EOSE Eos Energy Enterprises, Inc.
Eos Energy Enterprises, Inc. (EOSE) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 71% planned / 29% discretionary
Largest single sale: $980.0K.
Where they traded
Last open-market purchase: September 14, 2026 , by Song Haiyan .
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| Mastrangelo Joe | Chief Executive Officer | Sell 10b5-1 | 250,000 | $3.92 | $980.0K | 2,308,704 −9.8% of holding | |
| Puri Sumeet | Chief Accounting Officer | Sell 10b5-1 | 43,750 | $3.92 | $171.5K | 280,195 −13.5% of holding | |
| Song Haiyan | Director | Buy | 5,000 | $3.84 | $19.2K | 15,000 | |
| Song Haiyan | Director | Buy | 10,000 | $3.95 | $39.5K | 10,000 | |
| Puri Sumeet | Chief Accounting Officer | Sell 10b5-1 | 34,167 | $4.13 | $141.1K | 236,445 −12.6% of holding | |
| Kroeker Nathan | Chief Commercial Officer | Sell 10b5-1 | 110,417 | $3.36 | $371.0K | 887,527 −11.1% of holding | |
| Puri Sumeet | Chief Accounting Officer | Sell 10b5-1 | 29,167 | $3.36 | $98.0K | 202,279 −12.6% of holding | |
| Mastrangelo Joe | Chief Executive Officer | Sell | 159,154 | $3.61 | $574.5K | 1,947,586 −7.6% of holding | |
| Kroeker Nathan | CCO and Interim CFO | Sell 10b5-1 | 79,309 | $4.68 | $371.2K | 777,110 −9.3% of holding | |
| Kroeker Nathan | CCO and Interim CFO | Sell 10b5-1 | 35,289 | $5.86 | $206.8K | 697,801 −4.8% of holding | |
| Silberman Michael W | Chief Legal Officer | Sell 10b5-1 | 14,998 | $5.87 | $88.0K | 298,277 −4.8% of holding | |
| Buczkowski Michelle | Chief Administration Officer | Sell 10b5-1 | 11,469 | $5.87 | $67.3K | 59,242 −16.2% of holding | |
| Puri Sumeet | Chief Accounting Officer | Sell 10b5-1 | 8,823 | $5.86 | $51.7K | 173,112 −4.8% of holding | |
| Walters Marian | Director | Sell | 30,000 | $9.18 | $275.4K | 158,445 −15.9% of holding | |
| Walters Marian | Director | Sell | 22,319 | $7.20 | $160.7K | 158,445 −12.3% of holding | |
| Walters Marian | Director | Sell | 7,681 | $7.07 | $54.3K | 135,334 −5.4% of holding |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.