Hostile M&A Lawyer
Hostile M&A Lawyer | Understanding Attack and Defense Before the Battle Starts
Hostile M&A refers to an attempt to acquire control of a listed company without the consent, and often against the active resistance, of incumbent management — typically through open market share purchases, tender offers, or proxy contests at a shareholder meeting. In Korea, the fight is fought as much through disclosure filings and injunction petitions as through the shareholder meeting itself. Both sides need to move within tight statutory windows: a stake-building investor must report crossing the 5% threshold within days (자본시장과 금융투자업에 관한 법률 제147조), while a target board weighing defensive measures must be careful that those measures do not themselves become the subject of an injunction.
Hostile M&A | Three Common Pathways in a Control Contest
Not every hostile M&A situation plays out the same way. The path a campaign takes depends on whether the attacker wants outright control, board seats, or simply a premium exit — and depends on how much cash and time the target has to respond.
| Speed | Fast once announced, but requires large capital |
| Disclosure | Tender offer statement filed in advance (자본시장법 제133조) |
| Target response | Board opinion on the offer is mandatory |
| Typical use | When attacker already holds a meaningful stake |
Tender offers must meet minimum price and disclosure requirements before shares can be purchased from the public (자본시장법 제133조, 제134조).
| Speed | Tied to the annual or special meeting calendar |
| Disclosure | Solicitation of proxies is separately regulated |
| Target response | Record date and quorum planning become critical |
| Typical use | When attacker holds a meaningful but non-controlling stake |
Proxy solicitation is governed by the Capital Markets Act provisions on proxy solicitation, and mismanaged solicitation documents can themselves be challenged.
| Speed | Slow, often over months |
| Disclosure | 5% reporting duty triggers once threshold is crossed (자본시장법 제147조) |
| Target response | Early warning depends on catching disclosure filings |
| Typical use | Activist funds building leverage before going public with demands |
Purpose of holding (single purpose vs. purpose of influencing management) must be disclosed and any change must be reported within 5 days (자본시장법 제147조).
Hostile M&A | The 5% Rule and Large Shareholding Disclosure
Almost every hostile M&A campaign in Korea begins to become visible through mandatory ownership disclosure filings. Understanding these filings is often the first thing both an attacker's counsel and a target's counsel look at.
When the reporting duty is triggered
Any person or group who comes to hold 5% or more of the voting shares of a listed company must report this to the Financial Services Commission and the exchange within 5 business days, and must also report thereafter whenever the holding ratio changes by 1% or more (자본시장법 제147조). This filing must disclose the stated purpose of the holding, distinguishing between a passive investment purpose and a purpose of influencing corporate management.
Cooling-off period after a management-purpose report
If the reporting purpose is disclosed as influencing management, the reporting person is restricted from exercising voting rights on the newly acquired shares and from acquiring additional shares for a short period following the report, giving the target company a limited window to prepare a response (자본시장법 제150조). Whether this cooling-off period applies, and its exact scope, is frequently a point of dispute and is worth reviewing carefully with counsel given the fact pattern.
Consequences of a false or delayed report
A shareholder who files late, omits required information, or misstates the purpose of holding can face sanctions and, in some circumstances, restrictions on voting the shares involved. Target companies sometimes challenge an attacker's disclosure filings as inaccurate as an early defensive tactic, which can delay the attacker's next move while the dispute is resolved.
Hostile M&A | Defensive Measures Available to a Target Company
Korean corporate law does not provide as broad a menu of defensive tools as some other jurisdictions (there is no general poison pill regime under the Commercial Act), so a target board's options are shaped by what the articles of incorporation already allow and by careful use of existing corporate structures.
Treasury shares and third-party allotment
A board may consider issuing new shares to a friendly third party (a so-called white squire) to dilute an attacker's stake, but this must be justified by a legitimate business purpose such as raising capital, because share issuances aimed purely at entrenching management can be enjoined by the court (상법 제418조 제2항). Courts scrutinize the timing and pricing of such issuances closely when they occur during an active takeover contest.
Staggered boards and supermajority provisions in the articles
Because these provisions must be built into the articles of incorporation before a contest begins, they function as preventive rather than reactive defenses. A target that has not adopted such provisions in advance generally cannot introduce them mid-contest without shareholder approval, which itself becomes a battleground if an attacker already holds meaningful voting power.
Litigation as a defensive tool
Filing for an injunction against a tender offer, a proxy solicitation, or a stake-building attacker's exercise of voting rights is often the fastest practical defense, since a share issuance or shareholder meeting resolution can be halted or nullified if procedural or substantive defects are shown. Timing is critical: an injunction petition filed after a shareholder meeting has already been held is far weaker than one filed before the meeting.
Hostile M&A | Building and Executing a Control Campaign
An attacker's strategy centers on accumulating a stake efficiently, timing disclosure to preserve optionality, and choosing the right vehicle — open market purchases, a tender offer, or a proxy contest — to convert that stake into actual influence over the board.
