Overview
Pharmaceutical

Perseus Proteomics Inc.

Perseus Proteomics is a Tokyo University-originated biopharmaceutical venture specializing in the discovery and development of novel antibody therapeutics for cancer and other diseases, leveraging proprietary antibody generation technologies including hybridoma, phage display, and single B-cell screening methods. The company's pipeline targets solid tumors and hematological malignancies, with lead assets licensed to major pharmaceutical partners including Chugai Pharmaceutical. In addition to drug discovery, the company generates revenue through antibody research support services (contract research) and antibody/reagent sales to academic and pharmaceutical clients.

Market Cap
¥2.54B
US$16.2M
EV
¥0.95B
US$6.07M
Stock¥138▼-4.17%
US$1 = ¥156.80 (2026-10-23)
LTM EV/EBITDA
NM
LTM EV/EBIT
NM
LTM PER
NM
LTM PBR
2.2
x
Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-75.1%pt
100
Oct 24, 25 – Oct 23, 26StockTOPIX
MC → EV Bridge
2.54BUS$16.2MMarket Cap0.00BUS$0.00M+ Debt1.59BUS$10.2M− Cash0.00BUS$0.00M− Inv. Sec.0.95BUS$6.07MEV
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Performance & Balance
Revenue 5Y (¥B)
0.07US$0.45M'22/30.09US$0.60M'23/30.10US$0.64M'24/30.12US$0.77M'25/30.14US$0.86M'26/3
EBITDA 5Y (¥B)
-0.47-US$2.99M'22/3-0.69-US$4.41M'23/3-0.89-US$5.68M'24/3-0.82-US$5.25M'25/3-0.74-US$4.74M'26/3
Net Income 5Y (¥B)
-0.60-US$3.82M'22/3-0.79-US$5.01M'23/3-1.10-US$7.04M'24/3-0.90-US$5.77M'25/3-0.72-US$4.58M'26/3
Capital Structure
100%
EquityD/E 0.00xDebt
Liquidity vs Debt 5Y (¥B)▲ Net Cash
CashInv. Sec.Debt
3.21US$20.5M'22/32.44US$15.6M'23/31.54US$9.83M'24/31.67US$10.6M'25/31.52US$9.66M'26/3
Shareholders
Top 10 hold 14.3%
1
Daiwa Securities Co. Ltd.
2.93%
2
SBI SECURITIES Co., Ltd.
2.42%
3
Mitsubishi UFJ Capital Co., Ltd.
1.68%
4
FUJIFILM Corporation
1.39%
5
Rakuten Securities, Inc. (Joint Account)
1.32%
6
MATSUI SECURITIES CO.,LTD.
1.28%
7
Nomura Securities Co., Ltd.
0.96%
8
Keys Japan Co., Ltd.
0.89%
9
Haruki YAMAGUCHI
0.83%
10
Toshiyuki YAMADA
0.59%
Management
8 officers
Takuya YOKOGAWA
Representative Director, President and Executive Officer
Apr 1985 Joined Fuji Photo Film Co., Ltd. (now FUJIFILM Corporation) Oct 1996 Senior Researcher, Ashigara Research Laboratories, FUJIFILM Corporation Apr 2004 General Manager, Research, Digital & Photo Imaging Materials Research Laboratory, Materials Research Division, R&D Management Division, FUJIFILM Corporation Jun 2007 Deputy Director, Life Science Research Laboratory, R&D Management Division, FUJIFILM Corporation; concurrently General Manager, Technology, Business Development Office, Life Science Business Division Jul 2008 Seconded to Toyama Chemical Co., Ltd. (now FUJIFILM Toyama Chemical Co., Ltd.) Jun 2009 Director, Pharmaceutical Research Laboratory, R&D Management Division, FUJIFILM Corporation Sep 2013 Manager, Regenerative Medicine Business Promotion Office, FUJIFILM Corporation; concurrently Deputy General Manager, Pharmaceutical Business Division Jun 2014 Concurrently Director, Japan Tissue Engineering Co., Ltd. Apr 2015 Manager, Regenerative Medicine Business Promotion Office, FUJIFILM Corporation; seconded to Regenerative Medicine Innovation Forum (Chair, Steering Committee) Dec 2017 Manager, Healthcare Business Promotion Office, FUJIFILM Corporation Mar 2018 Director, the Company Jun 2018 Representative Director, President, the Company (current) Jan 2019 Executive Officer, the Company (current)
1960-10-13
Kinichiro KOMINAMI
