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FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person*
Hansen Erik J

(Last)(First)(Middle)
968 ALBANY SHAKER ROAD

(Street)
LATHAMNY12110

(City)(State)(Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
10/28/2009
3. Issuer Name and Ticker or Trading Symbol
PLUG POWER INC [PLUG]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
VP & GM, Motive Power Div
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Plug Power Common Stock 1,000
D
 
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)4. Conversion or Excercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares
Options to Purchase Common Stock 12/28/200810/29/2018 Plug Power Common Stock 50,000 (1) $ 0.86 D  
Options to Purchase Common Stock 05/20/201005/20/2019 Plug Power Common Stock 2,500 (2) $ 0.95 D  
Explanation of Responses:
1. These stock options were fully vested in December 2008.
2. These stock options vest as follows: 834 become exercisable on 5/20/2010; 833 on 5/20/2011 and 833 on 5/20/2012.
/s/ Gerard L. Conway, Jr., Attorney in Fact11/03/2009
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

lingsLIMITED POWER OF ATTORNEY
FOR
SECTION 16(a) FILINGS

Know all by these presents, that the undersigned 
hereby constitutes and appoints each of 
Gerard L. Conway, Jr. and Gerald A. Anderson 
signing singly, the undersigned's only true and 
lawful attorney-in-fact to: 
(1) execute for and on behalf of the undersigned,
in the undersigned's capacity as an officer, 
director and/or stockholder of Plug Power Inc.
(the Company), Forms 3, 4, and 5 and 
amendments thereto in accordance with Section 16(a)
 of the Securities Exchange Act of 1934 
and the rules thereunder; 
(2) do and perform any and all acts for and on behalf
of the undersigned which may be necessary 
or desirable to complete and execute any such
Form 3, 4, or 5 and any amendments thereto and 
timely file such forms with the United States
Securities and Exchange Commission and any 
stock exchange or similar authority; and 
(3) take any other action of any type whatsoever which,
in the opinion of such attorney-
in-fact, may be necessary or desirable in connection 
with the foregoing authority,  it 
being understood that the documents executed by such
attorney-in-fact on behalf of the 
undersigned pursuant to this Power of Attorney
shall be in such form and shall contain 
such terms and conditions as such attorney-in-fact
may approve in such attorney-in-fact's 
discretion. The undersigned hereby grants to each such
attorney-in-fact full power and authority to do and 
perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the 
exercise of any of the rights and powers herein granted,
as fully to all intents and purposes as the 
undersigned might or could do if personally present,
with full power of substitution or 
revocation, hereby ratifying and confirming all that
such attorney-in-fact, or such attorney-in-fact's 
substitute or substitutes, shall lawfully do or cause
to be done by virtue of this Power of 
Attorney and the rights and powers herein granted.
The undersigned acknowledges that the 
foregoing attorneys-in-fact, in serving in such
capacity at the request of the undersigned, are
not assuming, nor is the Company assuming, any of
 the undersigned's responsibilities to comply with 
Section 16 of the Securities Exchange Act of 1934.
This Power of Attorney shall remain in full force and
 effect until the undersigned is no longer 
required to file Forms 3, 4, and 5 with respect
 to the undersigned's holdings of and transactions 
in securities issued by the Company, unless earlier
 revoked by the undersigned in a signed 
writing delivered to the Company.  
This Power of Attorney may be filed with the SEC as a 
confirming statement of the authority granted herein.
IN WITNESS WHEREOF, the undersigned has caused this
Power of Attorney to be 
executed as of this 28th day of October 2009.
                                    
            /s/ Erik J. Hansen
           Erik J. Hansen

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