Maureen O Helmer insider trades: Plug Power (PLUG) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Maureen reports to the SEC
Open-market buys and sales
9 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Jun 8, 2026 | PLUG | ↓ Sell | 50,000 | $3.23 | $162K | Direct | Jun 10, 2026 (2d) |
| Dec 17, 2020 | PLUG | ↓ Sell | 10,000 | $30.00 | $300K | Direct | Dec 21, 2020 (4d) |
| Dec 14, 2020 | PLUG | ↓ Sell | 15,311 | $26.13 | $400K | Direct | Dec 16, 2020 (2d) |
| Oct 5, 2020 | PLUG | ↓ Sell | 35,000 | $15.00 | $525K | Direct | Oct 7, 2020 (2d) |
| Sep 18, 2020 | PLUG | ↓ Sell | 75,000 | $13.28 | $996K | Direct | Sep 22, 2020 (4d) |
| Jun 23, 2020 | PLUG | ↓ Sell | 150,164 | $6.29 | $945K | Direct | Jun 25, 2020 (2d) |
| Apr 16, 2020 | PLUG | ↓ Sell10b5-1 | 115,000 | $4.29 | $493K | Direct | Apr 20, 2020 (4d) |
| Mar 24, 2016 | PLUG | ↓ Sell | 30,000 | $1.96 | $59K | Direct | Mar 28, 2016 (4d) |
| Feb 1, 2006 | PLUG | ↑ Buy | 4,950 | $5.95 | $29K | Direct | Feb 6, 2006 (5d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other PLUG insiders
Open-market trades in the last 12 months
About Maureen O Helmer's insider trades
Maureen O Helmer is a director at Plug Power (PLUG). Since Feb 1, 2006, Maureen has reported 1 open-market purchase worth $29K and 8 sales worth $3.9M on SEC Form 4. In the last 12 months: 1 sale ($162K).
1 sale (13% of the value sold) was made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so it says little about how the insider sees the stock today.
Their filings also include grants and awards (97 filings), option exercises (2 filings), gifts (1 filing), shares returned to the company (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every PLUG insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.