Co-Inherited Shares in South Korea: What If Other Heirs Refuse to Update the Shareholder Register?

1. What Happens to Shares When They Are Co-Inherited in South Korea?

Unlike bank deposits or cash, shares in South Korea are not automatically divided among heirs upon inheritance. In this ruling, the Supreme Court reaffirmed its established position: shares are not divisible claims like monetary debts. When shares are co-inherited, they do not automatically vest in each heir according to statutory inheritance portions. Instead, the co-heirs form a quasi-co-ownership (junkongyou) relationship over the shares.

What Is Quasi-Co-Ownership of Shares Under South Korean Law?

Quasi-co-ownership refers to a form of joint ownership that applies to property rights (here, the shareholder status represented by shares) held by multiple persons. Under Article 278 of the South Korean Civil Act, provisions governing co-ownership of tangible property apply by analogy. Therefore, when multiple heirs co-inherit shares, they become co-owners of those shares from the moment of the estate opening, regardless of whether a share transfer registration has been completed or whether an estate division proceeding has been finalized (Supreme Court Decision 2025Da211120, September 11, 2025).

This stands in contrast to monetary claims such as bank deposits. The Supreme Court has held that divisible claims like deposits are automatically divided among co-heirs according to statutory inheritance portions upon the opening of the estate. In a prior ruling, the Court also held that beneficial interests in MMFs (Money Market Funds) under South Korea’s Financial Investment Services and Capital Markets Act are divided among co-heirs by the number of units according to statutory inheritance portions (Supreme Court Decision 2023Da221144, December 21, 2023), while consistently maintaining the quasi-co-ownership doctrine for shares.

2. Can One Heir Unilaterally Request Share Transfer Registration?

The short answer is no. When other co-heirs refuse to cooperate, a single heir cannot unilaterally request co-ownership share transfer registration. The Supreme Court provided two grounds for this conclusion.

Freedom to Decide on Share Transfer Registration

First, a person who has acquired shares has the right to freely decide whether to seek share transfer registration or to dispose of the shares without registration (Supreme Court Decision 2009Da89665, October 14, 2010). Therefore, when one co-heir says “do not put my name on the shareholder register,” this is within that co-heir’s legitimate freedom of choice.

Requirement for All Co-Owners’ Information

Second, when shares are co-owned by multiple persons, the names and addresses of all co-owners must be recorded on the shareholder register (Article 352(1)(i), South Korean Commercial Act). This is because the shareholder register system was established to ensure uniform and stable processing of legal relationships between the company and its shareholders.

Combining these two grounds, the Supreme Court concluded that when some co-owners do not wish to have their names registered, the remaining co-owners cannot unilaterally request co-ownership share transfer registration. In this case, even though the plaintiff wished to proceed with registration independently, the other siblings (Defendants 2 and 3) clearly did not consent to the registration, so the co-ownership share transfer registration claim was rejected.

3. Is a Designated Rights Exerciser Required for Co-Ownership Registration?

On this issue, the Supreme Court pointed out that the lower court’s legal analysis contained an error. The appellate court had reasoned that co-ownership share transfer registration also required designation of a rights exerciser under Article 333(2) of the South Korean Commercial Act. The Supreme Court found this reasoning inappropriate.

Purpose of Article 333(2) of the South Korean Commercial Act

Article 333(2) of the Commercial Act provides that “when shares are co-owned by multiple persons, the co-owners must designate one person to exercise shareholder rights.” The Supreme Court explained that this provision is intended to prevent difficulties or disadvantages that may arise for the company in relation to the exercise of rights by co-owning shareholders, and to promote convenience in the company’s administrative processing.

Registration Requests Are Not an “Exercise of Shareholder Rights”

The Supreme Court held that requesting co-ownership share transfer registration is merely an act of establishing the requirements to assert the co-ownership relationship against the company for when a future rights exerciser exercises shareholder rights under Article 333(2). Permitting such registration would not cause any difficulty or disadvantage to the company. Therefore, it is not necessary to designate a single rights exerciser before requesting co-ownership share transfer registration.

This holding is of great practical significance. Previously, it was unclear whether rights exerciser designation was required even at the registration stage, which led to prolonged delays in share transfer registration when co-owners could not reach agreement. By clearly distinguishing between registration requests and the exercise of shareholder rights, the Supreme Court established that registration is possible without designating a rights exerciser, as long as all co-owners consent.

4. How Can Shareholder Status Be Confirmed When Registration Is Blocked?

The Supreme Court delivered its most critical holding on this point. When co-ownership share transfer registration is impossible, an individual co-owner may independently seek confirmation of shareholder status from the company with respect to their own co-ownership share.

General Rule: No Confirmatory Interest When Registration Is Available

The Supreme Court had previously held that a person who has acquired shares can generally request share transfer registration by proving their acquisition of the shares. Therefore, there is ordinarily no confirmatory interest in seeking a separate declaratory judgment confirming shareholder status against the company (Supreme Court Decision 2016Da240338, May 16, 2019).

Exception: Shareholder Status Confirmation When Registration Is Impossible

However, the Supreme Court recognized an exception in the unique context of co-inheritance. When some co-owners refuse registration, making it impossible to request co-ownership share transfer registration, the Court held that the remaining co-owners have a confirmatory interest in seeking shareholder status confirmation against the company.

