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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1. Name and Address of Reporting Person * FiveT Capital Holdings AG   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) C/O RABER TREUHAND GMBH, CHURERSTRASSE 98 3. Date of Earliest Transaction (Month/Day/Year) 03/15/2017 (Street) PFAFFIKON, V8 8330 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

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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	$ 0	03/15/2017		A		8,455		(1)	(1)	Common Stock	8,455	$ 0	1,866,711	D (2) (3) (5)
Series C Redeemable Convertible Preferred Stock	$ 0	03/15/2017		A		4,203		(1)	(1)	Common Stock	4,203	$ 0	928,022	I	See Footnotes (2) (4) (5)
Series C Redeemable Convertible Preferred Stock	$ 0	06/15/2017		A		4,187		(1)	(1)	Common Stock	4,187	$ 0	1,870,898	D (2) (3) (5)
Series C Redeemable Convertible Preferred Stock	$ 0	06/15/2017		A		2,081		(1)	(1)	Common Stock	2,081	$ 0	930,103	I	See Footnotes (2) (4) (5)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
FiveT Capital Holdings AG C/O RABER TREUHAND GMBH CHURERSTRASSE 98 PFAFFIKON, V8 8330	X

Signatures

/s/ FiveT Capital Holdings AG, by Johannes Minho Roth, Managing Director		07/07/2017
**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)	The Series C Redeemable Convertible Preferred Stock (the "Series C Preferred Stock") is convertible at any time at the option of the holder into shares of the Issuer's Common Stock at a conversion price per share of $0.2343, subject to certain adjustments. The Series C Preferred Stock has no expiration date.
(2)	On March 15, 2017, FiveT Capital Holdings AG, a limited liability company existing under the laws of Switzerland ("FiveT Capital Holdings"), and Five More Special Situations Fund Limited, a Cayman Islands company ("FiveMore Fund"), acquired 8,455 shares and 4,203 shares, respectively, of the Series C Preferred Stock for payment of a dividend; and on June 15, 2017, FiveT Capital Holdings and FiveMore Fund, acquired 4,187 shares and 2,081 shares, respectively, of the Series C Preferred Stock for payment of a dividend.
(3)	These shares are held directly by FiveT Capital Holdings.
(4)	These shares are held directly by FiveMore Fund. FiveT Capital AG ("FiveT Capital"), a wholly-owned subsidiary of FiveT Capital Holdings, provides investment advisory services to FiveMore Fund.
(5)	Johannes Minho Roth is the Managing Director of FiveT Capital Holdings and has equity interests in each of FiveT Capital Holdings and FiveMore Fund. Mr. Roth is a member of the Board of Directors of the Issuer. Each of FiveT Capital Holdings, FiveT Capital and FiveMore Fund disclaims beneficial ownership of the shares of Series C Preferred Stock, except to the extent of its respective pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of any of such shares.

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