Updated Jul 16, 2026 · Last SEC filing 2026-07-15
Eos Energy Enterprises, Inc. (EOSE) has filed 30 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-15. 8 Form 8-K material event filings were reported by EOSE in the last 90 days. 7 Form 144 notices of proposed sale were filed for EOSE stock. InsiderAlpha tracks every EOSE SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0001805077 |
|---|
| Form 4 filings (90d) | 30 |
|---|---|
| Form 8-K filings (90d) | 8 |
| Form 144 notices (90d) | 7 |
| Latest Form 4 filing | 2026-07-15 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Kroeker Nathan | CCO and Interim CFO | S — Open-market sale | 79.3K | $4.68 | $371K | SEC | |
| Mastrangelo Joe | Chief Executive Officer | F — Tax withholding / forfeiture | 121.2K | $5.06 | $613K | SEC | |
| Mastrangelo Joe | Chief Executive Officer | M — Option exercise | 254.3K | $0.00 | — | SEC | |
| Kroeker Nathan | CCO and Interim CFO | M — Option exercise | 105.0K | $0.00 | — | SEC | |
| Kroeker Nathan | CCO and Interim CFO | M — Option exercise | 53.6K | $0.00 | — | SEC | |
| Silberman Michael W | Chief Legal Officer | S — Open-market sale | 15.0K | $5.87 | $88K | SEC | |
| Kroeker Nathan | CCO and Interim CFO | S — Open-market sale | 35.3K | $5.86 | $207K | SEC | |
| Puri Sumeet | Chief Accounting Officer | S — Open-market sale | 8.8K | $5.86 | $52K | SEC | |
| Mastrangelo Joe | Chief Executive Officer | F — Tax withholding / forfeiture | 60.7K | $6.09 | $370K | SEC | |
| Buczkowski Michelle | Chief Administration Officer | S — Open-market sale | 11.5K | $5.87 | $67K | SEC | |
| Silberman Michael W | Chief Legal Officer | M — Option exercise | 30.0K | $0.00 | — | SEC | |
| Puri Sumeet | Chief Accounting Officer | M — Option exercise | 17.6K | $0.00 | — | SEC | |
| Buczkowski Michelle | Chief Administration Officer | M — Option exercise | 22.9K | $0.00 | — | SEC | |
| Kroeker Nathan | CCO and Interim CFO | M — Option exercise | 70.6K | $0.00 | — | SEC | |
| Mastrangelo Joe | Chief Executive Officer | M — Option exercise | 130.6K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Eos Energy Enterprises, Inc. (EOSE). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Walters Marian | 14 | $561K |
| Mastrangelo Joe | 9 | $1.96M |
| Kroeker Nathan | 8 | $578K |
| DIMITRIEF ALEXANDER | 4 | $74K |
| Demby Claude | 4 | $64K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in EOSE insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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