FORM 3
        
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
INITIAL STATEMENT OF 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 * Hoefelmann Dirk Ole 2. Date of Event Requiring Statement (MM/DD/YYYY)
9/22/2021 

3. Issuer Name and Ticker or Trading Symbol PLUG POWER INC [PLUG]
(Last)       (First)       (Middle)
C/O PLUG POWER INC.,, 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)
GM, Electrolyzer Solutions /
(Street)
LATHAM, NY 12110      
(City)             (State)             (Zip)
5. 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

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  250000 (1) D   
Common Stock  269  I  401(k) Plan (2)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(MM/DD/YYYY)
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
Stock Option (Right to Buy)   (3) 3/3/2031  Common Stock  250000  $43.81  D   

Explanation of Responses:
(1)  Consists of a restricted stock award made pursuant to Plug Power's 2011 Stock Option and Incentive Plan (the "2011 Plan"). The restricted stock vests in three substantially equal installments, with the first installment vesting on March 3, 2022.
(2)  The reporting person holds 269 shares of common stock in Plug Power Inc.'s 401(k) plan. The information in this report is based on a plan statement as of December 6, 2021.
(3)  Awarded pursuant to the 2011 Plan. This option shall vest and become exercisable in three substantially equal annual installments, with the first installment vesting on March 3, 2022.

Remarks:
Exhibit 24 - Power of Attorney

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Hoefelmann Dirk Ole
C/O PLUG POWER INC.,
968 ALBANY-SHAKER ROAD
LATHAM, NY 12110


GM, Electrolyzer Solutions

Signatures
/s/ Gerard L. Conway, Jr., Attorney-in-Fact 12/28/2021
**Signature of Reporting Person Date
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