CONTENTS
- 1. Business Combination Filing | Procedure

- - Types of Business Combinations
- - Requirements and Standards for a Business Combination Filing
- - Subjects Exempt from a Business Combination Filing
- 2. Business Combination Filing | Prior Consultation System for Business Combination Review

- - Prior Consultation Procedure and Application Requirements
- - Strategic Use of Prior Consultation and Expected Effects
- 3. Business Combination Filing | Practical Importance and Response Strategy

- 4. Business Combination Filing | Practical Checklist

- - Before a Business Combination Filing
- - Step-by-Step Review of a Business Combination Filing
- - After a Business Combination Filing
1. Business Combination Filing | Procedure

A business combination filing is a procedure for formally reporting to the Korea Fair Trade Commission the process by which the business activities of individual companies are integrated with one another.
This goes beyond the level of a simple transaction or cooperation, and it refers to a combination between companies in various respects such as capital, personnel, and organization, and a filing obligation arises where a company of a certain size or larger intends to carry out a business combination.
If a business combination filing is not made, the company may be subject to legal sanctions such as an administrative fine, so it is important to strictly observe the prescribed procedures.
In addition, the combination should be carried out carefully after sufficiently considering its effect on market competition.
In the course of evaluating whether a business combination contains competition-restricting elements, the Korea Fair Trade Commission carefully examines whether the combined companies are likely to occupy a dominant position in the market or to make entry by other competitors difficult.
If it is determined that there is no competition-restricting nature, the company is notified of that fact, and if a competition-restricting nature is found, a corrective measure is issued accordingly.
Therefore, companies that make a business combination filing should thoroughly prepare for the legal issues that may arise in this review procedure and be able to respond promptly and accurately when a problem occurs.
Types of Business Combinations
Under the Monopoly Regulation and Fair Trade Act, the forms of a business combination are classified as follows.
▶Merger : Two or more companies are integrated into a single legal entity by a legal act
▶Acquisition of Shares : Acquiring shares above a certain stake to secure controlling influence over the voting rights of another company
▶Interlocking Directorates : An officer of a particular company concurrently holds office as an officer of another company in a competitive relationship
▶Transfer of Business : Acquiring all or part of a company's business to succeed to the status of the business operator
▶Other : Mutual investment, company division and division-merger, establishment of a controlling company, and similar matters
Requirements and Standards for a Business Combination Filing
A business combination filing obligation arises where the following standards are met.
Standards based on the total assets or revenue of the companies party to the combination
▶Where companies whose domestic revenue or total assets are 300 billion won or more carry out a combination
▶Where the domestic revenue or total assets of the transaction counterpart are 30 billion won or more
In particular, even in the case of a combination between foreign companies, a domestic filing obligation arises if the above requirements are met.
In this case, the determination is made comprehensively, considering not only the transaction amount but also whether there is substantial controlling influence, the shareholding ratio, the right to compose the board of directors, and similar factors.
Subjects Exempt from a Business Combination Filing
Under the Monopoly Regulation and Fair Trade Act, the following types are exempt from the business combination filing obligation.
Concurrent holding of fewer than one-third of the total officers of another company (excluding the representative director)
Merger or transfer of business between a parent company and a subsidiary under the Commercial Act
Merger between affiliated companies where the merged company's own size is less than 30 billion won
Transfer of business where it is less than 10 percent of the transferring company's total assets and the transfer amount is less than 10 billion won
2. Business Combination Filing | Prior Consultation System for Business Combination Review

Since 2024, the Korea Fair Trade Commission has introduced a prior consultation system for business combination review that allows a company to consult with the Commission in advance before submitting a business combination filing.
An application for the prior consultation procedure must be made at least two weeks before the date of the formal filing, and consultation may be conducted on all matters, including whether the simplified review applies, the transaction structure, whether competition is restricted, and sensitive information.
Previously, review was possible only after a formal filing, which made it difficult for a company to coordinate its transaction structure in advance or to recognize competition-restriction issues at an early stage, and the prior consultation system for business combination review was introduced to improve this problem.
Prior Consultation Procedure and Application Requirements
The prior consultation system for business combination review proceeds through the following procedure.
▶Application Deadline : Submit the consultation application to the Korea Fair Trade Commission at least two weeks before the date of the formal filing
▶Subject of Consultation : Overall issues that require discussion at the pre-filing stage, including the transaction structure of the business combination, whether the simplified review applies, the definition of the market and the standards for judging the competition-restricting nature, and the scope of disclosure of sensitive business information
▶Method of Consultation : May be conducted in writing, in person, or remotely (by video conference), with a record kept by preparing minutes of the prior consultation that both parties sign
Through this system, the applicant can ascertain the direction of the Commission's review in advance and check competition-restriction issues at an early stage to adjust the transaction structure beforehand, thereby minimizing the risk of review delay or non-approval.
Strategic Use of Prior Consultation and Expected Effects
The prior consultation system can be actively used in particular in the following situations.
▶Complex business combination transaction structures : combinations that include, beyond a simple merger, a combination of share acquisition, business transfer, corporate division, and similar elements
▶Combinations in new markets or involving digital platforms : combinations in which the market definition is unclear and the assessment of competition restriction is complex
▶Combinations between foreign companies : cases that involve issues such as analysis of the effect on the domestic market, whether a filing is required, and the calculation of the threshold amount
Through prior consultation, a party may obtain an early determination of whether the Fair Trade Commission will apply simplified review, and by discussing competition restriction issues in advance, the party may modify the combination structure or supplement materials beforehand.
In addition, through consultation on the scope and method of disclosing sensitive materials, the filing party's business confidentiality may also be protected.
3. Business Combination Filing | Practical Importance and Response Strategy

