Jeong Yoon CHOI - Lee & Ko

Partner

Jeong Yoon CHOI

E[email protected]

T+82-2-772-4283

Antitrust & Competition

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Her practice encompasses a broad range of antitrust and competition matters, including abuse of market dominance, merger control, international and domestic cartels, unfair trade practices, and unfair inter- affiliate transactions. She also advises on matters involving subcontracting, franchising, distribution and consumer protection laws. Ms. Choi regularly provides strategic counsel on antitrust compliance, responds to Korea Fair Trade Commission (KFTC) investigations, handles mediation and administrative proceedings, and represents clients in antitrust-related litigation and criminal investigations. With deep experience in cross-border and domestic merger filings, cartel defense, and antitrust compliance programs, Ms. Choi is a trusted advisor to multinational corporations and major Korean conglomerates. She has conducted mock dawn raids, reviewed compliance frameworks, and advised on internal audits and risk mitigation strategies. In addition to her legal practice, Ms. Choi has been active in professional outreach. She served as a guest lecturer on leniency applications at the “2019 International Training Workshop for Competition Authority Officials from Developing Countries,” organized by the KFTC’s International Cooperation Division. Ms. Choi’s work has earned recognition from leading legal directories and industry publications. She has been named a ‘Rising Star’ by Asialaw, a ‘Leading Associate’ by The Legal 500, a ‘2025 Rising Star’ by Legal Times, a ‘Best Lawyer (Antitrust & Competition)’ by Korea Economic Daily, a 'Stand-out Lawyer' by Thomson Reuters, and was awared ‘Lawyer of the Year’ for South Korea at the 2024 Asialaw Awards. Representative Cases Prepared merger filing for GE’s acquisition of Alstom’s power and grid businesses Prepared merger filing for Lenovo’s acquisition of IBM’s server business Prepared merger filing for AMEC’s share purchase in Foster Wheeler Prepared merger filing for Qatar Sovereign Investment Fund’s acquisition of American Express Co.’s business-travel division Prepared merger filing for Aurelius Group’s share acquisition of LSG Sky Chefs Korea Co., Ltd. Prepared merger filing for LG Group’s acquisition of ZKW Group Advised an interested third party in connection with Applied Materials’ proposed acquisition of Tokyo Electric Represented international auto parts companies in the KFTC investigations into alternators, ignition coils, and starters Represented international auto parts companies in administrative appeals to cancel administrative fines and penalties for auto parts cartels involving alternators and ignition coils Successfully represented Hanhwa Systems in an administrative lawsuit against the rejection of the company’s leniency application Represented domestic and foreign shipping liners in KFTC investigations into collusion on freight rates Represented an international capacitor company in the international capacitor cartel case Represented an international shipping liner in the roll-on roll-off cartel investigation Represented an international company in the export motorcycle cartel investigation Represented a defense contractor in a bid-rigging investigation related to submarine R&D procurement Represented multiple companies in bid-rigging cases involving public construction projects, including response to administrative sanctions Represented SI in an unfair inter-affiliate support case Responded to written fact-finding inquiries regarding subcontracting practices by regulatory authorities Reviewed and advised corporate antitrust compliance programs for major conglomerates Conducted mock dawn raid simulations for multinational corporations Advised multinational corporations on compliance under Korean franchise law Handled a broad range of fair trade matters involving unfair trade practices, franchise laws, subcontracting laws, distribution laws, and fair advertising laws LOAD MORE Education

2021	Georgetown University School of Law (LL.M.)
2012	Seoul National University, School of Law (J.D.)
2009	Seoul National University, Graduate School (LL.M.)
2007	Seoul National University, College of Law (LL.B.)

LOAD MORE Work Experience

2012-Present	Lee & Ko
2022	Wilson Sonsini Goodrich & Rosati, Foreign Attorney
2007-2009	Seoul National University Public Interest & Legal Clinic Center, Researcher

LOAD MORE Admissions & Qualifications

2012	Admitted to the Korean Bar

LOAD MORE Languages

Korean and English

Awards & Recognitions

2025	Rising Star, Legal Times
2025	Leading Associates, Legal 500
2024	South Korea’s Lawyer of the Year, Asialaw Awards
2024-2025	Rising Star, Asialaw
2024	Stand-out Lawyer, Thomson Reuters
2023	Best Lawyer (Antitrust & Competition), Korea Economic Daily

LOAD MORE Publications / Presentations / ETC Antitrust and Labor Issues Around the World: A Comparative Analysis (Antitrust, Vol. 36, No 3, Summer 2022. 2022 by the American Bar Association) LOAD MORE Related news

Awards Ranking

Lee & Ko Recognized as Top Law Firm in All 24 Categories by ‘Asialaw Profiles 2025’ 2025.10.22

Press & Releases

[E-daily] Lee & Ko Honored with Most Awards among South Korean Law Firms including ‘Asia Firm of the Year’ 2024.10.04

Awards Ranking

Lee & Ko Awarded in 9 Areas including Asia Firm of the Year and South Korea Firm of the Year in the 'Asialaw Awards 2024' 2024.10.02

