Company · Ownership research

UNITED MICROELECTRONICS CORP UMC

CIK 0001033767 · CUSIP 910873405

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 910873405 (UMC), not CUSIP 910873955 (UMC), CUSIP 910873905 (UMC), and does not merge CUSIPs.

This page lists the top 20 of 241 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$182.99M 24,140,761 shares	0.00%	-176.30K(-0.70%)Reduced	SEC filing ↗ Nov 12, 2025	▾
02	MORGAN STANLEY CIK 895421 · Amended · View history	$165.63M 21,851,367 shares	0.01%	+37.24K(+0.20%)Added	SEC filing ↗ May 27, 2026	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$108.03M 14,252,440 shares	0.00%	-573.03K(-3.90%)Reduced	SEC filing ↗ Nov 7, 2025	▾
04	BANK OF AMERICA CORP /DE/ CIK 70858 · Amended · View history	$56.01M 7,388,868 shares	0.00%	+344.42K(+4.90%)Added	SEC filing ↗ Feb 3, 2026	▾
05	Rafferty Asset Management, LLC CIK 1389426 · View history	$47.15M 6,220,701 shares	0.15%	-2.18M(-26.00%)Reduced	SEC filing ↗ Nov 12, 2025	▾
06	STATE STREET CORP CIK 93751 · View history	$34.34M 4,529,776 shares	0.00%	+236.82K(+5.50%)Added	SEC filing ↗ Nov 14, 2025	▾
07	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$33.44M 4,411,850 shares	0.00%	-1.17M(-21.00%)Reduced	SEC filing ↗ Nov 14, 2025	▾
08	SCHRODER INVESTMENT MANAGEMENT GROUP CIK 1086619 · View history	$31.52M 4,152,929 shares	0.02%	-84.86K(-2.00%)Reduced	SEC filing ↗ Nov 13, 2025	▾
09	BARCLAYS PLC CIK 312069 · Amended · View history	$30.90M 4,076,004 shares	0.01%	-1.18M(-22.50%)Reduced	SEC filing ↗ Mar 31, 2026	▾
10	UBS Group AG CIK 1610520 · View history	$28.52M 3,762,035 shares	0.01%	-13.13M(-77.70%)Reduced	SEC filing ↗ Nov 13, 2025	▾
11	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$26.76M 3,530,564 shares	0.04%	+3.15M(+832.50%)Added	SEC filing ↗ Nov 14, 2025	▾
12	NORTHERN TRUST CORP CIK 73124 · View history	$25.99M 3,428,986 shares	0.00%	-187.45K(-5.20%)Reduced	SEC filing ↗ Nov 14, 2025	▾
13	MARSHALL WACE, LLP CIK 1318757 · View history	$21.23M 2,801,405 shares	0.02%	+2.80MNew	SEC filing ↗ Nov 13, 2025	▾
14	CITIGROUP INC CIK 831001 · View history	$17.40M 2,295,246 shares	0.01%	-1.43M(-38.40%)Reduced	SEC filing ↗ Nov 10, 2025	▾
15	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$15.80M 2,084,585 shares	0.00%	+340.97K(+19.60%)Added	SEC filing ↗ Nov 12, 2025	▾
16	Creative Planning CIK 1540235 · View history	$13.99M 1,845,971 shares	0.01%	+156.43K(+9.30%)Added	SEC filing ↗ Nov 14, 2025	▾
17	TWO SIGMA ADVISERS, LP CIK 1478735 · View history	$12.20M 1,609,700 shares	0.02%	+1.60M(+13,658.10%)Added	SEC filing ↗ Nov 14, 2025	▾
18	BNP PARIBAS FINANCIAL MARKETS CIK 1166588 · View history	$11.34M 1,496,318 shares	0.01%	+10.31K(+0.70%)Added	SEC filing ↗ Nov 13, 2025	▾
19	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$7.37M 971,846 shares	0.00%	-473.63K(-32.80%)Reduced	SEC filing ↗ Nov 14, 2025	▾
20	RHUMBLINE ADVISERS CIK 1115418 · View history	$5.48M 722,523 shares	0.00%	+6.19K(+0.90%)Added	SEC filing ↗ Nov 6, 2025	▾

Showing 20 / 241 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

241

Cancelled or null records excluded

Disclosed shares

132,565,951

Not deduplicated across managers

Disclosed value

$1.00B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

UNITED MICROELECTRONICS CORP · Q3 2025

Explore all 241 reporting institutions.

This page includes 20 of 241 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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{"action":"holders","cusip":"910873405","quarter":"2025Q3","type":"positions","page_size":100}

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.