EOSE insider trading — Eos Energy Enterprises, Inc.
Over the last 90 days, insiders at Eos Energy Enterprises, Inc. (EOSE) made 2 open-market purchases worth $59K and 1 open-market sale worth $575K, making them net sellers by $516K. The largest purchase was by Song Haiyan (Director), who bought 10,000 shares for $40K on Sep 11, 2026. The largest sale was by Mastrangelo Joe (Chief Executive Officer), who sold 159,154 shares for $575K on Jul 27, 2026.
Updated Oct 16, 2026.
Recent EOSE insider transactions
Every Form 4 filed by Eos Energy Enterprises, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | Puri Sumeet | Chief Accounting Officer | S · Sale · 10b5-1 | Direct | 43,750 | $3.92 | $172K | Form 4 |
| Sep 14, 2026 | Puri Sumeet | Chief Accounting Officer | M · Option exercise · 10b5-1 | Direct | 87,500 | — | — | Form 4 |
| Sep 16, 2026 | Mastrangelo Joe | Chief Executive Officer | S · Sale · 10b5-1 | Direct | 250,000 | $3.92 | $980K | Form 4 |
| Sep 14, 2026 | Mastrangelo Joe | Chief Executive Officer | A · Grant/award · 10b5-1 | Direct | 500,000 | — | — | Form 4 |
| Sep 14, 2026 | Song Haiyan | Director | P · Purchase | Direct | 5,000 | $3.84 | $19K | Form 4 |
| Sep 11, 2026 | Song Haiyan | Director | P · Purchase | Direct | 10,000 | $3.95 | $40K | Form 4 |
| Sep 9, 2026 | Puri Sumeet | Chief Accounting Officer | S · Sale · 10b5-1 | Direct | 34,167 | $4.13 | $141K | Form 4 |
| Sep 5, 2026 | Puri Sumeet | Chief Accounting Officer | M · Option exercise · 10b5-1 | Direct | 68,333 | — | — | Form 4 |
| Jul 21, 2026 | Mastrangelo Joe | Chief Executive Officer | M · Option exercise | Direct | 111,118 | $5.48 | $609K | Form 4 |
| Jul 21, 2026 | Dimitrief Alexander | Director | M · Option exercise | Direct | 17,897 | $5.48 | $98K | Form 4 |
| Jul 21, 2026 | Dimitrief Alexander | Director | M · Option exercise | Indirect | 1,377 | $5.48 | $8K | Form 4 |
| Jul 21, 2026 | Walters Marian | Director | M · Option exercise | Direct | 11,407 | $5.48 | $63K | Form 4 |
| Jul 21, 2026 | Bornstein Jeffrey S | Director | M · Option exercise | Direct | 9,558 | $5.48 | $52K | Form 4 |
| Jul 21, 2026 | Urban David | Director | M · Option exercise | Direct | 12,185 | $5.48 | $67K | Form 4 |
| Jul 21, 2026 | Nigro Joseph | Director | M · Option exercise | Direct | 2,773 | $5.48 | $15K | Form 4 |
| Jul 21, 2026 | Buczkowski Michelle | Chief Administration Officer | M · Option exercise | Direct | 2,585 | $5.48 | $14K | Form 4 |
| Jul 21, 2026 | Demby Claude | Director | M · Option exercise | Direct | 1,825 | $5.48 | $10K | Form 4 |
| Jul 21, 2026 | Kroeker Nathan | Chief Commercial Officer | M · Option exercise | Direct | 16,944 | $5.48 | $93K | Form 4 |
| Jul 28, 2026 | Puri Sumeet | Chief Accounting Officer | S · Sale · 10b5-1 | Direct | 29,167 | $3.36 | $98K | Form 4 |
| Jul 25, 2026 | Puri Sumeet | Chief Accounting Officer | M · Option exercise · 10b5-1 | Direct | 58,334 | — | — | Form 4 |
| Jul 28, 2026 | Kroeker Nathan | Chief Commercial Officer | S · Sale · 10b5-1 | Direct | 110,417 | $3.36 | $371K | Form 4 |
| Jul 27, 2026 | Mastrangelo Joe | Chief Executive Officer | S · Sale | Direct | 159,154 | $3.61 | $575K | Form 4 |
| Jul 25, 2026 | Kroeker Nathan | Chief Commercial Officer | M · Option exercise · 10b5-1 | Direct | 220,834 | — | — | Form 4 |
| Jul 25, 2026 | Mastrangelo Joe | Chief Executive Officer | M · Option exercise | Direct | 333,334 | — | — | Form 4 |
EOSE insider trading FAQ
Are insiders buying EOSE stock?
Yes. In the last 90 days, Eos Energy Enterprises, Inc. insiders made 2 open-market purchases totaling $59K, and 1 open-market sale totaling $575K. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading EOSE?
Recent buyers: Song Haiyan. Recent sellers: Mastrangelo Joe.
Where does EOSE insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.