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主な業務分野
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Yi Jun Chang is a partner at Lee & Ko, specializing in M&A, Corporate Governance, Corporate Restructuring, and General Corporate Matters.

Since joining Lee & Ko in 2013, he has advised on a broad range of complex corporate transactions and reorganizations involving mergers, spin-offs, comprehensive share exchanges, business and asset transfers, and share transfers, particularly in the context of intra-group restructurings by large business groups.

Mr. Chang also has extensive expertise in corporate control disputes, including hostile M&As and related litigation, shareholder meeting and board resolution challenges, and minority shareholder rights enforcement. He is recognized for developing creative offensive and defensive legal strategies in these highly sensitive and contentious matters.

Prior to joining Lee & Ko, Mr. Chang served as a Judge Advocate Officer in the Republic of Korea Navy.
主要事例
[Restructuring Transactions]
Governance structure improvement via share purchase for DK Dongshin (2024)
Group restructuring of Danfoss Korea (2023 ~ 2024)
Liquidation of Shinhan AI (2024)
Merger of GIIR, HS Ad, and Elbest (2023)
Group restructuring of Mico Group (2023)
Business integration between Shinsegae Central City and Shinsegae Yeongrangho Resort (2023)
Spin off of DSEC (2022)
Spin off of Etoos (2022)
Establishment of a joint venture between HMM and LGL (2022)
Establishment of SeAH Besteel Holdings through spin off (2022)
Governance restructuring of Shinhan Credit Information (2022)
TYM-International Machinery Merger (2022)
Governance restructuring of Digital Optics (2021)
Spin off of IT Business Sector from SeAH Networks (2021)
Spin off of Daerim Industrial (2020)
Merger between Naver Webtoon and Webtoon Entertainment Korea (2020)
Merger between Samsung Asset Management and Samsung Hedge Asset Management (2020)
Spin off of Feed & Care Sector from CJ CheilJedang (2019)
Merger between LG Chem Ltd. and LG Life Sciences Ltd.(2017)
Spin-off of Seah Steel Corp. (2017)
Merger between Hyundai HCN Co., Ltd. and its 5 subsidiaries (2016)
Comprehensive exchange of shares between SK Telecom Co., Ltd. and SK Broadband Co., Ltd. (2016)
Business transfer of premium supermarket business in Shinsegae Inc. to Emart Inc. (2016)
Comprehensive exchange of shares between Nano Entek Co., Ltd. and Biofocus Co., Ltd. (2015)
Squeeze-out of minor shareholders in Ko-one energy service Co., Ltd. (2014)
[M&A Transactions]
Issuance of new shares by Jeju Bank to Douzone BizOn (2025)
Spin-off of T-money and investment by Kakao Mobility (2025)
Sale of management rights in Opticore (2024)
Acquisition of Daewoo AP (now DH Autorid) by DH Global (2024)
Sale of management rights in Crystal Genomics (2023)
Business transfer of Daesung Marif (2023)
Acquisition of Hans Korea by LF Food (2023)
Sale of majority shares in December Asset Management (2023)
Investment of Amplify by Samsung Asset Management (2023)
Acquisition of One Call (2022)
Acquisition of YG Plus stake by Big Hit (2021)
Acquisition of Hydraulic business division of Danfoss Group (2021)
Acquisition of Clean-eco (2021)
Sale of management rights in Lab Genomics (2021)
Acquisition of BNX stake by Naver (2021)
Acquisition of Pet Forest stake by Samchully (2021)
Sale of solar energy business division by SeAh networks (2021)
Naver – CJ Group treasury stock swap (2021)
Naver – Shinsegae Group treasury stock swap (2021)
Additional investment in Korea Digital Asset Trust (2020)
Investment in Next & Bio (2020)
Big Hit’s acquisition of Superb (2019)
PEF’s acquisition of Gran-monster and Mecurylike (2019)
Sale of LG-Hitachi Water Solutions and HiEntech by LG Electronics (2019)
Acquisition through the purchase of 100% shares in David Toy Co., Ltd., by CJ E&M Corp. (2017)
Spin-off of CJ E&M Corp. and acquisition of two drama studios by the newly incorporated company (2016)
Acquisition through the purchase of 100% shares in Forza Motors Korea Corp. by Hyosung Corp. (2015)
Acquisition through the purchase of 100% shares in Dongbu Farm Hannong Co., Ltd. by LG Chem Ltd. (2017)
Tryout of purchase of major shares in CJ Hello Vision Co., Ltd. by SK Telecom Co., Ltd. and merger between CJ Hello Vision Co., Ltd. and SK Broadband Co., Ltd. (2016)
Acquisition of the Hanwha Group for defense and chemical industry of the Samsung Group through the share purchase (2016)
Acquisition through the purchase of 100% shares in KT Rental Co., Ltd. by the Lotte Group (2016)
The disposition of LNG transportation business in Hyundai Merchant Marine Co., Ltd. (2015)
[Corporate Control Disputes]
Response to a request for inspection of accounting books of a webtoon platform company (Company T) (2024)
Corporate control dispute of an entertainment agency (Company G) (2024)
Corporate control dispute of a 3D printer developer (Company H) (2023)
Response to Busan Public Housing minority shareholder movement (2022 ~ 2023)
Corporate control dispute of CI Tech (2023)
Corporate control dispute of a library management system developer (Company B) (2023)
Corporate control dispute of a waste disposal developer (Company C) (2023)
Corporate control dispute of SolGent (2021 ~ 2023)
Response to a movement for minority shareholders of Crystal Genomics (2021 ~ 2023)
Response to Injunction to inspect and copy accounting books of a lubricant manufacturer (Company J) (2022)
Lab Genomics minority shareholder movement response (2021)
Response to accounting book inspection and copy request to Blockberry, G&G Enterprise, etc. (2021)
Panacea (formerly Supex B&P) corporate control dispute (2020 ~ 2021)
Corporate control dispute of real estate execution corporation (G Company) (2020)
Corporate control dispute of Tellion (2020)
Corporate control dispute of KMH Dispute (2020)
Corporate control dispute of Jayway
Corporate control dispute of Charmzone (2020) (2019)
Corporate control dispute of Leaders Technology Investment (formerly Gemini Investment)
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学歴
2018 USC Gould School of Law - LL.M.
2010 Judicial Research & Training Institute, Supreme Court of Korea
2004 Seoul National University - LL.B
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経歴
2013-Present Lee & Ko
2010-2013 Judge Advocate Officer, Republic of Korea Navy
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資格/会員
2007 Admitted to the Korean Bar
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言語
English and Korean