United Microelectronics Corp
UMCNYSECIK 1033767TechnologyFiscal year ends Dec 31
Reports and events: 474 filings
Newest first, by EDGAR acceptance time (Eastern). Each filing’s page lists its documents on sec.gov and, for 10-K and 10-Q reports, the extracted sections.
What the forms are: 10-K, 10-Q, 8-K, Form 4, DEF 14A, Schedule 13D, Schedule 13G, amendments, accession numbers.
| Filed | Form | What it is | Accession number |
|---|---|---|---|
| 2026-10-2806:04 ET | 6-K | Report of a foreign private issuerPeriod 2026-10-28 | 0001193125-26-435003 |
| 2026-10-2806:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-10-28 | 0001193125-26-434992 |
| 2026-10-2306:00 ET | 6-K | Report of a foreign private issuerPeriod 2026-10-23 | 0001193125-26-429369 |
| 2026-10-1306:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-10-13 | 0001193125-26-419602 |
| 2026-10-0606:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-10-06 | 0001193125-26-414888 |
| 2026-10-0509:27 ET | 6-K | Report of a foreign private issuerPeriod 2026-10-05 | 0001193125-26-413371 |
| 2026-09-2906:03 ET | 6-K | Report of a foreign private issuerPeriod 2026-09-29 | 0001193125-26-405903 |
| 2026-09-0406:03 ET | 6-K | Report of a foreign private issuerPeriod 2026-09-04 | 0001193125-26-382689 |
| 2026-09-0206:03 ET | 6-K | Report of a foreign private issuerPeriod 2026-09-02 | 0001193125-26-379275 |
| 2026-08-2606:20 ET | 6-K | Report of a foreign private issuerPeriod 2026-08-26 | 0001193125-26-365826 |
| 2026-08-1406:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-08-14 | 0001193125-26-350180 |
| 2026-08-0606:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-08-06 | 0001193125-26-336498 |
| 2026-08-0506:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-08-05 | 0001193125-26-333718 |
| 2026-07-3006:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-07-30 | 0001193125-26-324785 |
| 2026-07-2906:15 ET | 6-K | Report of a foreign private issuerPeriod 2026-07-29 | 0001193125-26-322030 |
| 2026-07-2906:13 ET | 6-K | Report of a foreign private issuerPeriod 2026-07-29 | 0001193125-26-322027 |
| 2026-07-2106:03 ET | 6-K | Report of a foreign private issuerPeriod 2026-07-21 | 0001193125-26-309462 |
| 2026-07-1506:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-07-15 | 0001193125-26-303966 |
| 2026-07-1406:15 ET | 6-K | Report of a foreign private issuerPeriod 2026-07-14 | 0001193125-26-302459 |
| 2026-07-0606:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-07-06 | 0001193125-26-295459 |
| 2026-06-2906:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-06-29 | 0001193125-26-286731 |
| 2026-06-2306:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-06-23 | 0001193125-26-278424 |
| 2026-06-2206:03 ET | 6-K | Report of a foreign private issuerPeriod 2026-06-22 | 0001193125-26-276606 |
| 2026-06-1806:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-06-18 | 0001193125-26-274873 |
| 2026-06-1606:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-06-16 | 0001193125-26-271747 |
| 2026-06-0506:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-06-05 | 0001193125-26-258291 |
| 2026-06-0306:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-06-03 | 0001193125-26-254481 |
| 2026-05-2706:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-05-27 | 0001193125-26-240337 |
| 2026-05-2206:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-05-22 | 0001193125-26-235406 |
| 2026-05-2006:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-05-20 | 0001193125-26-231655 |
| 2026-05-1506:00 ET | 6-K | Report of a foreign private issuerPeriod 2026-05-15 | 0001193125-26-225017 |
| 2026-05-1306:29 ET | 6-K | Report of a foreign private issuerPeriod 2026-05-13 | 0001193125-26-220535 |
| 2026-05-1206:12 ET | 6-K | Report of a foreign private issuerPeriod 2026-05-12 | 0001193125-26-218058 |
| 2026-05-1106:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-05-11 | 0001193125-26-215564 |
| 2026-05-0806:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-05-08 | 0001193125-26-213164 |
| 2026-05-0706:00 ET | 6-K | Report of a foreign private issuerPeriod 2026-05-07 | 0001193125-26-210117 |
| 2026-04-3006:10 ET | 6-K | Report of a foreign private issuerPeriod 2026-04-30 | 0001193125-26-193804 |
| 2026-04-3006:04 ET | 20-F | Annual report of a foreign private issuerPeriod 2025-12-31 | 0001193125-26-193757 |
| 2026-04-2906:06 ET | 6-K | Report of a foreign private issuerPeriod 2026-04-29 | 0001193125-26-188808 |
| 2026-04-2906:04 ET | 6-K | Report of a foreign private issuerPeriod 2026-04-29 | 0001193125-26-188788 |
| 2026-04-2106:03 ET | 6-K | Report of a foreign private issuerPeriod 2026-04-21 | 0001193125-26-164977 |
| 2026-04-1506:01 ET | 6-K | Report of a foreign private issuerPeriod 2026-04-15 | 0001193125-26-155859 |
| 2026-04-0806:04 ET | 6-K | Report of a foreign private issuerPeriod 2026-04-08 | 0001193125-26-146257 |
| 2026-03-2606:07 ET | 6-K | Report of a foreign private issuerPeriod 2026-03-26 | 0001193125-26-124974 |
| 2026-03-1206:38 ET | 6-K | Report of a foreign private issuerPeriod 2026-03-12 | 0001193125-26-103006 |
| 2026-03-0506:00 ET | 6-K | Report of a foreign private issuerPeriod 2026-03-05 | 0001193125-26-092413 |
| 2026-02-2506:03 ET | 6-K | Report of a foreign private issuerPeriod 2026-02-25 | 0001193125-26-068366 |
| 2026-02-2506:00 ET | 6-K | Report of a foreign private issuerPeriod 2026-02-25 | 0001193125-26-068351 |
| 2026-02-2406:03 ET | 6-K | Report of a foreign private issuerPeriod 2026-02-24 | 0001193125-26-065068 |
| 2026-02-1306:02 ET | 6-K | Report of a foreign private issuerPeriod 2026-02-13 | 0001193125-26-049677 |
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 28, 2026, 06:06 ET. Listed shows no prices and gives no investment advice.