Every Form 4 that Eos Energy Enterprises, Inc. Right (EOSER) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow EOSER and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full EOSER filings page.
Eos Energy Enterprises, Inc. reports that Cerberus-affiliated reporting persons, through CCM Frontier JV Holdco, LLC, indirectly acquired warrants to purchase 20,017,772 shares of common stock. These JV Warrants are immediately exercisable at an exercise price of $5.481 per share and are governed by a warrant agreement with a corporate warrant agent.
The acquisition occurred in connection with funding Frontier Power USA Parent, LLC, a joint venture among Eos, CCM Frontier and an affiliate of Hudson Bay Capital. CCM Frontier directly holds the JV Warrants; related Cerberus entities may be deemed to indirectly beneficially own them but each, other than CCM Frontier, disclaims beneficial ownership beyond its pecuniary interest.
Eos Energy Enterprises CEO Joe Mastrangelo exercised subscription rights in a rights offering that closed on July 21, 2026, acquiring 111,118 shares of common stock at an exercise price of $5.48 per share and 48,758 warrants. His direct common-stock holdings rose to 2,058,704 shares, and he now holds 48,758 warrants exercisable at $5.48 that expire 10 years after the rights offering closed. The original subscription rights were fully converted and no longer outstanding.
Eos Energy Enterprises director Alexander Dimitrief participated in a Rights Offering that closed on July 21, 2026, converting subscription rights into 17,897 common shares and 7,853 warrants directly, and 1,377 shares and 603 warrants indirectly through his spouse at an exercise price of $5.48 per share. Following these exercises, he held 269,296 common shares directly and 11,377 indirectly, plus warrants that are immediately exercisable and expire 10 years after the Rights Offering closes, unless exercised or redeemed earlier.
Eos Energy Enterprises, Inc. director Marian Walters exercised 11,407 subscription rights on July 21, 2026, in connection with a Rights Offering. Each right converted into 1 share of common stock and 0.4388 of a warrant at an exercise price of $5.48 per share, resulting in 11,407 common shares and 5,005 warrants. Following the transactions, Walters holds 171,634 common shares directly and 5,000 shares indirectly through the D. and M. Walters Family Trust. The warrants became exercisable immediately after the Rights Offering closed and expire 10 years later unless exercised or redeemed earlier.
Jeffrey S. Bornstein, a director of Eos Energy Enterprises, exercised 9,558 subscription rights in a rights offering that closed on July 21, 2026, receiving 9,558 shares of common stock at a $5.48 exercise price and 4,194 warrants. He now holds 143,806 common shares directly, 1,500 shares indirectly via his spouse, and 4,194 warrants that became immediately exercisable and expire 10 years after the rights offering unless exercised or redeemed earlier.
Eos Energy Enterprises director David Urban exercised subscription rights from a rights offering that closed July 21, 2026, converting 12,185 rights into 12,185 common shares at $5.48 per share and 5,347 warrants. The subscription rights position fell to zero, leaving him with 97,767 common shares and 5,347 warrants.
Eos Energy Enterprises director Joseph Nigro exercised subscription rights in a Rights Offering that closed on July 21, 2026, converting 2,773 subscription rights into 2,773 shares of common stock at an exercise price of $5.48 per share and receiving 1,217 warrants.
The transaction eliminated his subscription right position and left him holding 41,723 common shares directly, plus 1,217 warrants that became exercisable immediately and will expire 10 years after the Rights Offering if not exercised or redeemed earlier.
Eos Energy Enterprises, Inc. reported that Chief Administration Officer Michelle Buczkowski exercised subscription rights from a rights offering that closed on July 21, 2026, converting them into 2,585 shares of common stock at $5.48 per share and receiving 1,134 warrants. After these transactions she directly holds 61,827 common shares and 1,134 warrants, each warrant exercisable to acquire a share of common stock at $5.48 per share.
Eos Energy Enterprises director Claude Demby exercised 1,825 subscription rights in a July 21, 2026 rights offering at $5.48 per share, receiving 1,825 shares of common stock and 801 warrants. After these conversions, he holds 157,400 common shares directly and 801 warrants, which are immediately exercisable and expire 10 years after the rights offering closing.
