<SEC-DOCUMENT>0001193125-26-146257-index.html : 20260408
<SEC-HEADER>0001193125-26-146257.hdr.sgml : 20260408
<ACCEPTANCE-DATETIME>20260408060431
ACCESSION NUMBER:		0001193125-26-146257
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20260408
FILED AS OF DATE:		20260408
DATE AS OF CHANGE:		20260408

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITED MICROELECTRONICS CORP
		CENTRAL INDEX KEY:			0001033767
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				000000000
		STATE OF INCORPORATION:			F5
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15128
		FILM NUMBER:		26846413

	BUSINESS ADDRESS:	
		STREET 1:		8F, NO.68, SEC. 1, NEIHU RD.,
		CITY:			TAIPEI
		STATE:			F5
		ZIP:			11493
		BUSINESS PHONE:		886-2-2658-9168

	MAIL ADDRESS:	
		STREET 1:		8F, NO.68, SEC. 1, NEIHU RD.,
		CITY:			TAIPEI
		STATE:			F5
		ZIP:			11493
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>6k_on_04082026.htm
<DESCRIPTION>6-K
<TEXT>
Document 1 - file: 6k_on_04082026.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>umc-ex99_1.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: umc-ex99_1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>img208044986_0.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: img208044986_0.jpg

</DOCUMENT>
</SEC-DOCUMENT>