UNITED MICROELECTRONICS CORP
48 SEC EDGAR filings indexed (CIK 0001033767) across 9 form types.
Filing profile
UNITED MICROELECTRONICS CORP (UMC) has 48 SEC filings indexed on SecFilingDex, across 9 form types filed over roughly 29 years, from February 26, 1997 to August 26, 2026. The filer is classified under Semiconductors & Related Devices (SIC 3674).
Its most frequent disclosure is the 6-K (Foreign event) with 8 filings — Material disclosure filed by foreign private issuers as required by their home country. 19 of these filings were disclosed in the twelve months to August 26, 2026. 12 of the 48 are amendments (a corrected or updated version of an earlier filing).
Disclosure mix
- 86-KForeign event · event-driven
- 8Form 3Initial insider ownership · within 10 days of becoming an insider
- 820-FForeign annual · annual
- 8SC 13G/A5%+ passive stake · event-driven
- 8SC 13G5%+ passive stake · event-driven
- 3SC 13D/A5%+ activist stake · event-driven (within 10 days)
- 2Form 4Insider transaction · within 2 business days of transaction
- 2424B5Prospectus supplement · event-driven
- 120-F/AForeign annual · annual
Profile derived from 48 indexed filings; every figure traces to the filing records above, each linking back to its original SEC EDGAR document. Filing counts reflect SecFilingDex's current index, not the filer's complete EDGAR history.
All filings
- 6-K0001193125-26-365826
- 6-K0001193125-26-350180
- 6-K0001193125-26-336498
- 6-K0001193125-26-333718
- 6-K0001193125-26-324785
- 6-K0001193125-26-322027
- 6-K0001193125-26-322030
- 6-K0001193125-26-309462
- Form 40001193125-26-301380
- Form 40001193125-26-291233
- Form 30001193125-26-210181
- Form 30001193125-26-210184
- Form 30001193125-26-210189
- Form 30001193125-26-210195
- Form 30001193125-26-210200
- Form 30001193125-26-210203
- Form 30001193125-26-210206
- Form 30001193125-26-210209
- 20-F0001193125-26-193757
- 20-F0001193125-25-092142
- 20-F0001193125-24-111429
- SC 13G/A0001086364-24-006326
- 20-F0001193125-23-119772
- SC 13G/A0001306550-23-008593
- 20-F0001193125-22-125284
- SC 13G0000834237-22-008474
- 20-F0001564590-21-021578
- SC 13G/A0000834237-20-009604
- SC 13G/A0000895421-20-000400
- 20-F0001193125-20-121853
- SC 13G0000895421-20-000211
- SC 13G/A0000834237-20-006943
- 20-F0001193125-19-117861
- SC 13G/A0000315066-19-001398
- SC 13G/A0000215457-19-005862
- SC 13G0000315066-18-001623
- SC 13G0000215457-18-004457
- SC 13G/A0001086364-11-004244
- SC 13G0001086364-10-008648
- 20-F/A0001193125-06-027814
- SC 13G0000919574-03-000740
- SC 13G0000919574-03-000352
- 424B59999999997-02-014185
- 424B59999999997-02-014189
- SC 13G0000903954-01-500008
- SC 13D/A0000891618-00-002713
- SC 13D/A0000891618-99-005382
- SC 13D/A0001012870-97-000396
Authoritative source
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