-----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, Ttc3Sunh6DLOQZ1Nd+w6mWRgQQG4msIHQHp6m6xfF1FkQoG5N18EGzYGDucchkDq J7s9dNkL68VGxN8L34j88Q== 0000902664-06-000841.txt : 20060215 0000902664-06-000841.hdr.sgml : 20060215 20060214215002 ACCESSION NUMBER: 0000902664-06-000841 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20060215 DATE AS OF CHANGE: 20060214 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: YOUBET COM INC CENTRAL INDEX KEY: 0000814055 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-MISCELLANEOUS AMUSEMENT & RECREATION [7990] IRS NUMBER: 954627253 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-78294 FILM NUMBER: 06619549 BUSINESS ADDRESS: STREET 1: 5901 DE SOTO AVE. STREET 2: - CITY: WOODLAND HILLS STATE: CA ZIP: 91367 BUSINESS PHONE: 818-668-2100 MAIL ADDRESS: STREET 1: 5901 DE SOTO AVE. STREET 2: - CITY: WOODLAND HILLS STATE: CA ZIP: 91367 FORMER COMPANY: FORMER CONFORMED NAME: YOU BET INTERNATIONAL INC DATE OF NAME CHANGE: 19960104 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/A 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/A 1 sc13ga.txt YOUBET.COM, INC. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ---------------- SCHEDULE 13G ---------------- Amendment No. 1 INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 YOUBET.COM, Inc. (NAME OF ISSUER) Common Stock, $0.001 par value (TITLE OF CLASS OF SECURITIES) 987413101 (CUSIP NUMBER) December 31, 2005 (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 16 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. 987413101 13G/A Page 2 of 16 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 New York - ----------------------------------------------------------------------------- NUMBER OF (5) SOLE VOTING POWER 0 SHARES ______________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 1,922,000 OWNED BY ______________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ______________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 1,922,000 - ----------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,922,000 - ----------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ----------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.76% - ----------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN; IA - ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 987413101 13G/A Page 3 of 16 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 New York - ----------------------------------------------------------------------------- NUMBER OF (5) SOLE VOTING POWER 0 SHARES ______________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 974,500 OWNED BY ______________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ______________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 974,500 - ----------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 974,500 - ----------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ----------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.92% - ----------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN - ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 987413101 13G/A Page 4 of 16 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 190,000 SHARES ______________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 1,922,000 OWNED BY ______________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 190,000 REPORTING ______________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 1,922,000 - ----------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,112,000 - ----------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ----------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.32% - ----------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** IN - ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 987413101 13G/A Page 5 of 16 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 926,000 OWNED BY ______________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ______________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 926,000 - ----------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 926,000 - ----------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ----------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.77% - ----------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** CO - ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 987413101 13G/A Page 6 of 16 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 558,500 OWNED BY ______________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ______________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 558,500 - ----------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 558,500 - ----------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ----------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.67% - ----------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN - ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 987413101 13G/A Page 7 of 16 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 416,000 OWNED BY ______________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ______________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 416,000 - ----------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 416,000 - ----------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] - ----------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.25% - ----------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN - ----------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 987413101 13G/A Page 8 of 16 Pages The Schedule 13G filed on February 14, 2006 is hereby amended by this Amendment No. 1 to the Schedule 13G. ITEM 1(a). NAME OF ISSUER: The name of the issuer is YOUBET.COM, Inc. (the "Company"). ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 5901 De Soto Avenue Woodland Hills, California 91367 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 (defined in Item 2(d) below) 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 Offshore Fund Ltd., a British Virgin Islands Corporation ("Ardsley Offshore"), with respect to the shares of Common Stock directly owned by it; (iv) Ardsley Advisory Partners, a New York general partnership ("Ardsley") which serves as Investment Manager of Ardsley Offshore, and as Investment Adviser of AP II, Ardsley Institutional and certain managed accounts, with respect to the Common Stock directly owned by Ardsley Offshore, AP II, Ardsley Institutional and the managed accounts; (v) Ardsley Partners I, a New York general partnership ("Ardsley Partners") which serves as General Partner of Ardsley, AP II and Ardsley Institutional; and (vi) Philip J. Hempleman ("Mr. Hempleman"), the managing partner of Ardsley and of Ardsley Partners and may, by virtue of his position as managing partner, be deemed to have power to direct the voting and disposition of the Common Stock held or controlled by Ardsley, Ardsley Partners, AP II, Ardsley Institutional, Ardsley Offshore and the managed accounts. Mr. Hempleman disclaims beneficial ownership of the Common Stock reported herein, other than the portion of such shares which relates to his individual economic interest in AP II. 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 business office of Ardsley Offshore is Romasco Place, Wickhams Cay 1, Roadtown Tortola, British Virgin Islands. ITEM 2(c). CITIZENSHIP: Ardsley and Ardsley Partners are New York general partnerships. AP II and Ardsley Institutional are Delaware limited partnerships. Ardsley Offshore is a British Virgin Islands Corporation. Mr. Hempleman is a United States Citizen. ITEM 2(d). TITLE OF CLASS OF SECURITIES: Common Stock, $0.001 par value ("Common Stock") ITEM 2(e). CUSIP NUMBER: 987413101 CUSIP No. 987413101 13G/A Page 9 of 16 Pages 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. 987413101 13G/A Page 10 of 16 Pages ITEM 4. OWNERSHIP. A. Ardsley Advisory Partners (a) Amount beneficially owned: 1,922,000 (b) Percent of class: 5.76% The percentages used herein and in the rest of Item 4 are calculated based upon the 33,392,000 shares of Common Stock issued and outstanding as of September 30, 2005 as reflected on Bloomberg. (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 1,922,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 1,922,000 B. Ardsley Partners I (a) Amount beneficially owned: 974,500 (b) Percent of class: 2.92% (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 974,500 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 974,500 C. Philip J. Hempleman (a) Amount beneficially owned: 2,112,000 (b) Percent of class: 6.32% (c) (i) Sole Power to vote or direct the vote: 190,000 (ii) Shared power to vote or direct the vote:1,922,000 (iii) Sole power to dispose or direct the disposition: 190,000 (iv) Shared power to dispose or direct the disposition: 1,922,000 D. Ardsley Offshore Fund Ltd. (a) Amount beneficially owned: 926,000 (b) Percent of class: 2.77% (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 926,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 926,000 E. Ardsley Partners Fund II, L.P. (a) Amount beneficially owned: 558,500 (b) Percent of class: 1.67%. (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 558,500 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 558,500 F. Ardsley Partners Institutional Fund, L.P. (a) Amount beneficially owned: 416,000 (b) Percent of class: 1.25% (c) (i) Sole Power to vote or direct the vote: -0- (ii) Shared power to vote or direct the vote: 416,000 (iii) Sole power to dispose or direct the disposition: -0- (iv) Shared power to dispose or direct the disposition: 416,000 CUSIP No. 987413101 13G/A Page 11 of 16 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 and Ardsley Institutional 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 and Ardsley Institutional, and accordingly may be deemed the direct "beneficial owner" of such shares of Common Stock. Ardsley Partners, the General Partner of AP II and Ardsley Institutional shares the power to vote and direct the disposition of the shares of Common Stock owned by AP II and Ardsley Institutional, 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 and the managed accounts. Mr. Hempleman also has the power to vote and direct the disposition of the proceeds from the sale of the shares of Common Stock that he owns individually. 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. 987413101 13G/A Page 12 of 16 Pages ITEM 10. CERTIFICATION. (if filing pursuant to Rule 13d-1(b)) By signing below I certify, to the best of their 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. 987413101 13G/A Page 13 of 16 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, 2006 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 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. 987413101 13G/A Page 14 of 16 Pages ARDSLEY PARTNERS I BY: STEVE NAPOLI GENERAL PARTNER BY:/s/ Steve Napoli* ----------------------- Steve Napoli General Partner PHILIP J. HEMPLEMAN, INDIVIDUALLY BY:/s/ Steve Napoli* ----------------------- Steve Napoli CUSIP No. 987413101 13G/A Page 15 of 16 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/A is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G/A 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, 2006 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 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. 987413101 13G/A Page 16 of 16 Pages ARDSLEY PARTNERS I BY: STEVE NAPOLI GENERAL PARTNER 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 filed on February 14, 2006 and incorporated by reference into this filing. -----END PRIVACY-ENHANCED MESSAGE-----