South Korea Commercial Act Amendments 2026: Board & Investor Compliance Checklist

The South Korea Commercial Act amendment 2026 represents the most significant overhaul of corporate governance rules the country has enacted in over a decade. Following promulgation on September 9, 2025, the National Assembly gave final parliamentary approval on February 25, 2026, clearing the way for a suite of reforms that touch every listed and many unlisted Korean companies. The changes centre on three pillars: mandatory treasury-share cancellation, strengthened independent-director requirements, and expanded board accountability, collectively framed as South Korea’s answer to the long-standing “Korea discount” on equity valuations. For boards, general counsel, CFOs and foreign investors with Korean exposure, the compliance window is narrow and the practical steps are substantial.

Executive Summary, What Boards and Investors Must Know Now

South Korea’s revised Commercial Act introduces mandatory cancellation of newly acquired treasury shares, tighter rules on the appointment and duties of independent directors, and broader personal liability for board members who breach their fiduciary obligations. The reforms apply primarily to listed large companies but extend in varying degrees to mid-cap listed firms, unlisted companies and subsidiaries of foreign-parented groups.

The immediate priority for every affected company is to audit existing treasury-share holdings, review board composition against the new independence criteria, and update corporate charters and D&O insurance policies. Industry observers expect enforcement to be rigorous given the political prominence of the corporate governance reform in South Korea and the government’s stated aim of closing the valuation gap with peer markets.

Quick 10-Step Compliance Checklist for Korean Companies

This compliance checklist for Korean companies organises the most critical tasks into three time horizons. Boards and in-house counsel should assign a named owner to each step and track progress against the deadlines below.

Immediate actions (0–3 months)

1. Conduct a treasury-share audit. Identify all treasury shares held, the date and method of acquisition, and current book value. Owner: CFO / Finance team.
2. Map board composition against new independence criteria. Review each independent director’s tenure, affiliations and related-party connections against the revised statutory tests. Owner: General Counsel / Nomination Committee.
3. Engage external Korean corporate counsel. Commission a formal gap analysis comparing your current articles of incorporation, board charter and committee terms of reference against the amended Act. Owner: General Counsel.
4. Brief the board. Schedule a dedicated board session to explain the amendments, the compliance timeline and individual directors’ expanded liability exposure. Owner: Corporate Secretary.

Short-term actions (3–9 months)

5. Draft and adopt treasury-share cancellation resolutions. Prepare board resolutions authorising the cancellation of newly acquired treasury shares within the statutory one-year window and existing shares within the six-month grace period. Owner: Board / CFO.
6. Amend articles of incorporation. Update charter provisions on director appointment, cumulative voting mechanics and treasury-share treatment; prepare shareholder meeting agenda items. Owner: General Counsel.
7. Review and upgrade D&O insurance. Assess whether current policy limits, coverage triggers and indemnity provisions remain adequate under the expanded Korea board accountability rules. Owner: Risk / General Counsel.
8. Update internal compliance training. Roll out director induction materials and annual compliance training reflecting the new duty-of-loyalty and due-care standards. Owner: Compliance team.

Long-term actions (9–18 months)

9. Align capital-return and buyback policies. Revise share-repurchase programmes, dividend policies and capital-return frameworks to account for mandatory treasury-share cancellation and its balance-sheet effects. Owner: CFO / Investor Relations.
10. Monitor subordinate legislation and regulatory guidance. Track implementing regulations, Financial Services Commission guidance, and Korea Exchange rule changes; update compliance programme accordingly. Owner: General Counsel / Compliance.

Key Changes Under the South Korea Commercial Act Amendment 2026

The Commercial Code amendment 2025–2026 introduces reforms across four main areas. Below is an article-by-article summary of the provisions that carry the greatest practical impact.

Treasury-share cancellation rules

The headline reform is mandatory treasury-share cancellation. Under the revised Act, companies that acquire their own shares must cancel them rather than holding them indefinitely on the balance sheet. Newly acquired treasury shares must be cancelled within one year of acquisition. Existing treasury shares held before the effective date are subject to a six-month transitional grace period. The goal is to prevent controlling shareholders from using treasury shares to entrench their voting power without genuine economic exposure, a practice that had long drawn criticism from domestic and international investors.

