UMC · United Microelectronics Corp · Shareholders & Ownership

$19.67 -0.41 (-2.04%) At close · Oct 20

Market Cap

$49.21B

2.51B

Volume · Oct 20 9.31M Avg daily vol (3M) 12.28M

Every disclosed holder of UMC in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns UMC

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: shares outstanding cannot be set against these holders.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	364	179,734,867	—	Yes
Insiders (Forms 3, 4, 5)	25	152,724,453	—	Yes
13D/G-only blocks	0	0	—	Yes
Registered funds (N-PORT, not summed)	61	40,121,323	—	No

% Out is unavailable: a foreign private issuer reports ordinary shares, a different unit from the listed shares.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of UMC

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Hung Chia-Tsung Insider CIK 2120082 · Mar 18, 2026 Director, Chairman & CSO, issuer-wide	64,511,327	—	—	Mar 18, 2026	Director, Chairman & CSO, issuer-wide
2	Wang Jason Shi Insider CIK 2120078 · Mar 18, 2026 Director, Chief Executive Officer, issuer-wide	32,655,440	—	—	Mar 18, 2026	Director, Chief Executive Officer, issuer-wide
3	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	31,544,454	—	+4,048,574	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	iShares Semiconductor ETF Fund S000004354 · Registered fund · Jun 30, 2026 iShares Trust, not summed	17,871,632	—	+4,875,513	Jun 30, 2026	iShares Trust, not summed
3.2	Diversified Equity Alpha Master Portfolio Fund S000004282 · Registered fund · Jun 30, 2026 Master Investment Portfolio, not summed	4,222	—	—	Jun 30, 2026	Master Investment Portfolio, not summed
3.3	BlackRock Sustainable Aware Advantage Emerging Markets Equity Fund Fund S000069108 · Registered fund · Jul 31, 2026 BlackRock Funds, not summed	928	—	-225	Jul 31, 2026	BlackRock Funds, not summed
4	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	11,632,967	—	+3,457,823	Jun 30, 2026	carried, not yet filed for the newest quarter
5	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	11,109,785	—	+5,234,921	Jun 30, 2026	carried, not yet filed for the newest quarter
6	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	10,181,208	—	+7,577,990	Jun 30, 2026	carried, not yet filed for the newest quarter
7	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	8,601,967	—	-386,476	Jun 30, 2026	carried, not yet filed for the newest quarter
8	Hsu Ming-Chih Insider CIK 2120083 · Mar 18, 2026 Director, President & COO, issuer-wide	8,403,220	—	—	Mar 18, 2026	Director, President & COO, issuer-wide
9	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	8,285,573	—	-492,330	Jun 30, 2026	carried, not yet filed for the newest quarter
10	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	7,718,125	—	-6,995,905	Jun 30, 2026	carried, not yet filed for the newest quarter
11	Rafferty Asset Management, LLC 13F CIK 1389426 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	7,653,378	—	+2,669,725	Jun 30, 2026	carried, not yet filed for the newest quarter
11.1	Direxion Daily Semiconductor Bull 3X Shares Fund S000027920 · Registered fund · Jul 31, 2026 Direxion Shares ETF Trust, not summed	6,372,415	—	+2,041,686	Jul 31, 2026	Direxion Shares ETF Trust, not summed
12	HUNG KUEI-CHUN Insider CIK 2133611 · Apr 29, 2026 SVP, issuer-wide	5,879,566	—	—	Apr 29, 2026	SVP, issuer-wide
13	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	5,753,245	—	-2,370,954	Jun 30, 2026	carried, not yet filed for the newest quarter
14	Man Group plc 13F CIK 1637460 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	5,593,427	—	-135,474	Jun 30, 2026	carried, not yet filed for the newest quarter
15	CITIGROUP INC 13F CIK 831001 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	5,414,362	—	+1,117,640	Jun 30, 2026	carried, not yet filed for the newest quarter
16	BARCLAYS PLC 13F CIK 312069 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	4,892,286	—	+153,419	Jun 30, 2026	carried, not yet filed for the newest quarter
