Multiple law firms announced on October 13, 2026, the filing of a securities fraud class action against Alphabet Inc. The lawsuit alleges that Alphabet and some senior executives misrepresented development progress on its Gemini 3.5 Pro AI model.
The complaint links the lawsuit to a 4.4% drop in Alphabet’s stock price on July 16, 2026. It alleges that Alphabet misled investors about setbacks involving the model’s coding and training data.
The case, captioned Stewart v. Alphabet Inc., et al., was filed in the U.S. District Court for the Northern District of California. Law firms are encouraging investors who suffered losses to seek lead plaintiff status by December 1, 2026.
The case adds litigation risk and scrutiny of Alphabet’s AI-related disclosures and performance.