FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN 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. Issuer Name and Ticker or Trading Symbol PLUG POWER INC [PLUG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 6, RUE COGNACQ JAY 3. Date of Earliest Transaction (Month/Day/Year) 08/26/2014 (Street) PARIS, I0 75007 4. If Amendment, Date Original Filed(Month/Day/Year) 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 Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, par value $0.01 per share (1) 08/26/2014   C   5,521,676 A (2) 5,561,000 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Series C Redeemable Convertible Preferred Stock

(2)

08/26/2014

C

5,200

05/08/2014

(3)

Common Stock, par value $0.01 per share

5,521,676

(4)

5,231

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/ Pierre-Etienne Franc, Directeur General de la societe of Air Liquide Investissements d'Avenir et de Demonstration		08/28/2014
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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)	Xavier Pontone serves on the board of directors of Plug Power Inc. as the representative of Air Liquide Investissements d'Avenir et de Demonstration.
(2)	5,521,676 shares of Common Stock were acquired on conversion on August 26, 2014 of 5,200 shares of the Series C Redeemable Convertible Preferred Stock acquired on May 16, 2013. At the current exchange rate of .2343 per share, each share of Series C Redeemable Convertible Preferred Stock is convertible into 1,061.86086214255 shares of Common Stock.
(3)	The Series C Redeemable Convertible Preferred Stock does not have an expiration date.
(4)	Pursuant to a Securities Purchase Agreement dated as of May 8, 2013, Air Liquide Investissements d'Avenir et de Demonstration purchased 10,431 shares of Series C Redeemable Convertible Preferred Stock for EURO 2,000,000.

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