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.
Cerberus Capital Management II, L.P. and affiliated entities report updated ownership and transaction details relating to Eos Energy Enterprises, Inc. common stock. The Initial Reporting Persons may be deemed to beneficially own 175,829,986 shares of common stock, representing approximately 32.6% of the 364,167,744 shares outstanding as of August 3, 2026, including shares issuable upon exercise of a warrant and conversion of multiple series of preferred stock. The JV Reporting Persons may be deemed to beneficially own 20,017,772 shares of common stock issuable upon exercise of JV Warrants, representing about 5.2% of the outstanding common stock.
On August 4, 2026, Eos, CCM Frontier and an affiliate of Hudson Bay Capital Management LP completed funding of joint venture Frontier Power USA Parent, LLC. CCM Frontier contributed cash, assets and business value relating to the Frontier power platform in exchange for JV equity units and transfer of the 20,017,772-share JV Warrants. These warrants are exercisable at $5.481 per share, may be exercised for cash or on a cashless basis, expire on the tenth anniversary of issuance, are subject to anti-dilution adjustments, and may be redeemable by Eos beginning five years after issuance under specified conditions.
Related agreements include an amended and restated LLC agreement governing the joint venture, an exchange agreement allowing Hudson Bay to exchange Class C units of the JV for Eos common stock, and a letter agreement giving CCM Frontier rights to receive or purchase certain Class C units if such exchanges occur at $1.00 per unit. Eos granted customary resale registration rights for the JV Warrant shares, agreeing to file a Form S-3 within 30 calendar days of August 4, 2026 and to use best efforts to obtain effectiveness within 60 calendar days or shortly after SEC clearance. CCM Denali Equity also agreed to extend an existing lock-up restriction on its securities to December 21, 2026.
Eos Energy Enterprises, Inc. entered into an Amended and Restated Limited Liability Company Agreement with CCM Frontier JV Holdco, LLC and HBC MSF Capital Solutions Blocker II LLC to govern Frontier Power USA Parent, LLC, a joint venture focused on the company’s frontier power platform.
Eos contributed $112,637,878.86 for 112,637,879 Class B Units, while CCM Frontier contributed $100 million for 100,000,000 Class A-2 Units and received 50,000,001 Class A-1 founder units, and HBC contributed $50 million for 50,000,000 Class C Units. Governance is via a seven-member board with four managers appointed by CCM Frontier and up to three by Eos, with specified consent rights and distribution waterfalls targeting a 10% pre-tax IRR on invested capital.
The company also issued 20,017,772 CCM Warrants and 10,008,886 HBC Warrants, each exercisable for one share of common stock at $5.481 for ten years, granted HBC exchange rights for up to 50,000,000 Class C Units into up to 9,122,422 shares of common stock subject to a 9.8% ownership cap, agreed to related registration rights, and obtained a third amendment to its U.S. Department of Energy loan guarantee to permit the JV structure and related commercial arrangements, including the Thorn Hill site.
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.