Director
Jul 1994 Postdoctoral Researcher, Royal Cancer Hospital (Institute of Cancer Research), United Kingdom Sep 1998 Assistant Professor, Institute of Health Biosciences, Kyushu University Jun 2001 Joined Nomura Securities Co., Ltd.; seconded to Nomura Research & Advisory Co., Ltd. Jun 2011 Executive Director, Investment Division, Nomura Research & Advisory Co., Ltd. Apr 2013 Manager, Financial Institutions & Public Interest Corporations Department, Nomura Securities Co., Ltd. Aug 2015 Joined Mizuho Securities Co., Ltd., Group Director, Corporate Group Sep 2017 Representative Director, Tech & Fin Strategy Co., Ltd. (current) Oct 2017 Outside Director, Cellspect Co., Ltd. (current) Jun 2018 Director, the Company (current) Jun 2018 Outside Director, Delta-Fly Pharma, Inc. (current) Aug 2019 Outside Director, Veritas In Silico Inc. (current) Aug 2021 Outside Director, eGaia Inc. (current) Dec 2021 Outside Director, Regenerative Medicine iPS Gateway Center Co., Ltd. (now Reptec Co., Ltd.) (current) Feb 2022 Director, TransMed Co., Ltd. (current)
1967-01-20
Shinji HAGIWARA
Director, Executive Officer, General Manager, R&D Division
Apr 1989 Joined Sandoz Pharmaceuticals K.K. (now Novartis Pharma K.K.) May 2001 Team Leader, Biological Sciences Research Division, GlaxoSmithKline K.K. Feb 2007 Senior Researcher, Pharmaceutical Healthcare Research Laboratory, FUJIFILM Corporation Oct 2013 General Manager, Pharmacology Research Division, Pharmaceutical Healthcare Research Laboratory, FUJIFILM Corporation Nov 2021 General Manager, Business Development Division, concurrently Deputy General Manager, R&D Division, the Company Jun 2022 Executive Officer, General Manager, R&D Division, the Company (current) Jun 2023 Director, the Company (current)
1965-03-23
Susumu TANAHASHI
Director, Executive Officer, General Manager, Administration Division and General Manager, Business Development Division
Apr 1986 Joined Fuji Photo Film Co., Ltd. (now FUJIFILM Corporation) Oct 2001 Senior Staff, Operations Section, Photosensitive Materials Division, Sales Headquarters, FUJIFILM Corporation Feb 2009 Manager, Consumer Sales Headquarters, FUJIFILM Corporation Oct 2010 Assistant General Manager, Imaging Business Division, FUJIFILM Corporation Jan 2011 Assistant General Manager, Corporate Planning Division, FUJIFILM Holdings Corporation Jun 2017 Representative Director, President, FUJIFILM Pharma Co., Ltd. Jun 2019 Representative Director, Executive Vice President, FUJIFILM Toyama Chemical Co., Ltd. Mar 2022 Representative Director, President, PDR Pharma Co., Ltd. Aug 2024 Special Assignment General Manager, President's Office, FUJIFILM Toyama Chemical Co., Ltd. Dec 2025 General Manager, Business Development Division, the Company Apr 2026 Executive Officer, General Manager, Business Development Division; concurrently Deputy General Manager, Administration Division, the Company Jun 2026 Director, Executive Officer, General Manager, Administration Division and General Manager, Business Development Division, the Company (current)
1963-02-13
Nobuo HANAI
Director
