Baidu, Inc. Class Action Lawsuit - BIDU

The filed complaint alleges that Baidu, Inc made materially false and/or misleading statements and/or failed to disclose that: (1) the Company had overstated the ability of its AI business to mitigate rapid declines in its legacy online marketing business; (2) as a result, the Company’s revenue was reasonably likely to decline; and (3) as a result of the foregoing, defendants’ positive statements about the Company’s business, operations, and prospects were materially misleading and/or lacked a reasonable basis.

Investors who purchased or otherwise acquired Baidu, Inc. securities within the class period described above and suffered losses may be eligible.

If you suffered a loss in Baidu, Inc. during the relevant time frame or pursuant to the relevant offering(s), you have until November 13, 2026 to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn't require that you serve as a lead plaintiff.

Key Facts About Baidu, Inc. (NASDAQ: BIDU)

●       The Allegation: The complaint alleges that Baidu overstated the ability of its new AI-powered business to offset rapid declines in its legacy online marketing business, while publicly assuring investors that AI growth had meaningfully mitigated, and would continue to mitigate, those declines.

●       The Stock Drop: On August 18, 2026, Baidu ADS fell $13.25 per share, or 12.73%, to close at $90.87 per share after the company reported second quarter 2026 results showing decelerating AI-powered business growth and steep legacy revenue declines; earlier, on February 26, 2026, the ADS fell $7.50 per share, or 5.65%, to close at $125.15 per share after the company reported fourth quarter and full year 2025 results revealing year-over-year revenue declines.

●       Class Period & Defendants: The class period runs from November 18, 2025 through August 17, 2026, inclusive. The named defendants are Baidu, Inc., Robin Yanhong Li (Chief Executive Officer), and Haijian He (Chief Financial Officer).

●       Lead Plaintiff Deadline: November 13, 2026. Investors who wish to seek appointment as lead plaintiff must apply by the deadline.

Baidu Class Action Summary
Company	Baidu, Inc. (NASDAQ: BIDU)
Lead Plaintiff Deadline	November 13, 2026
Class Period	November 18, 2025 – August 17, 2026
Stock Drop	February 26, 2026 – BIDU fell $7.50 (5.65%) to $125.15; August 18, 2026 – BIDU fell $13.25 (12.73%) to $90.87

Introduction

A securities class action lawsuit has been filed against Baidu, Inc. (NASDAQ: BIDU). The case was brought by plaintiff Rosewood Funeral Home Inc. on behalf of investors who purchased or acquired Baidu securities. The class period runs from November 18, 2025 through August 17, 2026.

The complaint alleges that Baidu made materially false and misleading statements about its business. It claims the company overstated how much its new AI-powered business could offset falling legacy online marketing revenue. According to the complaint, Baidu overstated the ability of its AI business to mitigate the legacy decline, while the company’s revenue was reasonably likely to decline.

When the alleged problems surfaced, Baidu's stock price fell sharply. On February 26, 2026, the ADS dropped 5.65% after fourth quarter results. On August 18, 2026, the ADS fell 12.73% after weaker second quarter results, leaving investors with significant losses.

Company Profile

Baidu, Inc. is a Chinese technology company that operates the most popular internet search engine in China. Its core legacy business is Online Marketing Services, which represented approximately 53.1% of total revenues for the third quarter of 2025. Baidu is incorporated in the Cayman Islands with principal executive offices in Beijing, and its American Depositary Shares trade on the NASDAQ under the symbol BIDU, with each ADS representing eight Class A ordinary shares.

Class Period

November 18, 2025–August 17, 2026

Investors who purchased or acquired Baidu, Inc. (BIDU) securities during the Class Period may be eligible to seek recovery under the federal securities laws.

Allegations

The complaint centers on Baidu's public messaging about its transition from a declining legacy advertising business to a new AI-powered business. Online Marketing Services, Baidu's core legacy business, had been falling steeply, dropping 17.6% year over year in the third quarter of 2025 on a consolidated basis. Against that backdrop, the lawsuit alleges, defendants repeatedly assured investors that Core AI-powered Business growth had, and would continue to, meaningfully mitigate the legacy decline.

