Nasdaq · CIK 0001805077
EOSE Eos Energy Enterprises, Inc.
Insider trading from SEC Form 4. Last filing 27 d ago. Close $2.52 on Oct 9, 2026, 0% from the 52-week low and -87% from the high.
In brief
Eos Energy Enterprises, Inc. (EOSE) has 112 SEC Form 4 filings on file from 15 insiders, the latest filed on Sep 16, 2026. In the last 90 days insiders made 1 open-market buy worth $59k and 6 open-market sells worth $2.3M, net -$2.3M.
37 open-market trades have been scored at EOSE. The newest: Joe Mastrangelo (Chief Executive Officer) sold $980k of stock on Sep 16, 2026, filed Sep 16, 2026, scored 23 (weak), under a 10b5-1 plan. The largest of the 37 shown: Russell Monoki Stidolph (director) sold $11M on Dec 5, 2025, scored 50 (moderate). 2 insiders sold within 14 days of each other around Sep 16, 2026.
25 Form 144 notices of planned sales are on file, the latest filed Sep 22, 2026.
Last 90 days
Net insider value
-$2.3M
more sold than bought
Buys
1
$59k by 1 insider
Sells
6
$2.3M by 3 insiders
Insiders on file
15
with a Form 4 at this company
Price and insider trades, last year
EOSEOct 9, 2026 · close 2.52
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
Open-market buys and sells at Eos Energy Enterprises, Inc., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 23Weak | Joe Mastrangelo Chief Executive Officer sell | $980k 250,000 shares | -10% | - | |
| 4Weak | Sumeet Puri Chief Accounting Officer sell | $172k 43,750 shares | -14% | - | |
| 30Weak | Haiyan Song director buy | $59k 15,000 shares | - | - | |
| 4Weak | Sumeet Puri Chief Accounting Officer sell | $141k 34,167 shares | -13% | - | |
| 44Moderate | Joe Mastrangelo Chief Executive Officer sell | $575k 159,154 shares | -8% | +4% from low-81% from high | |
| 15Weak | Nathan Kroeker Chief Commercial Officer sell | $371k 110,417 shares | -11% | 0% from low-82% from high | |
| 10Weak | Sumeet Puri Chief Accounting Officer sell | $98k 29,167 shares | -13% | 0% from low-82% from high | |
| 17Weak | Nathan Kroeker CCO and Interim CFO sell | $371k 79,309 shares | -9% | +8% from low-75% from high | |
| 8Weak | Michelle Buczkowski Chief Administration Officer sell | $67k 11,469 shares | -16% | +34% from low-69% from high | |
| 14Weak | Nathan Kroeker CCO and Interim CFO sell | $207k 35,289 shares | -5% | +34% from low-69% from high | |
| 4Weak | Michael W Silberman Chief Legal Officer sell | $88k 14,998 shares | -5% | +34% from low-69% from high | |
| 2Weak | Sumeet Puri Chief Accounting Officer sell | $52k 8,823 shares | -5% | +34% from low-69% from high | |
| 19Weak | Marian Walters director sell | $275k 30,000 shares | -16% | +137% from low-53% from high | |
| 16Weak | Marian Walters director sell | $161k 22,319 shares | -12% | +87% from low-63% from high | |
| 7Weak | Marian Walters director sell | $54k 7,681 shares | -5% | +81% from low-64% from high | |
| 54Moderate | David Urban director buy | $100k 16,250 shares | +35% | +87% from low-68% from high | |
| 64Notable | Joe Mastrangelo Chief Executive Officer buy | $157k 23,900 shares | +2% | +105% from low-65% from high | |
| 50Moderate | Alexander Dimitrief director buy | $91k 15,000 shares | +7% | +79% from low-69% from high | |
| 63Notable | Joe Mastrangelo Chief Executive Officer buy | $345k 60,000 shares | +4% | +79% from low-69% from high | |
| 17Weak | Nathan Kroeker CCO and Interim CFO sell | $802k 50,000 shares | -7% | +391% from low-16% from high | |
