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 $1.61B 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 $246.91M in its March 31, 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 $523.25M, representing an estimated gain of +111.92% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 56% of the total disclosed UMC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Aqr Capital Management Llc, Two Sigma Investments, Lp, 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
332
Total Reported Value
$1.61B
Largest Holder
Blackrock, Inc.
Largest Position
$246.91M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
90
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 27,495,880 | $246,913,000 | $523,246,596 | +$276,333,596 | +111.92% | |
| Aqr Capital Management Llc | 0.06% | 14,714,030 | $132,131,988 | $280,007,991 | +$147,876,003 | +111.92% | |
| Two Sigma Investments, Lp | 0.07% | 9,655,402 | $86,705,510 | $183,742,300 | +$97,036,790 | +111.92% | |
| Vanguard Capital Management Llc | 0.00% | 8,988,443 | $80,716,218 | $171,050,070 | +$90,333,852 | +111.92% | |
| Morgan Stanley | 0.00% | 8,777,903 | $78,825,587 | $167,043,494 | +$88,217,907 | +111.92% | |
| Ubs Group Ag | 0.01% | 8,175,144 | $73,412,794 | $155,572,990 | +$82,160,196 | +111.92% | |
| Goldman Sachs Group Inc | 0.01% | 5,874,864 | $52,756,275 | $111,798,662 | +$59,042,387 | +111.92% | |
| Man Group Plc | 0.11% | 5,728,901 | $51,445,531 | $109,020,986 | +$57,575,455 | +111.92% | |
| Storebrand Asset Management As | 0.02% | 6,943,717 | $50,411,286 | $132,138,935 | +$81,727,649 | +162.12% | |
| Qube Research & Technologies Ltd | 0.07% | 5,101,879 | $45,814,873 | $97,088,757 | +$51,273,884 | +111.92% | |
| State Street Corp | 0.00% | 5,013,209 | $45,018,617 | $95,401,367 | +$50,382,750 | +111.92% | |
| Rafferty Asset Management, Llc | 0.18% | 4,983,653 | $44,753,204 | $94,838,917 | +$50,085,713 | +111.92% | |
| Barclays Plc | 0.02% | 4,738,867 | $42,555,026 | $90,180,639 | +$47,625,613 | +111.92% | |
| Matthews International Capital Management Llc | 13.67% | 1,465,694 | $39,881,534 | $27,892,157 | -$11,989,377 | -30.06% | |
| Citigroup Inc | 0.02% | 4,296,722 | $38,584,563 | $81,766,620 | +$43,182,057 | +111.92% | |
| Northern Trust Corp | 0.00% | 3,198,874 | $28,725,888 | $60,874,572 | +$32,148,684 | +111.92% | |
| Dimensional Fund Advisors Lp | 0.01% | 2,849,737 | $25,590,636 | $54,230,495 | +$28,639,859 | +111.92% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,763,082 | $24,812,476 | $52,581,450 | +$27,768,974 | +111.92% | |
| Bank Of America Corp | 0.00% | 2,603,218 | $23,376,900 | $49,539,239 | +$26,162,339 | +111.92% | |
| Jane Street Group, Llc | 0.02% | 2,570,219 | $23,080,566 | $48,911,268 | +$25,830,702 | +111.92% | |
| Creative Planning | 0.01% | 2,364,371 | $21,232,050 | $44,993,980 | +$23,761,930 | +111.92% | |
| D. E. Shaw & Co., Inc. | 0.01% | 1,891,608 | $16,986,640 | $35,997,300 | +$19,010,660 | +111.92% | |