Eos Energy Enterprises, Inc. Chief Commercial Officer Nathan Kroeker exercised subscription rights in a July 21, 2026 rights offering, converting 16,944 rights into 16,944 shares of common stock at $5.48 per share and receiving 7,435 warrants. Following these transactions he holds 904,471 common shares directly and 7,435 warrants exercisable at $5.48 per share, while the subscription rights position was fully converted.
Eos Energy Enterprises, Inc. reported that Chief Accounting Officer Sumeet Puri converted 58,334 restricted stock units into common stock on July 25, 2026 and, on July 28, 2026, sold 29,167 common shares at a weighted average price of $3.36 under a Rule 10b5-1 trading plan adopted on September 15, 2025 to cover estimated tax withholding from the RSU vesting.
Nathan Kroeker, Chief Commercial Officer of Eos Energy Enterprises, converted 220,834 restricted stock units into the same number of common shares on July 25, 2026 under the company’s 2020 Incentive Plan. Each RSU represents a right to receive one share and vests in three annual installments, subject to continued service.
On July 28, 2026, he sold 110,417 common shares at a weighted average price of $3.36 per share, in multiple trades between $3.23 and $3.48. These sales were executed automatically pursuant to a Rule 10b5-1 trading plan adopted on September 15, 2025 to cover estimated tax withholding obligations arising from the RSU vesting.
Eos Energy Enterprises, Inc. director and Chief Executive Officer Joe Mastrangelo reported equity transactions involving restricted stock units (RSUs) and common stock. On July 25, 2026, 333,334 RSUs, each representing a contingent right to one share of common stock, were converted into 333,334 shares of common stock at $0.00 per share, leaving 333,333 RSUs outstanding. On July 27, 2026, 159,154 shares of common stock at $3.61 per share were withheld to satisfy tax obligations arising from a vested RSU award under the company’s Amended and Restated 2020 Incentive Plan.
Nigro Joseph reported acquisition or exercise transactions in this Form 4 filing.
Eos Energy Enterprises, Inc. reported that director Joseph Nigro received a grant of 5942.0000 Restricted Stock Units (RSUs) on 2026-07-23 as part of the company’s annual compensation review and market benchmarking. Each RSU represents a contingent right to receive one share of common stock and will settle in common stock. The RSUs vest on the earlier of the first anniversary of the grant date or immediately prior to the next annual shareholders meeting following the grant date. Following this award, Nigro holds 5942.0000 RSUs directly.
Walters Marian reported acquisition or exercise transactions in this Form 4 filing.
Eos Energy Enterprises director Marian Walters received a grant of 5,942 restricted stock units on July 23, 2026 as part of the company’s annual compensation review and market benchmarking. Each RSU represents a right to one share of common stock and will vest on the earlier of the first anniversary of the grant or immediately before the next annual shareholders meeting. After this award, Walters holds 5,942 RSUs directly.
DIMITRIEF ALEXANDER reported acquisition or exercise transactions in this Form 4 filing.
Eos Energy Enterprises, Inc. reported that director Alexander Dimitrief received a grant of 5,942 restricted stock units (RSUs) on July 23, 2026 as part of its annual compensation review. Each RSU represents one share of common stock and will vest on the earlier of one year from grant or immediately before the next annual shareholders meeting, leaving him with 5,942 RSUs held directly.
Song Haiyan reported acquisition or exercise transactions in this Form 4 filing.
Eos Energy Enterprises director Haiyan Song reported the grant of 29,980 Restricted Stock Units (RSUs) on July 13, 2026. Each RSU represents a contingent right to receive one share of common stock and may settle in cash or stock. The RSUs vest on the earlier of the first anniversary of the grant date or immediately before the next annual shareholders meeting, and Song holds 29,980 RSUs directly following this award.
Martin Marie Batz reported acquisition or exercise transactions in this Form 4 filing.
Eos Energy Enterprises, Inc. reported that Chief Legal Officer Martin Marie Batz received a grant of 216,731 restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of common stock. The RSUs were granted at no cash cost and will vest in three installments on each of the first three anniversaries of the grant date, subject to continued service. Following the grant, Batz holds 216,731 RSUs directly.