17	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	4,878,124	—	-135,085	Jun 30, 2026	carried, not yet filed for the newest quarter
17.1	State Street(R) SPDR(R) Portfolio Emerging Markets ETF Fund S000014048 · Registered fund · Jun 30, 2026 SPDR INDEX SHARES FUNDS, not summed	4,268,708	—	-194,297	Jun 30, 2026	SPDR INDEX SHARES FUNDS, not summed
17.2	State Street(R) SPDR(R) MSCI ACWI ex-US ETF Fund S000014042 · Registered fund · Jun 30, 2026 SPDR INDEX SHARES FUNDS, not summed	245,331	—	+11,527	Jun 30, 2026	SPDR INDEX SHARES FUNDS, not summed
17.3	State Street(R) SPDR(R) S&P(R) Emerging Asia Pacific ETF Fund S000014046 · Registered fund · Jun 30, 2026 SPDR INDEX SHARES FUNDS, not summed	154,381	—	+11,020	Jun 30, 2026	SPDR INDEX SHARES FUNDS, not summed
17.4	State Street(R) SPDR(R) Portfolio MSCI Global Stock Market ETF Fund S000036082 · Registered fund · Jun 30, 2026 SPDR INDEX SHARES FUNDS, not summed	83,141	—	-19,595	Jun 30, 2026	SPDR INDEX SHARES FUNDS, not summed
18	CHANG OLIVER Insider CIK 2133550 · Apr 29, 2026 SVP, issuer-wide	4,819,289	—	—	Apr 29, 2026	SVP, issuer-wide
19	LIN MING-YU Insider CIK 2133704 · Apr 29, 2026 Vice President, issuer-wide	4,324,413	—	—	Apr 29, 2026	Vice President, issuer-wide
20	NEUBERGER BERMAN GROUP LLC 13F CIK 1465109 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	4,134,788	—	+4,020,723	Jun 30, 2026	carried, not yet filed for the newest quarter
21	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	3,986,872	—	+787,998	Jun 30, 2026	carried, not yet filed for the newest quarter
22	WU CHUNG-HSIEN Insider CIK 2133590 · Apr 29, 2026 CISO & SVP, issuer-wide	3,685,888	—	—	Apr 29, 2026	CISO & SVP, issuer-wide
23	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	3,660,899	—	+3,400,195	Jun 30, 2026	carried, not yet filed for the newest quarter
24	Liu Chitung Insider CIK 2120081 · Sep 17, 2026 CFO & SVP, issuer-wide	3,639,757	—	—	Sep 17, 2026	CFO & SVP, issuer-wide
25	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,218,824	—	+369,087	Jun 30, 2026	carried, not yet filed for the newest quarter
25.1	Dimensional Emerging Core Equity Market ETF Fund S000069434 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	994,000	—	+203,800	Jul 31, 2026	Dimensional ETF Trust, not summed
25.2	Dimensional Emerging Markets Core Equity 2 ETF Fund S000075149 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	844,666	—	+49,600	Jul 31, 2026	Dimensional ETF Trust, not summed
25.3	Dimensional Emerging Markets Value ETF Fund S000075157 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	618,706	—	+56,600	Jul 31, 2026	Dimensional ETF Trust, not summed
25.4	Dimensional Emerging Markets High Profitability ETF Fund S000075156 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	193,554	—	0	Jul 31, 2026	Dimensional ETF Trust, not summed
25.5	Dimensional Emerging Markets ex China Core Equity ETF Fund S000086503 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	90,831	—	-1,603	Jul 31, 2026	Dimensional ETF Trust, not summed
26	HU CHE-JEN Insider CIK 2133608 · Jun 30, 2026 Vice President, issuer-wide	3,214,080	—	-10,000	Jun 30, 2026	Vice President, issuer-wide
27	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,088,852	—	-6,566,550	Jun 30, 2026	carried, not yet filed for the newest quarter
28	CHENG TZYY-MING Insider CIK 2133595 · Apr 29, 2026 Vice President, issuer-wide	2,868,080	—	—	Apr 29, 2026	Vice President, issuer-wide
29	CHEN MING-TSUNG Insider CIK 2133571 · Apr 29, 2026 Vice President, issuer-wide	2,484,660	—	—	Apr 29, 2026	Vice President, issuer-wide
30	Creative Planning 13F CIK 1540235 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,450,717	—	+86,346	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Tidal Investments LLC 13F CIK 1600064 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,355,267	—	+759,116	Jun 30, 2026	carried, not yet filed for the newest quarter
32	CHEN JIN-SHUANG Insider CIK 2133551 · Apr 29, 2026 CHRO & VP, issuer-wide	2,343,080	—	—	Apr 29, 2026	CHRO & VP, issuer-wide
