Ribo launches Hong Kong IPO Amid Optimism For siRNA Therapies

Benzinga_recent_news01-02

The small nucleic acid drugs developer has positioned itself as a leader in siRNA therapeutics, boasting one of the world's largest pipelines of drugs using the technology Key Takeaways: Ribonucleic ...

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Ribonucleic acid, or RNA, has emerged as a hot new field after mRNA and miRNA discoveries won Nobel Prizes in 2023 and 2024, respectively, drawing attention to its scientific value and industrial potential. In the medical field, RNA-based small nucleic acid drugs, by virtue of their broad target selection scope, higher clinical success rates, and durable effects, are poised to become leaders driving a third wave of highly targeted new drugs, following small-molecule drugs and antibody therapeutics. Against that backdrop, international investors will soon have a chance to buy into China's leading company within the small nucleic acid drugs sector.Suzhou Ribo Life Science Co. Ltd., with 18 years of experience in small nucleic acid drugs, is launching its IPO in Hong Kong, positioning itself as a world leading player f","collect":0,"end_time":0,"defaultTopTitle":"benzinga.com","property":[],"viewcount":null,"language":"en","relate_stocks":{"LU0963586101.USD":"ALLIANZ GLOBAL SMALL CAP EQUITY \"AT\" ACC","BK4504":"桥水持仓","FXI":"中国大盘股ETF-iShares","BK4588":"碎股","BK4585":"ETF&股票定投概念"},"translate_title":"瑞博在对siRNA疗法的乐观情绪下启动香港IPO","themeId":null,"isJumpTheme":false,"ttsUrl":null,"symbols_score_info":{"FXI":1},"content_text":"The small nucleic acid drugs developer has positioned itself as a leader in siRNA therapeutics, boasting one of the world's largest pipelines of drugs using the technology\nKey Takeaways:\nRibonucleic acid, or RNA, has emerged as a hot new field after mRNA and miRNA discoveries won Nobel Prizes in 2023 and 2024, respectively, drawing attention to its scientific value and industrial potential. In the medical field, RNA-based small nucleic acid drugs, by virtue of their broad target selection scope, higher clinical success rates, and durable effects, are poised to become leaders driving a third wave of highly targeted new drugs, following small-molecule drugs and antibody therapeutics. Against that backdrop, international investors will soon have a chance to buy into China's leading company within the small nucleic acid drugs sector.\nSuzhou Ribo Life Science Co. Ltd., with 18 years of experience in small nucleic acid drugs, is launching its IPO in Hong Kong, positioning itself as a world leading player focused on small interfering RNA therapeutics, or siRNA.\nAfter passing its listing hearing last month, the company officially launched its Hong Kong IPO on Dec. 31, aiming to raise about HK$1.59 billion ($205 million) by selling 27.5 million shares for HK$57.97 each. Heavyweight underwriters CICC and Citigroup are joint sponsors, signaling strong interest from both domestic Chinese and international investors.\nA subscription period for the shares will run through Jan. 6 with a trading debut scheduled for Jan 9.\nFounded in 2007, Ribo has long focused on small nucleic acid drug development, especially for siRNA therapeutics, giving it one of the world's largest siRNA drug pipelines. The company currently has seven self-developed drug assets in the clinical trial stages, targeting seven indications across cardiovascular, metabolic, kidney and liver diseases. Among these, four are in Phase Two clinical trials, with more than 20 preclinical projects in its pipeline.\nFirst siRNA drug for thrombotic diseasesAmong its assets, one of the most advanced is RBD4059, Ribo's core product, which is the world's first siRNA drug for treating thrombotic diseases and is also one of the most advanced siRNA therapeutics globally. Patient enrollment for the drug's Phase 2a clinical trial has been completed, and Phase 2b trials are expected to commence in 2026 to explore the potential for additional indications. Current anticoagulant therapies for thrombosis carry significant risks of severe bleeding in patients. RBD4059 reduces this risk, achieving long-acting anticoagulation by targeting coagulation Factor XI (FXI). By combining the advantages of FXI targeting with siRNA drug technology, the drug also maintains potent efficacy while demonstrating a markedly improved safety profile.