# United Microelectronics Corp: filings

UMC · NYSE · CIK 1033767 · [Technology](/sectors/technology.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/umc.md) · [Financials](/companies/umc/financials.md) · [Filings](/companies/umc/filings.md) · [Insiders](/companies/umc/insiders.md)

## Reports and events: 474 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (6-K 456, 3 30, UPLOAD 20, 20-F 18, SD 13, CORRESP 11, SC 13G/A 8, 4 5, SC 13G 4, 6-K/A 3, F-6 POS 2, S-8 2, EFFECT 1, F-6 1, F-6EF 1, SCHEDULE 13G/A 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-28 | 06:04 ET | [6-K](/filings/0001193125-26-435003.md) | Report of a foreign private issuer, period 2026-10-28 | 0001193125-26-435003 |
| 2026-10-28 | 06:01 ET | [6-K](/filings/0001193125-26-434992.md) | Report of a foreign private issuer, period 2026-10-28 | 0001193125-26-434992 |
| 2026-10-23 | 06:00 ET | [6-K](/filings/0001193125-26-429369.md) | Report of a foreign private issuer, period 2026-10-23 | 0001193125-26-429369 |
| 2026-10-13 | 06:01 ET | [6-K](/filings/0001193125-26-419602.md) | Report of a foreign private issuer, period 2026-10-13 | 0001193125-26-419602 |
| 2026-10-06 | 06:02 ET | [6-K](/filings/0001193125-26-414888.md) | Report of a foreign private issuer, period 2026-10-06 | 0001193125-26-414888 |
| 2026-10-05 | 09:27 ET | [6-K](/filings/0001193125-26-413371.md) | Report of a foreign private issuer, period 2026-10-05 | 0001193125-26-413371 |
| 2026-09-29 | 06:03 ET | [6-K](/filings/0001193125-26-405903.md) | Report of a foreign private issuer, period 2026-09-29 | 0001193125-26-405903 |
| 2026-09-04 | 06:03 ET | [6-K](/filings/0001193125-26-382689.md) | Report of a foreign private issuer, period 2026-09-04 | 0001193125-26-382689 |
| 2026-09-02 | 06:03 ET | [6-K](/filings/0001193125-26-379275.md) | Report of a foreign private issuer, period 2026-09-02 | 0001193125-26-379275 |
| 2026-08-26 | 06:20 ET | [6-K](/filings/0001193125-26-365826.md) | Report of a foreign private issuer, period 2026-08-26 | 0001193125-26-365826 |
| 2026-08-14 | 06:02 ET | [6-K](/filings/0001193125-26-350180.md) | Report of a foreign private issuer, period 2026-08-14 | 0001193125-26-350180 |
| 2026-08-06 | 06:02 ET | [6-K](/filings/0001193125-26-336498.md) | Report of a foreign private issuer, period 2026-08-06 | 0001193125-26-336498 |
| 2026-08-05 | 06:01 ET | [6-K](/filings/0001193125-26-333718.md) | Report of a foreign private issuer, period 2026-08-05 | 0001193125-26-333718 |
| 2026-07-30 | 06:01 ET | [6-K](/filings/0001193125-26-324785.md) | Report of a foreign private issuer, period 2026-07-30 | 0001193125-26-324785 |
| 2026-07-29 | 06:15 ET | [6-K](/filings/0001193125-26-322030.md) | Report of a foreign private issuer, period 2026-07-29 | 0001193125-26-322030 |
| 2026-07-29 | 06:13 ET | [6-K](/filings/0001193125-26-322027.md) | Report of a foreign private issuer, period 2026-07-29 | 0001193125-26-322027 |
| 2026-07-21 | 06:03 ET | [6-K](/filings/0001193125-26-309462.md) | Report of a foreign private issuer, period 2026-07-21 | 0001193125-26-309462 |
| 2026-07-15 | 06:01 ET | [6-K](/filings/0001193125-26-303966.md) | Report of a foreign private issuer, period 2026-07-15 | 0001193125-26-303966 |
| 2026-07-14 | 06:15 ET | [6-K](/filings/0001193125-26-302459.md) | Report of a foreign private issuer, period 2026-07-14 | 0001193125-26-302459 |
| 2026-07-06 | 06:01 ET | [6-K](/filings/0001193125-26-295459.md) | Report of a foreign private issuer, period 2026-07-06 | 0001193125-26-295459 |
| 2026-06-29 | 06:02 ET | [6-K](/filings/0001193125-26-286731.md) | Report of a foreign private issuer, period 2026-06-29 | 0001193125-26-286731 |
| 2026-06-23 | 06:02 ET | [6-K](/filings/0001193125-26-278424.md) | Report of a foreign private issuer, period 2026-06-23 | 0001193125-26-278424 |
| 2026-06-22 | 06:03 ET | [6-K](/filings/0001193125-26-276606.md) | Report of a foreign private issuer, period 2026-06-22 | 0001193125-26-276606 |
| 2026-06-18 | 06:01 ET | [6-K](/filings/0001193125-26-274873.md) | Report of a foreign private issuer, period 2026-06-18 | 0001193125-26-274873 |
