Dec 30, 2025

  • Corporate

[Update on Disclosed Matter] Notice Concerning Completion of Making Renalys Pharma, Inc. a Wholly-Owned Subsidiary and an Absorption-Type Merger

Name of listed company: Chugai Pharmaceutical Co., Ltd.
Code number: 4519 (Prime Market of Tokyo Stock Exchange)
Head office: 1-1, Nihonbashi-Muromachi 2-Chome, Chuo-ku, Tokyo
President & CEO: Osamu Okuda
Inquiries to: Kae Miyata
Head of Corporate Communications Dept.
Tel:
For media:+81-(0)3-3273-0881
For investors:+81-(0)3-3273-0554

TOKYO, December 30, 2025 -- Chugai Pharmaceutical Co., Ltd. made Renalys Pharma, Inc. a wholly-owned subsidiary on November 27, 2025, as previously announced in the news release titled “Notice of Absorption-Type Merger of a Wholly-Owned Subsidiary, Renalys Pharma, Inc.” issued on November 18, 2025. Following this, Chugai announced that the absorption-type merger, with Chugai as the surviving company and Renalys Pharma, Inc. as the dissolving company, was completed on December 30, 2025.

[Reference]
Notice of Absorption-Type Merger of a Wholly-Owned Subsidiary, Renalys Pharma, Inc. (News release issued on November 18, 2025)
https://www.chugai-pharm.co.jp/english/news/detail/20251118173000_1199.html

Contact:

  • For Media
  • Chugai Pharmaceutical Co., Ltd.
  • Media Relations Group, Corporate Communications Dept.,
  • Hideki Sato
  • Tel: +81-3-3273-0881
  • E-mail: pr@chugai-pharm.co.jp
  • For Investors
  • Chugai Pharmaceutical Co., Ltd.
  • Investor Relations Group, Corporate Communications Dept.,
  • Takayuki Sakurai
  • Tel: +81-3-3273-0554
  • E-mail: ir@chugai-pharm.co.jp