Eos Energy Enterprises, Inc. Form 4 Filings

Eos Energy Enterprises, Inc. (symbol: EOSE) is the issuer of record for a Form 4 filing submitted to the SEC.

Eos Energy Enterprises, Inc. (symbol: EOSE) is the issuer of record for a Form 4 filing submitted to the SEC.

Eos Energy Enterprises, Inc. (symbol: EOSE) is the issuer of record for a Form 4 filing submitted to the SEC.

Eos Energy Enterprises, Inc. (symbol: EOSE) is the issuer of record for a Form 4 filing submitted to the SEC.

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.

Eos Energy Enterprises chief commercial officer and interim CFO Nathan Kroeker reported RSU vesting and related share sales. On July 3 and July 5, he exercised restricted stock units into a total of 158,618 shares of common stock at a conversion price of $0.00 per share.

On July 7, Kroeker sold 79,309 shares of common stock in open-market transactions at a weighted average price of $4.68 per share, under a pre-arranged Rule 10b5-1 trading plan adopted on September 15, 2025 to cover estimated tax withholding obligations tied to the RSU vesting. Following these transactions, he directly holds 777,110 shares of Eos Energy common stock.

Eos Energy Enterprises Chief Executive Officer Joe Mastrangelo reported routine equity compensation activity. On 2026-07-05, he exercised derivative awards for 254,304 shares of common stock at a stated price of $0.0000 per share, converting restricted stock units into stock under the company’s 2020 Incentive Plan.

On 2026-07-06, 121,245 shares of common stock were withheld to satisfy tax obligations related to the vested RSU award. This tax-withholding disposition is not an open‑market sale. After these transactions, Mastrangelo directly owned 1,773,406 shares of Eos Energy common stock.

Eos Energy Enterprises Chief Accounting Officer Sumeet Puri reported routine equity activity tied to restricted stock units. On June 26, 2026, he exercised 17,545 RSUs, converting them into the same number of common shares at $0.00 per share, and his RSU balance became 35,389 units.

On June 30, 2026, he then sold 8,823 common shares at a weighted average price of $5.86, in multiple trades between $5.68 and $6.12. According to the filing, these sales were executed automatically under a Rule 10b5-1 trading plan adopted on September 12, 2025 to cover estimated tax withholding obligations related to RSU vesting.

After these transactions, Puri directly owns 173,112 shares of common stock, in addition to his remaining RSUs. The activity reflects compensation-related vesting and tax coverage rather than a discretionary change in his overall stake.

Eos Energy Enterprises Chief Administration Officer Michelle Buczkowski reported a mix of equity award vesting and related share sales. On June 26, 2026, 22,938 restricted stock units converted into the same number of common shares at $0.00 per share under a company incentive plan.

On June 30, 2026, she sold 11,469 common shares in open-market transactions at a weighted-average price of $5.87 per share, effected automatically under a pre-arranged Rule 10b5-1 trading plan to cover estimated tax-withholding obligations tied to the vesting. After these transactions, she directly holds 59,242 common shares and 45,876 restricted stock units.

Eos Energy Enterprises Chief Legal Officer Michael W. Silberman reported routine equity compensation activity and a related tax sale. On June 26, 2026, he exercised 29,996 Restricted Stock Units, receiving the same number of common shares at a conversion price of $0.00 per share. On June 30, 2026, he sold 14,998 common shares in an open-market transaction at a weighted average price of $5.87 per share, with individual trades ranging from $5.68 to $6.18. According to the disclosure, this sale was executed automatically under a Rule 10b5-1 trading plan adopted on September 15, 2025 to cover estimated tax withholding obligations tied to RSU vesting. After these transactions, Silberman directly holds 298,277 common shares and 59,991 RSUs that will vest in three equal annual installments under the company’s 2020 Incentive Plan.

Eos Energy Enterprises CCO and Interim CFO Nathan Kroeker reported a combination of option-style vesting and a share sale. On June 26, 2026, he exercised 70,578 Restricted Stock Units, converting them into the same number of common shares at a stated price of $0.00 per share. On June 30, 2026, he then sold 35,289 common shares in an open-market transaction at a weighted average price of $5.86 per share, with actual prices ranging from $5.66 to $6.19. The filing notes these sales were made automatically under a pre-arranged Rule 10b5-1 trading plan adopted to cover estimated tax withholding obligations related to RSU vesting. Following the transactions, Kroeker directly holds 697,801 common shares and 141,157 RSUs, which continue to vest in three equal annual installments subject to continued service.