A business combination goes beyond a simple M&A transaction and is an act that can change the market structure within the relevant industry and have a direct effect on the competitive environment.
In particular, for large domestic and international M&A, venture investment, and financial-business combinations, the Commission's review standards have been gradually strengthening, and the market share after the combination, the competition-restricting nature, and the possibility of consumer harm function as the main review requirements.
Therefore, when pursuing a transaction such as M&A, investment, transfer of business, or establishment of a subsidiary, a company should review proactively from the transaction-structure design stage whether the transaction is subject to a business combination filing, and should carry out a lawful filing procedure and determine whether a filing is required.
To prevent administrative dispositions and penalty surcharges from the Korea Fair Trade Commission, the following prior legal review and response are recommended.
▶Confirming the revenue and total assets of the companies party to the combination
▶Reviewing the business combination review standards and the main review issues
▶Reviewing the adequacy of the filing and the materials to be submitted
▶Establishing a review response strategy (preparing market definition, materials rebutting the competition-restricting nature, and similar items)
Because punishment for a violation of the Monopoly Regulation and Fair Trade Act has a significant effect on corporate trust and the maintenance of management control, if a business combination is planned, you may wish to obtain prior advice from an attorney experienced in fair trade.
See More
4. Business Combination Filing | Practical Checklist
Please review the practical checklist for companies relating to business combination filings so that the procedures may be carried out without omission.
Before a Business Combination Filing
■Review of whether a filing obligation arises
☐ Type of business combination (share acquisition, concurrent holding of officer positions, asset transfer, business transfer, merger, joint business, and similar)
☐ Whether Articles 12 and 13 of the Monopoly Regulation and Fair Trade Act apply
☐ Whether the combining parties meet the thresholds for asset size, sales, and market share
■Confirmation of the filing period
☐ Share acquisition : within 30 days after the acquisition date
☐ Asset or business transfer : within 30 days after the date the contract is concluded
☐ Merger : within 30 days after the date of the merger agreement
☐ Concurrent holding of officer positions : within 30 days after the date the positions are concurrently held
■Review of whether to use the prior consultation system
☐ Whether to submit the prior consultation application up to two weeks before the formal filing
☐ Consultation on the transaction structure, market definition, and whether simplified review applies is possible
Step-by-Step Review of a Business Combination Filing
■Preparation of filing documents
☐ Business combination filing form
☐ Copy of the contract relating to the combination
☐ Materials describing the company overview and current business status
☐ Financial statements for the most recent three fiscal years
☐ Analytical materials on market share and competitive structure
☐ Other materials requested by the Fair Trade Commission (transaction structure diagrams, scenarios, internal review reports, and similar)
■Definition of the combination market
☐ Definition of the product market and the geographic market
☐ Securing the basis for the definition (demand substitutability, supply substitutability, the SSNIP test, and similar)
☐ Securing the basis and materials for calculating market share
■Review of eligibility for simplified review
☐ Whether assets and sales are below a certain size
☐ Whether the businesses have a vertical or horizontal relationship
☐ Whether it can be proven that a combination between foreign companies has no domestic effect
■Assessment of competition restriction
☐ Analysis of market share changes and competitive structure in a horizontal combination
☐ Whether foreclosure and blocking effects exist in a vertical combination
☐ Possibility of gathering the opinions of competitors and counterparties
☐ Preparation of measures to resolve competition restriction concerns (corrective measures, intention of conditional approval, and similar)
■Other considerations under the review guidelines
☐ Review of data combination effects in combinations of digital and platform businesses
☐ Review reflecting the possibility of consumer harm and the public interest
☐ Organization of whether foreign approval has been obtained and whether filings have been made with foreign competition authorities
After a Business Combination Filing
■Confirmation of whether the filing has been received
☐ Confirm the Fair Trade Commission receipt number and the date of acceptance
■Response during the review process
☐ Prepare for requests to supplement materials
☐ Prepare to submit corrective plans if a notice of competition restriction concerns is given
■Confirmation of the approval result
☐ Confirm whether the result is approval, conditional approval, or prohibition
☐ Establish a plan to perform the conditions in the case of conditional approval
■Subsequent management
☐ Submit an implementation plan for performing the conditions
☐ Submit to the Fair Trade Commission the status of performance of corrective measures such as divestiture
☐ Report and confirm completion of performance of the conditions
Watch related video content
for this case study.
✨Meet Daeryun Law Firm’s corporate legal and tax administration experts!