| 14Weak | Michael W Silberman Chief Legal Officer sell | $739k 41,667 shares | -13% | +418% from low-11% from high | |
| 70Notable | Jeffrey S Bornstein director sell | $613k 40,328 shares | -504% | +425% from low-19% from high | |
| 47Moderate | Marian Walters director sell | $791k 50,000 shares | -27% | +425% from low-19% from high | |
| 50Moderate | Russell Monoki Stidolph director sell | $11M 766,134 shares | -29% | +388% from low-22% from high | |
| 7Weak | Sumeet Puri Chief Accounting Officer sell | $288k 40,501 shares | -20% | +220% from low-10% from high | |
| 49Moderate | Marian Walters director sell | $395k 50,000 shares | -27% | +254% from low0% from high | |
| 48Moderate | Alexander Dimitrief director sell | $270k 45,000 shares | -17% | +189% from low-13% from high | |
| 10Weak | Sumeet Puri Chief Accounting Officer sell | $104k 17,500 shares | -11% | +177% from low-16% from high | |
| 16Weak | Michael W Silberman General Counsel sell | $390k 65,625 shares | -21% | +177% from low-16% from high | |
| 26Weak | Nathan Kroeker CCO and Interim CFO sell | $590k 99,375 shares | -14% | +177% from low-16% from high | |
| 35Weak | Joe Mastrangelo Chief Executive Officer sell | $990k 166,667 shares | -11% | +177% from low-16% from high | |
| 18Weak | Joe Mastrangelo Chief Executive Officer sell | $626k 127,152 shares | -9% | +123% from low-33% from high | |
| 15Weak | Nathan Kroeker CCO and Interim CFO sell | $358k 71,378 shares | -13% | +140% from low-28% from high | |
| 53Moderate | Sumeet Puri Chief Accounting Officer sell | $248k 36,173 shares | -27% | +225% from low-2% from high | |
| 61Notable | Michael W Silberman General Counsel sell | $692k 100,943 shares | -38% | +225% from low-2% from high | |
| 65Notable | Nathan Kroeker Chief Commercial Officer sell | $1.0M 152,856 shares | -27% | +225% from low-2% from high | |
| 70Notable | Joe Mastrangelo Chief Executive Officer sell | $1.9M 270,384 shares | -20% | +225% from low-2% from high |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 22, 2026 | Michael Silberman Former Officer | 114,650 0.03% of outstanding | $467k | Sep 22, 2026 | $762k |
| Sep 16, 2026 | Puri Sumeet Officer | 43,750 0.01% of outstanding | $182k | Sep 16, 2026 | $291k |
| Sep 16, 2026 | Mastrangelo Joe Officer, Director | 250,000 0.07% of outstanding | $1.0M | Sep 16, 2026 | none |
| Sep 16, 2026 | Kroeker Nathan Former Officer | 165,625 0.05% of outstanding | $687k | Sep 16, 2026 | $949k |
| Sep 16, 2026 | Silberman Michael W Former Officer | 109,375 0.03% of outstanding | $454k | Sep 16, 2026 | $333k |
| Sep 9, 2026 | Puri Sumeet Officer | 34,167 0.01% of outstanding | $143k | Sep 9, 2026 | $150k |
| Jul 28, 2026 | Kroeker Nathan Officer | 110,417 0.03% of outstanding | $379k | Jul 28, 2026 | $578k |
| Jul 28, 2026 | Silberman Michael W Former Officer | 72,917 0.02% of outstanding | $250k | Jul 28, 2026 | $88k |
| Jul 28, 2026 | Puri Sumeet Officer | 29,167 0.01% of outstanding | $100k | Jul 28, 2026 | $52k |
| Jul 7, 2026 | Kroeker Nathan Officer | 79,309 0.02% of outstanding | $412k | Jul 7, 2026 | $207k |
| Jun 30, 2026 | Buczkowski Michelle Officer | 11,469 0.00% of outstanding | $69k | Jun 30, 2026 | none |
| Jun 30, 2026 | Kroeker Nathan Officer | 35,289 0.01% of outstanding | $211k | Jun 30, 2026 | none |
| Jun 30, 2026 | Silberman Michael W Officer | 14,998 0.00% of outstanding | $90k | Jun 30, 2026 | none |
