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Overview

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SIOS Corporation

SIOS Corporation operates two core business segments: the Open System Infrastructure Business, which provides high-availability software 'LifeKeeper,' OSS-related products including Red Hat solutions, and OSS consulting services; and the Application Business, which offers MFP document management software, financial institution services, cloud-based workflow solutions under the 'Gluegent Series,' and custom enterprise system development. The company leverages open-source software as its technological foundation to deliver IT system development, infrastructure construction, and operational support. SIOS is also actively pursuing R&D in emerging areas such as AI, including development of diagnostic AI models for medical imaging.

Market Cap

¥4.37B

US$27.8M

¥-0.19B

-US$1.22M

Stock¥504▼-1.18%

US$1 = ¥157.05 (2026-10-22)

LTM EV/EBITDA

LTM EV/EBIT

LTM PER

12.8

LTM PBR

2.3

2026-08-25 closing price basis: ranked #102 in beluuga.ai's "Japanese listed companies with negative Enterprise Value" ranking (simplified EV ≈ ¥-6B).

Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-15.8%pt

Oct 23, 25 – Oct 23, 26StockTOPIX

1Aug 7, 26Q2 earnings: sales +15.4%, op. profit +9.0%, but full-year guidance left unchanged, disappointing market

MC → EV Bridge

AI Briefing

Generating insights…

Performance & Balance

Revenue 5Y (¥B)

EBITDA 5Y (¥B)

Net Income 5Y (¥B)

Capital Structure

98%

EquityD/E 0.02xDebt

Liquidity vs Debt 5Y (¥B)▲ Net Cash

CashInv. Sec.Debt

Shareholders

Top 10 hold 57.3%

as of 2026-06-30 · Source: Annual Securities Report

OTSUKA CORPORATION

17.96%

Persol Tempstaff Co., Ltd.

16.91%

Kita Enterprise Co., Ltd.

10.37%

Nobuo KITA

2.43%

Custody Bank of Japan, Ltd. (Trust Account)

2.28%

SIOS Corporation Employee Stock Ownership Association

1.89%

Atsushi OTSUKA

1.64%

Morgan Stanley MUFG Securities Co., Ltd.

1.51%

Fsas Technologies Inc.

1.24%

Ichiro FUKUDA

1.04%

Management

8 officers

Nobuo KITA

Representative Director, President

Apr 1982: Joined Inabata & Co., Ltd. Jul 1999: Representative Director, President, Northern Lights Computer Co., Ltd. Jan 2002: Representative Director, President, the Company Mar 2006: Representative Director, President and Chief Operating Executive, the Company (current) Jun 2015: Director, BayPOS, Inc. (current) Oct 2017: Representative Director, President, SIOS Technology, Inc. (current) Aug 2019: Director and CEO, SIOS Technology Corp. (current)

1959-08-03

Noboru MORITA

Director

Dec 2003: Representative Director, President, Fiosys Consulting Co., Ltd. May 2004: Director, ODK Information Systems Co., Ltd. Jun 2008: Representative Director, Chairman, Bit Cruise Co., Ltd. May 2015: Senior Managing Executive Officer, the Company Mar 2016: Director and Senior Managing Executive Officer, the Company (current) Mar 2018: Director, SIOS Technology, Inc. (current) Dec 2020: Director, Cecios Co., Ltd. (current)

1963-09-18

Yasuyuki YAMASAKI

Director

Apr 2001: Joined Nippon Rational Software K.K. (now IBM Japan, Ltd.) May 2003: Joined the Company; Executive Officer Oct 2017: Director, SIOS Technology, Inc. (current) Mar 2021: Director, the Company (current) Sep 2025: Director, Sandy Blue Co., Ltd. (current)

1963-02-21

Tokutaro KOBAYASHI

Director

Nov 1997: Joined Konami Corporation (now Konami Group Corporation) May 2003: Joined Fero Japan Co., Ltd. (now Vibrants Japan Co., Ltd.) Jul 2006: Joined the Company Apr 2007: Executive Officer, the Company Feb 2011: Director, SIOS Technology Corp. (current) Apr 2015: Managing Executive Officer, the Company Mar 2021: Director and Managing Executive Officer, the Company (current) Sep 2025: Audit & Supervisory Board Member, Sandy Blue Co., Ltd. (current)

1962-10-29

Miki ONO

Outside Director

Oct 2005: Registered as attorney-at-law (Tokyo Bar Association); joined Cast Itoga Law Corporation Feb 2007: Joined Atsumi Sogo Law Offices, Foreign Law Joint Enterprise (now Atsumi & Sakai Law Offices, Foreign Law Joint Enterprise) Jan 2017: Partner, Atsumi & Sakai Law Offices, Foreign Law Joint Enterprise (current) Mar 2022: Outside Director, the Company (current)

1976-07-20

Yuki HIRAMATSU

Director (Full-time Audit and Supervisory Committee Member)

Apr 1983: Joined Nihon Keibo Hosho Co., Ltd. (now SECOM Co., Ltd.) Aug 1989: Joined Nikko Venture Capital Co., Ltd. (now Ant Capital Partners Co., Ltd.) May 2004: Joined the Company Apr 2008: Executive Officer, the Company Mar 2011: Full-time Audit & Supervisory Board Member, the Company Mar 2017: Director (Full-time Audit and Supervisory Committee Member), the Company (current) Oct 2017: Audit & Supervisory Board Member, SIOS Technology, Inc. (current)

1958-03-15

Katsumi FURUHATA

Director (Audit and Supervisory Committee Member)

Oct 1975: Joined Chuo Accounting Office (audit firm) Oct 1981: Representative, Certified Public Accountant Katsumi Furuhata Office (current) Apr 1999: Audit & Supervisory Board Member, the Company Mar 2001: Representative Director, President, fellow Co., Ltd. (current) Mar 2017: Outside Director (Audit and Supervisory Committee Member), the Company (current) Jan 2024: Audit & Supervisory Board Member, ATC Co., Ltd. (current)

1952-04-25

Hiroyuki HASEGAWA

Director (Audit and Supervisory Committee Member)

Oct 2001: Registered as attorney-at-law (Tokyo Bar Association); joined Nagashima Ohno & Tsunematsu Apr 2011: Securities and Exchange Surveillance Commission Secretariat Feb 2013: Joined Kataoka Sogo Law Office Jan 2014: Partner, Kataoka Sogo Law Office (current) Mar 2016: Audit & Supervisory Board Member, the Company Mar 2017: Outside Director (Audit and Supervisory Committee Member), the Company (current) May 2019: Audit & Supervisory Board Member, TiMS Inc. (current)

1976-08-13

Large Shareholding Reports

No filings

Disclosures

No disclosures

Primary Source Filings

EDINET

2026-08-07

Semi-Annual Securities Report

Period: Jan 2026 – Dec 2026

SIOS Corporation

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SIOS Corporation

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