Independent director requirements and cumulative voting

The independent director requirements for Korea in 2026 raise the bar for board composition and nomination processes. The amendments tighten the independence criteria, expanding the list of disqualifying affiliations and relationships, and introduce cumulative voting as a default mechanism for the election of directors at large listed companies. Companies may opt out of cumulative voting only by an explicit charter provision approved by shareholders. The likely practical effect will be greater board-level representation for minority shareholders, particularly at chaebol-affiliated entities where concentrated ownership has historically dominated the nomination process.

Expanded director duties and liability

The revised Act codifies a broader duty of loyalty, supplementing the existing duty of due care. Directors now face explicit obligations to act in the interest of the company and its shareholders as a whole, not merely to avoid negligence. The amendments also expand the circumstances under which directors may be held personally liable, lower evidentiary thresholds for derivative suits, and introduce statutory grounds for administrative fines where directors fail to comply with treasury-share or disclosure obligations.

Shareholder rights and voting changes

Beyond cumulative voting, the reforms strengthen minority shareholder rights by reducing the shareholding thresholds required to exercise inspection rights, convene extraordinary general meetings and bring derivative actions. Early indications suggest these changes will empower activist investors and institutional shareholders who have historically found it difficult to exercise governance influence at Korean corporates.

Who Is in Scope, Entity Types, Thresholds and Exemptions

The scope of the South Korea Commercial Act amendment 2026 varies by provision, but the broadest rules, particularly on treasury shares and director duties, apply to all stock companies (jusik hoesa) formed under the Commercial Act. More demanding obligations, such as mandatory cumulative voting and enhanced independent-director composition rules, apply on a tiered basis.

Treasury Shares, Operational, Accounting and Board Implications

Mandatory treasury share cancellation is the single most operationally disruptive element of the reforms. Companies must re-engineer share-repurchase programmes, adjust balance sheets and rethink capital-return strategies.

Required board resolutions and shareholder approvals

Boards must formally resolve to cancel treasury shares within the statutory deadlines. Where cancellation requires a reduction of stated capital, shareholder approval at a general meeting may be necessary. Companies should calendar these resolutions well ahead of the deadlines and prepare accompanying disclosure to the Korea Exchange where applicable.

Accounting and capital effects

Cancellation of treasury shares reduces the number of issued shares and may affect earnings-per-share calculations, capital-adequacy ratios and loan covenants tied to equity metrics. CFOs should model the impact on financial statements and proactively engage auditors and lenders.

How to handle existing treasury shares

Existing treasury shares held before the statutory effective date benefit from a six-month grace period. After that window closes, non-compliance exposes the company and its directors to administrative fines. The following table summarises the treatment by entity type.

Director Duties, Independent Directors and Liability Mitigation

The expanded Korea board accountability rules demand a fundamental reassessment of how companies recruit, support and protect their directors. The practical stakes are higher than at any point in recent Korean corporate law.

Changes to duty of loyalty and due care

The codified duty of loyalty now requires directors to act in the interests of the company and its shareholders collectively, not just to avoid gross negligence. Courts will be able to apply a more searching standard of review when evaluating board decisions. Industry observers expect this to increase derivative litigation, particularly where treasury-share rules are not followed or where conflicted transactions receive inadequate board scrutiny.

Independent director selection, resignation and liability insurance

The independent director requirements for Korea in 2026 tighten eligibility criteria: former employees, significant business counterparties, and close family members of controlling shareholders now face longer cooling-off periods before they can serve. Independent directors who resign mid-term trigger replacement obligations that must be fulfilled within a compressed statutory timeline. Companies should maintain a standing pipeline of qualified independent-director candidates.

Board charters, indemnities and D&O considerations

Every company within scope should update its board charter to reflect the new duties, committee structures and reporting lines. Indemnity provisions in directors’ service agreements should be reviewed to ensure they cover the expanded grounds for personal liability. D&O insurance policies should be stress-tested against scenarios arising from the new rules, including claims related to treasury-share non-compliance, failure to meet independent-director composition requirements, and derivative actions brought under the lowered shareholding thresholds.

Sample charter clause (English template, localise to Korean): “The Board shall ensure that the Company complies at all times with the treasury-share cancellation requirements of the Commercial Act as amended, including by adopting cancellation resolutions within the time limits prescribed by statute and reporting compliance to the Audit Committee at each regular meeting.”

Penalties, Enforcement and Shareholder Litigation Risk

Non-compliance with the South Korea Commercial Act amendment 2026 carries real consequences. The revised Act introduces administrative fines for companies that fail to cancel treasury shares within the statutory deadlines. Directors who breach their expanded duties face personal civil liability and, in serious cases, potential disqualification. As reported by Reuters, the government has signalled that enforcement will be active, not merely symbolic, reflecting the political commitment behind the corporate governance reform in South Korea.

