UNITED MICROELECTRON-SP ADR (UMC) Institutional Shareholders
UNITED MICROELECTRON-SP ADR (UMC) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $4.80B in UMC holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of UMC tracked by InsiderSet, reporting ownership valued at approximately $858.32M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $771.89M, representing an estimated loss of -10.07% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 61% of the total disclosed UMC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Ubs Group Ag, Goldman Sachs Group Inc, and several other long-term asset managers with concentrated positions in UNITED MICROELECTRON-SP ADR (UMC).
This page ranks the largest institutional UMC shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
353
Total Reported Value
$4.80B
Largest Holder
Blackrock, Inc.
Largest Position
$858.32M
Insider Transactions (90d)
5
Latest Filing Quarter
Q2 2026
New Institutional Positions
75
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 31,544,454 | $858,324,604 | $771,892,789 | -$86,431,815 | -10.07% | |
| Ubs Group Ag | 0.05% | 11,632,967 | $316,533,032 | $284,658,702 | -$31,874,330 | -10.07% | |
| Goldman Sachs Group Inc | 0.03% | 11,109,785 | $302,297,238 | $271,856,439 | -$30,440,799 | -10.07% | |
| Bank Of America Corp | 0.02% | 10,181,208 | $277,030,677 | $249,134,160 | -$27,896,517 | -10.07% | |
| Vanguard Capital Management Llc | 0.01% | 8,601,967 | $234,059,522 | $210,490,132 | -$23,569,390 | -10.07% | |
| Morgan Stanley | 0.01% | 8,285,573 | $225,450,487 | $202,747,971 | -$22,702,516 | -10.07% | |
| Aqr Capital Management Llc | 0.07% | 7,718,125 | $210,010,182 | $188,862,519 | -$21,147,663 | -10.07% | |
| Rafferty Asset Management, Llc | 0.47% | 7,653,378 | $208,248,415 | $187,278,160 | -$20,970,255 | -10.07% | |
| Acadian Asset Management Llc | 0.19% | 5,753,245 | $156,530,000 | $140,781,905 | -$15,748,095 | -10.06% | |
| Man Group Plc | 0.28% | 5,593,427 | $152,197,149 | $136,871,159 | -$15,325,990 | -10.07% | |
| Citigroup Inc | 0.07% | 5,414,362 | $147,324,790 | $132,489,438 | -$14,835,352 | -10.07% | |
| Barclays Plc | 0.04% | 4,892,286 | $133,119,102 | $119,714,238 | -$13,404,864 | -10.07% | |
| State Street Corp | 0.00% | 4,878,124 | $132,733,754 | $119,367,694 | -$13,366,060 | -10.07% | |
| Neuberger Berman Group Llc | 0.07% | 4,134,788 | $111,021,785 | $101,178,262 | -$9,843,523 | -8.87% | |
| Northern Trust Corp | 0.01% | 3,986,872 | $108,482,786 | $97,558,758 | -$10,924,028 | -10.07% | |
| Jpmorgan Chase & Co | 0.01% | 3,660,899 | $98,258,528 | $89,582,199 | -$8,676,329 | -8.83% | |
| Dimensional Fund Advisors Lp | 0.02% | 3,218,824 | $87,584,195 | $78,764,623 | -$8,819,572 | -10.07% | |
| Two Sigma Investments, Lp | 0.06% | 3,088,852 | $84,047,663 | $75,584,208 | -$8,463,455 | -10.07% | |
| Tidal Investments Llc | 0.16% | 2,355,267 | $64,086,815 | $57,633,383 | -$6,453,432 | -10.07% | |
| Empowered Funds, Llc | 0.27% | 1,891,076 | $51,456,178 | $46,274,630 | -$5,181,548 | -10.07% | |
| Matthews International Capital Management Llc | 13.67% | 1,465,694 | $39,881,534 | $35,865,532 | -$4,016,002 | -10.07% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.07% | 1,342,996 | $36,542,921 | $32,863,112 | -$3,679,809 | -10.07% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,231,451 | $33,507,782 | $30,133,606 | -$3,374,176 | -10.07% | |