33	LIU SHIH-WEI Insider CIK 2133646 · Apr 29, 2026 Vice President, issuer-wide	2,183,080	—	—	Apr 29, 2026	Vice President, issuer-wide
34	YieldMax(R) Semiconductor Portfolio Option Income ETF Fund S000089004 · Registered fund · Jul 31, 2026 Tidal Trust II, not summed	2,168,207	—	+707,233	Jul 31, 2026	Tidal Trust II, not summed
35	HSU SHIH-CHIEH Insider CIK 2133603 · Apr 29, 2026 Vice President, issuer-wide	2,077,969	—	—	Apr 29, 2026	Vice President, issuer-wide
36	Empowered Funds, LLC 13F CIK 1592828 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,891,076	—	+1,891,076	Jun 30, 2026	carried, not yet filed for the newest quarter
37	Freedom 100 Emerging Markets ETF Fund S000065423 · Registered fund · Jun 30, 2026 EA Series Trust, not summed	1,891,076	—	+83,512	Jun 30, 2026	EA Series Trust, not summed
38	HSU SHU-FEN Insider CIK 2133605 · Apr 29, 2026 Vice President, issuer-wide	1,567,080	—	—	Apr 29, 2026	Vice President, issuer-wide
39	MATTHEWS INTERNATIONAL CAPITAL MANAGEMENT LLC 13F CIK 1028074 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,465,694	—	+488,049	Jun 30, 2026	carried, not yet filed for the newest quarter
39.1	Matthews Asia Innovators Fund Fund S000001034 · Registered fund · Jun 30, 2026 Matthews International Funds, not summed	487,118	—	+174,711	Jun 30, 2026	Matthews International Funds, not summed
39.2	Matthews Emerging Markets Equity Fund Fund S000068521 · Registered fund · Jun 30, 2026 Matthews International Funds, not summed	181,027	—	-115,750	Jun 30, 2026	Matthews International Funds, not summed
39.3	Matthews Asia Growth Fund Fund S000001035 · Registered fund · Jun 30, 2026 Matthews International Funds, not summed	177,978	—	—	Jun 30, 2026	Matthews International Funds, not summed
39.4	Matthews Asia Innovators Active ETF Fund S000076756 · Registered fund · Jun 30, 2026 Matthews International Funds, not summed	122,666	—	+79,862	Jun 30, 2026	Matthews International Funds, not summed
39.5	Matthews Emerging Markets Equity Active ETF Fund S000076755 · Registered fund · Jun 30, 2026 Matthews International Funds, not summed	30,553	—	-20,589	Jun 30, 2026	Matthews International Funds, not summed
40	TZOU SHIH-FANG Insider CIK 2133596 · Apr 29, 2026 Vice President, issuer-wide	1,462,188	—	—	Apr 29, 2026	Vice President, issuer-wide
41	Connor, Clark & Lunn Investment Management Ltd. 13F CIK 1596800 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,342,996	—	+632,913	Jun 30, 2026	carried, not yet filed for the newest quarter
42	SHEN YING-SHENG Insider CIK 2133822 · Apr 29, 2026 Vice President, issuer-wide	1,313,080	—	—	Apr 29, 2026	Vice President, issuer-wide
43	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,231,451	—	-1,531,631	Jun 30, 2026	carried, not yet filed for the newest quarter
44	CHUANG YU-CHIH Insider CIK 2133601 · Apr 29, 2026 Vice President, issuer-wide	1,213,274	—	—	Apr 29, 2026	Vice President, issuer-wide
45	LIN JEN-TSUNG Insider CIK 2133616 · Sep 22, 2026 Vice President, issuer-wide	1,172,140	—	-57,520	Sep 22, 2026	Vice President, issuer-wide
46	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	1,126,943	—	-454,936	Jun 30, 2026	carried, not yet filed for the newest quarter
47	E Fund Management Co., Ltd. 13F CIK 1842296 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	995,790	—	+995,790	Jun 30, 2026	carried, not yet filed for the newest quarter
48	KUO LIN-WU Insider CIK 2133612 · Apr 29, 2026 Vice President, issuer-wide	913,080	—	—	Apr 29, 2026	Vice President, issuer-wide
49	CAPITAL FUND MANAGEMENT S.A. 13F CIK 1323645 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	897,313	—	+151,975	Jun 30, 2026	carried, not yet filed for the newest quarter
50	NOMURA HOLDINGS INC 13F CIK 1163653 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	813,901	—	+813,901	Jun 30, 2026	carried, not yet filed for the newest quarter

3 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 411 holders

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Key facts CIK 1033767 CUSIP 910873405 13F (30d) 57 filings 52 filers Visit website Investor relations