| 2026-06-16 | 06:02 ET | [6-K](/filings/0001193125-26-271747.md) | Report of a foreign private issuer, period 2026-06-16 | 0001193125-26-271747 |
| 2026-06-05 | 06:02 ET | [6-K](/filings/0001193125-26-258291.md) | Report of a foreign private issuer, period 2026-06-05 | 0001193125-26-258291 |
| 2026-06-03 | 06:02 ET | [6-K](/filings/0001193125-26-254481.md) | Report of a foreign private issuer, period 2026-06-03 | 0001193125-26-254481 |
| 2026-05-27 | 06:01 ET | [6-K](/filings/0001193125-26-240337.md) | Report of a foreign private issuer, period 2026-05-27 | 0001193125-26-240337 |
| 2026-05-22 | 06:02 ET | [6-K](/filings/0001193125-26-235406.md) | Report of a foreign private issuer, period 2026-05-22 | 0001193125-26-235406 |
| 2026-05-20 | 06:01 ET | [6-K](/filings/0001193125-26-231655.md) | Report of a foreign private issuer, period 2026-05-20 | 0001193125-26-231655 |
| 2026-05-15 | 06:00 ET | [6-K](/filings/0001193125-26-225017.md) | Report of a foreign private issuer, period 2026-05-15 | 0001193125-26-225017 |
| 2026-05-13 | 06:29 ET | [6-K](/filings/0001193125-26-220535.md) | Report of a foreign private issuer, period 2026-05-13 | 0001193125-26-220535 |
| 2026-05-12 | 06:12 ET | [6-K](/filings/0001193125-26-218058.md) | Report of a foreign private issuer, period 2026-05-12 | 0001193125-26-218058 |
| 2026-05-11 | 06:01 ET | [6-K](/filings/0001193125-26-215564.md) | Report of a foreign private issuer, period 2026-05-11 | 0001193125-26-215564 |
| 2026-05-08 | 06:01 ET | [6-K](/filings/0001193125-26-213164.md) | Report of a foreign private issuer, period 2026-05-08 | 0001193125-26-213164 |
| 2026-05-07 | 06:00 ET | [6-K](/filings/0001193125-26-210117.md) | Report of a foreign private issuer, period 2026-05-07 | 0001193125-26-210117 |
| 2026-04-30 | 06:10 ET | [6-K](/filings/0001193125-26-193804.md) | Report of a foreign private issuer, period 2026-04-30 | 0001193125-26-193804 |
| 2026-04-30 | 06:04 ET | [20-F](/filings/0001193125-26-193757.md) | Annual report of a foreign private issuer, period 2025-12-31 | 0001193125-26-193757 |
| 2026-04-29 | 06:06 ET | [6-K](/filings/0001193125-26-188808.md) | Report of a foreign private issuer, period 2026-04-29 | 0001193125-26-188808 |
| 2026-04-29 | 06:04 ET | [6-K](/filings/0001193125-26-188788.md) | Report of a foreign private issuer, period 2026-04-29 | 0001193125-26-188788 |
| 2026-04-21 | 06:03 ET | [6-K](/filings/0001193125-26-164977.md) | Report of a foreign private issuer, period 2026-04-21 | 0001193125-26-164977 |
| 2026-04-15 | 06:01 ET | [6-K](/filings/0001193125-26-155859.md) | Report of a foreign private issuer, period 2026-04-15 | 0001193125-26-155859 |
| 2026-04-08 | 06:04 ET | [6-K](/filings/0001193125-26-146257.md) | Report of a foreign private issuer, period 2026-04-08 | 0001193125-26-146257 |
| 2026-03-26 | 06:07 ET | [6-K](/filings/0001193125-26-124974.md) | Report of a foreign private issuer, period 2026-03-26 | 0001193125-26-124974 |
| 2026-03-12 | 06:38 ET | [6-K](/filings/0001193125-26-103006.md) | Report of a foreign private issuer, period 2026-03-12 | 0001193125-26-103006 |
| 2026-03-05 | 06:00 ET | [6-K](/filings/0001193125-26-092413.md) | Report of a foreign private issuer, period 2026-03-05 | 0001193125-26-092413 |
| 2026-02-25 | 06:03 ET | [6-K](/filings/0001193125-26-068366.md) | Report of a foreign private issuer, period 2026-02-25 | 0001193125-26-068366 |
| 2026-02-25 | 06:00 ET | [6-K](/filings/0001193125-26-068351.md) | Report of a foreign private issuer, period 2026-02-25 | 0001193125-26-068351 |
| 2026-02-24 | 06:03 ET | [6-K](/filings/0001193125-26-065068.md) | Report of a foreign private issuer, period 2026-02-24 | 0001193125-26-065068 |
| 2026-02-13 | 06:02 ET | [6-K](/filings/0001193125-26-049677.md) | Report of a foreign private issuer, period 2026-02-13 | 0001193125-26-049677 |

Page 1 of 10. [Older](/companies/umc/filings.md?page=2)
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 28, 2026, 06:06 ET. No prices; not investment advice.