---
title: "M&A Bankers Discover a Faster Way to Learn the Deal News: Each Other"
description: "Korean regulators raid an ‘information cartel’ of Seoul National University business-club friends accused of trading on M&A secrets"
author: "Nate Ledger"
published: 2026-09-29T01:51:42.532Z
modified: 2026-09-29T06:25:49Z
url: https://rews.cc/a/m-a-bankers-discover-a-faster-way-to-learn-the-deal-news-eac-f36190
language: en
tags: ["insider-trading", "m-a", "seoul-nationals-university", "regulation", "business"]
publisher: "Rews (https://rews.cc)"
---

# M&A Bankers Discover a Faster Way to Learn the Deal News: Each Other

*Korean regulators raid an ‘information cartel’ of Seoul National University business-club friends accused of trading on M&A secrets*

By Nate Ledger · September 29, 2026 · https://rews.cc/a/m-a-bankers-discover-a-faster-way-to-learn-the-deal-news-eac-f36190

## In brief

- Korean financial authorities raided about 20 locations and froze some suspects’ accounts in an insider-trading probe
- Suspects met in an SNU business club, worked at a global consulting firm, then moved to private equity and listed companies in M&A roles
- Authorities suspect undisclosed information on five listed companies was used in at least five to six trades over five years
- Alleged illicit gains exceed 20 billion won; officials say suspects’ current employers were not involved
- Regulators are weighing criminal complaints and surcharges of up to twice the alleged gains; the case has not gone to trial

The rules of insider trading are well known. Rule one: don’t do it. Rule two: if you are going to do it anyway, do not — and this really seems like it should go without saying — organize it as a long-running subscription service among your college friends, with a family-and-acquaintances distribution tier. Rule two appears to have been the sticking point. A joint task force of Korea’s Financial Services Commission, Financial Supervisory Service and Korea Exchange said it raided about 20 homes and offices on the 29th in an investigation into what officials describe as an “information cartel”: finance professionals who bonded in a Seoul National University business club and are suspected of sharing undisclosed merger-and-acquisition information to book more than 20 billion won in illicit profits. Payment was also suspended on some suspects’ securities accounts to keep the suspected profits from wandering off.

The alleged mechanics have a grim tidiness. Five or so people in their 30s and 40s sit at the center. They met in the SNU club, worked together at a global consulting firm, then fanned out into private equity firms and listed companies, where as executives they handled M&A work including tender offers. Life at the center of deal flow is a life spent knowing things before other people know them; being on an M&A team is in some sense a professional obligation to possess secrets. According to the authorities, over the past five years the group exchanged undisclosed information about five listed companies and used it to trade on at least five or six occasions — buying shares before the market knew a deal was coming, selling after the announcement moved the price. They are also accused of passing tips on to family members and friends, who traded too, which is both the obvious way a scheme like this grows and precisely how it gets found.

What makes the case stand out to regulators is not any single trade but the structure. This was not, they say, one person’s one-off lapse but a durable arrangement: professionals staffed on M&A work — people under strict confidentiality duties, forming the actual origin of the information — sharing it among themselves for years. Officials emphasized as well that the suspects’ current employers are not believed to be involved, which is either reassuring or a statement about how portable this kind of alleged scheme is. Once the tips spread to relatives and acquaintances, the circle of people who traded on undisclosed information widened considerably, the authorities believe.

The unravelling followed the standard path of market surveillance, which is worth a moment of appreciation because it is so unglamorous. FSS and exchange monitoring kept catching the same person’s anomalous trades, repeatedly. No single incident could show where the information leaked from, so investigators merged the cases and analyzed them together; a joint multi-agency probe has been running since May, and an official said the investigation in fact began two years ago, with painstaking fund-flow tracing, trade analysis and mapping of personal connections gradually confirming who knew whom. Now the raids will test whether the seized records and statements match the theory. “Through the search and seizure we will verify whether the evidence and the statements align,” the financial-authority official said.

When the investigation wraps, the authorities plan follow-up steps including criminal complaints, and they are weighing administrative surcharges of up to twice the illicit gains, as the Capital Markets Act allows. The regulators add the customary caveat: everything disclosed so far concerns allegations under investigation, not facts confirmed at trial. That is right and fair and will also be thin comfort to anyone who spent five years treating confidential deal information as a club benefit. The thing about an information cartel is that it has the classic cartel problem: every additional member who knows the secret is an additional subpoena waiting to happen.