What Is a Chaebol? How Korea's Business Groups Work

Korea's competition regulator named 102 business groups with assets of ₩5 trillion ($3.7 billion) or more on April 29, 2026, and placed 3,538 companies under its rules for large groups from May 1. Most of these groups are what the world calls chaebol: family-controlled conglomerates that span many industries under one name.

The list matters to anyone who owns Korean shares. Many of the largest listed companies belong to these groups, and the rules that come with designation decide how group companies may own each other, guarantee each other's debts and disclose deals among themselves.

The groups are also bigger than ever. The 102 designated groups held ₩3,669.5 trillion in assets for 2026, up from ₩3,301.8 trillion a year earlier, according to the Korea Fair Trade Commission's (KFTC) designation tables.

Won figures in this article are converted at ₩1,356.6 per dollar, the Seoul 3:30 p.m. rate on Nov. 6, 2026, reported by the Korea Herald. Here's what you need to know.

What Is a Chaebol?

A chaebol is a group of legally separate companies that one person or family steers as a single business. Korean law does not use the word. It speaks of a "business group," which the KFTC's English guide describes as "a group of companies whose operations are under the de facto control of the same person."

That person is called the dongilin, or "same person," in Korean law. In most groups it is the founding family's leader, known in Korea as the chongsu, or group head. A company can also be named, as with POSCO Holdings for the POSCO group and KT Corp. for the KT group.

Simply put, the label follows control, not a single stock listing. Samsung Electronics, Samsung C&T and Samsung Life Insurance trade as separate companies, but the KFTC counts them, with 64 other affiliates, as one group under Lee Jae-yong.

How Does the Fair Trade Commission Designate Large Business Groups?

The KFTC designates groups every year by total assets, in two tiers. Groups with ₩5 trillion or more become business groups subject to disclosure. Those with assets of at least 0.5% of Korea's latest confirmed nominal gross domestic product become business groups subject to limits on cross-shareholding.

For 2026, that GDP figure was ₩2,408.7 trillion, so the second cut-off came to ₩12 trillion ($8.8 billion). Forty-seven groups with 2,088 companies cleared it, one more group than in 2025, the KFTC said on April 29, 2026.

Eleven groups joined the list for the first time, including Kolmar Korea, Orion and Toss. The KFTC tied several of the new entries to overseas demand for Korean cosmetics and snacks and to a stock market boom that began in 2025. Youngone dropped out after its assets fell below ₩5 trillion.

The two tiers carry different duties. All 102 groups must disclose large internal deals and group information, and their founding families may not receive unfair benefits from group companies. The 47 larger groups also face bans on cross-shareholding and new circular shareholding, limits on debt guarantees between affiliates, and caps on the votes their financial and insurance companies may cast.

The top of the ranking changed in 2026. Hanwha rose from seventh to fifth, which the KFTC linked to higher demand for its defense companies, pushing Lotte and POSCO down one place each.

The figures are the asset totals the KFTC uses for designation, published in an attachment to its April 29, 2026, release. They differ from the consolidated balance sheets the companies report. By that measure, Samsung's assets grew 18%, SK's 16% and Hanwha's 19% in a year, while Lotte's fell slightly.

The top five groups together held about 48% of the assets of all 102 groups, by our calculation from the same table.

How Do Founding Families Control Groups With Small Stakes?

They rely on group companies owning one another. In the 89 groups with a family head, the head and relatives directly owned an average of 3.5% of group companies' shares in 2026, while other group companies owned 55.5%, the KFTC said on Sept. 3, 2026.

Adding related parties such as nonprofit foundations and executives, insiders held 61.4%. The KFTC said the gap showed that "the divergence between ownership and control remains at a considerable level" (translated from Korean).

Two structures do most of the work. In circular shareholding, the KFTC's English guide describes "cross-shareholding by three or more companies making circle shaped investments": company A owns B, B owns C, and C owns A. A family that controls one link can steer the whole loop.

Hyundai Motor Group is a well-known example. The KFTC counted four circular shareholding loops in the group in 2026, unchanged from 2025. Across all designated groups, the number of loops fell to 233 from 1,435, mostly because the Sajo group cut its loops from 1,426 to 220.

