UMC · United Microelectronics Corp · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 371 13F filersWho Holds UMC
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 365 filers, like-for-like change +3.2%; actively managed books -5.7%; index-like books +17.7%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 29.8% | 214 | -18.5% |
| Exempt adviser | 0.3% | 5 | -89.8% |
| Adviser | 0.2% | 7 | +40.5% |
| Bank | 25.5% | 19 | +54.9% |
| Insurer | 0.0% | 1 | -63.1% |
| Broker-dealer | 0.1% | 1 | -48.6% |
| Benefit plan | 0.0% | 1 | new |
| Non-US | 1.2% | 6 | -20.5% |
| Holding company | 30.9% | 9 | +30.3% |
| Unknown | 12.1% | 102 | -22.2% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 43.4% | 21 | +17.7% |
| Systematic-like | 3.5% | 18 | -70.8% |
| Concentrated | 1.7% | 82 | -0.7% |
| Diversified active | 51.4% | 244 | +11.2% |
| Unknown | 0.0% | 0 | — |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 58.6% | 220 | +33.8% |
| Medium turnover | 30.3% | 68 | -2.1% |
| High turnover | 4.1% | 35 | -71.6% |
| Unknown | 7.0% | 42 | -8.4% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 7.2% | 49 | -13.8% |
| Medium horizon | 23.7% | 61 | +15.5% |
| Long horizon | 66.4% | 233 | +13.1% |
| Unknown | 2.7% | 22 | -71.3% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 1.7% | 99 | +38.0% |
| $1B to $10B | 4.4% | 130 | -12.0% |
| $10B to $100B | 20.3% | 85 | -5.5% |
| $100B or more | 73.7% | 51 | +6.3% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 5.0% | 154 | -3.2% |
| Pooled investment vehicles | 3.1% | 19 | -62.0% |
| Registered funds and BDCs | 15.6% | 19 | +17.3% |
| Pension and profit sharing plans | 0.0% | 2 | +379.4% |
| Insurance companies | 0.0% | 1 | 0.0% |
| Charitable organizations | 0.0% | 1 | -31.0% |
| Governments and sovereign funds | 0.3% | 3 | -22.6% |
| Corporations | 0.0% | 1 | -20.6% |
| Other investment advisers | 0.5% | 5 | -9.5% |
| Other | 0.0% | 1 | new |
| Diversified | 5.3% | 8 | -40.8% |
| Unknown | 70.2% | 151 | +16.3% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 8.7% | 28 | -56.9% |
| Private equity funds | 1.8% | 13 | +4.1% |
| Venture capital funds | 0.0% | 1 | -49.2% |
| Real estate funds | 0.0% | 4 | -16.7% |
| Liquidity funds | 0.0% | 1 | +13.4% |
| Securitized asset funds | 0.0% | 1 | +7.3% |
| Other private funds | 4.0% | 21 | +9.8% |
| Mixed private funds | 0.0% | 0 | -100.0% |
| Private funds, type not stated | 0.2% | 6 | +130.7% |
| No private funds | 15.2% | 144 | +11.6% |
| Unknown | 69.9% | 146 | +21.8% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 82.7% | 312 | +3.7% |
| Outside the US | 17.3% | 52 | +1.0% |
| Unknown | 0.0% | 1 | — |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 8 holders with no observed 2026-03-31 13F and 8 holders with no observed 2026-06-30 13F.
