Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| PLUG POWER INCPLUG · Entity 4258 | Director | June 11, 2026 | June 16, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
PLUG POWER INC
Report date June 11, 2026 · Filed June 16, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 361,318 |
Reported balance
After 2026-06-11 transaction · row 1
1 source rowRow 1 · 2026-06-11 · Grant · Acquired 39,753 · Balance 361,318 F1: Consists of a restricted stock award made pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended, in accordance with the Non-Employee Director Compensation Plan. The restricted stock shall vest in full on the first anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date. |
| Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $2.83 · Expires 2036-06-11 | Direct | 39,753 |
Reported balance
After 2026-06-11 transaction · row 2
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 2 · 2026-06-11 · Grant · Acquired 39,753 · Balance 39,753 F2: Stock option granted pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended, in accordance with the Non-Employee Director Compensation Plan. F3: The options shall vest in full on the first anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date. |
Filing footnotes · ownership attribution and instrument terms
F1: Consists of a restricted stock award made pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended, in accordance with the Non-Employee Director Compensation Plan. The restricted stock shall vest in full on the first anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.
F2: Stock option granted pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended, in accordance with the Non-Employee Director Compensation Plan.
F3: The options shall vest in full on the first anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| June 23, 2020 Filed Jun 26, 2020 00:45 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionPlug Power Common Stock | 29,621 | $2.11 | $62,500.31 |
DisclosureSEC source: 0001104659-20-077004 · a4.xml · nonDerivative · entry 8 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 397,277 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| June 23, 2020 Filed Jun 26, 2020 00:45 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionPlug Power Common Stock | 29,343 | $2.13 | $62,500.59 |
DisclosureSEC source: 0001104659-20-077004 · a4.xml · nonDerivative · entry 7 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 367,656 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| June 23, 2020 Filed Jun 26, 2020 00:45 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionPlug Power Common Stock | 30,000 | $1.76 | $52,800.00 |
DisclosureSEC source: 0001104659-20-077004 · a4.xml · nonDerivative · entry 6 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 338,313 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| June 23, 2020 Filed Jun 26, 2020 00:45 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionPlug Power Common Stock | 30,000 | $2.62 | $78,600.00 |
DisclosureSEC source: 0001104659-20-077004 · a4.xml · nonDerivative · entry 5 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 308,313 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| June 23, 2020 Filed Jun 26, 2020 00:45 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionPlug Power Common Stock | 10,000 | $5.63 | $56,300.00 |
DisclosureSEC source: 0001104659-20-077004 · a4.xml · nonDerivative · entry 4 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 278,313 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| June 23, 2020 Filed Jun 26, 2020 00:45 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionPlug Power Common Stock | 10,000 | $0.38 | $3,800.00 |
DisclosureSEC source: 0001104659-20-077004 · a4.xml · nonDerivative · entry 3 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 268,313 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| June 23, 2020 Filed Jun 26, 2020 00:45 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionPlug Power Common Stock | 10,000 | $1.22 | $12,200.00 |
DisclosureSEC source: 0001104659-20-077004 · a4.xml · nonDerivative · entry 2 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 258,313 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| June 23, 2020 Filed Jun 26, 2020 00:45 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionPlug Power Common Stock | 1,200 | $5.10 | $6,120.00 |
DisclosureSEC source: 0001104659-20-077004 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 248,313 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| June 05, 2020 Filed Jun 9, 2020 21:51 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantStock Option (right to buy) · Derivative | 12,807 | $0.00 Strike: $4.88 | $0.00 |
DisclosureSEC source: 0001104659-20-071537 · a4.xml · derivative · entry 2 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 12,807 Underlying: Common Stock · 12,807 shares Expires 2030-06-05 F2 · derivative.exercise_date: The options vest (100%) on the first anniversary of the grant date . Read SEC document |
| June 05, 2020 Filed Jun 9, 2020 21:51 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 12,807 | $0.00 | $0.00 |
DisclosureSEC source: 0001104659-20-071537 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 247,113 F1 · shares: Consists of a restricted stock unit award made pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. The restricted stock units vest (100%) on the first anniversary of the grant date. Read SEC document |
| April 16, 2020 Filed Apr 20, 2020 20:30 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionStock Option (Right to Buy) · Derivative | 65,000 | $0.00 Strike: $1.93 | $0.00 |
DisclosureSEC source: 0001104659-20-048715 · a4.xml · derivative · entry 3 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 65,000 shares Expires 2021-09-20 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_date: The stock option granted to the Reporting Person is fully vested and exercisable as of the date hereof. Read SEC document |
| April 16, 2020 Filed Apr 20, 2020 20:30 UTC | PLUG POWER INC PLUG · Entity 4258 | SalePlug Power Common Stock | 115,000 | $4.29 | $492,901.50 |
DisclosureSEC source: 0001104659-20-048715 · a4.xml · nonDerivative · entry 2 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 234,306 F1 · shares: Shares sold pursuant to a pre-established 10b5-1 trading plan. F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.17 to $4.55, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range. Read SEC document |
| April 16, 2020 Filed Apr 20, 2020 20:30 UTC | PLUG POWER INC PLUG · Entity 4258 | Exercise / conversionPlug Power Common Stock | 65,000 | $1.93 | $125,450.00 |
DisclosureSEC source: 0001104659-20-048715 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 349,306 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| April 01, 2020 Filed Apr 3, 2020 20:30 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 2,295 | $3.54 | $8,124.30 |