The core loop runs from Hyundai Mobis to Hyundai Motor, which controls Kia, and back to Mobis, the Korea Herald reported on March 9, 2026. Mobis owns about 22.4% of Hyundai Motor and acts as the group's de facto holding company, while Chairman Chung Eui-sun holds 0.3% of Mobis and his father, Honorary Chairman Chung Mong-koo, holds 7.29%.

The second structure is the holding company, a company whose main business is owning shares in subsidiaries. Under the KFTC's rules, a holding company needs at least ₩500 billion in assets and must own at least 30% of each listed subsidiary and 50% of each unlisted one.

Simply put, control stacks up through the chain. In a hypothetical case, a family with 30% of a holding company that owns 30% of a listed subsidiary has an economic claim on 9% of that subsidiary but decides how the holding company's whole 30% stake is voted.

Holding companies are now common. At the end of 2025, Korea had 173 of them, and 51 of the 102 designated groups had at least one, the KFTC said on June 24, 2026. General holding companies owned an average of 42.0% of their listed subsidiaries and 87.0% of their unlisted ones.

Samsung got its first holding company in that period, when the biosimilar business of Samsung Biologics was split off under a new holding company, Samsung Episholdings. The KFTC described the holding company system as one whose "transparent structure" is its advantage (translated from Korean).

Why Do Chaebol Structures Matter to Minority Shareholders?

They matter because the family's votes and the family's money are not the same size. When a family directly owns a few percent of a listed company but controls it through affiliates, decisions on mergers, internal deals and payouts can affect outside shareholders differently from the family.

The law targets the most direct risk. Under Article 47 of the Fair Trade Act, group companies may not give unfair benefits to the family. In 2026, 1,047 companies, or 31.8% of companies in groups with a family head, fell under that rule because the family owned at least 20% of them, or because such a company owned more than 50%, the KFTC said.

Treasury shares, stock a company has bought back from the market, are another focus. Among listed group companies in which families hold shares, treasury stock made up 24.6% of SK Inc., 24.4% of Taekwang Industrial and 23.6% of Lotte Corp., the KFTC said on Sept. 3, 2026.

Investors and researchers often cite these structures, along with holding company discounts and duplicate listings, as part of the "Korea discount." Our guide to the Korea discount explains that debate, and our explainer on the Commercial Act amendments covers the new duties directors owe to all shareholders.

What Rules Changed in 2025 and 2026?

Several rules changed, from who counts as a group's controller to how buybacks are handled. The main changes, with dates from KFTC releases:

• Corporate controllers, from May 2024: An amended enforcement decree let the KFTC name a company, not a person, as the controller of a group if the family takes no part in management. On April 29, 2026, the KFTC said Coupang no longer met that test because founder Bom Kim's younger brother takes part in running group companies, and it named Kim as the controller. Dunamu kept its corporate designation.
• Treasury share cancellation, from March 2026: A Commercial Act amendment requires companies to cancel shares they buy back within one year, unless shareholders approve a plan to keep or sell them.
• Wider buyback disclosure, from June 2026: Revised capital market rules require every listed company that holds treasury shares to disclose its holdings and disposal plans.
• Proposed decree changes, from July 23, 2026: The KFTC proposed closing routes around existing bans, including venture capital units investing through outside funds and debt guarantees routed through special purpose companies. Public comment ran until Sept. 1, 2026.
• Tougher disclosure fines, from Nov. 9, 2026: Fines for groups that break disclosure rules rise by 10% for one repeat violation, 30% for two and 50% for three or more, and discounts for late filing were removed.

The Coupang decision drew the most attention. "Changing the group owner designation is a legitimate enforcement of the law," a KFTC official said, according to the Asia Business Daily. The KFTC said the move aligned the person who controls the group with the person legally responsible for it, ending a gap "between authority and responsibility" (translated from Korean).

What Should Investors Watch Next?

The KFTC publishes its data on the groups in stages through the year. After the ownership figures in September, it planned to release internal transaction data in November and holding company and governance reports in December 2026, according to its Sept. 3 release.

The next annual designation will again set the higher cut-off at 0.5% of the latest confirmed GDP figure. Groups near either line are the ones whose duties can change, as Kyobo Life Insurance and Daou Kiwoom did when they moved into the stricter tier for 2026.

Together, the annual list, the ownership rules and the newer Commercial Act duties shape how far a Korean family can steer a group with a small direct stake, and how much outside shareholders can see of it.