Core Viewpoint - A patent dispute between two leading Chinese biopharmaceutical companies, Heptares Therapeutics-B and Baiaosaitu-B, has emerged, impacting their market valuations and highlighting the significance of their antibody technology platforms [2][4]. Company Overview - Heptares Therapeutics, based in Shanghai, is known as the "King of BD" in China, providing drug development and antibody technology to global pharmaceutical companies [2]. - Baiaosaitu, located in Beijing, is referred to as the "Mouse King" and specializes in providing transgenic mice for drug testing [2]. Patent Dispute Details - The core of the dispute revolves around a technology for producing antibody drugs, which is crucial for the revenue and cash flow of both companies [2]. - Heptares acquired its technology from a Dutch company in 2016, receiving patent authorization in 2022 after a lengthy legal battle with the Chinese National Intellectual Property Administration [3][10]. - Baiaosaitu developed its technology internally over a decade, claiming it could reach Heptares' level in just three months [3]. Legal Proceedings - Heptares filed a lawsuit against Baiaosaitu in September 2024, alleging patent infringement, while Baiaosaitu challenged the jurisdiction and sought to invalidate Heptares' patent [3][4]. - In mid-2025, Baiaosaitu's counteractions were unsuccessful, with the Supreme Court affirming the jurisdiction of the Shanghai Intellectual Property Court and the validity of Heptares' patent [4]. Financial Performance - Heptares secured a significant contract worth up to $620 million, with $47 million in upfront payments, and has generated $185 million in revenue from licensing its technology from 2020 to 2024 [5][6]. - Baiaosaitu's antibody business revenue reached 318 million yuan in 2024, marking an over 80% year-on-year growth, with partnerships established with seven of the top ten global pharmaceutical companies [8]. Technology Comparison - The dispute has sparked discussions among investors regarding the superiority of the two companies' platforms, with some favoring Baiaosaitu's technology as more advanced [7][14]. - Baiaosaitu's platform utilizes a method that incorporates over 120 human V genes, while Heptares' platform only integrates nine, leading to claims of a technological edge [13][14]. Market Impact - Following the public disclosure of the patent dispute, Heptares' stock price fell by 15.47% as investors reacted to the perceived advantages of Baiaosaitu's technology [14].