SEC Form 4 · accession 0001628280-26-043041
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 12, 2026
Accepted (ET)
Jun 15, 2026 · 9:15 am 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 Stock | Jun 12, 2026 | M | 200,000 | $1.34 | A | 1,687,126 | D | |
| Common StockF1 | Jun 12, 2026 | F | 116,646 | $6.06 | D | 1,570,480 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy)F2 | $1.34 | Jun 12, 2026 | M | 200,000 | D | — | Jun 16, 2032 | Common Stock | 200,000 | 0 | D |
Explanation of responses
- F1The transactions reported in this Form 4 reflect the exercise of Non-Qualified Stock Options by the Reporting Person and the subsequent retention of the underlying shares of Common Stock. The option exercise and corresponding acquisition of shares reported in Table I and Table II were exempted from Section 16(b) liability pursuant to Rule 16b-3 promulgated under the Securities Exchange Act of 1934. The Reporting Person has elected to retain the net shares acquired upon exercise to maintain and support their long-term equity position in the Issuer, including in connection with any potential future equity or rights offerings that may be conducted by the Issuer.
- F2On June 16, 2022 the reporting person was granted stock options to purchase 200,000 shares of common stock which vested on September 27, 2022.