DisclosureSEC source: 0001104659-20-043137 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 284,306 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| January 02, 2020 Filed Jan 6, 2020 21:58 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 2,571 | $3.16 | $8,124.36 |
DisclosureSEC source: 0001104659-20-001591 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 282,011 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| October 01, 2019 Filed Oct 3, 2019 20:19 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 3,089 | $2.63 | $8,124.07 |
DisclosureSEC source: 0001104659-19-052980 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 279,440 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| July 01, 2019 Filed Jul 3, 2019 20:20 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 3,611 | $2.25 | $8,124.75 |
DisclosureSEC source: 0001104659-19-039299 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 276,351 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| May 09, 2019 Filed Jul 2, 2019 00:00 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantStock Option (right to buy) · Derivative | 27,056 | $0.00 Strike: $2.31 | $0.00 |
DisclosureSEC source: 0001104659-19-038782 · a4.xml · derivative · entry 2 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 27,056 Underlying: Common Stock · 27,056 shares Expires 2029-05-09 F2 · security: Options to purchase Common Stock granted in accordance with Plug Power's 2011 Non-Employee Directors Compensation Plan. F3 · derivative.exercise_date: This option shall become fully vested on May 9, 2020. Read SEC document |
| May 09, 2019 Filed Jul 2, 2019 00:00 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 27,056 | $2.31 | $62,499.36 |
DisclosureSEC source: 0001104659-19-038782 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 272,740 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| April 01, 2019 Filed Apr 3, 2019 20:44 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 3,385 | $2.40 | $8,124.00 |
DisclosureSEC source: 0001104659-19-019679 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 245,684 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| January 02, 2019 Filed Jan 4, 2019 21:21 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 6,552 | $1.24 | $8,124.48 |
DisclosureSEC source: 0001104659-19-000811 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 242,299 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| October 01, 2018 Filed Oct 3, 2018 20:51 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 4,097 | $1.92 | $7,866.24 |
DisclosureSEC source: 0001104659-18-060350 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 235,747 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| July 02, 2018 Filed Jul 5, 2018 20:24 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 3,713 | $2.02 | $7,500.26 |
DisclosureSEC source: 0001104659-18-044025 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 231,650 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| May 16, 2018 Filed May 18, 2018 23:38 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantCommon Stock Options · Derivative | 29,621 | $0.00 Strike: $2.11 | $0.00 |
DisclosureSEC source: 0001104659-18-034576 · a4.xml · derivative · entry 2 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 29,621 Underlying: Common Stock · 29,621 shares Expires 2028-05-16 F2 · security: Options to purchase Common Stock granted in accordance with Plug Power's 2011 Non-Employee Directors Compensation Plan. F3 · derivative.exercise_date: This option shall become fully vested on May 16, 2019. Read SEC document |
| May 16, 2018 Filed May 18, 2018 23:38 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 29,621 | $2.11 | $62,500.31 |
DisclosureSEC source: 0001104659-18-034576 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 227,937 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| April 02, 2018 Filed Apr 4, 2018 19:31 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 3,968 | $1.89 | $7,499.52 |
DisclosureSEC source: 0001104659-18-022404 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 198,316 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| January 02, 2018 Filed Jan 4, 2018 20:55 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 3,178 | $2.36 | $7,500.08 |
DisclosureSEC source: 0001104659-18-000759 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 194,348 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| October 02, 2017 Filed Oct 10, 2017 20:31 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 2,874 | $2.61 | $7,501.14 |
DisclosureSEC source: 0001104659-17-061587 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 191,170 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| July 03, 2017 Filed Sep 5, 2017 16:47 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 3,676 | $2.04 | $7,499.04 |
DisclosureSEC source: 0001104659-17-055362 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 188,296 F1 · price: Quarterly Stock compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| June 28, 2017 Filed Jun 30, 2017 22:09 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantCommon Stock Options · Derivative | 29,343 | $0.00 Strike: $2.13 | $0.00 |
DisclosureSEC source: 0001104659-17-043053 · a4.xml · derivative · entry 2 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 29,343 Underlying: Common Stock · 29,343 shares Expires 2027-06-28 F2 · security: Options to purchase Common Stock granted in accordance with Plug Power's 2011 Non-Employee Directors Compensation Plan. F3 · derivative.exercise_date: This option shall become fully vested on June 28, 2018. Read SEC document |
| June 28, 2017 Filed Jun 30, 2017 22:09 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 29,343 | $2.13 | $62,500.59 |
DisclosureSEC source: 0001104659-17-043053 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 184,620 F1 · price: Compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| April 03, 2017 Filed Apr 5, 2017 20:32 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 5,435 | $1.38 | $7,500.30 |
DisclosureSEC source: 0001104659-17-021694 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 155,277 F1 · price: Quarterly Stock compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| January 03, 2017 Filed Jan 5, 2017 21:18 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 6,250 | $1.20 | $7,500.00 |
DisclosureSEC source: 0001104659-17-000928 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 149,842 F1 · price: Quarterly Stock compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
| October 03, 2016 Filed Oct 18, 2016 16:21 UTC | PLUG POWER INC PLUG · Entity 4258 | GrantPlug Power Common Stock | 4,386 | $1.71 | $7,500.06 |
DisclosureSEC source: 0001104659-16-150671 · a4.xml · nonDerivative · entry 1 HELMER MAUREEN O · CIK 0001279977 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 143,592 F1 · price: Quarterly Stock compensation awarded to directors pursuant to Plug Power's 2011 Non-Employee Directors Compensation Plan. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.