
Fielding experts with experience at the KFTC, Yoon & Yang LLC is sought out for representation in cases involving abuse of market dominance, cartels, mergers, resale price maintenance and unfair business practices. The practice group is led by Sang Oh Jeon, who offers a wealth of experience to Korean conglomerates and multinational corporations on responding to KFTC investigations. Chul Ho Kim is recommended for his expertise across a broad practice, ranging from cartels to internal trading. SB(Suakbuam) Hong represents clients in relation to issues under the Fair Trade Act, and Chang-Mo An is also a key practitioner in the group. Keum Seok Oh and Yeong Ho Shin joined the team in September 2025.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Billing & efficiency
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
‘Great lawyering and bridging the culture and language gap for international clients like us.’
Key clients
- Microsoft
- Qualcomm
Work highlights
Represented Hyundai Steel in the case regarding alleged unlawful collusive conduct related to scrap metal prices.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Practice head
Sang Oh Jeon
Other key lawyers
Chul Ho Kim; SB(Suakbuam) Hong; Chang-Mo An; Keum Seok Oh; Yeong Ho Shin
