Aculys
AcquiredAculys Pharma, Inc.
Tokyo, Japan · Founded 2021 · $114.0M raised
- Headquarters
- Tokyo
- Founded
- 2021
- Business Model
- B2B
- Website
- aculys.com
- Total Funding
- $114.0M
- Last Round
- $30.0M Series CMar 2025
- Rounds
- 3
- Acquisition Date
- Oct 2025
About
Aculys Pharma is a clinical-stage biopharmaceutical company headquartered in Tokyo that works to eliminate Japan's 'drug lag' and 'drug loss' by licensing and commercializing innovative neurology treatments already approved abroad. Its pipeline includes pitolisant (licensed from France's Bioprojet) for narcolepsy and obstructive sleep apnea, and a diazepam nasal spray (Spydia) for epileptic seizures licensed from US-based Neurelis. The company was acquired by Viatris in October 2025.
Summary
Aculys is a Biotech company based in Tokyo, Japan, founded in 2021. It has raised $114.0M in total across 3 rounds, most recently a $30.0M Series C round in Mar 2025. Investors include SoftBank, Catalys Pacific and HBM Healthcare Investments.
Tech & App Stack
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Funding History
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Oct 2025
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Series A through Acquisition — per-round amounts, valuations, and who invested in each round.
Investors
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