Apr 1976 Joined Kyowa Hakko Kogyo Co., Ltd. Feb 2003 President, BioWa, Inc. Jun 2006 Executive Officer, Kyowa Hakko Kogyo Co., Ltd. Oct 2008 Executive Officer, General Manager, Development Division, Kyowa Hakko Kirin Co., Ltd. (now Kyowa Kirin Co., Ltd.) Apr 2009 Managing Executive Officer, General Manager, Development Division, Kyowa Hakko Kirin Co., Ltd. Jun 2009 Director, Managing Executive Officer, Kyowa Hakko Kirin Co., Ltd. Mar 2010 Director, Senior Managing Executive Officer, Kyowa Hakko Kirin Co., Ltd. Mar 2012 Representative Director, President, Kyowa Hakko Kirin Co., Ltd. Mar 2018 Representative Director, Chairman, Kyowa Hakko Kirin Co., Ltd. Mar 2019 Director, Chairman, Kyowa Hakko Kirin Co., Ltd. May 2020 Director, LSI Capital Co., Ltd. Jun 2020 Outside Director, Shimadzu Corporation (current) Mar 2021 Director, the Company (current) Jun 2021 Outside Director, Acurys Pharma Co., Ltd. Oct 2023 Outside Director, Heparis Pharma Co., Ltd. (current) Dec 2023 Outside Director, Renalis Pharma Co., Ltd. Mar 2024 Outside Director, NeuImmune Biotech Co., Ltd. (current) Jun 2025 Director, LYNKS Co., Ltd. (current)
1953-04-30
Takashi OHNO
Director, Audit and Supervisory Committee Member
Mar 1996 Joined Ota Showa Audit Corporation (now EY ShinNihon LLC) Oct 1998 Joined Asahi Audit Corporation (now Azsa LLC) Apr 2000 Registered Certified Public Accountant Apr 2002 Registered Certified Tax Accountant Jan 2006 Joined Ichiyoshi Securities Co., Ltd. Feb 2010 Joined CMIC Co., Ltd. (now CMIC Holdings Co., Ltd.) Oct 2016 Representative, Ohno Certified Public Accountant Office (current) Jun 2021 Director, Audit and Supervisory Committee Member, the Company (current) Jun 2025 Outside Audit & Supervisory Board Member, Workport Co., Ltd. (current)
1969-12-14
Hisashi MATSUMOTO
Director, Audit and Supervisory Committee Member
Apr 1989 Joined The Nippon Credit Bank, Ltd. (now Aozora Bank, Ltd.) Oct 2001 Group Leader, Investment Group 2, Corporate Investment Division, Aozora Bank, Ltd. Oct 2003 Seconded to Aozora Investment Co., Ltd., General Manager, Investment Sales Division 1 May 2007 General Manager, Sales Promotion Division, Aozora Investment Co., Ltd. Oct 2007 Managing Director, Aozora Investment Co., Ltd. Dec 2009 Joined Innovation Engine Co., Ltd.; Investment Partner (current) Jun 2014 Outside Director, Green Peptide Co., Ltd. (now BrightPath Bio Co., Ltd.) Oct 2016 Outside Director, ORTHOREBIRTH Co., Ltd. Dec 2021 Outside Director, Veritas In Silico Inc. Jun 2026 Director, Audit and Supervisory Committee Member, the Company (current)
1962-11-12
Fusako NISHIGAKI
Director, Audit and Supervisory Committee Member
Apr 1982 Joined Fujisawa Pharmaceutical Co., Ltd. (now Astellas Pharma Inc.) Apr 2005 Chief Researcher, Pharmacology Research Laboratories, Research Division, Astellas Pharma Inc. Apr 2014 Chief Researcher, Regenerative Medicine Research Laboratories, Research Division, Astellas Pharma Inc. Apr 2014 Vice Chair, Operations Committee, Regenerative Medicine Innovation Forum (FIRM) Apr 2014 Member, Consortium Council for Regenerative Medicine Human Resources Development, Ministry of Education, Culture, Sports, Science and Technology Oct 2017 Chair, International Committee, FIRM Oct 2019 Manager/Expert, Research Division, Healios Co., Ltd. Jul 2020 Evaluation Committee Member, Regenerative and Cell Therapy/Gene Therapy Project, Japan Agency for Medical Research and Development (AMED) (current) Apr 2025 Life Science Coordinator, Industry-University Research Collaboration Institute Co., Ltd. (current) May 2025 Advisor, Medical Grown Co., Ltd. (current) Jul 2025 Advisor (Drug Discovery), UntroD Capital Japan Co., Ltd. (current) Jun 2026 Director, Audit and Supervisory Committee Member, the Company (current)
1959-09-14
Large Shareholding Reports
Macquarie Bank Limited
2026-07-03
8.15%→0.63%
NOMURA INTERNATIONAL PLC
2026-04-21
0.99%
Nomura Securities Co., Ltd.
