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United Microelectronic Corp. (UMC)

NYSE: UMC · Semiconductors & Related Devices · Taipei, TW · filing with the SEC since 1997
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Grade5.7
◀ Past 6.3● Present 6.2▶ Future 4.6
1 est.
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Filings

348 filings since 2017 beside 35 insider forms · Large accelerated filer · read from EDGAR on Nov 13, 2026
Due nextLarge accelerated filer
20-F Annual report, foreign filer for the fiscal year ending Dec 31, 2026Foreign filers have four months after the fiscal year ends. by Apr 30, 2027

A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files.

Filings a yearinsider forms included
3034283025344895
20192020202120222023202420252026

2026 counts to Nov 13, 2026.

Insider forms 35

Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.

FiledFormWhat it is, in plain wordsPeriodAsk
Nov 12, 2026 6-K Interim report, foreign filer
Nov 5, 2026 6-K Interim report, foreign filer
Nov 3, 2026 6-K Interim report, foreign filer
Oct 28, 2026 6-K Interim report, foreign filer
Oct 28, 2026 6-K Interim report, foreign filer
Oct 23, 2026 6-K Interim report, foreign filer
Oct 13, 2026 6-K Interim report, foreign filer
Oct 6, 2026 6-K Interim report, foreign filer
Oct 5, 2026 6-K/A Interim report, foreign filer, amended
Oct 5, 2026 6-K Interim report, foreign filer
Sep 29, 2026 6-K Interim report, foreign filer
Sep 4, 2026 6-K Interim report, foreign filer
Sep 2, 2026 6-K Interim report, foreign filer
Aug 26, 2026 6-K Interim report, foreign filer
Aug 14, 2026 6-K Interim report, foreign filer
Aug 6, 2026 6-K Interim report, foreign filer
Aug 5, 2026 6-K Interim report, foreign filer
Jul 30, 2026 6-K Interim report, foreign filer
Jul 29, 2026 6-K Interim report, foreign filer
Jul 29, 2026 6-K Interim report, foreign filer
Jul 21, 2026 6-K Interim report, foreign filer
Jul 15, 2026 6-K Interim report, foreign filer
Jul 14, 2026 6-K Interim report, foreign filer
Jul 6, 2026 6-K Interim report, foreign filer
Jun 29, 2026 6-K Interim report, foreign filer
Jun 23, 2026 6-K Interim report, foreign filer
Jun 22, 2026 6-K Interim report, foreign filer
Jun 18, 2026 6-K Interim report, foreign filer
Jun 16, 2026 6-K Interim report, foreign filer
Jun 5, 2026 6-K Interim report, foreign filer
Jun 3, 2026 6-K Interim report, foreign filer
May 29, 2026 SD Conflict minerals report
May 27, 2026 6-K Interim report, foreign filer
May 22, 2026 6-K Interim report, foreign filer
May 20, 2026 6-K Interim report, foreign filer
May 15, 2026 6-K Interim report, foreign filer
May 13, 2026 6-K Interim report, foreign filer
May 12, 2026 6-K Interim report, foreign filer
May 11, 2026 6-K Interim report, foreign filer
May 8, 2026 6-K Interim report, foreign filer
40 of 348 shown

Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.

SI Assistanton UMC · research, not advice