EOSE · Insider Trading
Eos Energy Enterprises, Inc. Class A Common Stock
Every open-market purchase and sale reported by EOSE officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-29 | Michelle Buczkowski | Chief Commercial Officer | MIXED | +50,000 | −$100.00K |
| 2026-09-16 | Joe Mastrangelo | Chief Executive Officer | MIXED | +250,000 | −$980.00K |
| 2026-09-16 | Sumeet Puri | Chief Accounting Officer | MIXED | +43,750 | −$171.50K |
| 2026-09-15 | Haiyan Song | Director | Buy | +15,000 | +$58.70K |
| 2026-09-09 | Sumeet Puri | Chief Accounting Officer | MIXED | +34,166 | −$141.11K |
| 2026-08-26 | Alessandro Lagi | Chief Financial Officer | A | +195,130 deriv. | — |
| 2026-08-26 | Sumeet Puri | Chief Accounting Officer | A | +65,044 deriv. | — |
| 2026-08-26 | Joe Mastrangelo | Chief Executive Officer | A | +611,406 deriv. | — |
| 2026-08-26 | Michelle Buczkowski | Chief Commercial Officer | A | +195,130 deriv. | — |
| 2026-08-06 | David Urban | Director | M | +12,185 | +$66.77K |
| 2026-08-06 | Nathan Kroeker | Chief Commercial Officer | M | +16,944 | +$92.85K |
| 2026-08-06 | CCM Frontier Power USA Holdings GP, LLC | Director | A | +20,017,772 deriv. | — |
| 2026-08-06 | Alexander Dimitrief | Director | M | +19,274 | +$105.62K |
| 2026-08-06 | Joseph Nigro | Director | M | +2,773 | +$15.20K |
| 2026-08-06 | Joe Mastrangelo | Chief Executive Officer | M | +111,118 | +$608.93K |
| 2026-08-06 | Claude Demby | Director | M | +1,825 | +$10.00K |
| 2026-08-06 | Michelle Buczkowski | Chief Administration Officer | M | +2,585 | +$14.17K |
| 2026-08-06 | Marian Walters | Director | M | +11,407 | +$62.51K |
| 2026-08-06 | Jeffrey S Bornstein | Director | M | +9,558 | +$52.38K |
| 2026-07-28 | Nathan Kroeker | Chief Commercial Officer | MIXED | +110,417 | −$371.00K |
| 2026-07-28 | Sumeet Puri | Chief Accounting Officer | MIXED | +29,167 | −$98.00K |
| 2026-07-28 | Joe Mastrangelo | Chief Executive Officer | MIXED | +174,180 | −$574.55K |
| 2026-07-27 | Alexander Dimitrief | Director | A | +5,942 deriv. | — |
| 2026-07-27 | Marian Walters | Director | A | +5,942 deriv. | — |
| 2026-07-27 | Joseph Nigro | Director | A | +5,942 deriv. | — |
| 2026-07-15 | Marie Batz Martin | Chief Legal Officer | A | +216,731 deriv. | — |
| 2026-07-15 | Haiyan Song | Director | A | +29,980 deriv. | — |
| 2026-07-07 | Nathan Kroeker | CCO and Interim CFO | MIXED | +79,309 | −$371.17K |
| 2026-07-07 | Joe Mastrangelo | Chief Executive Officer | MIXED | +133,059 | −$613.50K |
| 2026-06-15 | Joe Mastrangelo | Chief Executive Officer | MIXED | +83,354 | −$438.87K |
| 2026-06-09 | David Urban | Director | A | +18,217 deriv. | — |
| 2026-06-09 | Joseph Nigro | Director | A | +24,289 deriv. | — |
| 2026-06-09 | Gregory S. Nixon | Director | A | +18,217 deriv. | — |
| 2026-06-09 | Jeff McNeil | Director | A | +18,217 deriv. | — |
| 2026-06-09 | Marian Walters | Director | A | +21,253 deriv. | — |
| 2026-06-09 | Jeffrey S Bornstein | Director | A | +24,289 deriv. | — |
| 2026-06-09 | Alessandro Lagi | Chief Financial Officer | A | +277,773 deriv. | — |
| 2026-06-09 | Alexander Dimitrief | Director | A | +21,253 deriv. | — |
| 2026-06-09 | Claude Demby | Director | A | +18,217 deriv. | — |
| 2026-06-03 | Marian Walters | Director | M | +1,782 | — |
| 2026-06-03 | Joseph Nigro | Director | M | +3,565 | — |
| 2026-05-29 | Marian Walters | Director | MIXED | — | −$240.00K |
| 2026-05-22 | Marian Walters | Director | MIXED | — | −$134.36K |
| 2026-05-19 | Claude Demby | Director | MIXED | +13,867 | −$63.60K |
| 2026-05-19 | Gregory S. Nixon | Director | MIXED | +13,867 | −$63.60K |
| 2026-05-19 | Jeffrey S Bornstein | Director | MIXED | +18,489 | −$84.80K |
| 2026-05-19 | Jeff McNeil | Director | M | +23,111 | — |
| 2026-05-19 | David Urban | Director | M | +23,111 | — |
| 2026-05-19 | Alexander Dimitrief | Director | MIXED | +16,178 | −$74.20K |
| 2026-05-19 | Marian Walters | Director | MIXED | +23,111 | −$45.24K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Russell Monoki Stidolph | Director | 2,518,395 | $4.43M |
| Joe Mastrangelo | Chief Executive Officer | 2,308,704 | $4.06M |
| Nathan Kroeker | Chief Commercial Officer | 904,471 | $1.59M |
| Jeff McNeil | Director | 349,562 | $615.23K |
| Michael W Silberman | Chief Legal Officer | 283,279 | $498.57K |
| Alexander Dimitrief | Director | 280,673 | $493.98K |
| Sumeet Puri | Chief Accounting Officer | 280,195 | $493.14K |
| Marian Walters | Director | 176,634 | $310.88K |
| Michelle Buczkowski | Chief Commercial Officer | 161,827 | $284.82K |
| Claude Demby | Director | 157,400 | $277.02K |
| Jeffrey S Bornstein | Director | 145,306 | $255.74K |
| David Urban | Director | 97,767 | $172.07K |
| Joseph Nigro | Director | 41,723 | $73.43K |
| Gregory S. Nixon | Director | 23,111 | $40.68K |
| Haiyan Song | Director | 15,000 | $26.40K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the EOSE quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.