SEOUL, September 29 (AJP) —South Korean financial authorities said Tuesday they had uncovered a suspected insider-trading ring whose members used elite university and consulting-firm connections to share confidential deal information and pocket more than 20 billion won ($14 million) with family members and acquaintances.
The alleged scheme turned relationships formed in a university business club and at a global consulting firm into what regulators called an “information cartel," according to the Financial Supervisory Service (FSS). The cartel is said to have been composed of graduates of Seoul National University.
As members moved into private equity firms and listed companies, their work on mergers, acquisitions and tender offers gave them access to market-sensitive information before ordinary investors could see it.
The core suspects repeatedly exchanged those tips over about five years, trading on the information themselves and passing it to relatives and acquaintances, the FSS said.
Their method was straightforward profiteering - buying shares before favorable deal announcements and selling at higher prices after the news reached the market.
A joint task force comprising the Financial Services Commission (FSC), Financial Supervisory Service (FSS) and Korea Exchange (KRX) searched about 20 residences and workplaces Tuesday to gather evidence.
The Securities and Futures Commission also froze withdrawals from securities accounts belonging to some suspects to prevent the alleged proceeds from being moved or concealed.
Authorities said the network’s information came from professionals working on M&A transactions who were bound by strict confidentiality obligations.
Their access extended to tender offers and other changes in corporate ownership or control — developments that can send share prices sharply higher once announced.
By sharing information across their professional network, the suspects allegedly allowed one member’s access to a confidential transaction to become a trading opportunity for others. Passing those tips to family members and acquaintances widened the circle of people benefiting from the information.
Regulators described the case as more serious than an isolated breach by an individual because the exchanges were repeated, organized and sustained over several years.
AJP Takeaways
- South Korean financial authorities searched more than 20 residences and offices on September 29, 2026, after uncovering suspected use of confidential merger and acquisition information that generated more than 20 billion won ($14 million) in improper gains over about five years.
- A joint task force including the Financial Services Commission, Financial Supervisory Service and Korea Exchange said roughly five core suspects shared nonpublic information involving five stocks and also passed information to family members and acquaintances before it was disclosed to the market.
- The investigation focuses on private equity and listed-company executives who allegedly obtained confidential information through M&A work rather than as direct insiders of the companies involved, making the trading harder to detect than a typical insider-trading case.
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