2026-03-19
7.24%
Annual report (as of 2026-03-31): 0.96%
Macquarie Bank Limited
2026-03-16
10.77%→8.15%
Macquarie Bank Limited
2026-03-13
17.95%→10.77%
Macquarie Bank Limited
2026-03-11
19.44%→17.95%
Macquarie Bank Limited
2026-02-25
20.36%→19.44%
Macquarie Bank Limited
2026-01-09
20.36%
Disclosures
No disclosures
Primary Source Filings
TDnet
2026-08-13
Q1 Earnings Flash
FY ending Mar 2027
EDINET
2026-07-03
Large Shareholding Report
EDINETAmended
2026-06-30
Amended Annual Securities Report
Period: Apr 2025 – Mar 2026
EDINET
2026-06-22
Annual Securities Report
Period: Apr 2025 – Mar 2026
EDINET
2026-04-21
Large Shareholding Report
EDINET
2026-03-19
Large Shareholding Report
EDINET
2026-03-16
Large Shareholding Report
EDINET
2026-03-13
Large Shareholding Report
EDINET
2026-03-11
Large Shareholding Report
EDINET
2026-02-25
Large Shareholding Report
TDnet
2026-02-13
Q3 Earnings Flash
FY ending Mar 2026
EDINET
2026-01-09
Large Shareholding Report
EDINET
2025-12-17
Securities Registration Statement
EDINET
2025-11-14
Semi-Annual Securities Report
Period: Apr 2025 – Mar 2026
TDnet
2025-08-14
Q1 Earnings Flash
FY ending Mar 2026
EDINETAmended
2025-06-27
Amended Annual Securities Report
Period: Apr 2023 – Mar 2024
EDINET
2025-06-27
Annual Securities Report
Period: Apr 2024 – Mar 2025
EDINETAmended
2025-06-27
Amended Annual Securities Report
Period: Apr 2022 – Mar 2023
TDnet
2025-02-14
Q3 Earnings Flash
FY ending Mar 2025
EDINET
2024-11-14
Semi-Annual Securities Report
Period: Apr 2024 – Mar 2025
TDnetAmended
2024-08-26
Q1 Earnings Flash
FY ending Mar 2025
TDnet
2024-08-14
Q1 Earnings Flash
FY ending Mar 2025
EDINET
2024-06-20
Annual Securities Report
Period: Apr 2023 – Mar 2024
EDINET
2024-02-20
Securities Registration Statement
EDINET
2024-02-14
Quarterly Securities Report
Period: Oct 2023 – Dec 2023
EDINET
2023-11-13
Quarterly Securities Report
Period: Jul 2023 – Sep 2023
EDINETAmended
2023-11-06
Amended Annual Securities Report
Period: Apr 2022 – Mar 2023
EDINET
2023-08-14
Quarterly Securities Report
Period: Apr 2023 – Jun 2023
EDINET
2023-06-23
Annual Securities Report
Period: Apr 2022 – Mar 2023
EDINET
2023-02-13
Quarterly Securities Report
Period: Oct 2022 – Dec 2022
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