Eos Energy Enterprises Chief Executive Officer Joe Mastrangelo reported routine equity compensation activity involving restricted stock units (RSUs). On June 26, 2026, he exercised RSUs to acquire 130,570 shares of common stock at a conversion price of $0.00 per share under the company’s 2020 Incentive Plan.

In connection with this vesting, on June 30, 2026 the company withheld 60,703 common shares at a value of $6.09 per share to cover tax obligations, which is recorded as a disposition but not an open-market sale. After these transactions, Mastrangelo directly holds 1,640,347 shares of common stock and 261,140 RSUs, with each RSU representing a contingent right to receive one share of common stock.

Eos Energy Enterprises CEO Joe Mastrangelo exercised stock options and increased his direct share ownership. He exercised options for 200,000 shares of common stock at an exercise price of $1.34 per share and retained the underlying shares. To cover tax obligations on this compensation event, 116,646 shares of common stock were disposed of at a reference price of $6.06 per share, a non-market tax-withholding mechanism rather than an open-market sale. After these transactions, he directly holds 1,570,480 shares of common stock. A footnote explains the options were Non-Qualified Stock Options granted in June 2022, fully vested in September 2022, and that he chose to keep the net shares to support a long-term equity position, including in connection with any potential future equity or rights offerings by the company.

Bornstein Jeffrey S reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises director Jeffrey S. Bornstein received a grant of restricted stock units. On the reported date, he was awarded 24,289 RSUs, each representing a contingent right to receive one share of Eos Energy common stock.

The RSUs were granted at no cash cost and will vest on the earlier of the first anniversary of the grant date or immediately before the company’s next annual shareholders meeting following the grant. After this grant, Bornstein holds 24,289 RSUs directly.

Nigro Joseph reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises director Joseph Nigro was granted 24,289 restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of common stock and will settle in cash or common stock.

The RSUs vest on the earlier of the first anniversary of the grant date or immediately before the company’s next annual shareholders meeting following the grant date. After this grant, Nigro holds 24,289 RSUs directly.

McNeil Jeff reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises director Jeff McNeil received a grant of 18,217 restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of common stock. The RSUs will vest on the earlier of the first anniversary of the grant date or immediately before the company’s next annual shareholders meeting.

Demby Claude reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises director Claude Demby received a new equity award in the form of restricted stock units. On June 5, 2026, he was granted 18,217 RSUs, each representing a contingent right to receive one share of common stock. The award was granted at a price of $0.00 per unit as part of compensation, not an open-market purchase. These RSUs will vest on the earlier of the first anniversary of the grant date or immediately before the company’s next annual shareholders meeting, and may settle in cash or common stock. Following this grant, Demby holds 18,217 RSUs directly.

Walters Marian reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises director Marian Walters received a grant of 21,253 restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of common stock. The RSUs vest on the earlier of the first anniversary of the June 5, 2026 grant date or immediately before the company’s next annual shareholders meeting.

Urban David reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises director David Urban reported receiving a grant of restricted stock units as equity-based compensation. He was awarded 18,217 RSUs, each representing a contingent right to receive one share of common stock or a cash payment. These RSUs will vest on the earlier of the first anniversary of the grant date or immediately before the company’s next annual shareholders meeting following the grant date. After this grant, Urban’s reported derivative holdings from this award total 18,217 RSUs tied to common stock.

Nixon Gregory S. reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises director Nixon Gregory S. received a grant of 18,217 restricted stock units. Each RSU represents a right to one share of common stock and will settle in cash or common stock. The RSUs vest on the earlier of one year from grant or immediately before the company’s next annual shareholder meeting. Following this award, he holds 18,217 RSUs directly.

DIMITRIEF ALEXANDER reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises director Alexander Dimitrief received a compensation grant of 21,253 restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of common stock. The RSUs vest on the earlier of the first anniversary of the grant date or immediately before the company’s next annual shareholders meeting.

The award settles in either cash or common stock, as provided in the grant terms. Following this grant, Dimitrief holds 21,253 RSUs directly, with no open-market purchase or sale involved in this filing.

Lagi Alessandro reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises, Inc. reported that Chief Financial Officer Alessandro Lagi received a grant of 277,773 Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of common stock. Following this grant, he holds 277,773 RSUs directly.

The RSUs were granted under the company’s 2020 Incentive Plan and 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. This is a compensation-related award, not an open-market purchase or sale.