| Jun 30, 2026 | Puri Sumeet Officer | 8,823 0.00% of outstanding | $53k | Jun 30, 2026 | none |
| May 28, 2026 | Marian Walters Officer | 30,000 0.01% of outstanding | $275k | May 28, 2026 | $212k |
| May 19, 2026 | Marian Walters Officer | 30,000 0.01% of outstanding | $212k | May 19, 2026 | none |
| Jan 26, 2026 | Kroeker Nathan Officer | 50,000 0.02% of outstanding | $849k | Jan 26, 2026 | none |
| Jan 23, 2026 | Silberman Michael W Officer | 41,667 0.01% of outstanding | $761k | Jan 23, 2026 | none |
| Dec 8, 2025 | Russ Stidolph Officer | 296,439 0.10% of outstanding | $4.4M | Dec 8, 2025 | $9.1M |
| Dec 8, 2025 | Stidolph Russell Monoki Director | 29,999 0.01% of outstanding | $450k | Dec 8, 2025 | $7.5M |
| Dec 5, 2025 | Jeff Bornstein Officer | 32,328 0.01% of outstanding | $486k | Dec 5, 2025 | none |
| Dec 5, 2025 | Bornstein Jeffrey S Director | 8,000 0.00% of outstanding | $120k | Dec 5, 2025 | none |
| Dec 5, 2025 | Alex Dimitrief Officer | 17,704 0.01% of outstanding | $266k | Dec 5, 2025 | none |
| Dec 5, 2025 | Stidolph Russell Monoki Director | 500,000 0.17% of outstanding | $7.5M | Dec 5, 2025 | none |
| Dec 4, 2025 | Marian Walters Officer | 66,933 0.02% of outstanding | $1.1M | Dec 4, 2025 | none |
Transactions
The newest 50 of 253 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | Joe Mastrangelo Chief Executive Officer | AGrant or award Common Stock10b5-1 | +500,000 | $0.00 | $0 | 2,558,704 | 27 d ago |
| Sep 14, 2026 | Sumeet Puri Chief Accounting Officer | MOption exercise Common Stock10b5-1 | +87,500 | $0.00 | $0 | 323,945 | 27 d ago |
| Sep 16, 2026 | Sumeet Puri Chief Accounting Officer | SOpen-market sale Common Stock10b5-1 | -43,750 | $3.92 | $172k | 280,195 | 27 d ago |
| Sep 16, 2026 | Joe Mastrangelo Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -250,000 | $3.92 | $980k | 2,308,704 | 27 d ago |
| Sep 14, 2026 | Sumeet Puri Chief Accounting Officer | MOption exercise Performance-Based Restricted Stock Unitsderivative10b5-1 | -87,500 | $0.00 | $0 | 0 | 27 d ago |
| Sep 14, 2026 | Joe Mastrangelo Chief Executive Officer | MOption exercise Performance-Based Restricted Stock Unitsderivative10b5-1 | -500,000 | $0.00 | $0 | 0 | 27 d ago |
| Sep 11, 2026 | Haiyan Song director | POpen-market purchase Common Stock | +10,000 | $3.95 | $40k | 10,000 | 28 d ago |
| Sep 14, 2026 | Haiyan Song director | POpen-market purchase Common Stock | +5,000 | $3.84 | $19k | 15,000 | 28 d ago |
| Sep 5, 2026 | Sumeet Puri Chief Accounting Officer | MOption exercise Common Stock10b5-1 | +68,333 | $0.00 | $0 | 270,612 | 34 d ago |
| Sep 9, 2026 | Sumeet Puri Chief Accounting Officer | SOpen-market sale Common Stock10b5-1 | -34,167 | $4.13 | $141k | 236,445 | 34 d ago |
| Sep 5, 2026 | Sumeet Puri Chief Accounting Officer | MOption exercise Restricted Stock Unitsderivative10b5-1 | -68,333 | $0.00 | $0 | 0 | 34 d ago |
| Aug 24, 2026 | Alessandro Lagi Chief Financial Officer | AGrant or award Restricted Stock Unitsderivative | +195,130 | $0.00 | $0 | 195,130 | Aug 26, 2026 |
| Aug 24, 2026 | Michelle Buczkowski Chief Commercial Officer | AGrant or award Restricted Stock Unitsderivative | +195,130 | $0.00 | $0 | 195,130 | Aug 26, 2026 |
| Aug 24, 2026 | Joe Mastrangelo Chief Executive Officer | AGrant or award Restricted Stock Unitsderivative | +611,406 | $0.00 | $0 | 611,406 | Aug 26, 2026 |
