Yoon & Yang LLC > Seoul, South Korea > Firm Profile

Yoon & Yang LLC > The Legal 500 Rankings

South Korea > Antitrust and competition: local firms Tier 2

Praised for its ‘creative and practical advice on complex issues’, Yoon & Yang LLC are well positioned to handle antitrust cases encompassing abuse of market dominance, cartels, mergers, and unfair business practices. Hoil Yoon and Sang Oh Jeon lead the team, while the latter is well-versed in matters concerning alleged violations of the Fair Transactions in Subcontracting Act, while Suakbuam Hong is equipped to handle cases involving cartels. Soomin Kim is highlighted for her handling of unfair support practice mandates. Chul Ho Kim is frequently instructed by major Korean companies such as Samsung and Korean Air. Song Ryu  departed the practice in summer 2023.

South Korea > Capital markets: local firms Tier 2

Yoon & Yang LLC is noted for its expertise in debt and equity capital markets, particularly the multi-jurisdictional issuances of high-value bonds. Hyun Suk Jung is a key team member, while Sung Woon Kang specialises in IPOs for both domestic and foreign clients, as well as establishment and investment of foreign funds. Associate Bora Kang works on collective investments, market regulations, and private equity matters. Other key contacts in the group include Young Ho Kang and senior associate Chan Me Song.

South Korea > Dispute resolution: local firms Tier 2

Housing a range of litigation specialists, the team at Yoon & Yang LLC is led by a consortium of experienced partners including Seung Ryong Yoo, who heads the firm’s corporate litigation offering, Kyung In Jung, who focuses on construction litigation, and Youbum Kim, Keon Joo Cho, as well as Sun Bong Lee who head the firm's corporate criminal litigation practice. The team continues to be a popular choice for major Korean conglomerates in domestic and cross-border civil and criminal litigations, alongside a broad range of commercial matters. Elsewhere, former judge Sue Yeon Woo is another key contact in the group.

South Korea > Labour and employment: local firms Tier 2

With strength and depth in contentious and non-contentious employment matters, Yoon & Yang LLC‘s team advises foreign and domestic clients on restructurings, health and safety matters, cases of alleged discrimination, industrial accident claims, wage cases and the employment aspects of M&A mandates. Tae Hwan Oh is a key name for employment litigation. Chan-Keun Park and Seong Hong are names to note in the department.

South Korea > TMT: local firms Tier 2

Yoon & Yang LLC’s recently expanded new technology practice group oversees traditional regulatory issues concerning broadcasting and telecoms as well as newly generated issues concerning privacy and data protection. The team is led by Kwang-Wook Lee who focuses on matters concerning new technologies including AI, fintech, and IoT. Keun Woo Lee ’s main practice areas include privacy protection, trade secrets protections in e-commerce and technology, and IP protection. Sugyoung Yi’s expertise includes broadcasting and information & communication. The team welcomed former prosecutor Geonyoung Koh in March 2023.

South Korea > Banking and finance: local firms Tier 3

Known for its depth of experience across the full range of banking and finance work, Yoon & Yang LLC has a strong focus on the aviation industry. Hyun Suk Jung focuses on financing deals, structuring transactions and advisory work, while Chang Wook Shin handles loan extensions and real estate development. Hye Kyung Helen Sohn, who is highly experienced in aircraft financing and operational leases, joined the team in 2022 from Lee & Ko. Another key team member is Eun Chul Choi.

South Korea > Corporate and M&A: local firms Tier 3

Continuing to be active in Korea’s energy, technology, and aviation industries, Yoon & Yang LLC‘s team handles a full range of multijurisdictional commercial and corporate financing work. Sung-Jin Kim provides crucial support through every step of M&A transactions. Particularly noted for advising on domestic and overseas investment, Sangman Kim also handles joint venture establishment and rehabilitation of various financial institutions. Ki Man Park is recommended for legal advice on private equity investment and managing boardroom disagreements. Young Ho Kang is also highlighted.

