EOSE
Eos Energy Enterprises, Inc.
Eos Energy Enterprises, Inc. insider trading
Insiders at Eos Energy Enterprises, Inc. have been buying its stock on the open market. The largest purchase in the last 30 days was Song Haiyan (Director) buying $39.5K of EOSE, filed Sep 15, 2026. Every open-market purchase and sale its officers, directors and 10% owners filed in that time is listed below, each linked to the original Form 4.
- Bought on the open market
- $58.7K
- Sold
- —
- Insiders
- 1
- Latest trade
- Sep 11, 2026
From SEC filings · last 30 days
Recent EOSE insider transactions
SEC Form 4 data, Q3 2024 to Q2 2026
EOSE insider trading by quarter
Between Jul 01, 2024 and Jun 30, 2026, 10 insiders traded EOSE on the open market: 8 purchases worth $777.5K and 33 sales worth $23.6M, 15 of the sales pre-scheduled under a 10b5-1 plan. In the last four quarters alone: 4 purchases ($693K) and 27 sales ($19.3M), by 10 insiders.
| Quarter | Bought | Sold | Insiders |
|---|---|---|---|
| Q2 2026 | — | −$904.3K7 sales · 4 on a plan | |
| Q1 2026 | +$693K4 buys | −$1.5M2 sales · all on a plan | |
| Q4 2025 | — | −$12.9M7 sales | |
| Q3 2025 | — | −$4M11 sales · 9 on a plan | |
| Q2 2025 | — | −$3.8M4 sales | |
| Q1 2025 | — | — | |
| Q4 2024 | — | — | |
| Q3 2024 | +$84.6K4 buys | −$427.7K2 sales |
- Largest purchase
- +$345K of EOSE by Mastrangelo Joe (Chief Executive Officer · Director) on Mar 02, 2026.
- Largest sale
- −$7.5M of EOSE by Stidolph Russell Monoki (Director) on Dec 05, 2025.
Open-market transactions through Jun 30, 2026most recent first
Kroeker Nathan10b5-1
CCO and Interim CFO
−$206.8K
Jun 30, 2026
35,289 sh · $5.86
Silberman Michael W10b5-1
Chief Legal Officer
−$88K
Jun 30, 2026
14,998 sh · $5.87
Buczkowski Michelle10b5-1
Chief Administration Officer
−$67.3K
Jun 30, 2026
11,469 sh · $5.87
Puri Sumeet10b5-1
Chief Accounting Officer
−$51.7K
Jun 30, 2026
8,823 sh · $5.86
Walters Marian
Director
−$275.4K
May 28, 2026
30,000 sh · $9.18
Walters Marian
Director
−$160.7K
May 20, 2026
22,319 sh · $7.20
Walters Marian
Director
−$54.3K
May 19, 2026
7,681 sh · $7.07
Urban David
Director
+$100.1K
Mar 09, 2026
16,250 sh · $6.16
Mastrangelo Joe
Chief Executive Officer · Director
+$157.3K
Mar 04, 2026
23,900 sh · $6.58
Mastrangelo Joe
Chief Executive Officer · Director
+$345K
Mar 02, 2026
60,000 sh · $5.75
Dimitrief Alexander
Director
+$90.6K
Mar 02, 2026
15,000 sh · $6.04
Kroeker Nathan10b5-1
CCO and Interim CFO
−$802K
Jan 26, 2026
50,000 sh · $16.04
Silberman Michael W10b5-1
Chief Legal Officer
−$739.2K
Jan 23, 2026
41,667 sh · $17.74
Stidolph Russell Monoki
Director
−$3.5M
Dec 08, 2025
235,367 sh · $14.89
Stidolph Russell Monoki
Director
−$460.8K
Dec 08, 2025
29,999 sh · $15.36
| Date | Insider | Shares | Price | Value |
|---|---|---|---|---|
| Jun 30, 2026 | Kroeker Nathan10b5-1CCO and Interim CFO | 35,289 | $5.86 | −$206.8K |
| Jun 30, 2026 | Silberman Michael W10b5-1Chief Legal Officer | 14,998 | $5.87 | −$88K |
| Jun 30, 2026 | Buczkowski Michelle10b5-1Chief Administration Officer | 11,469 | $5.87 | −$67.3K |
| Jun 30, 2026 | Puri Sumeet10b5-1Chief Accounting Officer | 8,823 | $5.86 | −$51.7K |
| May 28, 2026 | Walters MarianDirector | 30,000 | $9.18 | −$275.4K |
| May 20, 2026 | Walters MarianDirector | 22,319 | $7.20 | −$160.7K |
| May 19, 2026 | Walters MarianDirector | 7,681 | $7.07 | −$54.3K |
| Mar 09, 2026 | Urban DavidDirector | 16,250 | $6.16 | +$100.1K |
| Mar 04, 2026 | Mastrangelo JoeChief Executive Officer · Director | 23,900 | $6.58 | +$157.3K |
| Mar 02, 2026 | Mastrangelo JoeChief Executive Officer · Director | 60,000 | $5.75 | +$345K |
| Mar 02, 2026 | Dimitrief AlexanderDirector | 15,000 | $6.04 | +$90.6K |
| Jan 26, 2026 | Kroeker Nathan10b5-1CCO and Interim CFO | 50,000 | $16.04 | −$802K |
| Jan 23, 2026 | Silberman Michael W10b5-1Chief Legal Officer | 41,667 | $17.74 | −$739.2K |
| Dec 08, 2025 | Stidolph Russell MonokiDirector | 235,367 | $14.89 | −$3.5M |
| Dec 08, 2025 | Stidolph Russell MonokiDirector | 29,999 | $15.36 | −$460.8K |
From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.
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Questions
- Are EOSE insiders buying or selling?
- Between Sep 14, 2026 and Sep 11, 2026, 1 Eos Energy Enterprises, Inc. insider made 2 open-market purchases worth $58.7K and no sales, a net purchase of $58.7K.
- How much EOSE stock have insiders bought and sold in the last two years?
- Between Jul 01, 2024 and Jun 30, 2026, 10 Eos Energy Enterprises, Inc. insiders made 8 open-market purchases worth $777.5K and 33 sales worth $23.6M. 15 of the sales were pre-scheduled under a Rule 10b5-1 plan. In the four quarters to Jun 30, 2026: 4 purchases ($693K) and 27 sales ($19.3M). The largest purchase was Mastrangelo Joe buying $345K on Mar 02, 2026. The largest sale was Stidolph Russell Monoki selling $7.5M on Dec 05, 2025.
- What was the largest recent EOSE insider trade?
- Song Haiyan (Director) bought $39.5K of EOSE stock on Sep 11, 2026 at about $3.95 a share.
- When did an insider last buy EOSE shares?
- The most recent open-market purchase on file is Song Haiyan (Director) buying $19.2K on Sep 14, 2026. The largest purchase in the period was $39.5K by Song Haiyan.
- Where does EOSE insider trading data come from?
- From the Form 4 filings Eos Energy Enterprises, Inc.'s officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.
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