| Bnp Paribas Financial Markets | 0.02% | 1,126,943 | $30,664,119 | $27,576,295 | -$3,087,824 | -10.07% | |
| E Fund Management Co., Ltd. | 0.61% | 995,790 | $27,095,446 | $24,366,981 | -$2,728,465 | -10.07% | |
| Capital Fund Management S.A. | 0.17% | 897,313 | $24,415,886 | $21,957,249 | -$2,458,637 | -10.07% | |
| Nomura Holdings Inc | 0.09% | 813,901 | $22,146,246 | $19,916,157 | -$2,230,089 | -10.07% | |
| Quantinno Capital Management Lp | 0.03% | 791,129 | $21,526,626 | $19,358,927 | -$2,167,699 | -10.07% | |
| Bnp Paribas Asset Management Holding S.A. | 0.02% | 768,617 | $20,914,069 | $18,808,058 | -$2,106,011 | -10.07% | |
| Sg Americas Securities, Llc | 0.01% | 687,022 | $18,694,000 | $16,811,428 | -$1,882,572 | -10.07% | |
| Us Bancorp \De\ | 0.02% | 683,413 | $18,595,668 | $16,723,116 | -$1,872,552 | -10.07% | |
| Mackenzie Financial Corp | 0.02% | 614,123 | $16,710,287 | $15,027,590 | -$1,682,697 | -10.07% | |
| Squarepoint Ops Llc | 0.03% | 603,410 | $16,418,786 | $14,765,443 | -$1,653,343 | -10.07% | |
| Vident Advisory, Llc | 0.11% | 548,932 | $14,936,429 | $13,432,366 | -$1,504,063 | -10.07% | |
| O'Shaughnessy Asset Management, Llc | 0.07% | 516,370 | $14,050,428 | $12,635,574 | -$1,414,854 | -10.07% | |
| Millennium Management Llc | 0.01% | 505,576 | $13,756,723 | $12,371,445 | -$1,385,278 | -10.07% | |
| Moran Wealth Management, Llc | 0.37% | 500,125 | $13,608,401 | $12,238,059 | -$1,370,342 | -10.07% | |
| Rhumbline Advisers | 0.01% | 493,285 | $13,422,274 | $12,070,684 | -$1,351,590 | -10.07% | |
| Laird Norton Wetherby Trust Company, Llc | 0.25% | 476,903 | $12,976,531 | $11,669,816 | -$1,306,715 | -10.07% | |
| Quadrant Capital Group Llc | 0.33% | 444,777 | $12,102,382 | $10,883,693 | -$1,218,689 | -10.07% | |
| Vanguard Personalized Indexing Management, Llc | 0.10% | 434,448 | $11,821,330 | $10,630,943 | -$1,190,387 | -10.07% | |
| Lsv Asset Management | 0.02% | 434,160 | $11,813,000 | $10,623,895 | -$1,189,105 | -10.07% | |
| Guggenheim Capital Llc | 0.07% | 422,818 | $11,504,877 | $10,346,356 | -$1,158,521 | -10.07% | |
| Vanguard Fiduciary Trust Co | 0.00% | 420,098 | $11,430,867 | $10,279,798 | -$1,151,069 | -10.07% | |
| Ethic Inc. | 0.13% | 374,860 | $10,199,929 | $9,172,824 | -$1,027,105 | -10.07% | |
| First Trust Advisors Lp | 0.01% | 345,845 | $9,410,442 | $8,462,827 | -$947,615 | -10.07% | |
| Nuveen, Llc | 0.00% | 257,707 | $7,012,208 | $6,306,090 | -$706,118 | -10.07% | |
| Lmr Partners Llp | 0.05% | 255,600 | $6,954,876 | $6,254,532 | -$700,344 | -10.07% | |
| Wellington Management Group Llp | 0.00% | 231,006 | $6,285,673 | $5,652,717 | -$632,956 | -10.07% | |
| Signaturefd, Llc | 0.08% | 229,089 | $6,233,512 | $5,605,808 | -$627,704 | -10.07% |
Frequently asked questions about UMC
Who owns the most UMC stock?
The largest holders of UMC are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for UNITED MICROELECTRON-SP ADR (UMC).
Is UMC widely held by superinvestors?
Many widely followed stocks like UMC appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly UMC is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.