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United Microelectronics Corporation SEC filings

In the twelve months since 29 September 2025 United Microelectronics Corporation filed 63 documents with the SEC of the kinds listed here: 61 reports on Form 6-K; 1 conflict minerals report (SD), 1 annual report (foreign filer) (20-F). The latest, filed 4 September 2026: 6-K, no title given to edgar; the filing is linked.

FiledFormWhat it was aboutPeriod or event dateFiling
4 September 20266-Kno title given to EDGAR; the filing is linked4 September 2026EDGAR
2 September 20266-Kno title given to EDGAR; the filing is linked2 September 2026EDGAR
26 August 20266-Kno title given to EDGAR; the filing is linked26 August 2026EDGAR
14 August 20266-Kno title given to EDGAR; the filing is linked14 August 2026EDGAR
6 August 20266-Kno title given to EDGAR; the filing is linked6 August 2026EDGAR
5 August 20266-Kno title given to EDGAR; the filing is linked5 August 2026EDGAR
30 July 20266-Kno title given to EDGAR; the filing is linked30 July 2026EDGAR
29 July 20266-Kno title given to EDGAR; the filing is linked29 July 2026EDGAR
29 July 20266-Kno title given to EDGAR; the filing is linked29 July 2026EDGAR
21 July 20266-Kno title given to EDGAR; the filing is linked21 July 2026EDGAR
15 July 20266-Kno title given to EDGAR; the filing is linked15 July 2026EDGAR
14 July 20266-Kno title given to EDGAR; the filing is linked14 July 2026EDGAR
6 July 20266-Kno title given to EDGAR; the filing is linked6 July 2026EDGAR
29 June 20266-Kno title given to EDGAR; the filing is linked29 June 2026EDGAR
23 June 20266-Kno title given to EDGAR; the filing is linked23 June 2026EDGAR
22 June 20266-Kno title given to EDGAR; the filing is linked22 June 2026EDGAR
18 June 20266-Kno title given to EDGAR; the filing is linked18 June 2026EDGAR
16 June 20266-Kno title given to EDGAR; the filing is linked16 June 2026EDGAR
5 June 20266-Kno title given to EDGAR; the filing is linked5 June 2026EDGAR
3 June 20266-Kno title given to EDGAR; the filing is linked3 June 2026EDGAR
29 May 2026SDconflict minerals reportEDGAR
27 May 20266-Kno title given to EDGAR; the filing is linked27 May 2026EDGAR
22 May 20266-Kno title given to EDGAR; the filing is linked22 May 2026EDGAR
20 May 20266-Kno title given to EDGAR; the filing is linked20 May 2026EDGAR
15 May 20266-Kno title given to EDGAR; the filing is linked15 May 2026EDGAR
13 May 20266-Kno title given to EDGAR; the filing is linked13 May 2026EDGAR
12 May 20266-Kno title given to EDGAR; the filing is linked12 May 2026EDGAR
11 May 20266-Kno title given to EDGAR; the filing is linked11 May 2026EDGAR
8 May 20266-Kno title given to EDGAR; the filing is linked8 May 2026EDGAR
7 May 20266-Kno title given to EDGAR; the filing is linked7 May 2026EDGAR
30 April 20266-Kno title given to EDGAR; the filing is linked30 April 2026EDGAR
30 April 202620-Fannual report (foreign filer)31 December 2025EDGAR
29 April 20266-Kno title given to EDGAR; the filing is linked29 April 2026EDGAR
29 April 20266-Kno title given to EDGAR; the filing is linked29 April 2026EDGAR
21 April 20266-Kno title given to EDGAR; the filing is linked21 April 2026EDGAR
15 April 20266-Kno title given to EDGAR; the filing is linked15 April 2026EDGAR
8 April 20266-Kno title given to EDGAR; the filing is linked8 April 2026EDGAR
26 March 20266-Kno title given to EDGAR; the filing is linked26 March 2026EDGAR
12 March 20266-Kno title given to EDGAR; the filing is linked12 March 2026EDGAR
5 March 20266-Kno title given to EDGAR; the filing is linked5 March 2026EDGAR
25 February 20266-Kno title given to EDGAR; the filing is linked25 February 2026EDGAR
25 February 20266-Kno title given to EDGAR; the filing is linked25 February 2026EDGAR
24 February 20266-Kno title given to EDGAR; the filing is linked24 February 2026EDGAR
13 February 20266-Kno title given to EDGAR; the filing is linked13 February 2026EDGAR
5 February 20266-Kno title given to EDGAR; the filing is linked5 February 2026EDGAR
28 January 20266-Kno title given to EDGAR; the filing is linked28 January 2026EDGAR
14 January 20266-Kno title given to EDGAR; the filing is linked14 January 2026EDGAR
7 January 20266-Kno title given to EDGAR; the filing is linked7 January 2026EDGAR
30 December 20256-Kno title given to EDGAR; the filing is linked30 December 2025EDGAR
17 December 20256-Kno title given to EDGAR; the filing is linked17 December 2025EDGAR
10 December 20256-Kno title given to EDGAR; the filing is linked10 December 2025EDGAR
4 December 20256-Kno title given to EDGAR; the filing is linked4 December 2025EDGAR
28 November 20256-Kno title given to EDGAR; the filing is linked28 November 2025EDGAR
20 November 20256-Kno title given to EDGAR; the filing is linked20 November 2025EDGAR
12 November 20256-Kno title given to EDGAR; the filing is linked12 November 2025EDGAR
6 November 20256-Kno title given to EDGAR; the filing is linked6 November 2025EDGAR
29 October 20256-Kno title given to EDGAR; the filing is linked29 October 2025EDGAR
29 October 20256-Kno title given to EDGAR; the filing is linked29 October 2025EDGAR
28 October 20256-Kno title given to EDGAR; the filing is linked28 October 2025EDGAR
27 October 20256-Kno title given to EDGAR; the filing is linked27 October 2025EDGAR
21 October 20256-Kno title given to EDGAR; the filing is linked21 October 2025EDGAR
15 October 20256-Kno title given to EDGAR; the filing is linked15 October 2025EDGAR
7 October 20256-Kno title given to EDGAR; the filing is linked7 October 2025EDGAR

A foreign company listed in the US files a Form 6-K for what it publishes at home: results, share buybacks, directors' dealings, bond issues and notices. The 6-K carries no item numbers, so each is listed under the title the company gave EDGAR, where it gave one; the rest are linked to the filing itself. The annual report is the 20-F (or the 40-F for a Canadian filer). Form 144, 13F and Schedule 13D and 13G have their own pages; a foreign filer files no Form 4.

Source

The company's filing index on EDGAR, read from the SEC's submissions feed.

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