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SUMCO CORPORATION — Investor Relations & Filings

Ticker · 3436 ISIN · JP3322930003 LEI · 353800SUSRUOM0V6KU92 T Manufacturing
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Filings indexed 66 across all filing types
Latest filing 2026-03-26 Regulatory Filings
Country JP Japan
Listing T 3436

About SUMCO CORPORATION

https://www.sumcosi.com/english/

SUMCO CORPORATION is a manufacturer specializing in high-purity silicon wafers, the fundamental substrate material for the semiconductor industry. The company produces and supplies a range of high-quality products, including polished wafers and epitaxial wafers, which are essential for manufacturing various electronic devices. SUMCO serves the global semiconductor market by providing wafers engineered to meet diverse and advanced customer specifications, thereby supporting technological innovation across the electronics sector.

Recent filings

Filing Released Lang Actions
確認書
Regulatory Filings Classification · 90% confidence The document is a Japanese confirmation statement (確認書) submitted to the Kanto Finance Bureau under the Financial Instruments and Exchange Act, attesting to the accuracy of the company’s Annual Securities Report (有価証券報告書) for the fiscal year. It is not the report itself nor an earnings announcement, but a mandatory regulatory filing. This falls under the general regulatory filings category.
2026-03-26 Japanese
有価証券報告書－第27期(2025/01/01－2025/12/31)
Annual Report Classification · 100% confidence The document is a Japanese 'Yuka Shoken Hokokusho' (Securities Report), which is the Japanese equivalent of a 10-K annual report. It contains the header information for the fiscal year ending December 31, 2025, and is filed under the Financial Instruments and Exchange Act. As it is the primary annual financial disclosure document for the company, it is classified as a 10-K. FY 2025
2026-03-26 Japanese
確認書
Regulatory Filings Classification · 100% confidence The document is a 'Confirmation Letter' (確認書) filed under the Financial Instruments and Exchange Act. It serves as an officer certification regarding the accuracy of a previously filed semi-annual report. According to the 'CERTIFICATION RULE', documents that are primarily officer certifications or attestations should be classified as Regulatory Filings (RNS), even if they reference a specific report type like an interim/semi-annual report. H1 27
2025-08-08 Japanese
半期報告書－第27期(2025/01/01－2025/12/31)
Interim / Quarterly Report Classification · 100% confidence The document is a '半期報告書' (Semi-Annual Report) filed by SUMCO Corporation under the Financial Instruments and Exchange Act of Japan. It contains comprehensive financial statements, including the balance sheet, income statement, and cash flow analysis for the interim period ending June 30, 2025. As it is a formal, comprehensive financial report for a period shorter than a full fiscal year, it is classified as an Interim/Quarterly Report. H1 2025
2025-08-08 Japanese
臨時報告書
Declaration of Voting Results & Voting Rights Announcements Classification · 98% confidence The document is a Japanese regulatory filing, indicated by the header information (e.g., 【提出書類】 臨時報告書, 【提出先】 関東財務局長, 【提出日】 2025年３月28日). The content explicitly details the resolutions passed at the Annual General Meeting (株主総会) held on March 27, 2025, including changes to the articles of incorporation and the election/re-election of directors and audit committee members, along with the voting results (賛成, 反対, 棄権). This structure strongly suggests a filing reporting the results of a shareholder meeting. The closest specific category for reporting voting results is 'Declaration of Voting Results & Voting Rights Announcements' (DVA). Although it relates to the AGM, the primary focus is reporting the *results* of the votes, not the presentation materials (AGM-R) or the proxy solicitation (PSI). Given the content is the official report of the voting outcomes, DVA is the most appropriate classification.
2025-03-28 Japanese
確認書
Audit Report / Information Classification · 95% confidence The document is extremely short (608 characters) and contains a header section typical of Japanese regulatory filings, specifically mentioning a '確認書' (Confirmation Document) submitted to the '関東財務局長' (Kanto Local Finance Bureau Director) based on Article 24-4-2, Paragraph 1 of the Financial Instruments and Exchange Act. The core content confirms the appropriateness of the contents of the '第26期...有価証券報告書' (26th Period... Annual Securities Report) for the fiscal year ending December 31, 2024. This document is a certification or confirmation related to the Annual Report (10-K equivalent in Japan, known as Yuho). Since this is a confirmation document *about* the annual report, and not the full report itself, it does not fit 10-K. It is a specific regulatory confirmation. Given the options, it is a specific regulatory filing that doesn't fit the other categories well. However, the content is directly tied to the annual reporting cycle and confirmation of the annual report's accuracy. In the context of US filings, this is analogous to certifications often included with 10-K filings. Since it is a specific regulatory confirmation document, and not a general announcement (RPA/RNS), and it relates to the annual report, it is best classified as a specific regulatory filing. Given the provided definitions, 'AR' (Audit Report / Information) is the closest fit for documents related to the verification/assurance of annual financial statements, even if this is a management confirmation rather than an external auditor's report. If a more specific 'Certification' code existed, it would be used. Lacking that, and recognizing it as a formal regulatory document confirming the annual filing's accuracy, AR is the most appropriate category among the choices for formal assurance/verification documents. FY 2024
2025-03-27 Japanese

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