Structuring stake accumulation to avoid early exposure
An attacker will often coordinate with several affiliated investors to build a position, but the Capital Markets Act treats persons acting in concert as a single reporting group, so structuring around the 5% threshold through nominally separate purchasers carries real legal risk (자본시장법 제147조). Miscalculating who counts as part of the reporting group is one of the most common errors on the acquirer side.
Preparing for the target's litigation response
Because target companies frequently respond to a stake-building campaign with an injunction challenging the accuracy of the attacker's disclosure report, an attacker should prepare disclosure filings that can withstand scrutiny well before making any public move, rather than treating the filing as a formality.
Winning the shareholder meeting, not just the stake
Ultimately a proxy contest is decided by voting shares actually present at the meeting, not by total shares outstanding, so an attacker's campaign should focus heavily on record-date planning, communication with institutional and retail shareholders, and understanding quorum and voting thresholds under the company's articles.
Hostile M&A | Injunctions and Shareholder Meeting Disputes
Because hostile M&A situations move on a matter of weeks, most disputes are resolved through provisional injunctions rather than a full trial on the merits, and the outcome of that injunction petition often determines the outcome of the entire contest.
Injunctions against share issuance or defensive measures
A shareholder can petition the court to enjoin a new share issuance, arguing it was made for an improper purpose such as entrenching management rather than raising funds, and Korean courts will examine the timing, pricing, and allottee of the issuance in light of the surrounding takeover contest (상법 제418조 제2항). If granted, the injunction can block the issuance before it closes.
Challenging or defending a shareholder meeting resolution
After a shareholder meeting is held, either side may seek to have a resolution nullified or revoked on grounds such as defective notice, an improper record date, or errors in vote counting (상법 제376조, 제380조). Because these actions can be filed after the fact, they remain relevant even once the meeting itself has concluded.
Hostile M&A | From Initial Consultation to Resolution
Counsel reviews current shareholding disclosures, the company's articles of incorporation, and the calendar for any upcoming shareholder meeting to map out realistic timelines and leverage points.
For an attacker, this means preparing accurate 5% rule filings; for a target, this means auditing the attacker's existing filings for defects that could support a challenge.
The board (or the attacker) evaluates available tools — share issuance, record-date planning, proxy solicitation, or a tender offer — against what the articles of incorporation and existing case law actually permit.
If either side moves to block an action, counsel prepares and responds to provisional injunction petitions, which are usually decided on an expedited timeline before the underlying event (issuance, meeting, or offer) takes place.
On the day of the meeting, counsel manages quorum and voting procedures; afterward, either side may pursue or defend against an action to nullify the resolution if defects are alleged.
Hostile M&A | How Fees Are Typically Calculated
Set based on the scope of ongoing advisory work, such as reviewing disclosure filings, structuring stake accumulation, or preparing defensive measures, and typically billed as a fixed monthly or project retainer rather than by the hour.
Calculated separately from advisory work because injunction proceedings require dedicated drafting and, often, urgent same-week filings; complexity of the underlying corporate action affects this fee.
If a shareholder meeting resolution is challenged after the fact, fees are generally structured around the value or significance of the corporate action at stake, similar to other commercial litigation.
Where appropriate and permitted, a portion of the fee may be linked to the outcome of a specific milestone, such as successfully blocking or completing a share issuance, rather than the ultimate business outcome of the takeover contest.
Court filing fees, service costs, and expenses for financial or valuation experts (often necessary in share issuance pricing disputes) are billed separately from the professional fee.
※ Costs vary depending on case complexity and specific circumstances; exact fees will be provided during consultation. No specific outcome is guaranteed.
Hostile M&A | Self-Assessment Checklists
1️⃣ For Target Company Management
- Do you know the exact shareholding percentage and stated purpose reported by any shareholder holding 5% or more of your company?
- Have you reviewed your articles of incorporation to see what defensive measures, if any, were adopted before a contest began?
- Is there an upcoming shareholder meeting where record date planning needs to start now rather than later?
- Would a new share issuance under consideration survive scrutiny of its purpose, pricing, and timing if challenged?
2️⃣ For Acquirers and Activist Investors
- Have you correctly identified everyone who counts as part of your reporting group under the acting-in-concert rules?
- Is your 5% rule filing accurate as to purpose of holding, and can it withstand a challenge from the target?
- Do you understand the voting restrictions that may apply if your filing discloses a management-influencing purpose?
- Have you mapped out the target's record date and quorum requirements before committing capital?
3️⃣ Before Filing or Responding to an Injunction
- Is the underlying corporate action (issuance, meeting, tender offer) still capable of being halted, or has it already closed?
- Do you have documentary evidence of the true purpose behind the disputed action?
- Have you calculated the realistic timeline for a court decision against the calendar of the underlying event?
