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 253 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	$153.26M 23,615,041 shares	0.00%	+657.23K(+2.90%)Added	SEC filing ↗ Feb 7, 2025	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$103.50M 15,947,754 shares	0.00%	+750.47K(+4.90%)Added	SEC filing ↗ Feb 11, 2025	▾
03	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$93.00M 14,329,393 shares	0.08%	+13.88M(+3,091.80%)Added	SEC filing ↗ Feb 14, 2025	▾
04	UBS Group AG CIK 1610520 · View history	$62.20M 9,584,049 shares	0.01%	+2.30M(+31.60%)Added	SEC filing ↗ Feb 14, 2025	▾
05	MORGAN STANLEY CIK 895421 · Amended · View history	$49.67M 7,653,337 shares	0.00%	-6.85M(-47.20%)Reduced	SEC filing ↗ May 15, 2025	▾
06	Fisher Asset Management, LLC CIK 850529 · View history	$47.38M 7,300,362 shares	0.02%	+237.02K(+3.40%)Added	SEC filing ↗ Feb 5, 2025	▾
07	Rafferty Asset Management, LLC CIK 1389426 · View history	$40.08M 6,175,738 shares	0.14%	-309.76K(-4.80%)Reduced	SEC filing ↗ Feb 14, 2025	▾
08	CITIGROUP INC CIK 831001 · View history	$37.86M 5,834,355 shares	0.04%	+1.42M(+32.00%)Added	SEC filing ↗ Feb 12, 2025	▾
09	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$33.22M 5,117,944 shares	0.01%	+510.76K(+11.10%)Added	SEC filing ↗ Feb 11, 2025	▾
10	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$32.38M 4,988,983 shares	0.00%	-4.39M(-46.80%)Reduced	SEC filing ↗ Feb 14, 2025	▾
11	STATE STREET CORP CIK 93751 · View history	$25.13M 3,871,728 shares	0.00%	+210.10K(+5.70%)Added	SEC filing ↗ Feb 14, 2025	▾
12	SCHRODER INVESTMENT MANAGEMENT GROUP CIK 1086619 · View history	$23.32M 3,582,458 shares	0.02%	-2.23K(-0.10%)Reduced	SEC filing ↗ Feb 12, 2025	▾
13	BARCLAYS PLC CIK 312069 · Amended · View history	$23.03M 3,547,867 shares	0.01%	+341.94K(+10.70%)Added	SEC filing ↗ Mar 19, 2026	▾
14	MARSHALL WACE, LLP CIK 1318757 · View history	$21.91M 3,375,268 shares	0.03%	-4.46M(-56.90%)Reduced	SEC filing ↗ Feb 13, 2025	▾
15	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$21.58M 3,325,398 shares	0.05%	-3.89M(-53.90%)Reduced	SEC filing ↗ Feb 14, 2025	▾
16	NORTHERN TRUST CORP CIK 73124 · View history	$20.67M 3,184,444 shares	0.00%	+2.24M(+238.80%)Added	SEC filing ↗ Feb 14, 2025	▾
17	Qube Research & Technologies Ltd CIK 1729829 · View history	$17.39M 2,679,214 shares	0.03%	+1.16M(+76.30%)Added	SEC filing ↗ Feb 14, 2025	▾
18	CITADEL ADVISORS LLC CIK 1423053 · View history	$17.04M 2,625,951 shares	0.02%	+1.37M(+108.50%)Added	SEC filing ↗ Feb 14, 2025	▾
19	JPMORGAN CHASE & CO CIK 19617 · View history	$13.12M 2,021,849 shares	0.00%	+1.22M(+150.80%)Added	SEC filing ↗ Feb 12, 2025	▾
20	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$12.77M 1,967,384 shares	0.02%	+1.97MNew	SEC filing ↗ Feb 13, 2025	▾

Showing 20 / 253 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

253

Cancelled or null records excluded

Disclosed shares

160,432,301

Not deduplicated across managers

Disclosed value

$1.04B

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 2024

Explore all 253 reporting institutions.

This page includes 20 of 253 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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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.