| Millennium Management Llc | 0.01% | 1,770,129 | $15,895,758 | $33,685,555 | +$17,789,797 | +111.92% | |
| Tidal Investments Llc | 0.04% | 1,596,151 | $14,333,436 | $30,374,754 | +$16,041,318 | +111.92% | |
| Bnp Paribas Financial Markets | 0.01% | 1,581,879 | $14,205,273 | $30,103,157 | +$15,897,884 | +111.92% | |
| Ethic Inc. | 0.13% | 374,860 | $10,199,929 | $7,133,586 | -$3,066,343 | -30.06% | |
| Bnp Paribas Asset Management Holding S.A. | 0.01% | 1,049,370 | $9,423,343 | $19,969,511 | +$10,546,168 | +111.92% | |
| Moran Wealth Management, Llc | 0.25% | 910,416 | $8,175,536 | $17,325,216 | +$9,149,680 | +111.92% | |
| Us Bancorp \De\ | 0.01% | 815,563 | $7,323,756 | $15,520,164 | +$8,196,408 | +111.92% | |
| Citadel Advisors Llc | 0.00% | 765,322 | $6,872,592 | $14,564,078 | +$7,691,486 | +111.92% | |
| Capital Fund Management S.A. | 0.06% | 745,338 | $6,693,135 | $14,183,782 | +$7,490,647 | +111.92% | |
| Quantinno Capital Management Lp | 0.01% | 710,604 | $6,381,226 | $13,522,794 | +$7,141,568 | +111.92% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | 710,083 | $6,376,545 | $13,512,879 | +$7,136,334 | +111.92% | |
| Signaturefd, Llc | 0.08% | 229,089 | $6,233,512 | $4,359,564 | -$1,873,948 | -30.06% | |
| Rhumbline Advisers | 0.01% | 667,577 | $5,994,833 | $12,703,990 | +$6,709,157 | +111.92% | |
| B. Metzler Seel. Sohn & Co. Ag | 0.05% | 653,499 | $5,868,421 | $12,436,086 | +$6,567,665 | +111.92% | |
| Vident Advisory, Llc | 0.05% | 635,255 | $5,704,595 | $12,088,903 | +$6,384,308 | +111.92% | |
| Aquatic Capital Management Llc | 0.16% | 603,979 | $5,423,731 | $11,493,720 | +$6,069,989 | +111.92% | |
| Ballentine Partners, Llc | 0.06% | 192,689 | $5,243,068 | $3,666,872 | -$1,576,196 | -30.06% | |
| Crossmark Global Holdings, Inc. | 0.07% | 191,794 | $5,218,715 | $3,649,840 | -$1,568,875 | -30.06% | |
| Susquehanna International Group, Llp | 0.01% | 575,738 | $5,170,127 | $10,956,294 | +$5,786,167 | +111.92% | |
| Sequoia Financial Advisors | 0.03% | 187,208 | $5,093,934 | $3,562,568 | -$1,531,366 | -30.06% | |
| Robeco Institutional Asset Management B.V. | 0.01% | 185,209 | $5,039,537 | $3,524,527 | -$1,515,010 | -30.06% | |
| Mackenzie Financial Corp | 0.01% | 539,683 | $4,846,353 | $10,270,167 | +$5,423,814 | +111.92% | |
| Abn Amro Investment Solutions | 0.04% | 172,000 | $4,680,120 | $3,273,160 | -$1,406,960 | -30.06% | |
| Laird Norton Wetherby Trust Company, Llc | 0.09% | 461,552 | $4,144,737 | $8,783,335 | +$4,638,598 | +111.92% | |
| Vanguard Fiduciary Trust Co | 0.00% | 440,567 | $3,956,292 | $8,383,990 | +$4,427,698 | +111.92% | |
| Greenleaf Trust | 0.04% | 144,148 | $3,922,267 | $2,743,136 | -$1,179,131 | -30.06% | |
| Guggenheim Capital Llc | 0.03% | 432,045 | $3,879,764 | $8,221,816 | +$4,342,052 | +111.92% | |
| O'Shaughnessy Asset Management, Llc | 0.02% | 426,641 | $3,831,236 | $8,118,978 | +$4,287,742 | +111.92% |
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.