Welcome to our dedicated page for Eos Energy Enterprises SEC filings (Ticker: EOSEW), 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.
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Cerberus Capital Management II and its affiliates report a 32% beneficial stake in Eos Energy Enterprises, Inc. common stock. They may be deemed to beneficially own 159,587,654 shares, including common shares and shares issuable from a warrant and multiple preferred stock series.
The position reflects an antidilution adjustment that increased the common shares issuable from Series B-4 Preferred Stock. Eos also satisfied final performance milestones under a Credit Agreement on October 31, 2025, so no additional securities are currently contemplated there. In March 2026, Cerberus affiliate executive Nathaniel Fick joined Eos’s board as a Class III director and was appointed to the Nominating and Corporate Governance Committee.
Eos Energy Enterprises is asking stockholders at its virtual annual meeting on June 3, 2026 to approve several key items. Proposals include electing three Class III directors, ratifying Deloitte & Touche LLP as auditor for 2026, and a non-binding advisory vote on executive pay.
The company is also seeking approval to amend its charter to increase authorized common stock from 600,000,000 to 800,000,000 shares and to amend its Second Amended and Restated 2020 Incentive Plan, which governs long-term equity awards. The proxy details a largely independent, classified board with three preferred-stock-appointed directors, extensive committee structure, and expanded use of performance-based RSUs and relative total shareholder return metrics in executive compensation. CEO Joe Mastrangelo’s 2025 total compensation was $4,854,452, heavily weighted toward equity awards tied to multi-year performance.
Eos Energy Enterprises released preliminary results indicating first quarter 2026 revenue of $56–$57 million, driven by record shipments and improved manufacturing performance. The company reported a 17% quarter-over-quarter increase in shipments, alongside higher battery and bipolar output, reflecting better throughput and process stability.
Eos highlighted operational initiatives in supplier quality, lean processes, and equipment optimization, as well as progress on its second battery production line, which is expected to begin initial production by the end of the second quarter. New senior hires in sales and project delivery are intended to help convert growing demand into completed projects.
Eos Energy Enterprises director Nathaniel Fick has filed an SEC Form 3, which is an initial statement of beneficial ownership. This filing establishes his status as a reporting insider of the company but, in the provided data, does not show any share purchases, sales, or option exercises.
Eos Energy Enterprises Inc filing an amendment to a Schedule 13G/A reports that The Vanguard Group beneficially owns 0 shares of Common Stock as of the amendment, reflecting an internal realignment completed January 12, 2026 that disaggregated certain subsidiaries' holdings from The Vanguard Group, Inc.
The filing states Vanguard has no voting or dispositive power over EOSE common shares and confirms ownership is five percent or less.
Eos Energy Enterprises director David Urban bought additional company stock in the open market. On March 9, 2026, he purchased 16,250 shares of common stock at a weighted average price of $6.16 per share, with individual trade prices ranging from $6.15 to $6.16. Following this purchase, he directly owns 62,471 shares.
Eos Energy Enterprises Chief Executive Officer Joe Mastrangelo reported an open-market purchase of 23,900 shares of common stock at a price of $6.58 per share. Following this transaction, he directly owns a total of 1,487,126 shares of Eos Energy Enterprises common stock.
Eos Energy Enterprises director Alexander Dimitrief bought additional shares of the company’s common stock in the open market. On March 2, 2026, he purchased 15,000 shares at a price of $6.04 per share, increasing his direct holdings to 235,221 shares.
The filing also notes an additional 10,000 shares of common stock held indirectly by his spouse, reported as indirect ownership. This Form 4 highlights continued equity ownership by a board member through a meaningful open-market purchase.
Eos Energy Enterprises Chief Executive Officer Joe Mastrangelo purchased 60,000 shares of common stock in the open market. The transactions occurred on March 2, 2026 at a weighted average price of $5.75 per share, with individual trade prices ranging from $5.74 to $5.75. Following these purchases, he directly owns 1,463,226 common shares.
Eos Energy Enterprises describes a rapidly growing but still unprofitable zinc‑based battery storage business focused on long‑duration grid and data‑center applications. The company posted a net loss of $969.6 million for the year ended December 31, 2025, up from $685.9 million in 2024, and continues to warn that it expects further losses as it scales manufacturing and invests in its Z3 platform and software.
Eos highlights differentiated, non‑flammable U.S.-made zinc batteries, new products such as the Z3 module, DawnOS controls and Indensity high‑density storage architecture, and strong policy tailwinds from the Inflation Reduction Act and the One Big Beautiful Bill Act. To expand capacity to 8 GWh, it has a DOE‑guaranteed loan facility of up to $303.5 million and had drawn $90.9 million across Tranche 1 by December 31, 2025. The company employed 787 full‑time staff, had an aggregate public float value of about $1.283 billion as of June 30, 2025, and 339,434,259 shares outstanding as of February 24, 2026, while emphasizing significant business, financing, execution, supply‑chain and competitive risks.