Awards Ranking

9 Lee & Ko Lawyers Nominated as Thomson Reuters “Stand-out Lawyers 2024” 2024.03.13

Press & Releases

[Hankyung Business] 2023 Best Law Firms & Lawyers in Korea 2023.12.18

Deals & Cases

Lee & Ko’s Antitrust and Competition Practice Group conducts mock dawn raid on multinational corporate group 2023.11.15

Deals & Cases

Aurelius Group Acquires Shares in LSG Sky Chefs Korea Co., Ltd. 2023.10.30 LOAD MORE LIST

Jeong Yoon CHOI Partner TEL +82-2-772-4283 E-MAIL [email protected]

Jeong Yoon CHOI is a Partner in the Antitrust & Competition Group. Her practice encompasses a broad range of antitrust and competition matters, including abuse of market dominance, merger control, international and domestic cartels, unfair trade practices, and unfair inter- affiliate transactions. She also advises on matters involving subcontracting, franchising, distribution and consumer protection laws. Ms. Choi regularly provides strategic counsel on antitrust compliance, responds to Korea Fair Trade Commission (KFTC) investigations, handles mediation and administrative proceedings, and represents clients in antitrust-related litigation and criminal investigations. With deep experience in cross-border and domestic merger filings, cartel defense, and antitrust compliance programs, Ms. Choi is a trusted advisor to multinational corporations and major Korean conglomerates. She has conducted mock dawn raids, reviewed compliance frameworks, and advised on internal audits and risk mitigation strategies. In addition to her legal practice, Ms. Choi has been active in professional outreach. She served as a guest lecturer on leniency applications at the “2019 International Training Workshop for Competition Authority Officials from Developing Countries,” organized by the KFTC’s International Cooperation Division. Ms. Choi’s work has earned recognition from leading legal directories and industry publications. She has been named a ‘Rising Star’ by Asialaw, a ‘Leading Associate’ by The Legal 500, a ‘2025 Rising Star’ by Legal Times, a ‘Best Lawyer (Antitrust & Competition)’ by Korea Economic Daily, a 'Stand-out Lawyer' by Thomson Reuters, and was awared ‘Lawyer of the Year’ for South Korea at the 2024 Asialaw Awards.

Education

2021	Georgetown University School of Law (LL.M.)
2012	Seoul National University, School of Law (J.D.)
2009	Seoul National University, Graduate School (LL.M.)
2007	Seoul National University, College of Law (LL.B.)

Work Experience

2012-Present	Lee & Ko
2022	Wilson Sonsini Goodrich & Rosati, Foreign Attorney
2007-2009	Seoul National University Public Interest & Legal Clinic Center, Researcher

Expertise

Antitrust & Competition

Corporate

Antitrust Litigation

Mergers & Acquisitions

Admissions & Qualifications

Admitted to the Korean Bar(2012)

Languages

Korean and English

Representative Cases

• Prepared merger filing for GE’s acquisition of Alstom’s power and grid businesses

• Prepared merger filing for Lenovo’s acquisition of IBM’s server business

• Prepared merger filing for AMEC’s share purchase in Foster Wheeler

• Prepared merger filing for Qatar Sovereign Investment Fund’s acquisition of American Express Co.’s business-travel division

• Prepared merger filing for Aurelius Group’s share acquisition of LSG Sky Chefs Korea Co., Ltd.

• Prepared merger filing for LG Group’s acquisition of ZKW Group

• Advised an interested third party in connection with Applied Materials’ proposed acquisition of Tokyo Electric

• Represented international auto parts companies in the KFTC investigations into alternators, ignition coils, and starters

• Represented international auto parts companies in administrative appeals to cancel administrative fines and penalties for auto parts cartels involving alternators and ignition coils

• Successfully represented Hanhwa Systems in an administrative lawsuit against the rejection of the company’s leniency application

• Represented domestic and foreign shipping liners in KFTC investigations into collusion on freight rates

• Represented an international capacitor company in the international capacitor cartel case

• Represented an international shipping liner in the roll-on roll-off cartel investigation

• Represented an international company in the export motorcycle cartel investigation

• Represented a defense contractor in a bid-rigging investigation related to submarine R&D procurement

• Represented multiple companies in bid-rigging cases involving public construction projects, including response to administrative sanctions

• Represented SI in an unfair inter-affiliate support case

• Responded to written fact-finding inquiries regarding subcontracting practices by regulatory authorities

• Reviewed and advised corporate antitrust compliance programs for major conglomerates

• Conducted mock dawn raid simulations for multinational corporations

• Advised multinational corporations on compliance under Korean franchise law

• Handled a broad range of fair trade matters involving unfair trade practices, franchise laws, subcontracting laws, distribution laws, and fair advertising laws

Awards & Recognitions

2025	Rising Star, Legal Times
2025	Leading Associates, Legal 500
2024	South Korea’s Lawyer of the Year, Asialaw Awards
2024-2025	Rising Star, Asialaw
2024	Stand-out Lawyer, Thomson Reuters
2023	Best Lawyer (Antitrust & Competition), Korea Economic Daily

Publications / Presentations / ETC

• Antitrust and Labor Issues Around the World: A Comparative Analysis (Antitrust, Vol. 36, No 3, Summer 2022. 2022 by the American Bar Association)

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Tel. +82-2-772-4000

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