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 *
  Air Liquide Investissements d'Avenir et de Demonstration
 2. Date of Event Requiring Statement (Month/Day/Year)
10/23/2013		 3. Issuer Name and Ticker or Trading Symbol
PLUG POWER INC [PLUG]
(Last)
(First)
(Middle)
6 RUE COGNACQ JAY		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PARIS, I0 75007		 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)
Common Stock 39,324
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
Series C Redeemable Convertible Preferred Stock   (1)   (1) Common Stock 10,431 $ (2) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Air Liquide Investissements d'Avenir et de Demonstration
6 RUE COGNACQ JAY
PARIS, I0 75007		   X      

Signatures

/s/ Eric Sebellin, Directeur de la soci?t? of Air Liquide Investissements d'Avenir et de Demonstration 11/12/2013
**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) Convertible at the option of Air Liquide Investissements d'Avenir et de Demonstration's into shares of Common Stock at the conversion price on the earlier of (1) on or after May 8, 2014 or (2) any liquidation, dissolution or winding up of the Company, any sale, consolidation or merger of the Company resulting in a change of control, or any sale or other transfer of all or substantially all of the assets of the Company. There is no expiration date for conversion.
(2) The conversion price is equal to $0.248794 per share and is subject to certain adjustments.
 
Remarks:
Xavier Pontone serves on the board of directors of Plug Power Inc. as the representative of Air Liquide Investissements d'Avenir et de Demonstration.

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