South Korea > Insurance: local firms Tier 3

The insurance team at Yoon & Yang LLC fields expertise in advising on insurance matters involving regulatory issues, as well as licensing mandates and contentious work. Cross-border insurance litigation and arbitration is prominent in the department’s workload, with the practitioners acting for Korean and international insurers in this space. Chongsu Seo stands out as ‘excellent‘ in marine insurance work. Other key members of the team include Hyun Suk Jung, Hwang Lim Jang, and Hwan Jun Heo.

South Korea > Intellectual property: local firms Tier 3

Led by Dongju Kwon, the IP practice group at Yoon & Yang LLC frequently handles matters concerning patents, copyright, trademark disputes, trade secrets, and infringement cases. The practice has been strengthened by the arrival of Geonyoung Koh and Kyu Woong Cho, both of whom joined in early 2023 from the Suwon District Prosecutors' Office. Other notable members of the team include Changkwon Kim, Chang Woo Lee, and Sejung Lee.

South Korea > International arbitration Tier 3

Yoon & Yang LLC’s experienced team handle a broad range of international arbitration matters, with a particular focus on construction, commodities, and intellectual property. The team also handles complex and high-value matters within trading sand insurance. Senior foreign attorney Sam Kim is dual qualified in New York and in Seoul and an expert in energy construction projects, while Junsang Lee advises on investigations in the aerospace industry. Arriving from the Doha office of Pinsent Masons LLP, international construction and arbitration expert Joseph Lee is further bolstering the office from September 2023. California-qualified senior foreign attorney Myung-Ahn Kim is another key team member.

South Korea > Real estate: local firms Tier 3

Yoon & Yang LLC‘s ‘highly dedicated‘ real estate practice is noted for its transactional capability, and handles a broad range of asset management and REIT-related matters. With extensive experience in cross-border investments and social overhead capital projects, Young Woo Park jointly leads the team alongside Hwan Jun Heo. Regulatory specialist Jae Ryun Cho advises on real estate M&A, while finance expert Eun Chul Choi and Chang Wook Shin work on multinational project financings, private equity matters, and real estate trust issues. Hyun Suk Jung is another key team member.

South Korea > Regulatory: compliance and investigations: local firms Tier 3

Yoon & Yang LLC‘s white collar crime practice is renowned for its litigation expertise, and boasts major financial institutions and corporate conglomerates as clients. The practice is led by criminal law specialist Sun Bong Lee, who has experience in criminal allegations and investigations into medical malpractice. Former prosecutors Dong Gyu Lee and Hee Sik Yoon focus on criminal financial sector violations and trade secret disclosures within the industrial, banking, and energy industries.

South Korea > Tax: local firms Tier 3

Yoon & Yang LLC’s tax practice handles a broad range of matters, including compliance, audits and international taxation, in addition to litigation and disputes. Experienced litigator Jae Woong Jeong leads the team and Wankyu Jeon litigates general administrative matters. Jung Yeol Lee’s practice focuses on customs disputes and advisory work, while associate Young Woong Park focuses on cross-border M&A, and overseas tax planning and strategy mandates.

South Korea > Projects and energy: local firms Tier 4

Yoon & Yang LLC regularly assists domestic and international clients with project investments, merger control clearances, and share issuances. Team leader Soongki Yi handles traditional and renewable energy mandates, bolstering the strength of the team with expertise in multi-jurisdictional M&A and corporate financing. Young Woo Park focuses on matters concerning project financing, while Dae Sagong has experience in the renewable energy arena, focusing on wind farm and solar power projects.

South Korea > Shipping: local firms Tier 4

Yoon & Yang LLC‘s practice group provides a full range of legal advisory and dispute settlement services relating to all types of maritime disputes and transactions for domestic and foreign clients. Shipping dispute resolutions specialist Sang-Pil Lee leads the team, while Hae-Wang Jeong has a special focus on maritime insurance matters.