| Aug 24, 2026 | Sumeet Puri Chief Accounting Officer | AGrant or award Restricted Stock Unitsderivative | +65,044 | $0.00 | $0 | 65,044 | Aug 26, 2026 |
| Aug 4, 2026 | Cerberus GP Manager LLC director, owner | AGrant or award Warrant (right to buy)derivativeindirect: See Footnotes | +20,017,772 | - | - | 20,017,772 | Aug 6, 2026 |
| Jul 21, 2026 | Alexander Dimitrief director | MOption exercise Common Stock | +17,897 | $5.48 | $98k | 269,296 | Aug 6, 2026 |
| Jul 21, 2026 | Joe Mastrangelo Chief Executive Officer | MOption exercise Common Stock | +111,118 | $5.48 | $609k | 2,058,704 | Aug 6, 2026 |
| Jul 21, 2026 | Michelle Buczkowski Chief Administration Officer | MOption exercise Common Stock | +2,585 | $5.48 | $14k | 61,827 | Aug 6, 2026 |
| Jul 21, 2026 | Nathan Kroeker Chief Commercial Officer | MOption exercise Common Stock | +16,944 | $5.48 | $93k | 904,471 | Aug 6, 2026 |
| Jul 21, 2026 | Joseph Nigro director | MOption exercise Common Stock | +2,773 | $5.48 | $15k | 41,723 | Aug 6, 2026 |
| Jul 21, 2026 | Claude Demby director | MOption exercise Common Stock | +1,825 | $5.48 | $10k | 157,400 | Aug 6, 2026 |
| Jul 21, 2026 | Marian Walters director | MOption exercise Common Stock | +11,407 | $5.48 | $63k | 171,634 | Aug 6, 2026 |
| Jul 21, 2026 | Jeffrey S Bornstein director | MOption exercise Common Stock | +9,558 | $5.48 | $52k | 143,806 | Aug 6, 2026 |
| Jul 21, 2026 | David Urban director | MOption exercise Common Stock | +12,185 | $5.48 | $67k | 97,767 | Aug 6, 2026 |
| Jul 21, 2026 | Michelle Buczkowski Chief Administration Officer | MOption exercise Subscription Rights (right to buy)derivative | -2,585 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Alexander Dimitrief director | MOption exercise Common Stockindirect: By Spouse | +1,377 | $5.48 | $7,546 | 11,377 | Aug 6, 2026 |
| Jul 21, 2026 | David Urban director | MOption exercise Subscription Rights (right to buy)derivative | -12,185 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Joe Mastrangelo Chief Executive Officer | MOption exercise Subscription Rights (right to buy)derivative | -111,118 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Claude Demby director | MOption exercise Subscription Rights (right to buy)derivative | -1,825 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Nathan Kroeker Chief Commercial Officer | MOption exercise Subscription Rights (right to buy)derivative | -16,944 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Joseph Nigro director | MOption exercise Subscription Rights (right to buy)derivative | -2,773 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Marian Walters director | MOption exercise Subscription Rights (right to buy)derivative | -11,407 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Michelle Buczkowski Chief Administration Officer | MOption exercise Warrant (right to buy)derivative | +1,134 | $0.00 | $0 | 1,134 | Aug 6, 2026 |
| Jul 21, 2026 | Alexander Dimitrief director | MOption exercise Subscription Rights (right to buy)derivative | -17,897 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Claude Demby director | MOption exercise Warrant (right to buy)derivative | +801 | $0.00 | $0 | 801 | Aug 6, 2026 |
| Jul 21, 2026 | Nathan Kroeker Chief Commercial Officer | MOption exercise Warrant (right to buy)derivative | +7,435 | $0.00 | $0 | 7,435 | Aug 6, 2026 |
| Jul 21, 2026 | David Urban director | MOption exercise Warrant (right to buy)derivative | +5,347 | $0.00 | $0 | 5,347 | Aug 6, 2026 |