Conviction and Crowding
365 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net sellers of $6,057,068 (0 buying, 1 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 36.4% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies UMC's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | ASX ASE Technology Holding Co., Ltd. | 32 |
| 2 | KB KB Financial Group Inc. | 17 |
| 3 | WF Woori Financial Group Inc. | 8 |
| 4 | SHG Shinhan Financial Group Co Ltd | 9 |
| 5 | IBN Icici Bank Ltd | 16 |
| 6 | CHT Chunghwa Telecom Co Ltd | 5 |
| 7 | RDY Dr Reddys Laboratories Ltd | 4 |
| 8 | LPL LG Display Co., Ltd. | 3 |
| 9 | PKX Posco Holdings Inc. | 3 |
| 10 | WIT Wipro Ltd | 5 |
Shareholder Targets
13F filers that own its peers but not UMC, quarter ended Jun 30, 2026Found through its holder-overlap peers: ASX, KB, WF, SHG, IBN, CHT, RDY, LPL, PKX, WIT, ASML, HSBC, WDC, TSM, SAN, SNDK, BHP, MU, KLAC, LRCX. 5,188 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Capital World Investors Adviser, Diversified active | $82,430,803,897 11 held | MU, TSM, KLAC |
| 2 | GEODE CAPITAL MANAGEMENT, LLC Registered adviser, Index-like | $71,935,727,542 15 held | MU, LRCX, KLAC |
| 3 | PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser, Diversified active | $46,959,908,987 13 held | MU, LRCX, TSM |
| 4 | NORGES BANK Non-US, Index-like | $38,993,414,677 9 held | MU, LRCX, KLAC |
| 5 | Capital International Investors Adviser, Diversified active | $34,769,644,060 8 held | MU, KLAC, TSM |
| 6 | PRIMECAP MANAGEMENT CO/CA/ Registered adviser, Diversified active | $29,408,609,520 5 held | MU, KLAC, ASML |
| 7 | VAN ECK ASSOCIATES CORP Registered adviser, Index-like | $28,309,981,706 10 held | TSM, MU, ASML |
| 8 | Fisher Asset Management, LLC Adviser, Diversified active | $23,218,673,919 14 held | ASML, TSM, BHP |
| 9 | Bank of New York Mellon Corp Bank, Index-like | $22,445,907,365 16 held | MU, LRCX, TSM |
| 10 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser, Diversified active | $20,181,792,211 10 held | MU, SNDK, LRCX |
Fund Ownership of UMC by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 1.17% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 0.02% | 380,358 |
| Index ETFs | 1.16% | 29,062,657 |
| Active ETFs | 0.12% | 2,928,219 |
| Active funds | 0.11% | 2,670,504 |
| Unclassified | 0.07% | 1,843,806 |
| All registered funds | 1.47% | 36,885,544 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $858,324,586 | 16.27% | 31,544,454 | Shares | 2026-08-07 | |
| Mega UBS Group AG Bank | $316,533,031 | 6.00% | 11,632,967 | Shares | 2026-08-13 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $302,297,248 | 5.73% | 11,109,785 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $277,030,669 | 5.25% | 10,181,208 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $234,059,522 | 4.44% | 8,601,967 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY Holding company | $225,450,437 | 4.27% | 8,285,573 | Shares | 2026-08-13 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $210,010,180 | 3.98% | 7,718,125 | Shares | 2026-08-14 | |
| Large Rafferty Asset Management, LLC Registered adviser | $208,248,415 | 3.95% | 7,653,378 | Shares | 2026-08-14 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $156,545,796 | 2.97% | 5,753,245 | Shares | 2026-08-13 | |
| Large Man Group plc | $152,197,148 | 2.89% | 5,593,427 | Shares | 2026-08-14 | |
| Mega CITIGROUP INC Bank | $147,324,789 | 2.79% | 5,414,362 | Shares | 2026-08-03 | |
| Mega BARCLAYS PLC Bank | $133,119,101 | 2.52% | 4,892,286 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $132,733,754 | 2.52% | 4,878,124 | Shares | 2026-09-22 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $122,806,893 | 2.33% | 4,513,300 | Call | 2026-08-14 | |
| Mega NEUBERGER BERMAN GROUP LLC Holding company | $112,507,581 | 2.13% | 4,134,788 | Shares | 2026-08-13 | |
| Mega NORTHERN TRUST CORP Bank | $108,482,786 | 2.06% | 3,986,872 | Shares | 2026-08-13 | |
