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TOSOH CORPORATION — Investor Relations & Filings

Ticker · 4042 ISIN · JP3595200001 LEI · 529900YSLFVJF2MDBX02 T Manufacturing
Open in API
Filings indexed 81 across all filing types
Latest filing 2026-05-13 Board/Management Inform…
Country JP Japan
Listing T 4042

About TOSOH CORPORATION

https://www.tosoh.co.jp/

Tosoh Corporation is a global chemical and specialty materials group. The company's core activities are organized into distinct business segments. The Chlor-Alkali segment is a major producer of caustic soda, vinyl chloride monomer (VCM), and polyvinyl chloride (PVC). The Petrochemical segment manufactures olefins and polymers, supplying essential raw materials for a wide range of industrial applications. The Specialty Group develops and markets advanced materials, including high-purity silica glass for semiconductor manufacturing, separation and purification media for the life sciences, and battery materials. The Engineering Group provides comprehensive plant construction and environmental services. Through its global network of companies, Tosoh delivers a diverse portfolio of products and solutions that support modern industries.

Recent filings

Filing Released Lang Actions
臨時報告書
Board/Management Information Classification · 95% confidence The document is an “臨時報告書” (Extraordinary report) filed under Japan’s Financial Instruments and Exchange Act detailing changes in the company’s representative directors (one appointment and one retirement). It is a direct announcement of board/senior management changes rather than a full financial report or other notices. This aligns exactly with the Board/Management Information category (Code: MANG).
2026-05-13 Japanese
連結業績予想の修正に関するお知らせ
Regulatory Filings
2026-04-21 Japanese
自己株券買付状況報告書（法２４条の６第１項に基づくもの）
Transaction in Own Shares Classification · 90% confidence The document is a “自己株券買付状況報告書” filed under the Financial Instruments and Exchange Act, detailing the number and value of treasury shares acquired by the company over a reporting period. This matches the definition for “Transaction in Own Shares” (Code: POS), which covers reports of companies buying back their own shares.
2026-04-13 Japanese
大量保有報告書
Major Shareholding Notification Classification · 91% confidence The document is a Japanese “大量保有報告書” under FIEA Article 27-23, a mandatory disclosure of large shareholdings for listed issuers, detailing share counts, ownership percentages, and reasons. This matches the Major Shareholding Notification category.
2026-03-24 Japanese
訂正報告書（大量保有報告書・変更報告書）
Major Shareholding Notification Classification · 90% confidence The document is a Japanese ‘大量保有報告書’ (large shareholding report) under the Cabinet Office ordinance, detailing changes in share ownership percentages by a corporate entity. This precisely matches a major shareholding notification (threshold crossing) rather than an earnings release or AGM materials. Therefore, it is classified as MRQ.
2026-03-24 Japanese
訂正報告書（大量保有報告書・変更報告書）
Major Shareholding Notification Classification · 92% confidence The document is a Japanese ‘大量保有報告書’ (Large Shareholding Report) filed under Article 27-23, detailing the number of shares held, ownership percentages, and reasons for holding. This matches the definition of a Major Shareholding Notification, which reports changes in significant ownership levels when thresholds are crossed. It is not an announcement of a meeting, financial report, or other category but specifically a large shareholding disclosure.
2026-03-24 Japanese

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