Shareholders' Agreement in Korea: What Every Startup Co-Founder Must Know

Starting a company with co-founders in South Korea? One of the most critical documents you'll need — yet one that many founders overlook — is the shareholders' agreement (SHA, 주주간 계약서). Unlike articles of incorporation (정관), which are filed with the registry, an SHA is a private contract between shareholders that governs equity, decision-making, and exit scenarios.

Why You Need a Shareholders' Agreement

Korean corporate law provides a basic framework through the Commercial Act (상법), but it doesn't address many real-world scenarios that arise in startups: What happens if a co-founder leaves? How are deadlocks resolved in a 50:50 structure? Can a shareholder sell their shares to a competitor?

An SHA fills these gaps. It's not legally required, but it's practically indispensable for any company with two or more shareholders.

Articles of Incorporation vs. Shareholders' Agreement

Feature	Articles of Incorporation (정관)	Shareholders' Agreement (SHA)
Legal nature	Mandatory corporate document	Private contract
Filing	Registered with court	Not filed — confidential
Binding scope	All shareholders	Only signatories
Amendment	Special resolution at general meeting	Mutual agreement
Detail level	Basic governance	Detailed rights and obligations

Key Clauses Explained

1. Equity Ratio and Capital Contributions

The SHA should clearly state each shareholder's ownership percentage and contribution type — whether cash, intellectual property, technology, or sweat equity. This is especially important in Korea where 현물출자 (in-kind contributions) require court-appointed appraisal.

2. Voting Rights and Decision-Making

Korean startups typically structure decisions in tiers:

• Ordinary resolution: Simple majority (day-to-day operations)
• Special resolution: Two-thirds supermajority (new share issuance, M&A, major investments)
• Unanimous consent: All shareholders (charter amendments, dissolution)

Reserved matters (중요 사항) should be explicitly listed to prevent unilateral decisions by majority shareholders.

3. Pre-Emption Rights (우선매수권)

When a shareholder wants to sell their shares to a third party, existing shareholders get the right of first refusal at the same terms. This prevents unwanted outsiders from entering the company.

4. Drag-Along and Tag-Along Rights

Right	Korean Term	Purpose
Drag-Along (동반매도청구권)	Majority can force minority to sell	Enables clean exits for acquirers
Tag-Along (동반매도참여권)	Minority can join majority's sale	Protects minority from being left behind

5. Non-Compete and Confidentiality

Korean courts generally enforce non-compete clauses for 1-2 years post-departure, provided the scope and geographic restrictions are reasonable. The SHA should also include comprehensive confidentiality provisions covering business secrets, customer data, and technology.

6. Deadlock Resolution

For equal-ownership structures, deadlock provisions are critical:

• Escalation procedure: CEO negotiation → external mediation → arbitration
• Russian Roulette clause: One party names a price; the other must buy or sell at that price
• Texas Shootout: Both parties submit sealed bids; highest bidder buys

7. Anti-Dilution Protection

Protects existing shareholders from excessive dilution in future funding rounds. Common methods include weighted-average and full-ratchet anti-dilution.

Practical Resources in Korea

Standard Templates

• Ministry of SMEs and Startups (중소벤처기업부): Provides standardized SHA templates for Korean startups
• ZUZU (주주): Online equity management platform with downloadable templates and cap table tools
• K-Startup: Government-supported startup portal with reference documents

Drafting Checklist

• Shareholder details and equity percentages
• Board composition and CEO appointment
• Decision-making thresholds (ordinary/special/unanimous)
• Share transfer restrictions and pre-emption rights
• Drag-along and tag-along provisions
• Non-compete and confidentiality obligations
• Dividend policy
• Deadlock resolution mechanism
• Penalty clauses for breach
• Dispute resolution (KCAB arbitration or court jurisdiction)

Dispute Resolution: KCAB Arbitration

The Korean Commercial Arbitration Board (대한상사중재원, KCAB) is the preferred dispute resolution venue for shareholder disputes:

Factor	Litigation	KCAB Arbitration
Privacy	Public proceedings	Confidential
Duration	1-3 years	6-12 months
Appeal	Three-tier system	Final and binding
International enforcement	Limited	Enforceable in 170+ New York Convention countries

Sharing Confidential Documents Securely

An SHA contains highly sensitive information — cap tables, equity splits, vesting schedules, and strategic plans. Sharing drafts via email or iMessage creates security risks.

LOCK.PUB lets you share SHA drafts and cap table data through password-protected, encrypted memos. Set an expiration time so the document self-destructs after review, minimizing the risk of leaks during negotiation rounds.

Frequently Asked Questions

Is an SHA legally enforceable in Korea?

Yes. It's a valid private contract under Korean civil law. However, if it conflicts with the articles of incorporation, the articles may prevail — so it's important to align both documents.

Can we create an SHA after the company is already operating?

Yes, though it's harder to reach agreement once disputes have begun. The sooner you formalize the agreement, the better.

Do we need a lawyer?

Standard templates are a good starting point, but a startup-specialized lawyer should review clauses tailored to your specific situation — especially anti-dilution, vesting, and exit provisions.

Final Thoughts

A shareholders' agreement is the document you create when everything is fine, so it protects you when things aren't. For Korean startups navigating equity splits, investor rounds, and co-founder dynamics, it's not optional — it's foundational.

When sharing drafts between co-founders, use LOCK.PUB to add password protection and automatic expiration. Trust between partners is essential, but documenting that trust is what separates professional ventures from handshake deals.