United Microelectronics Corp (UMC) SEC Filings
Browse and analyze financial disclosures, corporate filings, and regulatory documents.
Financial Reports (10-Q, 10-K)
Current Reports (8-K)
Ownership
SC 13G/A
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
Feb 05, 2024
SC 13G/A
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
Feb 10, 2023
SC 13G/A
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
Jun 09, 2020
SC 13G/A
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
Jun 09, 2020
SC 13G/A
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
Feb 06, 2020
SC 13G/A
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
Feb 06, 2020
SC 13G/A
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
Feb 13, 2019
SC 13G/A
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
Feb 06, 2019
SC 13G/A
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
Feb 06, 2019
Prospectuses & Registrations
Proxy Statements
Other Filings
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 20, 2025
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 11, 2025
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 26, 2025
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 11, 2025
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 21, 2025
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 10, 2025
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 27, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 18, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 11, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 25, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 14, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 13, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 30, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 22, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 09, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 12, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 19, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 09, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 31, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 17, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 12, 2024
SD
Form SD - Specialized disclosure report
May 31, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 30, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 23, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 14, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 25, 2024
20-F
Form 20-F - Annual and transition report of foreign private issuers [Sections 13 or 15(d)]
Apr 25, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 24, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 16, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 03, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 25, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 25, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 22, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 27, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 26, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 31, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 26, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 25, 2024
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 26, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 27, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 14, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 25, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 25, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 25, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 22, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 26, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 25, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 26, 2023
SD
Form SD - Specialized disclosure report
May 31, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 31, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 25, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 15, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 27, 2023
20-F
Form 20-F - Annual and transition report of foreign private issuers [Sections 13 or 15(d)]
Apr 27, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 26, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 25, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 27, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 20, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 24, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 22, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 30, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 17, 2023
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 27, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 25, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 15, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 26, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 25, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 26, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 26, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 25, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 27, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 25, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 27, 2022
SD
Form SD - Specialized disclosure report
May 27, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 27, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 25, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 24, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 28, 2022
20-F
Form 20-F - Annual and transition report of foreign private issuers [Sections 13 or 15(d)]
Apr 28, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 27, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 26, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 25, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 06, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 25, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 15, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 24, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 14, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 27, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 25, 2022
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 27, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 26, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 17, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 27, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 25, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 27, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 03, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 25, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 10, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 28, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 26, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 07, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 29, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 25, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 17, 2021
SD
Form SD - Specialized disclosure report
May 28, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 25, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 21, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 05, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 04, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 29, 2021
20-F
Form 20-F - Annual and transition report of foreign private issuers [Sections 13 or 15(d)]
Apr 29, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 28, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 25, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 15, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 24, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 27, 2021
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 28, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 25, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 12, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 09, 2020
CORRESP
Form CORRESP - Correspondence
Nov 06, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 29, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 26, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 21, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 25, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 03, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 25, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 29, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 27, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 29, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 12, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 10, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 05, 2020
SD
Form SD -
May 29, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 26, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 12, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 28, 2020
20-F
Form 20-F - Annual and transition report of foreign private issuers [Sections 13 or 15(d)]
Apr 28, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 27, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 25, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 10, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 26, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 05, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 30, 2020
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 26, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 25, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 04, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 30, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 28, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 30, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 25, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 25, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 27, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 31, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 24, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jul 22, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 25, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 19, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jun 12, 2019
SD
Form SD -
May 31, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 28, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
May 08, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 25, 2019
20-F
Form 20-F - Annual and transition report of foreign private issuers [Sections 13 or 15(d)]
Apr 25, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Apr 24, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 26, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 22, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 18, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Mar 06, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Feb 25, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 29, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Jan 25, 2019
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 26, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Dec 18, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 26, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 13, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 06, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 05, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Nov 02, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Oct 24, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Sep 26, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 27, 2018
6-K
Form 6-K - Report of foreign issuer [Rules 13a-16 and 15d-16]
Aug 20, 2018
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