South Korea has tightened its rules for initial public offerings, focusing on subsidiaries and prioritizing shareholder protection and corporate governance. The changes mark a significant shift in the country’s capital-market reform agenda.
These new regulations raise the bar for subsidiary IPOs. Previously viewed mainly as financing exercises, such decisions now place greater emphasis on governance. The government aims to address the long-standing “Korea Discount,” the tendency for Korean listed companies to trade at lower valuations than comparable firms elsewhere.
The move comes amid a strong rally in South Korea’s equity market. The KOSPI index broke through 5,000 in January 2026, a level President Lee Jae Myung had pledged to hit during his election campaign. The market has climbed further, boosted by the strength of the AI and semiconductor sectors, particularly Samsung Electronics and SK Hynix.
However, the government’s objective is broader than a stronger stock market. Lee has repeatedly identified the Korea Discount as a structural problem that capital-market reform should address. As of the end of 2025, listed parent companies’ equity stakes in their listed subsidiaries represented about 11.2 percent of South Korea’s total market capitalisation. This is far higher than in other major markets, such as the United States at 0.05 percent and Japan at 4 percent.
Stricter Requirements Take Effect
Against this backdrop, Seoul has moved quickly to impose stricter rules. The Financial Services Commission (FSC) approved the amendments on July 31. The new regime took effect on August 3, with no formal grace period.
The new rules impose particularly stringent requirements on subsidiaries created through split-offs. A key change is that shareholder consent is now treated as a de facto mandatory requirement for their IPOs. There is an exception for low-impact subsidiaries: those whose revenue, operating income, and total assets each account for less than 10 percent of the parent’s corresponding figures.
The scope of the rules extends beyond traditional split-offs. They also cover affiliates within the same corporate group under the Fair Trade Act that are in a “vertical control relationship.” The framework can also capture parent-subsidiary relationships established through M&A or greenfield investment, as well as indirect listing structures like special purpose acquisition company (SPAC) mergers.
A one-year look-back period limits the ability of companies to restructure their ownership shortly before a listing to avoid the new rules. “This is not a purely formalistic shareholding test but one aimed at capturing substantive control,” according to legal experts at Bae, Kim & Lee (BKL).
Under the new regime, a subsidiary IPO is no longer simply a matter for the subsidiary itself. It has evolved into a strategic corporate matter that the parent company’s board must independently review and resolve based on its fiduciary duty to shareholders. The parent board must now undertake five core duties, including evaluating the impact on shareholders and formulating protection measures.
Shareholder Protection Measures
These measures must be concrete and executable, with defined timing, methods, and conditions. The five core duties apply equally when a subsidiary lists on a foreign exchange, meaning an overseas IPO does not remove the parent’s obligations. Violations can result in fines up to 1 billion won, trading suspensions, surcharges, and penalty points for disclosure violations.
Impact on Market Participants
For private equity funds and strategic investors, the rules alter exit strategies. An IPO for a subsidiary is now a more difficult path to achieve. Companies have already begun adjusting their plans by consolidating corporate structures through subsidiary mergers.
