Shionogi to buy out Apnimed stake in JV

25 March 2026

US clinical-stage firm Apnimed, which is developing an oral drug product candidate, AD109, that is designed to address a root cause of obstructive sleep apnea (OSA), has announced that Japan’s Shionogi (TYO: 4507) have entered into a definitive agreement for Shionogi to acquire Apnimed's 50% ownership of Shionogi-Apnimed Sleep Science (SASS).

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