There is an important limitation, however. A co-owner’s share is essentially equivalent to independent ownership, subject only to proportional limitations imposed by other co-owners’ shares. Each co-owner may assert their own share interest and seek confirmation thereof against third parties who deny it (Supreme Court Decision 94Da35008, November 11, 1994). Therefore, an individual co-heir may seek shareholder status confirmation only with respect to their own co-ownership share, not with respect to other co-owners’ shares or the entire block of shares.

Practical Value of Shareholder Status Confirmation Under South Korean Law

When a shareholder status confirmation lawsuit is granted, the heir obtains legal recognition as a co-ownership shareholder. This judgment has binding effect and serves as an important legal basis in estate division proceedings, future registration requests, and rights claims against third parties. However, since exercising specific shareholder rights such as voting and receiving dividends still requires share transfer registration, a confirmation judgment alone does not resolve all issues.

5. Can Shareholder Status Be Confirmed Against Other Heirs or Shareholders?

In this case, the plaintiff sought shareholder status confirmation not only against the company (Defendant 1) but also against co-heirs (Defendants 2 and 3) and other persons registered as shareholders on the shareholder register.

The Appellate Court’s Decision

The appellate court (Seoul High Court Decision 2023Na2006442, February 19, 2025) held that confirming the subject shares as part of the decedent’s estate against other shareholders was the most effective and appropriate means of eliminating the uncertainty and risk to the plaintiff’s rights. The Supreme Court did not add any additional legal analysis on this point and upheld the appellate court’s conclusion.

General Principles on Confirmatory Interest

When one co-owner seeks confirmation of another co-owner’s share against a third party, this amounts to seeking confirmation of another person’s legal relationship. A confirmatory interest is recognized only when the rights relationship between those other persons affects the claimant’s own rights (Supreme Court Decision 94Da35008, November 11, 1994). In this case, the shareholder register had been arbitrarily altered to exclude the plaintiff, which justified the plaintiff’s need to seek shareholder status confirmation against other heirs and shareholders.

6. What Are the Practical Implications of This Ruling for South Korea?

This ruling is significant as the first South Korean Supreme Court decision to systematically address multiple issues relating to co-inherited shares, carrying the following important practical implications.

Filling a Gap in Existing Legal Doctrine

Previously, while it was recognized that co-inheritance of shares could create situations where registration was impossible without all co-owners’ cooperation, the Supreme Court had not explicitly addressed what specific remedies were available in such cases. This ruling fills that gap by establishing two new legal principles.

First, co-ownership share transfer registration requests do not constitute “exercise of shareholder rights” under Article 333(2) of the South Korean Commercial Act, and therefore do not require prior designation of a rights exerciser. Second, when registration is impossible due to some co-owners’ non-cooperation, a confirmatory interest in shareholder status with respect to one’s own co-ownership share is exceptionally recognized.

Shift in Litigation Strategy

In practice, future litigation concerning co-inherited shares in South Korea is expected to shift from “co-ownership share transfer registration claims” toward “shareholder status confirmation actions with respect to one’s own co-ownership share.” Co-ownership registration requires all co-owners’ consent, making it practically difficult to achieve when there is a dispute. In contrast, a shareholder status confirmation action can be filed independently.

Limitations: Voting Rights and Dividend Issues

A shareholder status confirmation judgment alone does not directly enable the exercise of voting rights or the receipt of dividends. Most shareholder rights presuppose share transfer registration, and exercising shareholder rights under quasi-co-ownership requires designation of a rights exerciser. Therefore, the confirmation judgment serves as an intermediate remedy to secure one’s legal position, and ultimately, finalizing the estate division to determine share allocation remains essential.

7. How Should Co-Inherited Share Disputes Be Handled in Practice?

Drawing on extensive experience in corporate succession and inheritance disputes, the practical approaches to handling co-inherited share disputes in South Korea can be summarized as follows.

Preventive Measures

The most effective approach is to prepare before disputes arise. It is advisable for the decedent to specify share allocation through a will, or to establish provisions for share handling upon inheritance through shareholders’ agreements or articles of incorporation. This is especially important for shares carrying management control, as prolonged quasi-co-ownership can create significant gaps in corporate governance.

Early-Stage Dispute Resolution

After the estate opens, the first step should be to quickly assess whether cooperation with other co-heirs is possible. If all co-owners agree to co-ownership registration, it can proceed without prior rights exerciser designation (as confirmed by this ruling). However, if some co-owners refuse, it is effective to simultaneously file for a court-ordered estate division to determine share allocation while also filing a shareholder status confirmation action to secure one’s legal position early.

Multi-Tiered Claim Structure for Litigation in South Korea

Based on the claim structure in this case, the following multi-tiered approach can be considered for co-inherited share disputes:

8. FAQ

Atlas Legal provides comprehensive legal services in corporate advisory, corporate disputes, and corporate criminal defense, with particular expertise in share inheritance disputes and management succession in South Korea. Our legal team has extensive experience designing multi-tiered litigation strategies that combine estate division proceedings with shareholder status confirmation actions.

* The legal information presented in this article is intended for general informational purposes only and may vary depending on the specific facts of individual cases. For actual case responses, please consult with an attorney.