Plug Power, Inc.: shareholders and insiders
Price
$1.11
November 13, 2026Market cap $1.5B
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- The full history: 17 fiscal years, from 2009
- The estimated fair value, with its range and its certainty
- The full analysis, 18 a month
- More questions to the chat on its filings
- Excel with every year
- An email when it reports, changes its dividend or an officer buys
Sign in with a free account to see the last 5 fiscal years.
Notes on these figures
- The share price has fallen 26% since Nov 9, 2026, when the 10-Q these figures come from was filed ($1.50 then, $1.11 on Nov 13, 2026). The figures date from before that move.10-Q
- The interest the company pays is far more than the debt we can read would cost, so part of its borrowing is missing from the figures. We leave out the debt, net cash, enterprise value and the multiples built on them.
Insiders and their shares
Purchases and sales by officers and directors, from their own Form 4 filings.
Reading the newest filings from the SEC. This part fills in on its own in a few seconds.
Major holders (over 5%)
Whoever comes to own more than 5% of a class of shares reports it to the SEC on Schedule 13D or 13G. Here is each holder's latest filing.
Fell to 5% or less (3)
Holders whose latest filing says they hold 5% or less. After it they need not file again, so what they hold today is not known.
From the Schedule 13D and 13G filed with the SEC since Dec 18, 2024, when they became structured data. A holder who has filed nothing since then is not shown here. A 13D is updated within two business days of any material change, a 13G up to 45 days after the quarter of the change, so the shares are those of the filing. The large managers also appear in the 13Fs.
Well-known managers
Which of the about 30 investment managers we track held the shares at the quarter end, and what they changed from the quarter before.
- Citadel Advisors (Griffin)In the quarter×28.1
- D.E. ShawIn the quarter-55%
- Renaissance TechnologiesIn the quarter
- Millennium Mgmt (Englander)In the quarter+34%
- Point72 (Cohen)In the quarter-8.4%
- Coatue ManagementIn the quarter
- Bridgewater (Dalio)In the quarter
- AQR CapitalIn the quarter+9.8%
| Manager | Shares | In the quarter | Value | % of their portfolio |
|---|---|---|---|---|
| Citadel Advisors (Griffin) | 24.15M | ×28.1 | $65M | 0.04% |
| D.E. Shaw | 21.94M | -55% | $60M | 0.04% |
| Renaissance Technologies | – | – | 0.04% | |
| Millennium Mgmt (Englander) | 13.70M | +34% | $37M | 0.03% |
| Point72 (Cohen) | 1.87M | -8.4% | $5.1M | 0.01% |
| Coatue Management | 2.55M | $6.9M | 0.01% | |
| Bridgewater (Dalio) | 137.8K | $400.0K | 0.00% | |
| AQR Capital | 42.2K | +9.8% | $100.0K | 0.00% |
From the 13Fs managers file with the SEC up to 45 days after each quarter end. They show only long positions on that day, not short sales or what has changed since. No recent 13F: Pershing Square (Ackman), Scion (Burry).
Short interest
How many of the company's shares have been sold borrowed and not yet bought back, twice a month.
On Oct 15, 2026, 20.9% of its shares outstanding were held short, +2.6% since the report before.
- Shares held short
- 292M
- 20.9%
- Since the report before285M on Sep 30, 2026
- +2.6%
- 5.7
- 50.94M
- More days to cover thanof 4,578 US-listed companies with enough volume
- 68%
- Report date
- Oct 15, 2026
- Oct 31, 2023: Shares held short 145M
- Nov 15, 2023: Shares held short 149M
- Nov 30, 2023: Shares held short 155M
- Dec 15, 2023: Shares held short 158M
- Dec 29, 2023: Shares held short 162M
- Jan 12, 2024: Shares held short 158M
- Jan 31, 2024: Shares held short 184M
- Feb 15, 2024: Shares held short 171M
- Feb 29, 2024: Shares held short 160M
- Mar 15, 2024: Shares held short 172M
- Mar 28, 2024: Shares held short 184M
- Apr 15, 2024: Shares held short 185M
- Apr 30, 2024: Shares held short 191M
- May 15, 2024: Shares held short 192M
- May 31, 2024: Shares held short 185M
- Jun 14, 2024: Shares held short 188M
- Jun 28, 2024: Shares held short 205M
- Jul 15, 2024: Shares held short 222M
- Jul 31, 2024: Shares held short 225M
- Aug 15, 2024: Shares held short 230M
- Aug 30, 2024: Shares held short 250M
- Sep 13, 2024: Shares held short 257M
