PLUG POWER INC

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Entry into a Material Definitive Agreement

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Submission of Matters to a Vote of Security Holders

Regulation FD Disclosure

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Specialized Disclosure Report

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Annual Report Scanned (Paper)

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

Other Events

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Other Events

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Submission of Matters to a Vote of Security Holders

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Entry into a Material Definitive Agreement

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Other Events

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Entry into a Material Definitive Agreement

Regulation FD Disclosure

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Regulation FD Disclosure

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

No description available

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

No description available

Annual Report Scanned (Paper)

No description available

No description available

Specialized Disclosure Report

Automatic Shelf Registration

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d) (amendment)

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

No description available

Prospectus Supplement for Primary Offering

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

General form for quarterly reports under Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

No description available

General form for quarterly reports under Section 13 or 15(d)

Annual Report Scanned (Paper)

Annual report pursuant to Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

General form for quarterly reports under Section 13 or 15(d)

Annual Report Scanned (Paper)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d) (amendment)

No description available

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

General form for quarterly reports under Section 13 or 15(d)

Automatic Shelf Registration

General form for quarterly reports under Section 13 or 15(d)

Letter from the SEC

Correspondence with the SEC

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Marsh Andrew

BONNEY MARK J

Joggerst Patrick

Kenausis Gregory

Angle Colin M

Haycraft Benjamin

Haycraft Benjamin

Haycraft Benjamin

Haycraft Benjamin

Haycraft Benjamin

Angle Colin M

Angle Colin M

BONNEY MARK J

Haycraft Benjamin

Joggerst Patrick

Kenausis Gregory

Marsh Andrew

Crespo Jose Luis

Fullerton Dean