Baidu Faces Securities Class Action Over AI Business Claims, Lead Plaintiff Deadline Nov. 13
A securities class action against Baidu, Inc. (NASDAQ: BIDU) alleges the company overstated the ability of its AI business to offset a rapid decline in its legacy marketing business. Law firms say the deadline to seek lead plaintiff appointment is November 13, 2026.
- A securities class action against Baidu (NASDAQ: BIDU) covers purchases between November 18, 2025 and August 17, 2026.
- The complaint alleges Baidu overstated the ability of its AI business to offset the decline in its legacy marketing business.
- Levi & Korsinsky says Core AI-powered Business revenue fell 8% quarter over quarter to RMB 12.5 billion in the second quarter of 2026.
- BIDU ADSs closed at $90.87 on August 18, 2026, down 12.73% in one session, according to Levi & Korsinsky.
- The lead plaintiff deadline is November 13, 2026.
What the lawsuit alleges
According to law firm press releases, the complaint covers shareholders who bought BIDU securities between November 18, 2025 and August 17, 2026. It alleges violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5.
Schall, Brown & Schwartz LLP (SBS) states that, according to the complaint, Baidu made false and misleading statements to the market. The complaint says the company overstated the capacity of its AI business to cover the fast decline of its legacy marketing business, and that Baidu was likely to suffer a decline in revenue. On that basis, the complaint says, the company's public statements were false and materially misleading throughout the class period.
Levi & Korsinsky, LLP, which also issued a reminder, says the complaint alleges that positive statements about Baidu's revenue prospects lacked a reasonable basis and that revenue was reasonably likely to decline. Its notice covers purchasers of Baidu securities, including call options.
The numbers cited by plaintiffs' lawyers
Levi & Korsinsky lays out a comparison between what it calls the promise and the reality. For three consecutive quarters, it says, Baidu projected that its AI-powered business was absorbing the decline in legacy search advertising.
- Third quarter of 2025: AI-powered revenue of roughly RMB 10 billion, up more than 50% year over year.
- Fourth quarter of 2025: RMB 11.3 billion.
- First quarter of 2026: more than RMB 13.6 billion, described as exceeding half of Baidu General Business revenue for the first time. The firm puts year-over-year growth at 49%.
- Second quarter of 2026: the Core AI-powered Business fell 8% quarter over quarter to RMB 12.5 billion, with year-over-year growth slowing to 25%.
The firm also says AI Cloud Infra, which it calls the largest AI component, fell 17% quarter over quarter from RMB 8.8 billion to RMB 7.3 billion in the second quarter. It adds that legacy revenue kept deteriorating.
Share price reaction
Levi & Korsinsky reports that BIDU American Depositary Shares closed at $90.87 on August 18, 2026. That was a one-session decline of $13.25 per ADS, or 12.73%, on unusually heavy trading volume. The close was $71.65 below the class period high of $162.52, reached on January 22, 2026.
What investors should know
The deadline to move for lead plaintiff is November 13, 2026. SBS says appointment as lead plaintiff is not required to take part in any recovery. It also notes that the class has not yet been certified, and until certification occurs, shareholders are not represented by an attorney. Those who take no action can remain absent class members.
The allegations come from a complaint and from law firm marketing materials, which may be considered attorney advertising. They have not been proven in court, and the releases do not include a response from Baidu.
