OSTIN LAWSUIT ALERT: Class Action Filed by Bragar Eagel & Squire, P.C.

February 24, 2026

The law firm of Bragar Eagel & Squire, P.C. has recently filed a class-action lawsuit against Ostin Technology Group Co., Ltd. (“Ostin”) on behalf of investors who suffered losses between May 11, 2025, and June 26, 2025. The lawsuit, filed in the United States District Court for the Southern District of New York, alleges that Ostin’s co-Chief Executive Officer, Lai Kui Sen, and financial advisor, Yan Zhao, engaged in a scheme that resulted in over $110 million in illicit proceeds.

The complaint outlines that Lai Kui Sen and his accomplices executed a series of fraudulent securities offerings, aiming to transfer the majority of Ostin shares to co-conspirators at minimal costs. These offerings were coordinated with a deceptive promotional campaign to artificially boost Ostin’s stock value through various social media and messaging platforms. The lawsuit claims that the fraudulent campaign inflated Ostin’s market capitalization from about $22 million to over $1 billion, resulting in a peak stock price of $9.40 on June 26, 2025.

Yan Zhao and Lai Kui Sen facilitated the creation of brokerage accounts for co-conspirators to hold millions of OST shares acquired through these questionable securities offerings. However, on June 26, 2025, investors experienced significant losses when the market cap of Ostin plummeted by over 94%, with the stock dropping from an intraday high of $9.40 to a closing price of $0.55, wiping out approximately $950 million in market value in a single day.

Investors who purchased or acquired Ostin securities during the specified period are encouraged to reach out to Bragar Eagel & Squire Litigation Partner Brandon Walker to discuss their legal options. The deadline for investors to apply to be appointed as the lead plaintiff in the lawsuit is April 17, 2026.

These legal proceedings aim to hold Ostin accountable for the alleged fraudulent scheme orchestrated by its executives and to seek compensation for investors who suffered losses due to the company’s actions. If you are an investor who faced financial losses due to Ostin’s misconduct, have information, or want to explore your legal rights in this case, contact Bragar Eagel & Squire for more information regarding the class-action lawsuit.