Law firms urge Baidu investors to join securities class action

BIDU ADS closed at $90.87 on August 18, 2026 after a one-day drop of $13.25, or 12.73%, on unusually heavy volume. Law firms including Levi & Korsinsky are urging investors who bought Baidu securities between November 18, 2025 and August 17, 2026 to join a securities class action. The lead plaintiff deadline is November 13, 2026. Shares hit a Class Period high of $162.52 on January 22, 2026 and fell $7.50, or 5.65%, on February 26, 2026 after Q4 revenue of RMB32.7 billion and full-year 2025 revenue of RMB129.1 billion. The complaint alleges Baidu overstated the ability of its AI-powered business to absorb legacy online marketing declines and that positive statements lacked a reasonable basis. On November 18, 2025 the company reported Q3 total revenue of RMB31.2 billion, down 7% year over year, Core online marketing revenue down 18%, and AI-powered revenue up over 50% to roughly RMB10 billion, framed as cushioning the softness. Joseph E. Levi, Esq. said: "Timely disclosure of material developments is fundamental to fair and efficient markets. Here, the sequence of reported results raises important questions about whether investors were given an accurate picture of how much of the legacy revenue decline the AI-powered business could actually absorb." Baidu's March 17, 2026 Form 20-F stated it was not aware of trends reasonably likely to have a material adverse effect on revenue. May 18, 2026 results showed Core AI-powered Business revenue above RMB13.6 billion, up 49% year over year. Q2 2026 Legacy Business revenue fell 23% year over year to RMB10.4 billion. Lead-plaintiff motions close November 13, 2026.