| Jul 21, 2026 | Joseph Nigro director | MOption exercise Warrant (right to buy)derivative | +1,217 | $0.00 | $0 | 1,217 | Aug 6, 2026 |
| Jul 21, 2026 | Joe Mastrangelo Chief Executive Officer | MOption exercise Warrant (right to buy)derivative | +48,758 | $0.00 | $0 | 48,758 | Aug 6, 2026 |
| Jul 21, 2026 | Jeffrey S Bornstein director | MOption exercise Subscription Rights (right to buy)derivative | -9,558 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Alexander Dimitrief director | MOption exercise Subscription Rights (right to buy)derivativeindirect: By Spouse | -1,377 | $0.00 | $0 | 0 | Aug 6, 2026 |
| Jul 21, 2026 | Marian Walters director | MOption exercise Warrant (right to buy)derivative | +5,005 | $0.00 | $0 | 5,005 | Aug 6, 2026 |
| Jul 21, 2026 | Jeffrey S Bornstein director | MOption exercise Warrant (right to buy)derivative | +4,194 | $0.00 | $0 | 4,194 | Aug 6, 2026 |
| Jul 21, 2026 | Alexander Dimitrief director | MOption exercise Warrant (right to buy)derivative | +7,853 | $0.00 | $0 | 7,853 | Aug 6, 2026 |
| Jul 21, 2026 | Alexander Dimitrief director | MOption exercise Warrant (right to buy)derivativeindirect: By Spouse | +603 | $0.00 | $0 | 603 | Aug 6, 2026 |
| Jul 25, 2026 | Joe Mastrangelo Chief Executive Officer | MOption exercise Common Stock | +333,334 | $0.00 | $0 | 2,106,740 | Jul 28, 2026 |
| Jul 25, 2026 | Nathan Kroeker Chief Commercial Officer | MOption exercise Common Stock10b5-1 | +220,834 | $0.00 | $0 | 997,944 | Jul 28, 2026 |
| Jul 25, 2026 | Sumeet Puri Chief Accounting Officer | MOption exercise Common Stock10b5-1 | +58,334 | $0.00 | $0 | 231,446 | Jul 28, 2026 |
| Jul 28, 2026 | Nathan Kroeker Chief Commercial Officer | SOpen-market sale Common Stock10b5-1 | -110,417 | $3.36 | $371k | 887,527 | Jul 28, 2026 |
50 of 253 rows shown.
Insiders
Everyone who has filed a Form 4 here.
- Jeffrey S Bornsteindirector
- Michelle BuczkowskiChief Commercial Officer
- Cerberus GP Manager LLCdirector, owner
- Alexander Dimitriefofficer, director
- Claude Dembydirector
- Nathan KroekerChief Commercial Officer
- Alessandro LagiChief Financial Officer
- Joe MastrangeloChief Executive Officer
- Joseph Nigrodirector
- Sumeet PuriChief Accounting Officer
- Michael W SilbermanChief Legal Officer
- Haiyan Songdirector
- Russell Monoki Stidolphceo, officer, director, owner
- David Urbandirector
- Marian Waltersdirector
Questions about EOSE
Answered from the filings on this page, as of the latest one.
Are insiders buying EOSE?
As of Sep 16, 2026, SEC Form 4 filings show 1 open-market buy worth $59k by 1 insider and 6 open-market sells worth $2.3M by 3 insiders at Eos Energy Enterprises, Inc. in the last 90 days, net -$2.3M. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade EOSE on the open market?
Joe Mastrangelo (Chief Executive Officer) sold $980k of EOSE on Sep 16, 2026 and filed the Form 4 on Sep 16, 2026. InsiderTell scored 23 (weak), under a 10b5-1 plan, with 2 insiders on the same side within 14 days.
How many insiders file Form 4 at Eos Energy Enterprises, Inc.?
15 people have filed a Form 4 at Eos Energy Enterprises, Inc., among them Jeffrey S Bornstein (director), Michelle Buczkowski (Chief Commercial Officer), Cerberus GP Manager LLC (director and 10% owner). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
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.