-----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, KG4NiMsN00WEclChiGCmeaL/BaV0VZoyUtiMsl8+nAmv1K+W8tWxuf4i7uIzwj59 oW37VhHaTcmpYNQO6RYhkw== 0000902664-07-000870.txt : 20070214 0000902664-07-000870.hdr.sgml : 20070214 20070214131253 ACCESSION NUMBER: 0000902664-07-000870 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20070214 DATE AS OF CHANGE: 20070214 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: HydroGen CORP CENTRAL INDEX KEY: 0001124394 STANDARD INDUSTRIAL CLASSIFICATION: ENGINES & TURBINES [3510] IRS NUMBER: 860965692 STATE OF INCORPORATION: NV FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-61797 FILM NUMBER: 07617326 BUSINESS ADDRESS: STREET 1: 1801 ROUTE 51 SOUTH CITY: JEFFERSON HILLS STATE: PA ZIP: 15025 BUSINESS PHONE: 480-759-9400 MAIL ADDRESS: STREET 1: 1801 ROUTE 51 SOUTH CITY: JEFFERSON HILLS STATE: PA ZIP: 15025 FORMER COMPANY: FORMER CONFORMED NAME: CHISTE CORP DATE OF NAME CHANGE: 20040819 FORMER COMPANY: FORMER CONFORMED NAME: DYNA CAM DATE OF NAME CHANGE: 20000921 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 sc13g.txt HYDROGEN CORP. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ---------------- SCHEDULE 13G ---------------- INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Hydrogen Corporation (NAME OF ISSUER) Common Stock, par value $0.001 per share (TITLE OF CLASS OF SECURITIES) 44887Q108 (CUSIP NUMBER) December 31, 2006 (Date of Event which requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule 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 the purpose 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. 44887Q108 13G PAGE 2 of 17 PAGES - ------------------------------------------------------------------------------ (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 278,000 OWNED BY ---------------------------------------------------------------- EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ---------------------------------------------------------------- PERSON WITH (8) SHARED DISPOSITIVE POWER 278,000 - ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 278,000 - ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.18% - ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN - ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 44887Q108 13G PAGE 3 of 17 PAGES - ------------------------------------------------------------------------------- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 174,000 OWNED BY ---------------------------------------------------------------- EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ---------------------------------------------------------------- PERSON WITH (8) SHARED DISPOSITIVE POWER 174,000 - ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 174,000 - ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.36% - ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN - ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 44887Q108 13G PAGE 4 of 17 PAGES - ------------------------------------------------------------------------------- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Ardsley Partners Renewable Energy 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 100,000 OWNED BY ---------------------------------------------------------------- EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ---------------------------------------------------------------- PERSON WITH (8) SHARED DISPOSITIVE POWER 100,000 - ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 100,000 - ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.78% - ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN - ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 44887Q108 13G PAGE 5 of 17 PAGES - ------------------------------------------------------------------------------- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 340,000 OWNED BY ---------------------------------------------------------------- EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ---------------------------------------------------------------- PERSON WITH (8) SHARED DISPOSITIVE POWER 340,000 - ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 340,000 - ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.66% - ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** CO - ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 44887Q108 13G PAGE 6 of 17 PAGES - ------------------------------------------------------------------------------- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 900,000 OWNED BY ---------------------------------------------------------------- EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ---------------------------------------------------------------- PERSON WITH (8) SHARED DISPOSITIVE POWER 900,000 - ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 900,000 - ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 7.05% - ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN; IA - ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 44887Q108 13G PAGE 7 of 17 PAGES - ------------------------------------------------------------------------------- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 452,000 OWNED BY ---------------------------------------------------------------- EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ---------------------------------------------------------------- PERSON WITH (8) SHARED DISPOSITIVE POWER 452,000 - ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 452,000 - ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 3.54% - ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN - ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 44887Q108 13G PAGE 8 of 17 PAGES - ------------------------------------------------------------------------------- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 900,000 OWNED BY ---------------------------------------------------------------- EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ---------------------------------------------------------------- PERSON WITH (8) SHARED DISPOSITIVE POWER 900,000 - ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 900,000 - ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 7.05% - ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** IN - ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 44887Q108 13G PAGE 9 of 17 PAGES - ------------------------------------------------------------------------------ ITEM 1(a). NAME OF ISSUER: The name of the issuer is Hydrogen Corporation (the "Company"). ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 1801 Route 51 South, Jefferson Hills, PA 15025 ITEM 2(a). NAME OF PERSON FILING: This statement is filed by: (i) Ardsley Partners Fund II, L.P., a Delaware limited partnership ("AP II"), with respect to the shares of Common Stock, par value $0.001 per share ("Common Stock") directly owned by it; (ii) Ardsley Partners Institutional Fund, L.P., a Delaware limited partnership ("Ardsley Institutional"), with respect to the shares of Common Stock directly owned by it; (iii) Ardsley Partners Renewable Energy Fund, L.P., a Delaware limited partnership ("Ardsley Energy"), with respect to the shares of Common Stock directly owned by it; (iv) Ardsley Offshore Fund Ltd., a British Virgin Islands Corporation ("Ardsley Offshore"), with respect to the shares of Common Stock directly owned by it; (v) Ardsley Advisory Partners, a New York general partnership ("Ardsley") which serves as Investment Manager of Ardsley Offshore and the Investment Adviser of AP II, Ardsley Institutional, Ardsley Energy and certain managed accounts, with respect to the shares of Common Stock directly owned by Ardsley Offshore, AP II, Ardsley Institutional, Ardsley Energy and the managed accounts; (vi) Ardsley Partners I, a New York general partnership ("Ardsley Partners") which serves as General Partner of AP II, Ardsley Institutional and Ardsley Energy; and (vii) Philip J. Hempleman ("Mr. Hempleman"), the Managing Partner of Ardsley and Ardsley Partners, with respect to the shares of Common Stock owned by AP II, Ardsley Institutional, Ardsley Energy, Ardsley Offshore and the managed accounts and with respect to the shares of Common Stock he owns individually. 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. ITEM 2(b). ADDRESS OF PRINCIPAL OFFICE OR, IF NONE, RESIDENCE: The address of the business office of each of the Reporting Persons, with the exception of Ardsley Offshore, is 262 Harbor Drive, Stamford, Connecticut 06902. The address of the registered office of Ardsley Offshore is Romasco Place, Wickhams Cay 1, Roadtown Tortola, British Virgin Islands. ITEM 2(c). CITIZENSHIP: AP II, Ardsley Institutional and Ardsley Energy are Delaware limited partnerships. Ardsley Offshore is a British Virgin Islands Corporation. Ardsley and Ardsley Partners are New York general partnerships. Mr. Hempleman is a United States Citizen. CUSIP No. 44887Q108 13G PAGE 10 of 17 PAGES ITEM 2(d). TITLE OF CLASS OF SECURITIES: Class A Common Stock, par value $0.01 per share ITEM 2(e). CUSIP NUMBER: 44887Q108 ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b), OR 13d-2(b), 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 (e) [ ] Investment Adviser registered under Section 203 of the Investment Advisers Act of 1940 (f) [ ] Employee Benefit Plan, Pension Fund which is subject to the provisions of the Employee Retirement Income Security Act of 1974 or Endowment Fund; see Rule 13d-1(b)(1)(ii)(F) (g) [ ] Parent Holding Company, in accordance with Rule 13d-1(b)(ii)(G); see item 7 (h) ( ) Group, in accordance with Rule 13d-1(b)(1)(ii)(H) If this statement is filed pursuant to Rule 13d-1(c), check the box. [X] CUSIP No. 44887Q108 13G PAGE 11 of 17 PAGES ITEM 4. OWNERSHIP. A. Ardsley Partners Fund II, L.P. (a) Amount beneficially owned: 278,000 (b) Percent of class: 2.18%. (The percentages used herein and in the rest of Item 4 are calculated based upon the 12,769,904 shares of Common Stock issued and outstanding as per the Company's Form 10-Q for the period ended November 1, 2006, as filed on November 14, 2006.) (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 278,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 278,000 B. Ardsley Partners Institutional Fund, L.P. (a) Amount beneficially owned: 174,000 (b) Percent of class: 1.36% (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 174,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 174,000 C. Ardsley Partners Renewable Energy Fund, L.P. (a) Amount beneficially owned: 100,000 (b) Percent of class: 0.78% (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 100,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 100,000 D. Ardsley Offshore Fund Ltd. (a) Amount beneficially owned: 340,000 (b) Percent of class: 2.66% (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 340,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 340,000 E. Ardsley Advisory Partners (a) Amount beneficially owned: 900,000 (b) Percent of class: 7.05% (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 