United Microelectronics CORP (UMC) — SEC Filings

Overview

United Microelectronics CORP (UMC) is a publicly traded company tracked on ReadTheFiling. The most recent enriched filing is a 6-K filed on Apr 21, 2026: United Microelectronics Corp. filed a Form 6-K on April 21, 2026, reporting information as a foreign issuer. The filing includes documents such as the 6-K report itself, an exhibit EX-99.1, and a graphic file. The company's mailing and business address is in Taipei, Taiwan.

Sentiment Summary

Across 50 filings, the sentiment breakdown is: 50 neutral. The dominant filing sentiment for United Microelectronics CORP is neutral.

Filing Type Overview

United Microelectronics CORP (UMC) has filed 49 6-K, 1 20-F with the SEC between Dec 2024 to Apr 2026.

Filings by Year

2026 · 2025 · 2024

Recent Filings (50)

• UMC Files 6-K Report — 6-K · Apr 21, 2026 Risk: low
  United Microelectronics Corp. filed a Form 6-K on April 21, 2026, reporting information as a foreign issuer. The filing includes documents such as the 6-K repor
• 6-K Filing — 6-K · Apr 15, 2026
• UMC Files 6-K Report — 6-K · Apr 8, 2026 Risk: low
  United Microelectronics Corp. filed a Form 6-K on April 8, 2026, reporting information as a foreign issuer. The filing includes documents such as the 6-K itself
• UMC Files Routine 6-K; No New Material Info Disclosed — 6-K · Mar 26, 2026
  UNITED MICROELECTRONICS CORP (UMC) filed a 6-K on March 26, 2026, indicating a routine report for foreign issuers. This filing, with accession number 0001193125
• 6-K Filing — 6-K · Dec 30, 2025
• 6-K Filing — 6-K · Dec 17, 2025
• United Microelectronics Corp Files 6-K Report — 6-K · Dec 10, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on December 10, 2025. The filing is a report of a foreign issuer pursuant to SEC rules. The company is inco
• UMC Files 6-K Report with SEC — 6-K · Dec 4, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on December 4, 2025, to report information as a foreign issuer. The filing indicates the company is subject
• UMC Files 6-K Report — 6-K · Nov 28, 2025 Risk: low
  United Microelectronics Corporation (UMC) filed a Form 6-K on November 28, 2025. The filing is a report of a foreign issuer pursuant to Rule 13a-16 or 15d-16 of
• 6-K Filing — 6-K · Nov 20, 2025
• UMC Files 6-K Report with SEC — 6-K · Nov 12, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on November 12, 2025, reporting as a foreign issuer. The filing provides standard corporate information and
• United Microelectronics Corp Files 6-K Report — 6-K · Nov 6, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on November 6, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its repo
• UMC Files 6-K Report, Confirms 20-F Filing — 6-K · Oct 29, 2025 Risk: low
  United Microelectronics Corporation (UMC) filed a Form 6-K on October 29, 2025. The filing is a report of a foreign issuer and indicates that UMC files its annu
• UMC Files 6-K Report — 6-K · Oct 28, 2025 Risk: low
  United Microelectronics Corporation (UMC) filed a Form 6-K on October 28, 2025. The filing is a report of a foreign issuer pursuant to Rule 13a-16 or 15d-16 of
• UMC Files 6-K Report with SEC — 6-K · Oct 27, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on October 27, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its repo
• UMC Files 6-K Report with SEC — 6-K · Oct 21, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on October 21, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its repo
• UMC Files 6-K Report with SEC — 6-K · Oct 15, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on October 15, 2025. This report is filed pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act
• United Microelectronics Corp Files Routine 6-K — 6-K · Oct 7, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on October 7, 2025, reporting as a foreign issuer. The filing does not contain specific financial figures o
• United Microelectronics Corp Files 6-K — 6-K · Sep 22, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on September 22, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its an
• United Microelectronics Corp Files 6-K Report — 6-K · Sep 10, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on September 10, 2025. This report is for a foreign issuer and is filed pursuant to Rule 13a-16 or 15d-16 o
• United Microelectronics Corp Files 6-K Report — 6-K · Sep 4, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on September 4, 2025, reporting as a foreign issuer. The filing provides information regarding its principa
• United Microelectronics Corp Files 6-K Report — 6-K · Aug 13, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on August 13, 2025. The filing is a report of a foreign issuer and indicates that the company files annual
• United Microelectronics Corp. Files 6-K Report — 6-K · Aug 12, 2025 Risk: low
  United Microelectronics Corporation (UMC) filed a Form 6-K on August 12, 2025. The filing is a report of a foreign issuer pursuant to SEC rules. UMC is incorpor
• United Microelectronics Corp Files 6-K Report — 6-K · Aug 6, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on August 6, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its report
• United Microelectronics Corp Files Routine 6-K — 6-K · Jul 30, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on July 30, 2025, to report information as a foreign issuer. The filing does not contain specific financial
