South Korea

 Lee & Ko has once again reaffirmed its position as one of Korea’s premier law firms earning six honors including “Korea Deal Firm of the Year” and “Litigation Law Firm of the Year” at the ALB Korea Law Awards 2025, hosted by Asian Legal Business (ALB), a Thomson Reuters affiliate and one of Asia’s most respected legal publications. In the Firm Categories, Lee & Ko was recognized as “Korea Deal Firm of the Year”, “Litigation Law Firm of the Year”, and “Tax & Trusts Law Firm of the Year”, achieving its third consecutive recognition in the litigation category. These accolades highlight the firm’s sustained excellence across dispute resolution, corporate advisory, and tax practices, supported by exceptional teamwork and execution capabilities. In particular, the firm achieved significant victories in cases of broad social and economic importance, including the Pohang Earthquake Damages Appeal, the HSBC Short-Selling Criminal Case, and the SK Chemicals Humidifier Disinfectant Case. Beyond litigation, the firm’s transactional and advisory expertise was also recognized through its work on several landmark matters, such as LG Energy Solution’s acquisition of assets from Ultium Cells LLC, SK’s sale of SK Specialty, and Lotte Group’s VAT dispute, underscoring the firm’s depth of experience and cross-practice capabilities. In the Deal Categories, Lee & Ko earned top honors for its exceptional advisory capabilities in M&A and Capital Markets, winning “Debt Market Deal of the Year” for advising on Hanwha Life Insurance’s Tier II Subordinated Capital Securities, “Equity Market Deal of the Year” for LG Chem, Ltd.’s issuance of exchangeable bonds due 2028, and “M&A Deal of the Year” for Korean Air Lines’ acquisition of Asiana Airlines and sale of Asiana Airlines’ cargo business. The ALB Korea Law Awards celebrate the most outstanding achievements in Korea’s legal market, evaluating law firms and in-house teams based on submitted materials and independent research. These six awards are a testament to Lee & Ko’s unwavering commitment to excellence, innovation, and leadership across all practice areas. The awards won by Lee & Ko are as follows. [Firm Categories] Korea Deal Firm of the Year Litigation Law Firm of the Year Tax and Trusts Law Firm of the Year [Deal Categories] Debt Market Deal of the Year (Hanwha Life Insurance Tier II Subordinated Capital Securities) Equity Market Deal of the Year (LG Chem, Ltd. Issuance of Exchangeable Bonds due 2028) M&A Deal of the Year (Korean Air Lines Acquisition of Asiana Airlines and Sale of Asiana Airlines Cargo Business)  

On November 19, 2021, Company C, a manufacturer of equipment for secondary batteries, filed a lawsuit against Wonik PNE Co., Ltd. (the “Company”), which operates in the same industry. The counterparty alleged that the Company was infringing its patent for a “secondary battery pouch folding device” (the “Subject Patent”) and sought both an injunction and KRW 3 billion in damages. Representing the Company, Lee & Ko argued that the true inventor of the Subject Patent is employee A, and that the Subject Patent amounts to an employee invention that rightfully belongs to the Company. On this basis, Lee & Ko argued that the counterparty’s claim of patent infringement constituted an abuse of patent rights, since the Company was the legitimate patentee. The facts showed that employee A completed the invention while still employed by the Company, but did not disclose it to the Company. Instead, A provided the design drawings to another employee, B. After leaving the Company, B filed for and registered the Subject Patent in his own name, and later transferred it to the counterparty, a company he had established. Lee & Ko persuasively argued that, under these circumstances, the counterparty’s assertion of patent infringement was an abuse of rights. As a result, the Company secured a complete victory at the first instance on October 11, 2024. Although Company C filed an appeal, Lee & Ko, acting on behalf of the Company, initiated a claim against C seeking the transfer of the Subject Patent registration. The courts recognized that the application for the Subject Patent qualified as an “application filed by an unentitled person” and ruled in favor of the Company. The Company secured a complete victory at both the first instance and on appeal before the IP High Court. On June 5, 2025, the Supreme Court dismissed C’s appeal, thereby rendering the final the judgment. Following this decision, C withdrew its own appeal, making the case fully resolved. Lee & Ko’s IP Practice Group conducted a detailed analysis of the technical features of the Subject Patent, the Company’s technical data, as well as related email communications and messenger records. Based on this review, the team successfully proved that the Subject Patent was not B’s personal invention, but rather an employee invention by A, thereby securing a judgment ordering the transfer of the patent rights. Consequently, C’s claims for an injunction and damages for patent infringement were also dismissed. This case highlights Lee & Ko IP’s outstanding litigation capability, demonstrating how thorough technical examination and rigorous legal analysis can lead to a complete victory for the client.

Lee & Ko represented CJ ENM and TVING in the Korea Fair Trade Commission’s (“KFTC”) merger review of a transaction which CJ ENM sought to acquire control of Wavve by having its executives hold concurrent positions at Wavve, based on the premise of a future TVING-Wavve merger. Lee & Ko successfully secured conditional approval with corrective measures that minimize the impact on the business operations of the companies. In this case, the companies had a high market share in the subscription-based OTT market which is focused on pre-produced content. The KFTC, in line with its precedents in the OTT and media sectors, conservatively defined the relevant market in a manner disadvantageous to the companies. However, Lee & Ko utilized its deep understanding of the media sector and extensive experience in merger cases to persuasively present arguments addressing the KFTC’s concerns regarding the potential anticompetitive effects of the transaction. This resulted in the KFTC concluding that the transaction posed no concerns regarding (i) vertical overlap in the content supply and OTT markets and (ii) conglomerate effects between the OTT market and mobile telecommunications retail market. Lee & Ko proactively utilized the voluntary commitment procedure, which was recently introduced in 2024, to propose behavioral remedies that addressed the KFTC’s concerns regarding potential anticompetitive effects and minimize business disruptions to the companies. In close coordination with the KFTC, Lee & Ko effectively demonstrated the effectiveness of the remedies and timely secured the KFTC’s approval of the transaction. According to the KFTC, this case is particularly meaningful as it is the first instance where behavioral remedies were imposed utilizing the newly implemented voluntary commitment procedure.

19 lawyers from Lee & Ko have been selected in the '2025 Korea’s Top 100 Lawyers' researched by Asia Business Law Journal. Yong Seok Ahn and Kyu Wha Lee have also been recognized as one of the most influential lawyers in Korea, being named an “ICON” for their ability to provide valuable insights to the legal community based on their extensive experience. The lists of Korea’s Top Lawyers selected from Lee & Ko are as follows: Banking & Finance: Woo Young Jung, Yeo Kyoon Yoon Capital Markets: Jin Hong Kwon, Hyunjoo Oh Competition/Antitrust: Yong Seok Ahn, Hwan Jeong Corporate/M&A: Sanggon Kim, Ho Joon Moon, Kyu Wha Lee, Hyeong Gun Lee Dispute Resolution: Arbitration: Jinyoung Jung Dispute Resolution: Litigation: Won Seok Ko Employment: Sang Hoon Lee Insurance: Jin Hong Kwon, Jinyoung Jung IP: Jae Hoon Kim, Un Ho Kim Projects & Energy: Hun Ko, Dong Eun Kim Shipping: Jinyoung Jung, Woo Young Jung TMT: Hwan Kyoung Ko, Kwang Bae Park Asia Business Law Journal (ABLJ), an Asian regional law magazine, conducts research on thousands of domestic and foreign in-house counsel as well as lawyers at international law firms to select the Top 100 lawyers in Korea every year.