A foreign fund owns 4.8% of a Korean listed company and notices that the issuer sells a large portion of its output to an affiliate controlled by the same founding family. The margins look thin, the disclosure is difficult to reconcile, and the company has never explained why the pricing is fair to minority shareholders. This is where Korea related-party transactions become more than an accounting footnote: they become a governance, valuation, and engagement issue.

For many international investors, related-party transactions are familiar from US, UK, and EU corporate governance frameworks. Korea has its own legal architecture, shaped by listed-company rules, board approval requirements, Fair Trade Commission oversight of large business groups, DART disclosures, and minority shareholder remedies under the Korean Commercial Act. The rules are not designed only for hostile activism. They are also practical tools for stewardship teams that want to ask better questions before voting, engaging, or escalating.

This guide explains how Korea related-party transactions should be reviewed by foreign institutional investors in 2026, how board approval and disclosure rules work, and how shareholders can turn concerns about self-dealing into an orderly engagement plan.

Korea Related-Party Transactions and Why They Matter

Related-party transactions are transactions between a company and persons or entities connected to it, such as directors, controlling shareholders, affiliates, family-owned private companies, or group companies. In Korea, this issue is especially important because many listed companies operate within broader corporate groups. A listed operating company may buy services from an affiliate, sell products to another group company, lease real estate from a related entity, guarantee obligations, or participate in asset transfers within the group.

Not every related-party transaction is improper. Group purchasing, shared services, distribution agreements, and intra-group technology support can be commercially sensible. The legal and investment question is whether the transaction is approved through a fair process, priced on arm's-length terms, disclosed with enough detail, and monitored by directors who understand their duties to the company and shareholders.

The valuation impact can be substantial. If profits are shifted away from a listed company through low-margin affiliate sales or excessive service fees, minority shareholders may receive lower dividends and weaker return on equity. If assets are transferred to a related party at a questionable price, the market may apply a governance discount even before any formal legal claim is filed.

Foreign investors should also understand the Korean market context. Korea's so-called Korea discount has often been linked to concerns about capital allocation, treasury shares, board independence, succession planning, and transactions within large business groups. Related-party transaction review is therefore not a narrow compliance exercise. It is part of the broader shareholder value conversation.

Korea Related-Party Transactions Under the Commercial Act

The starting point is the Korean Commercial Act. Article 398, titled transactions between a director and the company, requires board approval for transactions involving a director or certain persons closely connected to a director. The rule is aimed at self-dealing risk: a director should not be able to place personal or related interests ahead of the company's interests without proper oversight.

Article 398 is important because it focuses attention on process. A board should identify the relationship, review material terms, consider whether the transaction is fair, and approve the transaction through the required corporate procedure. For a foreign investor, the question is not only whether the company says the transaction is legal. The better question is whether the board materials, minutes, independent director involvement, and disclosure record show a genuine review.

For listed companies, Article 542-9 of the Commercial Act adds special restrictions on transactions with major shareholders and related persons. In simplified terms, the rule limits certain credit extensions, asset transfers, guarantees, and other transactions that could improperly benefit major shareholders or specially related persons. It also reflects the policy concern that listed companies should not be used as private financing tools for controllers.

Directors also owe duties under the Commercial Act. Article 382-3 imposes a duty of loyalty on directors, requiring them to perform their duties faithfully for the company in accordance with law and the articles of incorporation. Article 399 provides that directors may be liable to the company for damages if they violate laws, the articles, or neglect their duties. Article 401 may also support liability to third parties in serious cases involving bad faith or gross negligence.

These provisions matter for engagement because they give investors a legal vocabulary. A stewardship letter can ask how the board satisfied Article 398, how the company assessed Article 542-9 issues, and how directors considered their duty of loyalty under Article 382-3. That is more effective than simply accusing the company of poor governance.

Board Approval Is Not a Rubber Stamp

Board approval should be more than a short resolution. A well-governed Korean listed company should be able to explain who the counterparty is, how the price was determined, whether alternatives were considered, whether conflicted directors abstained, whether independent directors reviewed the transaction, and whether external valuation or benchmarking was used.

Foreign investors can compare this with the US concept of audit committee review of related-party transactions or the UK focus on conflicts, independent board judgment, and shareholder protection. Korea's rules are different in detail, but the governance question is similar: was the transaction reviewed by decision-makers who could act independently and had enough information to protect the company?

If a company cannot answer that question clearly, the investor may have a legitimate basis to seek additional disclosure, vote against directors, request inspection of records, or consider a formal shareholder proposal.

Disclosure: DART, Business Reports, and Fair Trade Rules

Korean listed companies disclose periodic reports and material information through DART, the electronic disclosure system operated by the Financial Supervisory Service. Foreign investors reviewing Korea related-party transactions should read annual reports, quarterly reports, major management matters, board-related disclosures, and notes to financial statements. The accounting notes may identify related parties, transaction amounts, receivables, payables, loans, guarantees, and commitments.

The Capital Markets Act framework is also relevant. Article 159 of the Financial Investment Services and Capital Markets Act requires listed companies and other covered issuers to submit business reports. Article 161 governs reports on major matters. These disclosures are the starting point for market transparency, although the level of narrative explanation may vary significantly by company.

Large business groups can face additional disclosure expectations under the Monopoly Regulation and Fair Trade Act, commonly called the Fair Trade Act. The Korea Fair Trade Commission monitors large business groups, including disclosures concerning group structure, executives and directors, shareholdings, circular shareholding, and transactions with related parties. For investors analyzing chaebol-linked issuers, these materials can be useful because they show the broader group context rather than only the listed company's standalone filings.