Eos Energy Enterprises director Joseph Nigro exercised restricted stock units into common shares. He converted 3,565 restricted stock units, each representing the right to receive one share of common stock, into 3,565 shares of common stock at a stated price of $0.00 per share. No shares were sold in this filing, and his directly held common stock position increased to 38,950 shares following the transaction. The exercised restricted stock unit award now shows zero derivative units remaining.

Eos Energy Enterprises director Marian Walters reported an equity compensation event rather than an open‑market trade. Walters exercised restricted stock units, converting 1,782 RSUs into 1,782 shares of common stock at a stated price of $0.00 per share.

Following this transaction, Walters holds 160,227 shares of common stock directly. An additional 5,000 common shares are held indirectly through the D. and M. Walters Family Trust dated July 6, 2020, where David and Marian Walters serve as trustees.

Eos Energy Enterprises director Marian Walters exercised stock options and sold shares in a paired transaction. Walters exercised options to acquire 30,000 shares of common stock at $1.18 per share and on the same date sold 30,000 shares at $9.18 per share in an open-market sale. Following these moves, Walters directly holds 158,445 common shares and 35,018 stock options, and is also shown with indirect ownership of 5,000 shares held by the D. and M. Walters Family Trust.

Eos Energy Enterprises director Marian Walters exercised stock options and sold the resulting shares. Walters exercised options for 22,319 shares of common stock at $1.18 per share, then sold 22,319 shares in an open-market transaction at a weighted average price of $7.20 per share.

After these transactions, Walters directly holds 158,445 shares of common stock and 65,018 stock options. An additional 5,000 shares are held indirectly through the D. and M. Walters Family Trust dated July 6, 2020.

Eos Energy Enterprises director Jeff McNeil reported routine equity compensation activity involving restricted stock units. He exercised 23,111 RSUs into an equal number of shares of common stock at a price of $0.00 per share, increasing his directly held common stock.

Following the transaction, McNeil directly owns 122,290 shares of common stock. A separate entry shows an additional 227,272 common shares held indirectly by Jeff and Nanci McNeil as trustees of the 2022 Jeff McNeil and Nanci McNeil Charitable Remainder Unitrust.

Eos Energy Enterprises director Jeffrey S. Bornstein reported compensation-related updates involving restricted stock units (RSUs) and common stock. He exercised 30,815 RSUs tied to an equal number of common shares, but a footnote explains these RSUs were settled in cash at $6.88 per unit, so no shares were actually issued or disposed of. After these entries, he reports direct ownership of 134,248 common shares and an additional 1,500 shares held indirectly by his spouse. The filing reflects routine equity compensation accounting rather than open-market buying or selling.

Eos Energy Enterprises director Claude Demby reported routine equity compensation activity involving restricted stock units (RSUs). On May 19, 2026, 23,111 RSUs granted on May 19, 2025 were settled in cash at $6.88 per unit, based on the company’s closing stock price that day.

According to the footnotes, no shares of common stock were actually issued to Demby and he did not dispose of any shares in connection with this settlement. After these entries, he continues to hold 155,575 shares of common stock directly.

Eos Energy Enterprises director Alexander Dimitrief reported compensation-related activity involving restricted stock units (RSUs). On May 19, 2026, 26,963 RSUs granted on May 19, 2025 were cash settled at $6.88 per unit. According to the disclosure, no common shares were actually issued or disposed. Following these entries, he reports 251,399 common shares held directly and 10,000 common shares held indirectly by his spouse, indicating a routine equity compensation settlement without open-market buying or selling.

Eos Energy Enterprises director Gregory S. Nixon reported compensation-related activity involving restricted stock units. On May 19, 2026, previously granted RSUs were cash settled at $6.88 per unit, the closing price of the company’s common stock that day. Footnote disclosure states no shares were actually issued to Nixon and he did not dispose of any shares in connection with this settlement. Following these transactions, he holds 13,867 shares of common stock directly.

Eos Energy Enterprises director Marian Walters reported a mix of option exercises and share sales in common stock. Walters exercised restricted stock units and stock options covering a total of 30,792 shares, including 7,681 options at an exercise price of $1.18 per share, then sold 7,681 shares in an open-market transaction at a weighted average price of $7.07 per share, with trade prices ranging from $7.01 to $7.24. After these transactions, Walters holds 135,334 shares directly and 5,000 shares indirectly through the D. and M. Walters Family Trust.