As of the latest Form 4 filed Jun 29, 2026.
What Plug Power Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 15 most recent filings for PLUG.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-29 | 2026-06-25 | MIDDLETON PAUL B CFO & Executive VP | AAward | +389K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-16 | 2026-06-11 | WILLIS GARY K Director | AAward | +39.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-16 | 2026-06-11 | MCNAMEE GEORGE C Director | AAward | +39.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-16 | 2026-06-11 | Kenausis Gregory Director | AAward | +39.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-16 | 2026-06-11 | Joggerst Patrick Director | AAward | +39.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-16 | 2026-06-11 | HELMER MAUREEN O Director | AAward | +39.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-16 | 2026-06-11 | BONNEY MARK J Director | AAward | +39.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-16 | 2026-06-11 | Angle Colin M Director | AAward | +39.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | HELMER MAUREEN O Director | SSale | −50.0K | $3.23 | $162K | Yes (planned) | Form 4 ↗ |
| 2026-04-10 | 2026-04-01 | Kenausis Gregory Director | AAward | +8.71K | $2.26 | $19.7K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-01 | Mahtani Kavita Director | AAward | +9.96K | $2.26 | $22.5K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-01 | Angle Colin M Director | AAward | +3.87K | $2.26 | $8.75K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-01 | BONNEY MARK J Director | AAward | +10.5K | $2.26 | $23.8K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-01 | Joggerst Patrick Director | AAward | +8.85K | $2.26 | $20.0K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-01 | Marsh Andrew Director | AAward | +3.69K | $2.26 | $8.33K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also PLUG’s full analysis or the market-wide insider trading feed. The tabs above jump to PLUG’s other SEC data.
Source: SEC Form 4 filings for PLUG, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.