The litigation centers on claims that Fluence failed to disclose critical vulnerabilities in its manufacturing strategy. While the company publicly maintained it was well-positioned to meet demand for its Gridstack Pro battery solutions, the complaint alleges that revenue projections relied on incomplete and non-operational facilities. Management reportedly obscured the fact that remediation efforts at these sites were failing, leaving the company unable to fulfill its delivery backlog.

Signs of trouble emerged on February 4, 2026, when the company revealed significant margin compression and rising net losses. The situation deteriorated through August 2026, culminating in a September announcement where the company slashed its revenue guidance by 20%. CEO Julian Nebreda Marquez attributed the shortfall to persistent delays at a Houston facility, specifically citing an inability to implement automated welding processes. This forced the company to rely on manual labor, further stalling production.

Between the first disclosure in February and mid-September, Fluence shares plummeted by 73%, or $21.33 per share. Hagens Berman, the firm leading the investigation, is now scrutinizing when exactly management became aware of the welding defects. With a lead plaintiff deadline set for November 27, 2026, the firm is seeking both impacted investors and potential whistleblowers to assist in the case.