Ownership Submission
FORM 3
 UNITED 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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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Corless Adrian J
 2. Date of Event Requiring Statement (Month/Day/Year)
02/09/2010		 3. Issuer Name and Ticker or Trading Symbol
PLUG POWER INC [PLUG]
(Last)
(First)
(Middle)
968 ALBANY SHAKER ROAD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Technology Officer
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

LATHAM, NY 12110		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially 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 83,729
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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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 Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Options to Purchase Common Stock 04/04/2007 04/04/2017 Plug Power Common Stock 30,000 (1) $ 3.24 D  
Options to Purchase Common Stock 07/30/2008 07/30/2018 Plug Power Common Stock 27,000 (2) $ 2.42 D  
Options to Purchase Common Stock 05/20/2010 05/20/2019 Plug Power Common Stock 2,500 (3) $ 0.95 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Corless Adrian J
968 ALBANY SHAKER ROAD
LATHAM, NY 12110		       Chief Technology Officer  

Signatures

/s/ Gerard L. Conway, Jr., Attorney in Fact 02/25/2010
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) These stock options were fully vested as of December 2008.
(2) These stock options were fully vested as of December 2008.
(3) The stock options vest as follows: 834 shares become exercisable on May 20, 2010; 833 shares become exercisable on May 20, 2011; 833 shares become exercisable on May 20, 2012.

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