Insider · CIK 0001833309
Joe Mastrangelo
Files at EOSE (Eos Energy Enterprises, Inc.). First filing May 16, 2025, latest Sep 16, 2026.
In brief
Joe Mastrangelo files SEC Form 4 as CEO and director at EOSE (Eos Energy Enterprises, Inc.). Since May 16, 2025, Joe Mastrangelo has reported 2 open-market buys worth $502k and 5 open-market sells worth $5.0M, the latest filed on Sep 16, 2026.
A track record needs three past buys with six months of prices behind them; Joe Mastrangelo has 2, so none is measured yet.
The newest scored trade: sold $980k of EOSE on Sep 16, 2026, filed Sep 16, 2026, scored 23 (weak), under a 10b5-1 plan. In the last 12 months: 2 buys worth $502k and 2 sells worth $1.6M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
EOSE: Eos Energy Enterprises, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 23Weak | Eos Energy Enterprises, Inc. | $980k 250,000 shares | -10% | - | |
| 44Moderate | Eos Energy Enterprises, Inc. | $575k 159,154 shares | -8% | +4% from low-81% from high | |
| 64Notable | Eos Energy Enterprises, Inc. | $157k 23,900 shares | +2% | +105% from low-65% from high | |
| 63Notable | Eos Energy Enterprises, Inc. | $345k 60,000 shares | +4% | +79% from low-69% from high | |
| 35Weak | Eos Energy Enterprises, Inc. | $990k 166,667 shares | -11% | +177% from low-16% from high | |
| 18Weak | Eos Energy Enterprises, Inc. | $626k 127,152 shares | -9% | +123% from low-33% from high | |
| 70Notable | Eos Energy Enterprises, Inc. | $1.9M 270,384 shares | -20% | +225% from low-2% from high |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 16, 2026 | EOSE Eos Energy Enterprises, Inc. | 250,000 0.07% of outstanding | $1.0M | Sep 16, 2026 | none |
| Jul 29, 2025 | EOSE Eos Energy Enterprises, Inc. | 166,667 0.07% of outstanding | $1.0M | Jul 29, 2025 | $2.5M |
| Jul 8, 2025 | EOSE Eos Energy Enterprises, Inc. | 127,152 0.06% of outstanding | $655k | Jul 8, 2025 | $1.9M |
| May 16, 2025 | EOSE Eos Energy Enterprises, Inc. | 270,384 0.12% of outstanding | $1.9M | May 16, 2025 | none |
Transactions
Every row this insider has filed, 32 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | EOSE Eos Energy Enterprises, Inc. | AGrant or award Common Stock10b5-1 | +500,000 | $0.00 | $0 | 2,558,704 | 27 d ago |
| Sep 16, 2026 | EOSE Eos Energy Enterprises, Inc. | SOpen-market sale Common Stock10b5-1 | -250,000 | $3.92 | $980k | 2,308,704 | 27 d ago |
| Sep 14, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Performance-Based Restricted Stock Unitsderivative10b5-1 | -500,000 | $0.00 | $0 | 0 | 27 d ago |
| Aug 24, 2026 | EOSE Eos Energy Enterprises, Inc. | AGrant or award Restricted Stock Unitsderivative | +611,406 | $0.00 | $0 | 611,406 | Aug 26, 2026 |
| Jul 21, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Common Stock | +111,118 | $5.48 | $609k | 2,058,704 | Aug 6, 2026 |
| Jul 21, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Subscription Rights (right to buy)derivative | -111,118 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Warrant (right to buy)derivative | +48,758 | $0.00 | $0 | 48,758 | Aug 6, 2026 |
| Jul 25, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Common Stock | +333,334 | $0.00 | $0 | 2,106,740 | Jul 28, 2026 |
| Jul 27, 2026 | EOSE Eos Energy Enterprises, Inc. | SOpen-market sale Common Stock | -159,154 | $3.61 | $575k | 1,947,586 | Jul 28, 2026 |
| Jul 25, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Restricted Stock Unitsderivative | -333,334 | $0.00 | $0 | 333,333 | Jul 28, 2026 |
| Jul 5, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Common Stock | +254,304 | $0.00 | $0 | 1,894,651 | Jul 7, 2026 |
