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 270 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

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	$212.09M 26,983,515 shares	0.00%	+2.84M(+11.80%)Added	SEC filing ↗ Feb 12, 2026	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$106.30M 13,524,036 shares	0.00%	-728.40K(-5.10%)Reduced	SEC filing ↗ Jan 29, 2026	▾
03	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$74.39M 9,464,312 shares	0.04%	+8.49M(+873.80%)Added	SEC filing ↗ Feb 17, 2026	▾
04	MORGAN STANLEY CIK 895421 · Amended · View history	$60.28M 7,668,830 shares	0.00%	-14.18M(-64.90%)Reduced	SEC filing ↗ May 27, 2026	▾
05	Rafferty Asset Management, LLC CIK 1389426 · View history	$50.92M 6,477,830 shares	0.18%	+257.13K(+4.10%)Added	SEC filing ↗ Feb 13, 2026	▾
06	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$44.61M 5,675,393 shares	0.07%	+2.14M(+60.80%)Added	SEC filing ↗ Feb 17, 2026	▾
07	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$44.05M 5,603,690 shares	0.00%	-1.79M(-24.20%)Reduced	SEC filing ↗ Feb 17, 2026	▾
08	BARCLAYS PLC CIK 312069 · View history	$43.32M 5,511,784 shares	0.02%	+1.44M(+35.20%)Added	SEC filing ↗ Feb 13, 2026	▾
09	STATE STREET CORP CIK 93751 · View history	$37.95M 4,828,090 shares	0.00%	+298.31K(+6.60%)Added	SEC filing ↗ Feb 13, 2026	▾
10	MARSHALL WACE, LLP CIK 1318757 · View history	$37.25M 4,739,326 shares	0.04%	+1.94M(+69.20%)Added	SEC filing ↗ Feb 13, 2026	▾
11	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$37.15M 4,725,906 shares	0.01%	+314.06K(+7.10%)Added	SEC filing ↗ Mar 25, 2026	▾
12	UBS Group AG CIK 1610520 · View history	$35.92M 4,570,447 shares	0.01%	+808.41K(+21.50%)Added	SEC filing ↗ Jan 29, 2026	▾
13	SCHRODER INVESTMENT MANAGEMENT GROUP CIK 1086619 · View history	$32.68M 4,104,976 shares	0.03%	-47.95K(-1.20%)Reduced	SEC filing ↗ Feb 13, 2026	▾
14	TWO SIGMA ADVISERS, LP CIK 1478735 · View history	$27.11M 3,449,200 shares	0.05%	+1.84M(+114.30%)Added	SEC filing ↗ Feb 17, 2026	▾
15	NORTHERN TRUST CORP CIK 73124 · View history	$25.29M 3,217,883 shares	0.00%	-211.10K(-6.20%)Reduced	SEC filing ↗ Feb 17, 2026	▾
16	CITIGROUP INC CIK 831001 · View history	$23.65M 3,008,360 shares	0.02%	+713.11K(+31.10%)Added	SEC filing ↗ Feb 13, 2026	▾
17	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$19.78M 2,516,726 shares	0.00%	+432.14K(+20.70%)Added	SEC filing ↗ Feb 12, 2026	▾
18	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$18.05M 2,297,586 shares	0.03%	+2.27M(+8,248.50%)Added	SEC filing ↗ Feb 10, 2026	▾
19	Creative Planning CIK 1540235 · View history	$16.98M 2,160,185 shares	0.01%	+314.21K(+17.00%)Added	SEC filing ↗ Feb 17, 2026	▾
20	Man Group plc CIK 1637460 · View history	$16.69M 2,123,977 shares	0.03%	+1.64M(+340.20%)Added	SEC filing ↗ Feb 17, 2026	▾

Showing 20 / 270 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

270

Cancelled or null records excluded

Disclosed shares

151,091,055

Not deduplicated across managers

Disclosed value

$1.19B

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 · Q4 2025

Explore all 270 reporting institutions.

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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.