三生国健专利狙击麦济生物，估值26亿的IPO之路暗藏三重风险

Core Viewpoint - The patent dispute between Sanofi and Maij Biotechnology over the IL-4R antibody has intensified, with Sanofi applying to declare Maij's core patent invalid, which poses significant challenges for Maij as it approaches its IPO [1][2]. Group 1: Patent Dispute - The conflict began with personnel changes, as former Sanofi employees founded Maij Biotechnology and filed for IL-4R antibody patents shortly after [1]. - A court ruling in 2020 determined that the patent rights belonged to Sanofi, based on evidence of similar research proposals and experimental data from 2015 [1]. - If Sanofi's recent application to invalidate Maij's patent is successful, Maij could lose its intellectual property protection for its core product, MG-K10 [1][2]. Group 2: Financial Difficulties - Maij Biotechnology has not yet launched any products, with revenue plummeting from 8.72 million yuan in 2023 to zero in the first quarter of 2025, resulting in cumulative losses of 460 million yuan [1]. - The company's debt structure is alarming, with a debt ratio nearing 700% by the end of 2023 and still at 166.83% in March 2025, leading to negative net assets [1][2]. Group 3: Market Competition - Even if MG-K10 is successfully launched, Maij will face fierce competition in the IL-4Rα target market, which is already crowded with major players [2]. - Competitors like Sanofi and Regeneron have significant sales figures, with Dupilumab exceeding 10 billion euros, and other companies have already secured multiple indications for their products [2]. - The IL-4Rα market is expected to undergo a reshuffle between 2026 and 2027, presenting challenges such as price wars and insufficient indication coverage for Maij's MG-K10 [2][3]. Conclusion - The combination of patent disputes, financial pressures, and market competition presents significant obstacles for Maij Biotechnology's IPO journey, while Sanofi continues to strengthen its position through stable revenue and partnerships [3].