Investors who purchased shares in a battery manufacturing company are seeking legal recourse after the firm reported revenues far below its own projections, leading to a sharp decline in share price and allegations of misleading public statements. The complaint was filed by Shui Shing Yung on March 6, 2026, in the United States District Court for the District of New Jersey against Eos Energy Enterprises, Inc., along with its Chief Executive Officer Joe Mastrangelo and Chief Financial Officer Nathan Kroeker.
According to the filing, the lawsuit is brought as a class action on behalf of all persons and entities that acquired Eos Energy securities between November 5, 2025, and February 26, 2026. The complaint alleges violations of federal securities laws under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934. Eos Energy is described as a company that designs, manufactures, and markets zinc-based battery energy storage systems intended for utility-scale commercial and industrial applications.
The dispute centers on statements made by Eos Energy throughout fiscal year 2025 regarding its automated manufacturing systems and projected financial performance. The company had forecasted full-year revenues between $150 million and $160 million but ultimately reported only $114.2 million for 2025. This figure was released on February 26, 2026, before market opening, alongside disclosures of a gross loss of $143.8 million, a net loss attributable to shareholders of $969.6 million, and an adjusted EBITDA loss of $219.1 million.
In its announcement, Eos Energy acknowledged that “full year’s revenue was below expectations” and revealed that its “capacity milestone was reached 5 weeks later than initially planned.” During earnings calls held on the same day as these disclosures, Chief Operating Officer John Mahaz stated: “issues prevented us from delivering our commitments,” citing that “battery line downtime ran well above industry norms, the design intent of the line and our internal forecast,” as well as delays in meeting quality targets for automated bipolar production lines which led to rework and lost revenue.
Following these announcements, Eos Energy’s stock price fell by $4.39 per share—a drop of approximately 39.4%—to close at $6.74 on February 26, 2026 amid unusually heavy trading volume.
The complaint asserts that during the class period defendants made materially false or misleading statements or failed to disclose adverse facts about business operations. Specifically cited are failures to inform investors about challenges achieving production ramp-up goals; higher-than-expected battery line downtime; delays in automated production meeting quality standards; inadequate internal systems for providing accurate guidance; and overall misrepresentation regarding business prospects.
Plaintiff Shui Shing Yung alleges that these omissions caused investors to purchase shares at artificially inflated prices based on inaccurate information about the company’s financial health and operational efficiency. The lawsuit claims that when true conditions were revealed through public disclosures in late February 2026, shareholders suffered significant losses due to rapid declines in market value.
The legal arguments presented include claims under Section 10(b) for making untrue statements or omitting material facts necessary to make other statements not misleading; employing devices or schemes to defraud; engaging in acts or practices operating as fraud upon purchasers; as well as Section 20(a) liability against individual defendants as controlling persons within the meaning of federal law.
Plaintiffs seek compensatory damages for themselves and all similarly situated investors who acquired Eos Energy securities during the specified period. They also request reimbursement for costs incurred during litigation—including counsel fees—and any further relief deemed appropriate by the court. A jury trial has been demanded.
Attorneys representing Shui Shing Yung include James E. Cecchi, Donald A. Ecklund, and Kevin G. Cooper from Carella Byrne Cecchi Brody & Agnello P.C.; Robert V. Prongay and Charles H. Linehan from Glancy Prongay Wolke & Rotter LLP; Rebecca Dawson from Glancy Prongay Wolke & Rotter LLP; and Corey D. Holzer from Holzer & Holzer LLC (Case No.: 2:26-cv-02372).
Source: 226cv02372_Yung_v_EOS_Energy_Enterprises_Inc_Complaint_District_New_Jersey.pdf