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The complaint, filed on May 27, 2026, in the U.S. District Court for the Northern District of California, alleges that Calix and two senior executives celebrated eight consecutive quarters of gross margin improvement and a record 58% non-GAAP gross margin without revealing, according to the complaint, that first-quarter margins had significantly benefited from advanced purchasing of memory components and that the company’s advanced supply was dwindling. When the company reported first-quarter 2026 earnings after the market closed on April 21, 2026, it disclosed that the advanced memory supply had “run its course” and that margins would decline. The following day, CALX shares fell $6.93, or 13.98%, closing at $42.65 on unusually heavy trading volume. The lawsuit covers a class period from January 28, 2026, through April 21, 2026.
If you purchased CALX shares during this period, you may want to learn more about this case and whether you are eligible to participate.
A Cloud and Software Platform Built on Broadband Infrastructure
Calix delivers the Calix One platform, a cloud and software system paired with network appliances and managed services designed to serve broadband and communications service providers. Calix’s public materials describe its customer base as communications service providers primarily in North America, including regional providers, cooperatives, municipalities, fiber overbuilders, and other broadband operators.
