United Microelectronics Ownership | Who Owns United Microelectronics?

United Microelectronics Ownership Summary

United Microelectronics is owned by 1.88% institutional investors, and 98.12% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 1.10% of UMC shares. iShares Semiconductor ETF is the top mutual fund, with 0.53% of its assets in United Microelectronics shares.

UMC Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	United Microelectronics	1.88%	-	98.12%
Sector	Technology Stocks	37.01%	14.89%	48.10%
Idea	Semiconductor Stocks List	48.16%	6.95%	44.89%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	27.50M	1.10%	$246.91M
Aqr capital management	14.71M	0.59%	$132.13M
Vanguard group	13.52M	0.54%	$106.30M
Two sigma investments, lp	9.66M	0.39%	$86.71M
Morgan stanley	8.78M	0.35%	$78.83M
Ubs group	8.18M	0.33%	$73.41M
Acadian asset management	8.12M	0.33%	$72.94M
Goldman sachs group	5.87M	0.24%	$52.76M
Man group	5.73M	0.23%	$51.45M
Qube research	5.10M	0.20%	$45.81M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Genesis investment management, llp	1.01M	7.19%	$6.55B
Matthews capital management	977.64K	3.56%	$8.78M
Symmetry peak management	50.00K	0.77%	$438.00K
West family investments	125.32K	0.39%	$1.13M
North of south capital llp	405.07K	0.33%	$3.64M
Moran wealth management	910.42K	0.25%	$8.18M
Haven private	49.05K	0.19%	$440.47K
Ridgewood investments	50.69K	0.19%	$455.21K
Rafferty asset management	4.98M	0.18%	$44.75M
Cogentblue wealth advisors	29.76K	0.18%	$267.23K

Top Buyers

Holder	Shares	% Assets	Change
Acadian asset management	8.12M	0.10%	5.83M
Aqr capital management	14.71M	0.06%	5.25M
Qube research	5.10M	0.05%	4.84M
Two sigma investments, lp	9.66M	0.07%	3.98M
Man group	5.73M	0.09%	3.60M

Top Sellers

Holder	Shares	% Assets	Change
Fisher asset management	-	-	-7.30M
Marshall wace, llp	205.41K	0.00%	-4.53M
Schroder investment management group	293.10K	0.00%	-3.81M
Genesis investment management, llp	1.01M	7.19%	-3.34M
Maple rock capital partners	-	-	-3.14M

New Positions

Holder	Shares	% Assets	Change	Value
Renaissance	1.97M	0.02%	1.97M	$12.77M
Matthews capital management	977.64K	3.56%	977.64K	$8.78M
Vanguard fiduciary trust	440.57K	0.00%	440.57K	$3.96M
Capstone investment advisors	364.17K	0.01%	364.17K	$3.27M
Nomura	334.00K	0.00%	334.00K	$2.17M

Sold Out

Holder	Change
Lynx investment advisory	-26.00
High note wealth	-28.00
Carolina wealth advisors	-30.00
Yhb investment advisors	-32.00
Van hulzen asset management	-47.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	182	-35.46%	46,905,117	-69.21%	1	5.05%	115	-35.03%	32	-42.86%
Dec 31, 2025	191	-23.29%	95,959,914	-27.44%	3	13.70%	118	-3.28%	38	-55.81%
Sep 30, 2025	239	0.84%	132,116,209	9.28%	5	564.21%	115	-14.18%	85	30.77%
Jun 30, 2025	243	-2.02%	150,941,101	-2.40%	1	78.79%	134	0.75%	69	4.55%
Mar 31, 2025	4	-98.46%	508,584	-99.68%	-	0.25%	1	-99.11%	-	-100.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Semiconductor ETF	13.43M	0.53%	134.94K
Vanguard Emerging Mkts Stock Idx Inv	5.95M	0.24%	-251.49K
State Street® SPDR® Portfolio EM ETF	4.46M	0.18%	-
Direxion Daily Semicondct Bull 3X ETF	4.39M	0.17%	398.50K
SPDR® Portfolio Emerging Markets ETF	3.85M	0.15%	-
Vanguard Global Minimum Volatility Admr	2.76M	0.11%	-982.98K
Vanguard FTSE All-Wld ex-US ETF	2.15M	0.09%	-
Freedom 100 Emerging Markets ETF	1.82M	0.07%	3.80K
Dimensional All Country ex US LgCap Core	1.63M	0.07%	34.11K
YieldMax Semiconductor Port Opt Inc ETF	1.46M	0.06%	-

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	-

UMC Ownership FAQ

Who owns the most shares of United Microelectronics?

United Microelectronics’s largest shareholders are Blackrock funding, inc. /de (27.5M shares, 1.10%), Aqr capital management (14.71M shares, 0.59%), and Vanguard group (13.52M shares, 0.54%). Together, they hold 2.23% of United Microelectronics’s total shares outstanding.

Does Blackrock own United Microelectronics?

BlackRock is not among the top 10 institutional shareholders of United Microelectronics.

Who is United Microelectronics’s biggest shareholder by percentage of total assets invested?

Genesis investment management, llp is United Microelectronics’s biggest shareholder by percentage of total assets invested, with 7.19% of its assets in 1.01M United Microelectronics shares, valued at 6.55B$.

Who is the top mutual fund holder of United Microelectronics shares?

iShares Semiconductor ETF is the top mutual fund holder of United Microelectronics shares, with 0.53% of its total shares outstanding invested in 13.43M United Microelectronics shares.

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