SEC Form 4 · accession 0001628280-26-046285
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
Jun 26, 2026
Accepted (ET)
Jun 30, 2026 · 5:05 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 | Jun 26, 2026 | M | 130,570 | $0.00 | A | 1,701,050 | D | |
| Common StockF2 | Jun 30, 2026 | F | 60,703 | $6.09 | D | 1,640,347 | 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 UnitsF3,F1,F4 | — | Jun 26, 2026 | M | 130,570 | D | — | — | Common Stock | 130,570 | 261,140 | 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.
- F3The reporting person received a grant of RSUs under the Issuer's 2020 Incentive Plan, which will vest in three equal installments on each of the first three anniversaries of the grant date, subject to continued service through each vesting date.
- F4Not applicable.