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UNITED MICROELECTRONICS CORP — Investor Relations & Filings

Ticker · UMC ISIN · US9108734057 LEI · 391200YJCAGH9LF96P73 US Manufacturing
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Filings indexed 671 across all filing types
Latest filing 2026-06-05 Regulatory Filings
Country TW Taiwan
Listing US UMC

About UNITED MICROELECTRONICS CORP

https://www.umc.com/

United Microelectronics Corporation (UMC) is a global semiconductor foundry that provides integrated circuit (IC) fabrication services. The company offers a comprehensive portfolio of logic and specialty process technologies, including radio frequency (RF), embedded high-voltage (eHV), Bipolar-CMOS-DMOS (BCD), and embedded non-volatile memory (eNVM). UMC's foundry solutions cater to a wide range of applications across high-growth sectors such as mobile and wireless communications, computing and data processing, the Internet of Things (IoT), wearables, automotive, and consumer electronics. The company's services encompass circuit design support, mask tooling, wafer fabrication, and testing, enabling fabless design companies and integrated device manufacturers to bring their products to market.

Recent filings

Filing Released Lang Actions
6-K
Regulatory Filings Classification · 95% confidence The document is a Form 6-K “Report of Foreign Issuer” filed under the Securities Exchange Act (a routine SEC regulatory filing by a foreign company) and contains only the cover page, signature block, and exhibit index without substantive financial statements or other report content. This matches the generic Regulatory Filings category (RNS).
2026-06-05 English
6-K
Regulatory Filings Classification · 90% confidence The document is a Form 6-K “Report of Foreign Issuer” filed under the Securities Exchange Act of 1934. It contains only the cover page and signature, with no substantive financial data or detailed presentation. This falls under general regulatory/SEC compliance filings rather than an annual report, earnings release, or other specific category. Therefore it should be classified as a Regulatory Filing (RNS).
2026-06-03 English
SD
Regulatory Filings Classification · 90% confidence The document is a Form SD (“Specialized Disclosure Report”) filed under Rule 13p-1 to disclose the company’s Conflict Minerals Report. It is a compliance/regulatory filing rather than a full annual or interim financial report, earnings release, governance charter, or environmental sustainability report. It simply indicates that the Conflict Minerals Report is filed as an exhibit and provides website links. This aligns with “Regulatory Filings (RNS)” as a general compliance disclosure category.
2026-05-29 English
6-K
Regulatory Filings Classification · 90% confidence The document is a Form 6-K report, which is a SEC regulatory filing by a foreign issuer under Rule 13a-16/15d-16. It contains no financial statements or substantive content beyond the filing itself. Under our taxonomy, such generic SEC compliance submissions fall under Regulatory Filings (RNS).
2026-05-27 English
6-K
Regulatory Filings Classification · 95% confidence The document is a U.S. SEC Form 6-K “Report of Foreign Issuer” filed under Rule 13a-16/15d-16. It contains signature pages and an exhibit index, but no substantive financial statements or investor presentation. It is a routine regulatory submission by a foreign registrant, fitting the fallback category for miscellaneous regulatory filings. Therefore it should be classified as Regulatory Filings (RNS).
2026-05-22 English
6-K
Regulatory Filings Classification · 85% confidence The document is a Form 6-K “Report of Foreign Issuer” filed with the U.S. SEC. It contains the cover page, signature block, and exhibit index but no substantive financial data. This is a generic regulatory submission rather than an annual report, earnings release, or any other specialized category, so it falls under Regulatory Filings (RNS).
2026-05-20 English

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