________________________________________________ (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Ardsley Advisory Partners _______________________________________________________________________ (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [x] (b) [ ] _______________________________________________________________________ (3) SEC USE ONLY _______________________________________________________________________ (4) CITIZENSHIP OR PLACE OF ORGANIZATION Connecticut _______________________________________________________________________ NUMBER OF (5) SOLE VOTING POWER -0- SHARES _________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 2,850,000 OWNED BY _________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER -0- REPORTING _________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 2,850,000 _______________________________________________________________________ (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,850,000 _______________________________________________________________________ (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] _______________________________________________________________________ (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 10.11% _______________________________________________________________________ (12) TYPE OF REPORTING PERSON ** IA _______________________________________________________________________ ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 67087210 13G Page 3 of 17 Pages _______________________________________________________________________ (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Ardsley Partners I _______________________________________________________________________ (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [x] (b) [ ] _______________________________________________________________________ (3) SEC USE ONLY _______________________________________________________________________ (4) CITIZENSHIP OR PLACE OF ORGANIZATION Connecticut _______________________________________________________________________ NUMBER OF (5) SOLE VOTING POWER -0- SHARES _________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 2,850,000 OWNED BY _________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER -0- REPORTING _________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 2,850,000 _______________________________________________________________________ (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,850,000 _______________________________________________________________________ (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] _______________________________________________________________________ (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 10.11% _______________________________________________________________________ (12) TYPE OF REPORTING PERSON ** PN _______________________________________________________________________ ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 67087210 13G Page 4 of 17 Pages _______________________________________________________________________ (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Philip J. Hempleman _______________________________________________________________________ (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [x] (b) [ ] _______________________________________________________________________ (3) SEC USE ONLY _______________________________________________________________________ (4) CITIZENSHIP OR PLACE OF ORGANIZATION United States _______________________________________________________________________ NUMBER OF (5) SOLE VOTING POWER -0- SHARES _________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 2,850,000 OWNED BY _________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER -0- REPORTING _________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 2,850,000 _______________________________________________________________________ (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,850,000 _______________________________________________________________________ (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] _______________________________________________________________________ (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 10.11% _______________________________________________________________________ (12) TYPE OF REPORTING PERSON ** IN _______________________________________________________________________ ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 67087210 13G Page 5 of 17 Pages _______________________________________________________________________ (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Ardsley Offshore Fund Ltd. _______________________________________________________________________ (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [x] (b) [ ] _______________________________________________________________________ (3) SEC USE ONLY _______________________________________________________________________ (4) CITIZENSHIP OR PLACE OF ORGANIZATION British Virgin Islands _______________________________________________________________________ NUMBER OF (5) SOLE VOTING POWER -0- SHARES _________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 775,000 OWNED BY _________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER -0- REPORTING _________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 775,000 _______________________________________________________________________ (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 775,000 _______________________________________________________________________ (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] _______________________________________________________________________ (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.75% _______________________________________________________________________ (12) TYPE OF REPORTING PERSON ** OO _______________________________________________________________________ ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 67087210 13G Page 6 of 17 Pages _______________________________________________________________________ (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Ardsley Partners Fund II, L.P. _______________________________________________________________________ (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [x] (b) [ ] _______________________________________________________________________ (3) SEC USE ONLY _______________________________________________________________________ (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware _______________________________________________________________________ NUMBER OF (5) SOLE VOTING POWER -0- SHARES _________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 725,000 OWNED BY _________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER -0- REPORTING _________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 725,000 _______________________________________________________________________ (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 725,000 _______________________________________________________________________ (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] _______________________________________________________________________ (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.57% _______________________________________________________________________ (12) TYPE OF REPORTING PERSON ** PN _______________________________________________________________________ ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 67087210 13G Page 7 of 17 Pages _______________________________________________________________________ (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Ardsley Partners Fund I, L.P. _______________________________________________________________________ (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [x] (b) [ ] _______________________________________________________________________ (3) SEC USE ONLY _______________________________________________________________________ (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware _______________________________________________________________________ NUMBER OF (5) SOLE VOTING POWER -0- SHARES _________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 425,000 OWNED BY _________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER -0- REPORTING _________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 425,000 _______________________________________________________________________ (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 425,000 _______________________________________________________________________ (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] _______________________________________________________________________ (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.51% _______________________________________________________________________ (12) TYPE OF REPORTING PERSON ** PN _______________________________________________________________________ ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 67087210 13G Page 8 of 17 Pages _______________________________________________________________________ (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Ardsley Partners Institutional Fund, L.P. _______________________________________________________________________ (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [x] (b) [ ] _______________________________________________________________________ (3) SEC USE ONLY _______________________________________________________________________ (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware _______________________________________________________________________ NUMBER OF (5) SOLE VOTING POWER -0- SHARES _________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 450,000 OWNED BY _________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER -0- REPORTING _________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 450,000 _______________________________________________________________________ (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 450,000 _______________________________________________________________________ (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] _______________________________________________________________________ (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.6% _______________________________________________________________________ (12) TYPE OF REPORTING PERSON ** PN _______________________________________________________________________ ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 67087210 13G Page 9 of 17 Pages _______________________________________________________________________ (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Augusta Partners L.P. _______________________________________________________________________ (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [x] (b) [ ] _______________________________________________________________________ (3) SEC USE ONLY _______________________________________________________________________ (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware _______________________________________________________________________ NUMBER OF (5) SOLE VOTING POWER -0- SHARES _________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 475,000 OWNED BY _________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER -0- REPORTING _________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 475,000 _______________________________________________________________________ (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 475,000 _______________________________________________________________________ (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] _______________________________________________________________________ (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.69% _______________________________________________________________________ (12) TYPE OF REPORTING PERSON ** PN _______________________________________________________________________ ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 67087210 13G Page 10 of 17 Pages Item 1(a). Name of Issuer: The name of the issuer is OM Group, Inc. (the "Company"). Item 1(b). Address of Issuer's Principal Executive Offices: The Company's principal executive offices are located at Tower City 50 Public Square Suite 3500, Cleveland, Ohio, 44113-2204. Item 2(a). Name of Person Filing: This statement is filed by: (i) Ardsley Offshore Fund Ltd., a British Virgin Islands Corporation, ("Ardsley Offshore"), with respect to the shares of Common Stock (defined in Item 2(d) below) directly owned by it; (ii) Ardsley Partners Fund II, L.P., a Delaware limited partnership, ("Ardsley Fund II"), with respect to the shares of Common Stock directly owned by it; (iii) Ardsley Partners Fund I, L.P., a Delaware limited partnership ("Ardsley Fund I"), with respect to the shares of Common Stock directly owned by it; (iv) Ardsley Partners Institutional Fund, L.P., a Delaware limited partnership, ("Ardsley Institutional") with respect to the shares of Common Stock directly owned by it; (v) Augusta Partners L.P., a Delaware limited partnership("Augusta Partners") with respect to the shares of Common Stock directly owned by it; (vi) Ardsley Advisory Partners, a Connecticut general partnership, ("Ardsley"), which serves as Investment Adviser to Ardsley Offshore, Ardsley Fund II, Ardsley Fund I, Ardsley Institutional and Augusta Partners, with respect to the shares of Common Stock owned by Ardsley Offshore, Ardsley Fund II, Ardsley Fund I, Ardsley Institutional and Augusta Partners; (vii) Ardsley Partners I, a Connecticut general partnership ("Ardsley Partners"), the General Partner of Ardsley, with respect to the shares of Common Stock owned by Ardsley Offshore, Ardsley Fund II, Ardsley Fund I, Ardsley Institutional and Augusta Partners; (viii) Philip J. Hempleman, the managing partner of Ardsley,("Mr. Hempleman"), with respect to the shares of Common Stock owned by Ardsley Offshore, Ardsley Fund II, Ardsley Fund I, Ardsley Institutional and Augusta Partners. The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons". Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party. CUSIP No. 67087210 13G Page 11 of 17 Pages Item 2(b). Address of Principal Business Office or, if None, Residence: The address of the business office of each of the Reporting Persons, with the exception of Augusta Partners and Ardsley Offshore Fund Ltd., is 262 Harbor Drive, Stamford Connecticut 06902. The address of the business office of Augusta Partners is 622 Third Avenue, New York, New York 10017. The address of the business office of Ardsley Offshore Fund Ltd. is Romasco Place, Wickhams Cay 1, Roadtown Tortola, British Virgin Islands. Item 2(c). Citizenship: Ardsley Advisory Partners and Ardsley Partners I are Connecticut general partnerships. Ardsley Partners Fund II, L.P., Ardsley Partners Fund I, L.P. Ardsley Partners Institutional Fund, L.P. and Augusta Partners L.P. are Delaware limited partnerships. Ardsley Offshore Fund, Ltd. is a British Virgin Islands Corporation. Mr. Hempleman is a United States citizen. Item 2(d). Title of Class of Securities: OM Group, Inc. Class A Common Stock, $0.01 par value (the "Common Stock") Item 2(e). CUSIP Number: 67087210 Item 3. If this statement is filed pursuant to Rules 13d-1(b) or 13d-2(b) or (c), check whether the person filing is a: (a) [ ] Broker or dealer registered under Section 15 of the Act, (b) [ ] Bank as defined in Section 3(a)(6) of the Act, (c) [ ] Insurance Company as defined in Section 3(a)(19) of the Act, (d) [ ] Investment Company registered under Section 8 of the Investment Company Act of 1940, (e) [ ] Investment Adviser in accordance with Rule 13d-1 (b)(1)(ii)(E), (f) [ ] Employee Benefit Plan or Endowment Fund in accordance with 13d-1 (b)(1)(ii)(F), (g) [ ] Parent Holding Company or control person in accordance with Rule 13d-1 (b)(1)(ii)(G), (h) [ ] Savings Association as defined in Section 3(b) of the Federal Deposit Insurance Act, CUSIP No. 67087210 13G Page 12 of 17 Pages (i) [ ] Church Plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940, (j) [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(J). If this statement is filed pursuant to Rule 13d-1(c), check the box. [X] Item 4. Ownership. A. Ardsley Advisory Partners (a) Amount beneficially owned: 2,850,000 (b) Percent of class: 10.11% The percentages used herein and in the rest of Item 4 are calculated based upon the 28,182,726 shares of Common Stock issued and outstanding as of September 30, 2002 as reported in the Company's Form 10-Q for the period ending September 30, 2002. (c) (i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 2,850,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 2,850,000 B. Ardsley Partners I (a) Amount beneficially owned: 2,850,000 (b) Percent of class: 10.11% (c) (i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 2,850,000 (iii) Sole power to dispose or direct the disposition: 0- (iv) Shared power to dispose or direct the disposition: 2,850,000 C. Philip J. Hempleman (a) Amount beneficially owned: 2,850,000 (b) Percent of class: 10.11% (c) (i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 2,850,000 (iii) Sole power to dispose or direct the disposition: 0- (iv) Shared power to dispose or direct the disposition: 2,850,000 D. Ardsley Offshore Fund Ltd. 775,000 (a) Amount beneficially owned: (b) Percent of class: 2.75% (c) (i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 775,000 (iii) Sole power to dispose or direct the disposition: 0- (iv) Shared power to dispose or direct the disposition: 775,000 CUSIP No. 67087210 13G Page 13 of 17 Pages E. Ardsley Partners Fund II, L.P. (a) Amount beneficially owned: 725,000 (b) Percent of class: 2.57% (c) (i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 725,000 (iii) Sole power to dispose or direct the disposition: 0- (iv) Shared power to dispose or direct the disposition: 725,000 F. Ardsley Partners Fund I, L.P. (a) Amount beneficially owned: 425,000 (b) Percent of class: 1.51% (c) (i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 425,000 (iii) Sole power to dispose or direct the disposition: 0- (iv) Shared power to dispose or direct the disposition: 425,000 G. Ardsley Partners Institutional Fund, L.P. (a) Amount beneficially owned: 450,000 (b) Percent of class: 1.6% (c) (i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 450,000 (iii) Sole power to dispose or direct the disposition: 0- (iv) Shared power to dispose or direct the disposition: 450,000 H. Augusta Partners L.P. (a) Amount beneficially owned: 475,000 (b) Percent of class: 1.69% (c) (i) Sole power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 475,000 (iii) Sole power to dispose or direct the disposition: 0- (iv) Shared power to dispose or direct the disposition: 475,000 CUSIP No. 67087210 13G Page 14 of 17 Pages Item 5. Ownership of Five Percent or Less of a Class. Not applicable. Item 6. Ownership of More than Five Percent on Behalf of Another Person. Ardsley Advisory Partners, the Investment Manager of Ardsley Offshore Fund Ltd. and the investment advisor of Ardsley Partners Fund II, L.P., Ardsley Partners Fund I, L.P., and Ardsley Partners Institutional Fund, L.P., has the power to direct the affairs of each fund, including decisions respecting the disposition of the proceeds from the sale of shares. Ardsley Partners I is the General Partner of Ardsley Advisory Partners and as such, together with Mr. Hempleman, the Managing Partner of Ardsley Advisory Partners, directs its operations. Ardsley Advisory Partners is also a non-managing member of Augusta Management L.L.C., the Investment Advisor of Augusta Partners L.P., and in this capacity, shares in the power to direct the disposition of the shares. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company. Not applicable. Item 8. Identification and Classification of Members of the Group. See Item 2. Item 9. Notice of Dissolution of Group. Not applicable. CUSIP No. 67087210 13G Page 15 of 17 Pages Item 10. Certification. Each of the Reporting Persons hereby makes the following certification: By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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. CUSIP No. 67087210 13G Page 16 of 17 Pages SIGNATURES After reasonable inquiry and to the best of our knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct. DATED: December 9, 2002 Ardsley Offshore Fund Ltd. By: Neil Glass ----------------------------------------- Vice President and Administrative Manager By: /s/Neil Glass ----------------------------------------- Neil Glass ----------------------------------------- Vice President and Administrative Manager Ardsley Partners Fund II, L.P. By: Ardsley Partners I General Partner By: /s/ Philip J. Hempleman ----------------------- Philip J. Hempleman General Partner Ardsley Partners Fund I, L.P. By: Ardsley Partners I General Partner By: /s/ Philip J. Hempleman ----------------------- Philip J. Hempleman General Partner Ardsley Partners Institutional Fund, L.P. By: Ardsley Partners I General Partner By: /s/ Philip J. Hempleman ----------------------- Philip J. Hempleman General Partner Augusta Partners L.P. By: Howard Singer General Partner By: /s/ Howard Singer ----------------------- Howard Singer General Partner CUSIP No. 67087210 13G Page 17 of 17 Pages Ardsley Advisory Partners By: Ardsley Partners I General Partner By: /s/ Philip J. Hempleman ----------------------- Philip J. Hempleman General Partner Ardsley Partners I By: Philip J. Hempleman Managing Partner By: /s/ Philip J. Hempleman ----------------------- General Partner Philip J. Hempleman, individually By: /s/ Philip J. Hempleman ----------------------- Philip J. Hempleman -----END PRIVACY-ENHANCED MESSAGE-----