Why Eos Energy Stock Just Hit a 52-Week Low After a 49% Plunge in the First Half of 2026

Eos Energy's stock plummeted 49% in the first half of 2026 and hit a 52-week low of $3.65, despite the company's zinc-based battery technology showing promise and a $701.5 million backlog. The decline was driven by missed revenue guidance, a $970 million net loss, production delays, class action lawsuits, and share dilution concerns. While the company has demonstrated operational improvements and secured a $100 million partnership with Cerberus Capital, investors remain skeptical until profitability and production consistency are proven.