Baidu Faces Securities Class Action Over Claims AI Business Offset Legacy Decline
A securities class action filed in New York accuses Baidu (NASDAQ: BIDU) of misleading investors about how well its AI business could offset a steep decline in its legacy online marketing operations. The Law Offices of Frank R. Cruz announced the case, which covers purchases made from November 18, 2025 to August 17, 2026.
- A class action against Baidu covers investors who bought securities from November 18, 2025 to August 17, 2026.
- The case was filed September 14, 2026 in the Southern District of New York (Case No. 26-cv-08012).
- The complaint alleges Baidu overstated the ability of its AI business to offset legacy online marketing declines.
- Baidu ADS fell 12.73% to $90.87 on August 18, 2026 after second quarter results.
- Lead plaintiff motions are due November 13, 2026; no class has been certified.
What the lawsuit alleges
The case is Rosewood Funeral Home, Inc. v. Baidu, Inc. et al., filed on September 14, 2026 in the U.S. District Court for the Southern District of New York (Case No. 26-cv-08012). It was filed on behalf of investors who acquired Baidu securities during the class period.
According to the complaint as described by the law firm, defendants made materially false or misleading statements and failed to disclose adverse facts about Baidu's business, operations and prospects. The complaint alleges three failures to disclose:
- Baidu had overstated the ability of its AI business to mitigate rapid declines in its legacy online marketing business.
- As a result, the company's revenue was reasonably likely to decline.
- Defendants' positive statements about the business were therefore materially misleading or lacked a reasonable basis.
These are allegations from a complaint, and no class has been certified yet.
The earnings reports behind the stock drops
The law firm points to two earnings releases. On February 26, 2026, Baidu reported fourth quarter and full year 2025 results. Total revenue fell more than 4% year over year for the quarter to RMB32.74 billion (or $4.68 billion), and fell more than 3% for the full year to RMB129.079 billion (or $18.458 billion). Management said its "AI-Powered Business" grew 48% year over year to RMB40 billion for fiscal year 2025. Baidu American Depositary Shares fell $7.50, or 5.65%, to close at $125.15 that day.
On August 18, 2026, Baidu reported second quarter 2026 results. According to the release, Baidu General Business revenue fell 4% year over year to RMB25.2 billion (or $3.71 billion). Legacy Business revenue fell 23% to RMB10.4 billion, and total Online Marketing Services revenue fell 19% to RMB13.1 billion.
The Baidu Core AI-powered business fell 8% quarter over quarter to RMB12.5 billion (or $1.86 billion). Its year-over-year growth slowed from 49% in the first quarter of 2026 to 25%. Its largest component, AI Cloud Infra, dropped 17% quarter over quarter from RMB8.8 billion to RMB7.3 billion. The ADS fell $13.25, or 12.73%, to close at $90.87 on August 18, 2026.
Deadline and options for investors
Investors who want to serve as lead plaintiff must file a motion with the court by November 13, 2026. The lead plaintiff is appointed by the court to represent all class members and direct the action. According to the firm, investors who bought during the class period can also take no action and remain absent class members, and they do not need to be lead plaintiff to share in any recovery.
The firm says it works on contingency, so investors pay no attorneys' fees unless there is a recovery, and any fees require court approval. Investors may retain counsel of their choice. The announcement is attorney advertising, and the firm notes that prior results do not guarantee a similar outcome.
What it means
The case centers on a question that matters to Baidu's investors: whether growth in AI products can make up for a shrinking advertising business. The figures cited in the release show the company's AI-powered revenue slowing and falling sequentially in the second quarter of 2026, while the legacy business declined sharply. The claims remain unproven allegations, and the court has yet to appoint a lead plaintiff or certify a class.