- Sep 30, 2024: Shares held short 253M
- Oct 15, 2024: Shares held short 244M
- Oct 31, 2024: Shares held short 224M
- Nov 15, 2024: Shares held short 216M
- Nov 29, 2024: Shares held short 195M
- Dec 13, 2024: Shares held short 213M
- Dec 31, 2024: Shares held short 205M
- Jan 15, 2025: Shares held short 238M
- Jan 31, 2025: Shares held short 256M
- Feb 14, 2025: Shares held short 286M
- Feb 28, 2025: Shares held short 282M
- Mar 14, 2025: Shares held short 282M
- Mar 31, 2025: Shares held short 280M
- Apr 15, 2025: Shares held short 264M
- Apr 30, 2025: Shares held short 253M
- May 15, 2025: Shares held short 265M
- May 30, 2025: Shares held short 226M
- Jun 13, 2025: Shares held short 238M
- Jun 30, 2025: Shares held short 293M
- Jul 15, 2025: Shares held short 297M
- Jul 31, 2025: Shares held short 320M
- Aug 15, 2025: Shares held short 342M
- Aug 29, 2025: Shares held short 349M
- Sep 15, 2025: Shares held short 359M
- Sep 30, 2025: Shares held short 384M
- Oct 15, 2025: Shares held short 331M
- Oct 31, 2025: Shares held short 311M
- Nov 14, 2025: Shares held short 305M
- Nov 28, 2025: Shares held short 336M
- Dec 15, 2025: Shares held short 343M
- Dec 31, 2025: Shares held short 348M
- Jan 15, 2026: Shares held short 340M
- Jan 30, 2026: Shares held short 348M
- Feb 13, 2026: Shares held short 347M
- Feb 27, 2026: Shares held short 327M
- Mar 13, 2026: Shares held short 329M
- Mar 31, 2026: Shares held short 340M
- Apr 15, 2026: Shares held short 345M
- Apr 30, 2026: Shares held short 343M
- May 15, 2026: Shares held short 341M
- May 29, 2026: Shares held short 347M
- Jun 15, 2026: Shares held short 340M
- Jun 30, 2026: Shares held short 341M
- Jul 15, 2026: Shares held short 330M
- Jul 31, 2026: Shares held short 294M
- Aug 14, 2026: Shares held short 291M
- Aug 31, 2026: Shares held short 291M
- Sep 15, 2026: Shares held short 287M
- Sep 30, 2026: Shares held short 285M
- Oct 15, 2026: Shares held short 292M
As brokers report them to the regulator twice a month, mid-month and at month end, published about eight business days later. A short position is shares sold borrowed and not yet bought back. The share count is the one the company's market value is figured on, from its filings. Days to cover is the shares held short over the average daily volume of the weeks between two reports.
Short sales in daily trading60.0% of the shares in the last 14 sessions' reported trades were short sales.
In the last 14 sessions, 60.0% of the shares in the reported trades were short sales, against 55.2% in the 14 before.
- Last 14 sessionsOct 27, 2026 – Nov 13, 2026
- 60.0%
- The 14 beforeOct 7, 2026 – Oct 26, 2026
- 55.2%
- Change
- +4.8 pts
- Short sales a dayon average, of 34.02M shares
- 20.43M
- More than atof 3,649 US-listed companies, same days
- 83%
- Median of alleight in ten from 34.6% to 63.4%
- 50.1%
- Oct 7, 2026: Short sales 60.6%
- Oct 8, 2026: Short sales 57.7%
- Oct 9, 2026: Short sales 49.7%
- Oct 12, 2026: Short sales 51%
- Oct 13, 2026: Short sales 55%
- Oct 14, 2026: Short sales 47.1%
- Oct 15, 2026: Short sales 56.5%
- Oct 16, 2026: Short sales 54.4%
- Oct 19, 2026: Short sales 54%
- Oct 20, 2026: Short sales 52%
- Oct 21, 2026: Short sales 60.4%
- Oct 22, 2026: Short sales 59.5%
- Oct 23, 2026: Short sales 58.4%
- Oct 26, 2026: Short sales 64.5%
- Oct 27, 2026: Short sales 53.4%
- Oct 28, 2026: Short sales 62.8%
- Oct 29, 2026: Short sales 58.5%
- Oct 30, 2026: Short sales 55.9%
- Nov 2, 2026: Short sales 64.4%
- Nov 3, 2026: Short sales 58.4%
- Nov 4, 2026: Short sales 61.4%
- Nov 5, 2026: Short sales 61.9%
- Nov 6, 2026: Short sales 58.1%
- Nov 9, 2026: Short sales 60.9%
- Nov 10, 2026: Short sales 66%
- Nov 11, 2026: Short sales 59.4%
- Nov 12, 2026: Short sales 52.7%
- Nov 13, 2026: Short sales 60.8%
This is not the number of shares sold short today: it measures short sales within each day's trading, and only trades made off the exchanges. Much of it is market makers, who sell shares they do not have to fill buyers' orders and cover soon after, so for a heavily traded stock the share is often around half.
The ETFs that hold it
Which of the 269 US equity ETFs we track hold the stock, and at what weight, from the funds' N-PORT filings.
