Add-on Acquisition • Life Science

Viatris Acquires Aculys Pharma

On October 15, 2025, Viatris acquired life science company Aculys Pharma from HBM Partners

Acquisition Context
  • This is Viatris’ 11th transaction in the Life Science sector.
  • This is Viatris’ 1st transaction in Japan.

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M&A Deal Summary

Date October 15, 2025
Target Aculys Pharma
Sector Life Science
Buyer(s) Viatris
Sellers(s) HBM Partners
Deal Type Add-on Acquisition

Target Company

Aculys Pharma

Minato-ku, Japan
Aculys Pharma is a biopharmaceutical company focused on the development and commercialization of innovations in the fields of neurology and psychiatry. Aculys Pharma was founded in 2021 and is based in Minato-ku, Japan.
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Buyer Overview 1

Buyer

Viatris

Canonsburg, Pennsylvania, United States

Category Company
Founded 1961
Sector Life Science
Employees32,000
Revenue 14.7B USD (2024)
DESCRIPTION

Viatris is a generic and specialty pharmaceutical company. Viatris offers the industry's broadest and highest quality product portfolios, a robust product pipeline, and a global commercial footprint through operations in more than 90 countries. Viatris was founded in 1961 and is based in Canonsburg, Pennsylvania.


Deal Context for Buyer #
Overall 14 of 14
Sector: Life Science 11 of 11
Type: Add-on Acquisition 5 of 5
Country: Japan 1 of 1
Year: 2025 1 of 1
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2024-11-18 Viatris - Unit Dose Laboratories

Canonsburg, Pennsylvania, United States

Viatris' Unit Dose Laboratories provides unit-dose generic medicines to institutional and long-term care facilities. Viatris' Unit Dose Laboratories was founded in 1980 and is based in Canonsburg, Pennsylvania.

Sell -

Seller Profile 1

SELLER

HBM Partners

Investor Investor Investor Investor Investor


Category Private Equity Firm
Founded 2001
PE ASSETS 2.1B USD
Size Large
Type Sector Focused
DESCRIPTION

HBM Partners is a private investment firm focused on investing in entrepreneurial biopharma and other healthcare-related companies in Europe, North America, India and other Emerging Markets. HBM looks to invest $5 to $50 million per transaction and will consider private and public companies. HBM Partners was established in 2001 and is headquartered in Zug, Switzerland.


Deal Context for Seller #
Overall 39 of 40
Sector: Life Science 35 of 35
Type: Add-on Acquisition 7 of 7
Country: Japan 1 of 1
Year: 2025 2 of 3
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2025-03-21 Visen Pharma

Shanghai, China

Visen Pharma is a biopharmaceutical company focused on endocrine-related treatments. It is committed to providing more humane and innovative therapies to enable endocrine patients to enjoy better treatment processes and efficacy, achieving their desired lives. Visen Pharma was founded in 2018 and is based in Shanghai, China.

Sell -
FOLLOWING DEAL
DATE TARGET DEAL TYPE VALUE
2025-12-15 Swixx Biopharma

Baar, Switzerland

Swixx BioPharma is a specialized distributor of rare diseases, Rx and OTC medicinal products in Central & Eastern Europe, and acts as a true commercialization partner for Biotech & Pharma companies in this area. Swixx Biopharma was founded in 2014 and is based in Baar, Switzerland.

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