900,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 900,000 F. Ardsley Partners I (a) Amount beneficially owned: 452,000 (b) Percent of class: 3.54% (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 452,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 452,000 G. Philip J. Hempleman (a) Amount beneficially owned: 900,000 (b) Percent of class: 7.05% (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 900,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 900,000 CUSIP No. 44887Q108 13G PAGE 12 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, the Investment Manager of Ardsley Offshore and the Investment Adviser of certain managed accounts, has the power to vote and direct the disposition of the proceeds from the sale of the shares of Common Stock owned by Ardsley Offshore and the managed accounts, and accordingly may be deemed the direct "beneficial owner" of such shares of Common Stock. Ardsley, the Investment Adviser of AP II, Ardsley Institutional and Ardsley Energy, shares the power to vote and direct the disposition of the proceeds from the sale of the shares of Common Stock owned by AP II, Ardsley Institutional and Ardsley Energy, and, accordingly, may be deemed the direct "beneficial owner" of such shares of Common Stock. Ardsley Partners, the General Partner of AP II, Ardsley Institutional and Ardsley Energy, shares the power to vote and direct the disposition of the shares of Common Stock owned by AP II, Ardsley Institutional and Ardsley Energy, and, accordingly, may be deemed the direct "beneficial owner" of such shares of Common Stock. Mr. Hempleman is the Managing Partner of Ardsley and Ardsley Partners and in that capacity directs their operations and therefore may be deemed to be the indirect "beneficial owner" of the shares of Common Stock owned by Ardsley Offshore, AP II, Ardsley Institutional, Ardsley Energy and the managed accounts. 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. Not applicable. ITEM 9. NOTICE OF DISSOLUTION OF GROUP. Not applicable. CUSIP No. 44887Q108 13G PAGE 13 of 17 PAGES ITEM 10. CERTIFICATION. Each of the Reporting Persons hereby makes the following certification: By signing below I certify, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business, were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect. CUSIP No. 44887Q108 13G PAGE 14 of 17 PAGES SIGNATURE After reasonable inquiry and to the best of their knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct. DATED: as of February 14, 2007 ARDSLEY PARTNERS FUND II, L.P. BY: ARDSLEY PARTNERS I, GENERAL PARTNER BY: /s/ Steve Napoli ---------------------------------------- Steve Napoli General Partner ARDSLEY PARTNERS INSTITUTIONAL FUND, L.P. BY: ARDSLEY PARTNERS I, GENERAL PARTNER BY: /s/ Steve Napoli ---------------------------------------- Steve Napoli General Partner ARDSLEY PARTNERS RENEWABLE ENERGY FUND, L.P. BY: ARDSLEY PARTNERS I, GENERAL PARTNER BY: /s/ Steve Napoli ---------------------------------------- Steve Napoli General Partner ARDSLEY OFFSHORE FUND LTD. BY: /s/ Neil Glass ---------------------------------------- Neil Glass Vice-President and Administrative Manager ARDSLEY ADVISORY PARTNERS BY: ARDSLEY PARTNERS I GENERAL PARTNER BY: /s/ Steve Napoli ---------------------------------------- Steve Napoli General Partner CUSIP No. 44887Q108 13G PAGE 15 of 17 PAGES ARDSLEY PARTNERS I BY: /s/ Steve Napoli ---------------------------------------- Steve Napoli General Partner PHILIP J. HEMPLEMAN, INDIVIDUALLY BY: /s/ Steve Napoli* ---------------------------------------- Steve Napoli As attorney in fact for Philip J. Hempleman * Evidence of Power of Attorney was filed with the Schedule 13G/A filed on February 15, 2006 (Acc-no: 0000902664-06-000895) and is incorporated by reference into this filing. CUSIP No. 44887Q108 13G PAGE 16 of 17 PAGES EXHIBIT 1 JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1) The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him, her or it contained herein, but shall not be responsible for the completeness and accuracy of the information concerning the other entities or persons, except to the extent that he, she or it knows or has reason to believe that such information is inaccurate. Dated as of February 14, 2007 ARDSLEY PARTNERS FUND II, L.P. BY: ARDSLEY PARTNERS I, GENERAL PARTNER BY: /s/ Steve Napoli ----------------------------------- Steve Napoli General Partner ARDSLEY PARTNERS INSTITUTIONAL FUND, L.P. BY: ARDSLEY PARTNERS I, GENERAL PARTNER BY: /s/ Steve Napoli ----------------------------------- Steve Napoli General Partner ARDSLEY PARTNERS RENEWABLE ENERGY FUND, L.P. BY: ARDSLEY PARTNERS I, GENERAL PARTNER BY: /s/ Steve Napoli ----------------------------------- Steve Napoli General Partner ARDSLEY OFFSHORE FUND LTD. BY: /s/ Neil Glass ----------------------------------- Neil Glass Vice-President and Administrative Manager CUSIP No. 44887Q108 13G PAGE 17 of 17 PAGES ARDSLEY ADVISORY PARTNERS By: ARDSLEY PARTNERS I GENERAL PARTNER BY: /s/ Steve Napoli ----------------------------------- Steve Napoli General Partner ARDSLEY PARTNERS I BY: /s/ Steve Napoli ----------------------------------- Steve Napoli General Partner PHILIP J. HEMPLEMAN, INDIVIDUALLY BY: /s/ Steve Napoli * ----------------------------------- Steve Napoli Attorney-in-fact for Philip J. Hempleman * Evidence of Power of Attorney was filed with the Schedule 13G/A filed on February 15, 2006 (Acc-no: 0000902664-06-000895) and is incorporated by reference into this filing. -----END PRIVACY-ENHANCED MESSAGE-----