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
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

MIDDLETON PAUL B		 2. Issuer Name and Ticker or Trading Symbol

PLUG POWER INC [ PLUG ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
CFO & EVP
(Last)          (First)          (Middle)

C/O PLUG POWER INC., 968 ALBANY SHAKER ROAD		 3. Date of Earliest Transaction (MM/DD/YYYY)

5/18/2023
(Street)

LATHAM, NY 12110		 4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
 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)
Rule 10b5-1(c) Transaction Indication
☐ Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)		2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Performance Stock Option (Right to Buy) (1)$7.87 5/18/2023  A   750000     (2)(3)(4)5/18/2030 Common Stock 750000 $0 750000 D  
Explanation of Responses:
(1) Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.
(2) Up to one-third (1/3) of the shares underlying the performance stock options will vest and become exercisable on each of the first three anniversaries of the grant date, provided that the daily volume weighted average price ("VWAP") of the Company's common stock during any 30 consecutive trading day period in the three year performance period following the grant date of the stock options equals or exceeds certain levels.
(3) One-third (1/3) of the shares underlying the performance stock options will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP during any 30 consecutive trading day period equals $9.84; an additional one-third (1/3) of the shares underlying the options will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP during any 30 consecutive trading day period equals $11.81; and the remaining one-third (1/3) of the shares underlying the options will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP during any 30 consecutive trading day period equals or exceeds $13.77.
(4) There will be no interpolation for the performance stock option if the VWAP falls between any two stock price hurdles. Failure to achieve any of the stock price hurdles applicable to a performance stock option during the three-year performance period will result in applicable options being un-exercisable. The performance-based stock options have a maximum term of seven years from the grant date.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
MIDDLETON PAUL B
C/O PLUG POWER INC.
968 ALBANY SHAKER ROAD
LATHAM, NY 12110

CFO & EVP
Signatures
/s/ Gerard L. Conway, Jr., Attorney-in-Fact5/31/2023
**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 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).
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 control number.
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