From a litigation-risk perspective, the lowered thresholds for derivative suits and inspection rights make it substantially easier for minority shareholders to bring claims. Companies should:

• Document all board deliberations on treasury-share treatment and director appointments to create a defensible record.
• Establish a compliance-monitoring protocol with clear escalation triggers.
• Pre-agree legal defence strategies with external counsel for potential derivative or regulatory actions.

Special Considerations for Foreign Investors and Cross-Border Transactions

The impact on foreign investors in Korea in 2026 extends across portfolio management, M&A and corporate structuring. Foreign-parented subsidiaries and portfolio investors with significant Korean holdings must build the new rules into their governance frameworks and transaction playbooks.

M&A and tender-offer implications

Acquirers should factor mandatory treasury-share cancellation into valuation models and purchase-price mechanics. Where a target holds material treasury shares, the cancellation obligation may alter post-closing capital structures. Closing conditions and material-adverse-change clauses in share purchase agreements should explicitly address compliance with the amended Act.

FDI screening and disclosure impacts

While the amendments do not directly alter Korea’s foreign direct investment screening regime, the enhanced disclosure and shareholder-rights provisions may increase transparency obligations for foreign investors crossing certain ownership thresholds. Foreign counsel should coordinate Korean regulatory advice early in any transaction timeline.

Capital returns and repatriation planning

Mandatory cancellation eliminates the option of using treasury shares for future re-issuance or as acquisition currency. Foreign parent companies relying on Korean subsidiary share repurchases as part of group capital management will need to redesign their repatriation strategies. Tax and transfer-pricing implications should be assessed on a jurisdiction-by-jurisdiction basis.

Implementation Timeline and Board Calendar

The following tables provide a practical roadmap for boards navigating the Commercial Code amendment 2025–2026.

Table A: Legislative milestones

Table B: Board calendar, next 12 months

Practical Annexes, Sample Board Resolution and Bylaw Clauses

Sample board resolution: treasury-share cancellation

“RESOLVED, that pursuant to Article [X] of the Commercial Act as amended, the Board hereby authorises the cancellation of [number] treasury shares of common stock held by the Company, acquired on [date(s)], and directs the Chief Financial Officer to effect such cancellation, make all necessary filings with the registry and the Korea Exchange, and report the completion thereof to the Board and the Audit Committee.”

Sample independent-director appointment clause

“The Nomination Committee shall ensure that all candidates for independent director satisfy the independence criteria set forth in the Commercial Act as amended, including the expanded cooling-off and affiliation rules effective from September 10, 2026. No candidate shall be proposed who would, upon appointment, cause the Board to fall below the minimum independent-director composition required by law.”

Note: All sample clauses are provided in English for illustrative purposes. Korean-language versions must be prepared by qualified Korean counsel to ensure statutory compliance and enforceability.

Conclusion and Recommended Next Steps

The South Korea Commercial Act amendment 2026 demands prompt, structured action from every company within its scope. The compliance window between parliamentary passage and the reported effective date of September 10, 2026, is narrow, and the penalties for inaction are real. Boards, general counsel and foreign investors should prioritise three immediate next steps:

• Commission a formal gap analysis of your company’s current governance documents, treasury-share holdings and board composition against the full text of the amended Act.
• Activate the 10-step compliance checklist outlined above, assigning named owners and calendar deadlines for each action item.
• Engage experienced Korean corporate counsel to prepare localised charter amendments, board resolutions and regulatory filings well ahead of the statutory deadlines.

Corporate governance reform in South Korea is no longer aspirational, it is law. Companies that move early will not only avoid penalties but position themselves favourably with the institutional and foreign investors whose capital the reforms are designed to attract.

Sources

1. Reuters, South Korea parliament approves commercial act revision (Feb 25, 2026)
2. Korea.net, Government news on National Assembly passage (Feb 26, 2026)
3. KLRI e-Law, Official English text of the Commercial Act
4. Kim & Chang, Advisory on Commercial Act amendments
5. KoreanLII, 2025 revised Commercial Act summary
6. Chosunbiz, Reporting on treasury-share deadlines and implementation (Feb 23, 2026)
7. Sodali, Korea implements Commercial Code reform: governance updates