\nNotably, just in November, global pharma giant Bayer (BAYN.DE) announced Phase Three clinical results for its own FXIa inhibitor, the oral drug Asundexian. Its data showed a significant reduction in the risk of recurrent ischemic stroke without increasing the risk of major bleeding. That outcome validates both the clinical viability and safety profile of the FXI target, providing companies like Ribo, which are developing therapies based on the same mechanism and with an apparently more favorable siRNA-specific drug profile, with a clear clinical and commercial pathway forward.\nAnother Ribo core product, RBD5044, is the world's second APOC3-targeting siRNA drug to enter clinical development, also displaying \"best-in-class\" potential for treatment of hypertriglyceridemia (HTG).\nIn November, the U.S. Food and Drug Administration (FDA) approved Plozasiran, another siRNA drug targeting the same APOC3 pathway developed by U.S.-based Arrowhead Pharmaceuticals (ARWR.US), for treatment of familial chylomicronemia syndrome (FCS), a rare condition characterized by recurrent pancreatitis. Phase Three data showed APOC3 could reduce triglyceride levels by up to 80% with a dosing frequency of just once every three months. Such strong results not only validate the clinical value of the APOC3 target but also underscore the long-acting advantage of siRNA therapeutics in managing chronic diseases.\nRibo's RBD5044 is now in Phase Two clinical trials, with the drug targeting a lipid-lowering drug market worth more than an estimated $10 billion.\nIn addition to its Chinese R&D and manufacturing centers in Beijing and Suzhou, Ribo also set up a subsidiary, Ribocure AB, in Sweden in 2022 to engage in research activities. That move gives the company an international clinical trial base in Sweden, at the heart of the lucrative European drug market.\nThe Ribocure Clinic in the city of Mölndal is focused on Phase Two clinical trials in cardiovascular, liver, pulmonary, renal, and other disease areas. Ribocure AB currently manages all of Ribo's clinical research in Europe, with the capacity to enroll over 100 patients. This model of \"China discovery and development + Europe clinical development and registration\" lays the foundation for future simultaneous approval and commercialization of the company's products in major global markets including China and Europe.\nRibo is also among a small group of global companies possessing self-developed and clinically validated GalNAc delivery technology, which uses N-Acetylgalactosamine, a sugar molecule often employed as a \"guided warhead\" for liver-targeted delivery in siRNA therapeutics. Its full-technology-chain capabilities in small nucleic acid drug development have also gained recognition from industry peers both domestically and internationally.\nIn December 2023, Ribo entered into a collaboration with Qilu Pharmaceutical, granting it rights to develop, manufacture, and commercialize its RBD7022 high cholesterol drug in Mainland China, Hong Kong and Macao. That same month, it signed an agreement with Germany's Boehringer Ingelheim to co-develop innovative small nucleic acid therapies to treat NASH/MASH liver disease, in a collaboration that could be worth up to $2 billion.\nBy June 2025, Ribo had completed nine funding rounds, with investors including prominent institutions such as SDICFund, Legend Star, Panlin Qianyuan, CICC Capital and Hillhouse Capital. The company's valuation reached 5.02 billion yuan ($715 million) following its latest funding round in June 2025, reflecting its strong potential.\nRibo's revenue has also grown steadily as it signs collaboration agreements concurrent with clinical advances for its products. The figure rose from nearly nil in 2023 to 143 million yuan in 2024 and 104 million yuan in the first half of 2025. The company's loss in the first half of 2025 narrowed to 97.8 million yuan from 142 million yuan in the year-ago period.\nAs the global small nucleic acid drug market continues to experience strong growth, Ribo, with its full-technology-chain platform and extensive product pipeline, looks poised to secure a leading position in this greenfield market. That could warrant attention from long-term investors looking for a slice of the growing global market for a new generation of highly targeted cutting-edge drugs.\nBenzinga Disclaimer: This article is from an unpaid external contributor. 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