Welcome to our dedicated page for Eos Energy Enterprises SEC filings (Ticker: EOSE), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Eos Energy Enterprises, Inc. filings document the regulatory record of a Nasdaq-listed manufacturer of zinc-based battery energy storage systems. Recent Form 8-K reports disclose operating results and preliminary financial information, manufacturing and capacity updates, amendments to a U.S. Department of Energy loan guarantee agreement, senior convertible notes, and other capital-structure matters tied to the company’s funding plan.
Proxy and governance filings cover annual meeting matters, board elections, committee assignments, executive compensation, equity awards, indemnification arrangements, and stockholder voting procedures. The filing record also includes executive employment agreements and director appointments, giving formal disclosure around leadership structure, compensation terms, common stock registration, and material agreements.
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, Inc. has filed a preliminary prospectus supplement for a registered direct offering of common stock together with detachable warrants. The company states net offering proceeds are intended to be contributed to a newly formed joint venture, Frontier, in exchange for Class B Units at $1.00 per unit.
The supplement discloses concurrent grants of 20,017,772 warrants to CCM and 10,008,886 warrants to HBC exercisable at $5.481 per share as partial consideration for those investors’ commitments to the joint venture. Shares outstanding were 339,459,021 as of March 31, 2026. The prospectus supplement includes detailed terms for the offered warrants, cashless exercise mechanics and anti-dilution adjustments.
Eos Energy Enterprises outlined a major financing and joint venture plan centered on a new Frontier Power JV with Cerberus and Hudson Bay affiliates. CCM Frontier is expected to receive 50,000,001 Class A-1 units and invest $100 million for 100,000,000 Class A-2 units, while HBC plans to invest $50 million for 50,000,000 Class C units.
The Company intends to fund its Class B investment through a rights offering targeting $150 million, with units priced at $5.481 and including one common share plus 0.4388 of a warrant. CCM Frontier and HBC are also expected to receive long-dated warrants, and HBC’s Class C units carry exchange rights into common shares. The Department of Energy and CCM lenders have provided limited consents, but completion of the structure remains subject to multiple closing conditions.
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.