| Jul 6, 2026 | EOSE Eos Energy Enterprises, Inc. | FTax withholding Common Stock | -121,245 | $5.06 | $613k | 1,773,406 | Jul 7, 2026 |
| Jul 5, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Restricted Stock Unitsderivative | -254,304 | $0.00 | $0 | 0 | Jul 7, 2026 |
| Jun 26, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Common Stock | +130,570 | $0.00 | $0 | 1,701,050 | Jun 30, 2026 |
| Jun 30, 2026 | EOSE Eos Energy Enterprises, Inc. | FTax withholding Common Stock | -60,703 | $6.09 | $370k | 1,640,347 | Jun 30, 2026 |
| Jun 26, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Restricted Stock Unitsderivative | -130,570 | $0.00 | $0 | 261,140 | Jun 30, 2026 |
| Jun 12, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Common Stock | +200,000 | $1.34 | $268k | 1,687,126 | Jun 15, 2026 |
| Jun 12, 2026 | EOSE Eos Energy Enterprises, Inc. | FTax withholding Common Stock | -116,646 | $6.06 | $707k | 1,570,480 | Jun 15, 2026 |
| Jun 12, 2026 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Stock Option (Right to Buy)derivative | -200,000 | $0.00 | $0 | 0 | Jun 15, 2026 |
| Mar 4, 2026 | EOSE Eos Energy Enterprises, Inc. | POpen-market purchase Common Stock | +23,900 | $6.58 | $157k | 1,487,126 | Mar 5, 2026 |
| Mar 2, 2026 | EOSE Eos Energy Enterprises, Inc. | POpen-market purchase Common Stock | +60,000 | $5.75 | $345k | 1,463,226 | Mar 3, 2026 |
| Jul 25, 2025 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Common Stock10b5-1 | +333,333 | $0.00 | $0 | 1,569,893 | Jul 29, 2025 |
| Jul 29, 2025 | EOSE Eos Energy Enterprises, Inc. | SOpen-market sale Common Stock10b5-1 | -166,667 | $5.94 | $990k | 1,403,226 | Jul 29, 2025 |
| Jul 25, 2025 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Restricted Stock Unitsderivative10b5-1 | -333,333 | $0.00 | $0 | 666,667 | Jul 29, 2025 |
| Jul 5, 2025 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Common Stock10b5-1 | +254,303 | $0.00 | $0 | 1,363,712 | Jul 8, 2025 |
| Jul 8, 2025 | EOSE Eos Energy Enterprises, Inc. | SOpen-market sale Common Stock10b5-1 | -127,152 | $4.92 | $626k | 1,236,560 | Jul 8, 2025 |
| Jul 5, 2025 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Restricted Stock Unitsderivative10b5-1 | -254,303 | $0.00 | $0 | 254,304 | Jul 8, 2025 |
| Jun 26, 2025 | EOSE Eos Energy Enterprises, Inc. | AGrant or award Restricted Stock Unitsderivative | +391,710 | $0.00 | $0 | 391,710 | Jun 27, 2025 |
| May 16, 2025 | EOSE Eos Energy Enterprises, Inc. | SOpen-market sale Common Stock | -270,384 | $6.86 | $1.9M | 1,109,409 | May 16, 2025 |
| May 8, 2025 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Common Stock | +470,000 | $0.00 | $0 | 1,379,793 | May 12, 2025 |
| May 8, 2025 | EOSE Eos Energy Enterprises, Inc. | AGrant or award Performance-Based Restricted Stock Unitsderivative | +470,000 | $0.00 | $0 | 470,000 | May 12, 2025 |
| May 8, 2025 | EOSE Eos Energy Enterprises, Inc. | MOption exercise Performance-Based Restricted Stock Unitsderivative | -470,000 | $0.00 | $0 | 0 | May 12, 2025 |
Questions about Joe Mastrangelo
Answered from the filings on this page, as of the latest one.
Is Joe Mastrangelo buying or selling?
In the last 12 months Joe Mastrangelo reported 2 open-market buys worth $502k and 2 open-market sells worth $1.6M on SEC Form 4; the latest was sold $980k of EOSE on Sep 16, 2026. Grants, option exercises and tax withholding are not counted.
How did Joe Mastrangelo's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Joe Mastrangelo has 2.
Where does Joe Mastrangelo file Form 4?
Joe Mastrangelo has filed Form 4 at EOSE (Eos Energy Enterprises, Inc.) as Chief Executive Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.