← United States · Coverage record
US · SEC FORM 4
PLUG POWER INC
PLUG · Nasdaq · CIK 0001093691 · Industrials · Electrical Equipment & Parts
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
20 Form 4 transaction lines observed in the same window
4 sales · 16 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 3 additional owner(s) remain in Form 4 evidence.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-12-15 · Crespo Jose Luis.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 284,616,311
- Previous report
- 287,260,138
- Avg daily volume
- 48,712,548
- Days to cover
- 5.8
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2025-12-15 | Crespo Jose Luis | Purchase (P) | Common Stock | 37,300 | USD 2.34 | USD 87,282 | SEC filing ↗ |
| 2025-06-09 | MIDDLETON PAUL B | Purchase (P) | Common Stock | 650,000 | USD 1.03 | USD 669,500 | SEC filing ↗ |
| 2025-05-16 | MIDDLETON PAUL B | Purchase (P) | Common Stock | 350,000 | USD 0.72 | USD 252,000 | SEC filing ↗ |
Form 4 evidence
41 transaction lines in the latest 365-day window; 604 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-10-01 | Kenausis Gregory | Award / grant (A) | Common Stock | 5,928 | USD 1.94 | USD 11,500 | SEC filing ↗ |
| 2026-10-01 | Joggerst Patrick | Award / grant (A) | Common Stock | 11,598 | USD 1.94 | USD 22,500 | SEC filing ↗ |
| 2026-10-01 | BONNEY MARK J | Award / grant (A) | Common Stock | 12,242 | USD 1.94 | USD 23,749 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-10-01 | Kenausis Gregory | Award / grant (A) | Common Stock | 5,928 | USD 1.94 | USD 11,500 | SEC filing ↗ |
| 2026-10-01 | Joggerst Patrick | Award / grant (A) | Common Stock | 11,598 | USD 1.94 | USD 22,500 | SEC filing ↗ |
| 2026-10-01 | BONNEY MARK J | Award / grant (A) | Common Stock | 12,242 | USD 1.94 | USD 23,749 | SEC filing ↗ |
| 2026-10-01 | Angle Colin M | Award / grant (A) | Common Stock | 6,121 | USD 1.94 | USD 11,875 | SEC filing ↗ |
| 2026-09-18 | Haycraft Benjamin | Sale (S) | Common Stock | 200,000 | USD 2.14 | USD 428,000 | SEC filing ↗ |
| 2026-09-15 | Haycraft Benjamin | Sale (S) | Common Stock | 18,750 | USD 2.06 | USD 38,625 | SEC filing ↗ |
| 2026-09-11 | Haycraft Benjamin | Sale (S) | Common Stock | 13,810 | USD 2.14 | USD 29,553 | SEC filing ↗ |
| 2026-07-01 | Kenausis Gregory | Award / grant (A) | Common Stock | 3,980 | USD 2.71 | USD 10,786 | SEC filing ↗ |
| 2026-07-01 | Joggerst Patrick | Award / grant (A) | Common Stock | 7,644 | USD 2.71 | USD 20,715 | SEC filing ↗ |
| 2026-07-01 | BONNEY MARK J | Award / grant (A) | Common Stock | 8,764 | USD 2.71 | USD 23,750 | SEC filing ↗ |
| 2026-07-01 | Angle Colin M | Award / grant (A) | Common Stock | 3,558 | USD 2.71 | USD 9,642 | SEC filing ↗ |
| 2026-06-25 | MIDDLETON PAUL B | Award / grant (A) | Common Stock | 389,105 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-11 | WILLIS GARY K | Award / grant (A) | Common Stock | 39,753 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-11 | MCNAMEE GEORGE C | Award / grant (A) | Common Stock | 39,753 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-11 | Kenausis Gregory | Award / grant (A) | Common Stock | 39,753 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-11 | Joggerst Patrick | Award / grant (A) | Common Stock | 39,753 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-11 | HELMER MAUREEN O | Award / grant (A) | Common Stock | 39,753 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-11 | BONNEY MARK J | Award / grant (A) | Common Stock | 39,753 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-11 | Angle Colin M | Award / grant (A) | Common Stock | 39,753 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-08 | HELMER MAUREEN O | Sale (S) | Common Stock | 50,000 | USD 3.23 | USD 161,500 | SEC filing ↗ |
| 2026-04-01 | Marsh Andrew | Award / grant (A) | Common Stock | 3,688 | USD 2.26 | USD 8,335 | SEC filing ↗ |
| 2026-04-01 | Mahtani Kavita | Award / grant (A) | Common Stock | 9,956 | USD 2.26 | USD 22,501 | SEC filing ↗ |
| 2026-04-01 | Kenausis Gregory | Award / grant (A) | Common Stock | 8,712 | USD 2.26 | USD 19,689 | SEC filing ↗ |
| 2026-04-01 | Joggerst Patrick | Award / grant (A) | Common Stock | 8,850 | USD 2.26 | USD 20,001 | SEC filing ↗ |
| 2026-04-01 | BONNEY MARK J | Award / grant (A) | Common Stock | 10,509 | USD 2.26 | USD 23,750 | SEC filing ↗ |
| 2026-04-01 | Angle Colin M | Award / grant (A) | Common Stock | 3,872 | USD 2.26 | USD 8,751 | SEC filing ↗ |
| 2026-01-12 | Haycraft Benjamin | Sale (S) | Common Stock | 40,000 | USD 2.17 | USD 86,800 | SEC filing ↗ |
| 2026-01-02 | WILLIS GARY K | Award / grant (A) | Common Stock | 16,497 | USD 1.97 | USD 32,499 | SEC filing ↗ |
| 2026-01-02 | Mahtani Kavita | Award / grant (A) | Common Stock | 11,421 | USD 1.97 | USD 22,499 | SEC filing ↗ |
| 2026-01-02 | MCNAMEE GEORGE C | Award / grant (A) | Common Stock | 13,008 | USD 1.97 | USD 25,626 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | PLUG |
| CIK | 0001093691 |
| Sector | Industrials |
| Industry | Electrical Equipment & Parts Yahoo Finance |
| SEC SIC | 3620 Electrical Industrial Apparatus |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 604 transaction lines from 2020-01-02 to 2026-10-01 3 P purchase lines · 116 S sale lines · 485 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.