SEC Form 4 · accession 0001628280-26-053916
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 21, 2026
Accepted (ET)
Aug 6, 2026 · 8:14 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 | Jul 21, 2026 | M | 111,118 | $5.48 | A | 2,058,704 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Subscription Rights (right to buy)F1 | $5.48 | Jul 21, 2026 | M | 111,118 | D | — | Jul 21, 2026 | Common Stock | 111,118 | 0 | D |
| Warrant (right to buy)F1,F2 | $5.48 | Jul 21, 2026 | M | 48,758 | A | — | — | Common Stock | 48,758 | 48,758 | D |
Explanation of responses
- F1Represents the conversion of a subscription right issued by the Issuer as part of a rights offering that closed on July 21, 2026 (the "Rights Offering"). Each subscription right was exercisable for units that consisted of (i) 1 share of common stock and (ii) 0.4388 of a warrant exercisable to acquire a share of common stock at an exercise price of $5.48 per share.
- F2Warrants became exercisable immediately after the Rights Offering closed and expire 10 years later, unless exercised or redeemed earlier. If a warrant is not exercised or redeemed before it expires, it will have no value.