• United Microelectronics Corp Files Routine 6-K — 6-K · Jul 28, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on July 28, 2025, reporting as a foreign issuer. The filing does not contain specific financial figures or
• UMC Files 6-K Report — 6-K · Jul 22, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on July 22, 2025. This report is for a foreign issuer and is filed pursuant to Rule 13a-16 or 15d-16 of the
• UMC Files 6-K Report with SEC — 6-K · Jul 10, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on July 10, 2025, reporting as a foreign issuer. The filing indicates the company is based in Taiwan and op
• United Microelectronics Corp Files 6-K Report — 6-K · Jul 7, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on July 7, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its report u
• United Microelectronics Corp Files 6-K — 6-K · Jun 30, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on June 30, 2025, reporting as a foreign issuer. The filing confirms they will file annual reports under Fo
• United Microelectronics Corp Files 6-K Report — 6-K · Jun 20, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on June 20, 2025, reporting its status as a foreign issuer. The filing confirms the company's principal exe
• United Microelectronics Corp Files 6-K — 6-K · Jun 10, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on June 10, 2025, reporting as a foreign issuer. The filing indicates the company is subject to the 1934 Ac
• United Microelectronics Corp Files 6-K Report — 6-K · Jun 5, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on June 5, 2025. The filing is a report of a foreign issuer pursuant to Rule 13a-16 or 15d-16 of the Securi
• UMC Files 6-K Report with SEC — 6-K · Jun 4, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on June 4, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its report u
• UMC Files 6-K Report — 6-K · May 28, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on May 28, 2025, to report information as a foreign issuer. The filing indicates the company is based in Ta
• UMC Files 6-K with SEC — 6-K · May 15, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on May 15, 2025, reporting its status as a foreign issuer. The filing confirms its principal executive offi
• UMC Files 6-K Report — 6-K · May 8, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on May 8, 2025, reporting as a foreign issuer. The filing provides standard corporate information, includin
• UMC Files 2024 Annual Report: New Associates Added — 20-F · Apr 24, 2025 Risk: medium
  United Microelectronics Corp. (UMC) filed its annual 20-F report for the fiscal year ending December 31, 2024. The filing details financial information and busi
• United Microelectronics Corp Files 6-K Report — 6-K · Apr 24, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on April 24, 2025. This report is for a foreign issuer and is filed pursuant to Rule 13a-16 or 15d-16 of th
• United Microelectronics Corp Files 6-K Report — 6-K · Apr 23, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on April 23, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its report
• United Microelectronics Corp Files 6-K Report — 6-K · Apr 10, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on April 10, 2025, reporting as a foreign issuer. The filing indicates the company is subject to the 1934 S
• United Microelectronics Corp Files 6-K — 6-K · Apr 1, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on April 1, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its report
• UMC Files 6-K for FY 2024 Results — 6-K · Mar 20, 2025 Risk: low
  United Microelectronics Corporation (UMC) filed a Form 6-K on March 20, 2025, reporting its financial results for the fiscal year ended December 31, 2024. The f
• United Microelectronics Corp Files 6-K — 6-K · Mar 11, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on March 11, 2025, reporting as a foreign issuer. The filing indicates the company is submitting its report
• United Microelectronics Corp Files Routine 6-K — 6-K · Feb 26, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on February 26, 2025, reporting as a foreign issuer. The filing does not contain specific financial figures
• United Microelectronics Corp Files 6-K — 6-K · Feb 11, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on February 11, 2025, reporting information as a foreign issuer. The filing provides standard corporate inf
• United Microelectronics Corp Files 6-K Report — 6-K · Jan 21, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on January 21, 2025, reporting as a foreign issuer. The filing indicates the company's principal executive
• United Microelectronics Corp Files 6-K — 6-K · Jan 13, 2025 Risk: low
  United Microelectronics Corporation filed a Form 6-K on January 13, 2025, reporting information as of January 10, 2025. The filing is for a foreign issuer and i
• United Microelectronics Corp Files 6-K — 6-K · Dec 27, 2024 Risk: low
  United Microelectronics Corporation filed a Form 6-K on December 27, 2024. This report is for a foreign issuer and is filed pursuant to Rule 13a-16 or 15d-16 of
• UMC Files 6-K, Confirms 20-F Reporting — 6-K · Dec 18, 2024 Risk: low
  United Microelectronics Corporation filed a Form 6-K on December 18, 2024, reporting its status as a foreign issuer. The filing indicates the company is subject

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