- ICLNiShares Global Clean Energy ETFWeight in the fund2.67%
- IWOiShares Russell 2000 Growth ETFWeight in the fund0.22%
- IWMiShares Russell 2000 ETFWeight in the fund0.12%
- VBKVanguard Small-Cap Growth Index FundWeight in the fund0.11%
- VTWOVanguard Russell 2000 Index FundWeight in the fund0.09%
- SCHASchwab U.S. Small-Cap ETFWeight in the fund0.06%
- VBVanguard Small-Cap Index FundWeight in the fund0.05%
- VXFVanguard Extended Market Index FundWeight in the fund0.04%
- ONEQFidelity Nasdaq Composite Index ETFWeight in the fund0.01%
- DFACDimensional U.S. Core Equity 2 ETFWeight in the fund0.01%
| ETF | Weight in the fund | Holdings as of |
|---|---|---|
| ICLNiShares Global Clean Energy ETF | 2.67% | Jul 31, 2026 |
| IWOiShares Russell 2000 Growth ETF | 0.22% | Jun 30, 2026 |
| IWMiShares Russell 2000 ETF | 0.12% | Jun 30, 2026 |
| VBKVanguard Small-Cap Growth Index Fund | 0.11% | Jun 30, 2026 |
| VTWOVanguard Russell 2000 Index Fund | 0.09% | Aug 31, 2026 |
| SCHASchwab U.S. Small-Cap ETF | 0.06% | Aug 31, 2026 |
| VBVanguard Small-Cap Index Fund | 0.05% | Jun 30, 2026 |
| VXFVanguard Extended Market Index Fund | 0.04% | Jun 30, 2026 |
| ONEQFidelity Nasdaq Composite Index ETF | 0.01% | Aug 31, 2026 |
| DFACDimensional U.S. Core Equity 2 ETF | 0.01% | Jul 31, 2026 |
16 of the 269 ETFs we track, not of every ETF on the market. The ten largest weights. Positions as each fund filed them in its latest N-PORT.
Institutional investors by quarter
Every manager that reports positions to the SEC (Form 13F), quarter by quarter: how many hold the stock, how many shares and dollars between them, and who entered, left, added or trimmed during the quarter.
- Q3 2025: Managers 456
- Q4 2025: Managers 460
- Q1 2026: Managers 473
- Q2 2026: Managers 507
Institutional investors by quarter
The fund managers holding PLUG, quarter by quarter, from Q1 2013 to Q2 2025, 50 more quarters
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Q2 2026: 507 managers held 815M shares, worth $2.2B. During the quarter 87 opened a position, 53 closed one, 177 added and 107 trimmed.
The largest holders, Q2 2026
- BlackRockIn the quarter+21%
- Vanguard Portfolio ManagementIn the quarter+11%
- Vanguard Capital ManagementIn the quarter+0.6%
- State StreetIn the quarter+6.1%
- Geode Capital ManagementIn the quarter+5.3%
- UBS GroupIn the quarter-20%
- Citadel Advisors (Griffin)In the quarter×28.1
- Two Sigma InvestmentsIn the quarter-17%
- D.E. ShawIn the quarter-55%
- Dimensional Fund AdvisorsIn the quarter+7.5%
| Manager | Shares | In the quarter | Value |
|---|---|---|---|
| BlackRock | 184M | +21% | $499M |
| Vanguard Portfolio Management | 66.18M | +11% | $179M |
| Vanguard Capital Management | 62.94M | +0.6% | $171M |
| State Street | 38.76M | +6.1% | $105M |
| Geode Capital Management | 36.56M | +5.3% | $99M |
| UBS Group | 33.13M | -20% | $90M |
| Citadel Advisors (Griffin) | 24.15M | ×28.1 | $65M |
| Two Sigma Investments | 22.61M | -17% | $61M |
| D.E. Shaw | 21.94M | -55% | $59M |
| Dimensional Fund Advisors | 19.50M | +7.5% | $53M |
From the SEC's Form 13F data sets, Q3 2025 to Q2 2026: the long positions of every manager with more than $100 million under management, as filed up to 45 days after each quarter end. Short positions and options are not in them. Shares as reported each quarter, not adjusted for splits. The stock is matched by its CUSIP, through the SEC's fails-to-deliver files.
Pay against performance, the say-on-pay vote, buybacks by quarter and trading plans are read for S&P 500 companies only.
The full analysis
What do Plug Power's filings show?
Who buys and sells is one part of Plug Power's picture. The full Ploutos AI analysis reads everything the company has filed and shows what stands behind it, with a source for every figure.
- A fair value range built from the filings
- Earnings quality, debt and red flags
- Insider and institutional moves
- The case for and the case against
Which well-known managers hold PLUG?
8 of the managers we track held the shares on Sep 30, 2026. The largest position was Citadel Advisors (Griffin)'s, worth $65M.
Is every insider transaction a purchase or a sale?
No. Many are part of their pay: share awards, option exercises and shares the company keeps for the tax. Only code P is a purchase with their own money, and code S a sale on the market.
Related pages
The other pages on US stocks, free to read. On the company pages, the last three fiscal years are open to everyone, five with a free account, and every year with Ploutos Investor.
The figures come from the company's SEC filings and the share price, and describe what it has reported. They are not a score or a fair value.