Mae Wha Choi Partner
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  • TEL 82 2 6003 7545
  • FAX 82 2 6003 7026
  • E-MAIL
Mae Wha Choi is a partner at Yoon & Yang LLC. Her main practice area is antitrust & competition.
Mae Wha represented clients in major cartel matters in various industries, such as steel, cable, automobile parts, and paper manufacturing. She has also advised and acted in disputes related to the abuse of market dominance and unfair trade practices in the IT, liquor, cosmetics, pharmaceutical, and insurance industries, as well as labeling/advertising regulations in the liquor, food, electronics, and medical equipments sectors. She is also experienced in advising and representing multinational clients in cross-border business combination approval, international cartel conduct, and unfair trade practices (including the Fair Transactions in Subcontracting Act, and the Fair Agency Transactions Act).


  • 2012-present Yoon & Yang LLC
  • 2022-present Non-Governmental Advisor, Unilateral Conduct Working Group (UCWG), International Competition Network (ICN)
  • 2020 Secondment, Apple Korea


  • 2019 New York University School of Law, LL.M.
  • 2012 Seoul National University School of Law, J.D.
  • 2006 Seoul National University College of Law, LL.B.

Representative Matters

[Illegal Cartel Conduct]
  • Represented German and Japanese companies in a KFTC investigation and administrative proceeding in respect of illegal cartel conduct of multinational automobile parts manufacturers
  • Represented a Korean subsidiary of a multinational machinery parts manufacturer in a conveyer belt bid rigging
  • Represented Company H in a KFTC investigation in respect of monopoly and collusion within the helicoptor insurance market
  • Represented Company K in a KFTC investgation in respect of bid rigging of property insurance of Korea Land and Housing Corporation

[Business Combination]
  • Advised on the business combination review in respect of the split-merger of IBM’s Global Technology Service (GTS) unit
  • Advised on the business combination review in respect of the stock acquisition of Hyundai Motor Company’s local branch in Turkey
  • Advised on the business combination review in respect of establishing a joint venture between ALD and Mitsubishi UFJ Lease & Finance
  • Advised on the business combination review in respect of Microsoft’s corporate acquisition of Nokia’s mobile devices and services unit

[Abuse of Market Dominance/Unfair Trade Practices]
  • Advised on a KFTC investigation in respect of unfair trade practices of Merial Korea
  • Advised on a KFTC investigation and civil/administrative proceeding in respect of abuse of market dominance of LG Electronics

  • Represented Samsung Electronics in a KFTC investigation in respect of ‘QLED TV’ and its violation of the Act on Fair Labeling and Advertising
  • Represented HiteJinro in a Ministry of Food and Drug Safety investigation in respect of ‘TERRA’ and its violation of the Act on Labeling and Advertising of Foods


  • Big Data and Market Power, LL.M. Dissertation, New York University School of Law, 2019
  • Trends of License Disputes for Standard Essential Patents in the Automobile Industry: A Focus on the Nokia v. Daimler and Continental v. Avanci Decisions (Co-Author), Competition Journal 206, 2021
  • EU Commission’s Decision to Aprove the Google-Fitbit Business Combination (Co-Author), Competition Journal 208, 2021
  • Restraints of trade and dominance in South Korea: Overview (Co-Author), Practical Law Clobal Guide, Thomson Reuters, 2021
  • Getting The Deal Through: Competition in Digital Markets (Co-Author), Korea Chapter, 2022
  • Epic Games, Inc. v. Apple Inc. Decision of the United States Northern District Court of California (Co-Author), Competition Journal 210, 2022