The problem is that disclosure may be fragmented. A DART filing may show aggregate sales to affiliates, a note to financial statements may show receivables, and Fair Trade Commission materials may show group relationships. A foreign fund should not rely on a single table. It should build a transaction map that connects counterparties, controllers, transaction type, pricing basis, approval process, and economic impact.

What Investors Should Look For in DART Filings

A practical review should focus on patterns, not isolated numbers. Investors should look for recurring affiliate transactions that represent a high percentage of sales, purchases, receivables, or profits. They should also identify sudden changes before restructurings, succession events, spin-offs, or asset sales.

Common red flags include repeated low-margin sales to affiliates, management service fees without clear scope, loans or guarantees to related parties, asset disposals near book value when market value appears higher, and receivables that remain outstanding longer than ordinary trade terms. Another warning sign is a lack of explanation when the company has already received investor questions on the same issue.

Foreign investors should be careful, however, not to overstate accounting data. Related-party transactions may be disclosed under accounting standards even when they are ordinary and commercially justified. The goal is to identify governance questions that require explanation, not to assume wrongdoing from disclosure alone.

Shareholder Rights and Engagement Tools

Once concerns are identified, the next step is to choose the right engagement tool. A private request for explanation is often the best first move. The investor can ask the company to explain transaction rationale, pricing methodology, board approval, conflict management, and whether an independent review was obtained. The request should be precise enough for management to answer and professional enough to preserve dialogue.

If the company does not respond, shareholders may consider formal rights under the Commercial Act. Article 466 gives qualifying shareholders the right to inspect accounting books and related documents in certain circumstances. Article 363-2 allows qualifying shareholders to submit shareholder proposals. Article 366 provides a right to request convocation of a general meeting. Article 403 allows a shareholder derivative action on behalf of the company when directors' conduct harms the company and procedural requirements are met.

These tools should be sequenced carefully. A fund that holds 5% or more must also consider Article 147 of the Capital Markets Act, Korea's large shareholding disclosure rule. If engagement moves from routine stewardship into efforts that may influence management, the fund should review whether its purpose-of-holding classification remains accurate. Coordinated action with other funds, securities lending, swaps, omnibus accounts, and voting authority can all complicate the analysis.

Voting is another powerful tool. If a board repeatedly approves opaque related-party transactions, investors can vote against directors, audit committee members, or relevant agenda items. Korea's AGM process is becoming more transparent, and foreign investors are increasingly expected to connect governance concerns with voting behavior.

A Hypothetical Engagement Roadmap

Assume a foreign asset manager holds 3.2% of a Korean manufacturer. The manufacturer sells components to a private affiliate controlled by the founder's family. The affiliate then sells finished products overseas at higher margins. The listed company says this is efficient group distribution, but the public filings provide little detail.

The investor's first step could be a private letter asking for the commercial rationale, transfer pricing policy, board approval date, identity of approving directors, role of independent directors, and whether comparable third-party pricing was reviewed. The letter can reference Article 398 and Article 542-9 of the Commercial Act without making inflammatory accusations.

If the response is weak, the investor could request a meeting with investor relations and the board committee responsible for governance. It could also ask the company to add a related-party transaction policy to its corporate governance report, disclose approval thresholds, and commit to periodic independent benchmarking.

If the company still refuses to engage, escalation may include voting against directors, submitting a shareholder proposal for enhanced disclosure, seeking inspection rights under Article 466, or considering a derivative action under Article 403 where legal requirements and evidence support that step. Each escalation should be documented internally so the fund can show that it acted reasonably and consistently.

Practical Tips for Foreign Investors

Start with a transaction map. Identify the counterparty, ownership chain, transaction type, value, pricing basis, and board approval record before sending an engagement letter.
Use Korean legal terms precisely. References to Commercial Act Articles 398, 542-9, 382-3, 399, 403, and 466 can make the request concrete and credible.
Separate accounting disclosure from legal conclusions. A related-party note is a clue, not proof of misconduct.
Check DART and group-level materials. Business reports, notes to financial statements, governance reports, and Fair Trade Commission disclosures may each show different parts of the picture.
Watch the 5% rule. If the investor or group crosses 5%, Article 147 of the Capital Markets Act and purpose-of-holding classification should be reviewed before escalation.
Link voting to engagement. If the company refuses to explain material transactions, consider whether director, audit committee, or governance-related votes should reflect that concern.
Preserve privilege and evidence. Internal analysis, meeting notes, board responses, and transaction timelines can become important if inspection rights or derivative litigation are later considered.

Key Takeaways on Korea Related-Party Transactions

Korea related-party transactions require both legal and investment analysis. The key legal framework includes the Commercial Act's conflict-of-interest and director duty provisions, the Capital Markets Act disclosure system, and Fair Trade Commission oversight of large business groups. The key investment question is whether the listed company is being run for all shareholders or whether value is being shifted through opaque group arrangements.

Foreign investors do not need to begin with confrontation. A disciplined process usually starts with DART review, transaction mapping, and a focused request for explanation. If the company provides a reasonable answer, engagement can improve disclosure and governance without escalation. If it does not, Korean law offers formal tools such as shareholder proposals, inspection rights, voting opposition, and derivative actions.

For funds, stewardship teams, and institutional investors, the most effective approach is structured and evidence-based. Korea Business Hub assists foreign investors with DART review, Korean Commercial Act analysis, shareholder engagement strategy, and escalation planning where related-party transactions raise governance or minority shareholder concerns.

Korea Related-Party Transactions: Investor Guide 2026