Last checked Oct 8, 2026
ASTRUM CORPORATION (formerly Pentel Co., Ltd.; Japan stationery manufacturer within the PLUS Group)astrum-st.comASTRUM CORPORATION (formerly Pentel Co., Ltd.; Japan stationery manufacturer within the PLUS Group) is not currently listed as private-equity-owned.
Ownership & Acquisition History
No evidence was found that ASTRUM CORPORATION is currently controlled by a private equity firm; it is described as a PLUS CORPORATION group company.
Notes
- ASTRUM CORPORATION states it changed its corporate name from Pentel Co., Ltd. to ASTRUM CORPORATION effective April 1, 2026 and describes itself as a PLUS CORPORATION group company.
- ASTRUM CORPORATION lists its establishment date as March 1946 and provides its Tokyo head office address.
- Founder information for the underlying legacy operating company (Pentel) is attributed to Yukio Horie (used here as the founder of the company that became ASTRUM CORPORATION via name change).
- Logo image could not be reliably identified as a current ASTRUM CORPORATION logo from available pages within the tool session; therefore logoUrl is set to Unknown.
- The term “Astrum” is used by many unrelated companies globally; this result specifically resolves to the Japan-based stationery manufacturer at astrum-st.com.
Sources
- Company | ASTRUM CORPORATION
ASTRUM CORPORATION (official site) - Establishment date (March 1946), head office location (Tokyo), and description of ASTRUM as a PLUS CORPORATION group company; name change effective April 1, 2026.
- Pentel Co., Ltd. changing corporate name to ASTRUM CORPORATION as of April 1, 2026
ASTRUM CORPORATION (official site) - Confirms corporate name change to ASTRUM CORPORATION effective April 1, 2026 and states it operates under PLUS CORPORATION as a group company.
- Pentel – Wikipedia
Wikipedia - Provides founder attribution (Yukio Horie) and founding context (founded 1946 in Tokyo) for the legacy company (Pentel) that later changed name to ASTRUM CORPORATION.
- Pentel Milestones (Pentel Report 2016 PDF)
Pentel (CSR/Report PDF) - References Yukio Horie as the founder (used to support founder attribution for the legacy company behind ASTRUM CORPORATION).
- https://www.astrum-capital.com/wp-content/uploads/2021/09/2021093001507_e.pdf
Web search - Consulted by the research agent
- https://www.astrum-capital.com/wp-content/uploads/2016/06/Astrum-Financial_Prospectus-ENG.pdf
Web search - Consulted by the research agent
- https://www.bsaiii.com/sec-filings/content/0001104659-26-102023/tm2624075d1_ex2-1.htm
Web search - Consulted by the research agent
- https://www.astrum.in/
Web search - Consulted by the research agent
- https://www.cbinsights.com/investor/astrum
Web search - Consulted by the research agent
- https://www.annualreports.com/HostedData/AnnualReportArchive/m/OTC_MLRYY_2010.pdf
Web search - Consulted by the research agent
- https://www.astrum-capital.com/wp-content/uploads/2023/03/2022-Annual-Report_ENG.pdf
Web search - Consulted by the research agent
Ownership FAQ
Is ASTRUM CORPORATION (formerly Pentel Co., Ltd.; Japan stationery manufacturer within the PLUS Group) owned by private equity?
No. ASTRUM CORPORATION (formerly Pentel Co., Ltd.; Japan stationery manufacturer within the PLUS Group) does not currently appear to be private-equity-owned.
Who owns ASTRUM CORPORATION (formerly Pentel Co., Ltd.; Japan stationery manufacturer within the PLUS Group)?
PLUS CORPORATION (Japan) – ASTRUM CORPORATION operates as a PLUS Group company (not evidence of private equity control found)
When was ASTRUM CORPORATION (formerly Pentel Co., Ltd.; Japan stationery manufacturer within the PLUS Group) last checked?
This page was last checked on Oct 8, 2026.