The class period begins on November 18, 2025, when Baidu announced third quarter results. According to the complaint, the accompanying press release touted the company's results and represented that legacy revenue declines were being cushioned by the AI business. CFO Haijian He stated that AI Cloud achieved healthy expansion that cushioned the impact from softness in online marketing, and that revenue from AI-powered businesses grew over 50% year over year to roughly RMB10 billion. CEO Robin Li described AI's transformative value across the company's portfolio.

The complaint alleges these statements were materially false and misleading because defendants failed to disclose that the company had overstated the ability of its AI business to mitigate the rapid declines in its legacy online marketing business, that as a result the company's revenue was reasonably likely to decline, and that defendants' positive statements about the business lacked a reasonable basis. The lawsuit points to Baidu's FY25 Form 20-F, filed March 17, 2026, which stated the company was not aware of any trends or events reasonably likely to have a material adverse effect on total revenue, an assurance the complaint alleges was misleading given the deterioration underway.

The lawsuit claims the Individual Defendants, by virtue of their senior positions and access to internal reports and data, knew or recklessly disregarded that these representations were false when made, and had the ability to prevent or correct the statements issued to the investing public.

The Truth Emerges

The truth began to partially emerge on February 26, 2026, before the market opened, when Baidu reported fourth quarter and full year 2025 results. According to the complaint, total revenue fell more than 4% year over year for the fourth quarter to RMB32.74 billion (or $4.68 billion) and more than 3% year over year for the full year to RMB129.079 billion (or $18.458 billion). The lawsuit notes that although management continued to emphasize AI-powered growth, the reported figures revealed the pressure on total revenue that the prior optimistic messaging had downplayed.

The full extent of the alleged problem, the complaint claims, became clear on August 18, 2026, when Baidu reported second quarter 2026 results before the market opened. Baidu General Business revenue fell 4% year over year to RMB25.2 billion (or $3.71 billion), with Legacy Business revenue falling 23% year over year to RMB10.4 billion and total Online Marketing Services revenue falling 19% year over year to RMB13.1 billion. Critically, according to the complaint, the Baidu Core AI-powered business itself fell 8% quarter over quarter to RMB12.5 billion (or $1.86 billion), with year-over-year growth decelerating from 49% in the first quarter of 2026 to 25%, and its largest component, AI Cloud Infra, falling 17% quarter over quarter from RMB8.8 billion to RMB7.3 billion.

These disclosures, the lawsuit alleges, undermined the company's prior assurances that AI growth was meaningfully mitigating the legacy decline, showing that the AI-powered business had fallen 8% quarter over quarter even as legacy revenue continued to fall.

Market Reaction

The complaint alleges Baidu's stock reacted sharply to each disclosure. On February 26, 2026, following the fourth quarter and full year 2025 results, the price of Baidu ADS fell $7.50 per share, or 5.65%, to close at $125.15 per share on unusually heavy trading volume. The class period high had reached $162.52 per share on January 22, 2026.

Then, on August 18, 2026, following the second quarter 2026 results, the price of Baidu ADS fell $13.25 per share, or 12.73%, to close at $90.87 per share, again on unusually heavy trading volume. According to the complaint, these declines reflected the market's reaction as the alleged truth about the AI business's ability to offset the legacy decline was revealed, causing significant losses for investors who purchased Baidu securities at artificially inflated prices during the class period.

Next Steps

●       Lead Plaintiff Deadline: November 13, 2026

●       After the lead plaintiff deadline, the Court will consider any lead plaintiff motions. 

●       Defendants may file a motion to dismiss.

●       If the case proceeds, the Court may later consider class certification.

Disclaimer: This shareholder alert is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for personalized guidance. Prior results do not guarantee similar outcomes.