Thousands of Investors Lose Millions in OST Fraud

Coordinated promotional campaign used fabricated endorsements and AI-generated deepfakes to lure victims

Published on Mar. 5, 2026

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Thousands of retail investors across six countries believed they had found a once-in-a-lifetime opportunity in Ostin Technology Group Co., Ltd. (Nasdaq: OST). However, the sentiment shifted from optimism to devastation as the $1 billion mirage collapsed, with OST plummeting 94.1% and destroying over $950 million in market capitalization in a single trading session on June 26, 2025.

Why it matters

This case highlights the growing threat of coordinated investment fraud schemes that exploit social media and emerging technologies to manipulate investor sentiment and lure victims. The OST fraud reached investors across multiple countries, resulting in devastating personal losses and shaking confidence in the integrity of financial markets.

The details

The lawsuit contends that beginning in May 2025, a coordinated promotional campaign used fabricated investment advisor identities, stolen credentials from SEC/FINRA-registered professionals, and sophisticated AI-generated deepfake videos to create an illusion of institutional endorsement. WhatsApp groups containing hundreds of members received daily instructions to buy and hold OST, while promoters posing as fellow investors touted their own purchases to generate artificial peer pressure. Fabricated acquisition rumors and promises of outsized returns further fueled the buying frenzy, despite OST's poor financial performance and lack of institutional investment.

  • On June 26, 2025, OST plummeted 94.1%, destroying over $950 million in market capitalization in a single trading session.
  • The lead plaintiff deadline for the securities class action is April 17, 2026.

The players

Ostin Technology Group Co., Ltd.

A Nasdaq-listed company that was the target of a coordinated investment fraud scheme that resulted in devastating losses for thousands of retail investors.

Joseph E. Levi, Esq.

An attorney at Levi & Korsinsky, LLP, a nationally recognized shareholder rights firm that has filed a securities class action on behalf of purchasers of OST ordinary shares.

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What they’re saying

“Investor confidence depends on receiving truthful information from the companies they invest in. When that confidence is built on fabricated endorsements and coordinated manipulation, the resulting harm can be catastrophic and deeply personal.”

— Joseph E. Levi, Attorney, Levi & Korsinsky, LLP

What’s next

The judge in the securities class action will decide on the lead plaintiff by April 17, 2026.

The takeaway

This case highlights the growing threat of sophisticated investment fraud schemes that leverage social media, AI, and other emerging technologies to manipulate investor sentiment and cause significant financial harm. It underscores the importance of verifying information and exercising caution when making investment decisions, especially in the face of promises of outsized returns.