SEC Form 4 · accession 0001628280-26-050226
Eos Energy Enterprises, Inc. · EOSE
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Joe Mastrangelo
Officer — Chief Executive Officer · Director
Period of report
Jul 25, 2026
Accepted (ET)
Jul 28, 2026 · 5:02 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001805077
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Jul 25, 2026 | M | 333,334 | $0.00 | A | 2,106,740 | D | |
| Common StockF2 | Jul 27, 2026 | S | 159,154 | $3.61 | D | 1,947,586 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF1,F3 | — | Jul 25, 2026 | M | 333,334 | D | — | — | Common Stock | 333,334 | 333,333 | D |
Explanation of responses
- F1Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.
- F2Represents shares withheld from vested restricted stock unit ("RSU") award to satisfy tax obligations, as permitted by the Company's Amended and Restated 2020 Incentive Plan.
- F3Not applicable.