| Mega JPMORGAN CHASE & CO Bank | $99,613,059 | 1.89% | 3,660,899 | Shares | 2026-08-12 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $87,584,200 | 1.66% | 3,218,824 | Shares | 2026-08-11 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $84,047,662 | 1.59% | 3,088,852 | Shares | 2026-08-14 | |
| Mega Creative Planning Registered adviser | $66,684,008 | 1.26% | 2,450,717 | Shares | 2026-08-13 | |
| Large Tidal Investments LLC Registered adviser | $64,086,815 | 1.22% | 2,355,267 | Shares | 2026-08-13 | |
| Large Tidal Investments LLC Registered adviser | $58,950,465 | 1.12% | 2,166,500 | Call | 2026-08-13 | |
| Large Empowered Funds, LLC Registered adviser | $51,456,177 | 0.98% | 1,891,076 | Shares | 2026-08-17 | |
| Small MATTHEWS INTERNATIONAL CAPITAL MANAGEMENT LLC Registered adviser | $39,881,533 | 0.76% | 1,465,694 | Shares | 2026-07-31 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $36,542,920 | 0.69% | 1,342,996 | Shares | 2026-08-13 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $33,507,781 | 0.64% | 1,231,451 | Shares | 2026-08-13 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $30,664,119 | 0.58% | 1,126,943 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $27,563,730 | 0.52% | 1,013,000 | Put | 2026-08-14 | |
| Mid E Fund Management Co., Ltd. | $27,095,445 | 0.51% | 995,790 | Shares | 2026-08-11 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $26,603,217 | 0.50% | 977,700 | Put | 2026-08-14 | |
| Large PEAK6 LLC Broker-dealer | $25,773,312 | 0.49% | 947,200 | Call | 2026-08-13 | |
| Large CAPITAL FUND MANAGEMENT S.A. | $24,415,886 | 0.46% | 897,313 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $23,395,158 | 0.44% | 859,800 | Call | 2026-08-14 | |
| Large NOMURA HOLDINGS INC | $22,146,246 | 0.42% | 813,901 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $21,555,762 | 0.41% | 792,200 | Call | 2026-09-02 | |
| Large Quantinno Capital Management LP Registered adviser | $21,526,620 | 0.41% | 791,129 | Shares | 2026-08-13 | |
| Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. Non-US | $20,914,068 | 0.40% | 768,617 | Shares | 2026-08-13 | |
| Mega SG Americas Securities, LLC | $18,693,868 | 0.35% | 687,022 | Shares | 2026-08-07 | |
| Large US BANCORP \DE\ Bank | $18,595,666 | 0.35% | 683,413 | Shares | 2026-08-12 | |
| Large MACKENZIE FINANCIAL CORP Registered adviser | $16,710,286 | 0.32% | 614,123 | Shares | 2026-08-13 | |
| Large Squarepoint Ops LLC Registered adviser | $16,418,786 | 0.31% | 603,410 | Shares | 2026-08-14 | |
| Large Vident Advisory, LLC Registered adviser | $14,936,439 | 0.28% | 548,932 | Shares | 2026-08-12 | |
| Large Walleye Trading LLC | $14,391,369 | 0.27% | 528,900 | Put | 2026-08-03 | |
| Large O'SHAUGHNESSY ASSET MANAGEMENT, LLC Registered adviser | $14,050,427 | 0.27% | 516,370 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $13,756,722 | 0.26% | 505,576 | Shares | 2026-08-14 | |
| Mid Moran Wealth Management, LLC Registered adviser | $13,608,400 | 0.26% | 500,125 | Shares | 2026-08-05 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $13,561,464 | 0.26% | 498,400 | Put | 2026-09-02 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $13,422,284 | 0.25% | 493,285 | Shares | 2026-08-12 | |
| Mid Laird Norton Wetherby Trust Company, LLC | $12,976,529 | 0.25% | 476,903 | Shares | 2026-08-14 | |
| Mid QUADRANT CAPITAL GROUP LLC | $12,102,382 | 0.23% | 444,777 | Shares | 2026-08-14 | |
| Large Vanguard Personalized Indexing Management, LLC Registered adviser | $11,821,330 | 0.22% | 434,448 | Shares | 2026-08-11 | |
| Large LSV ASSET MANAGEMENT Registered adviser | $11,813,493 | 0.22% | 434,160 | Shares | 2026-08-06 | |
| Large GUGGENHEIM CAPITAL LLC | $11,504,877 | 0.22% | 422,818 | Shares | 2026-08-12 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $11,430,866 | 0.22% | 420,098 | Shares | 2026-08-13 | |
| Mid Advisors Asset Management, Inc. Registered adviser | $10,510,842 | 0.20% | 386,286 | Shares | 2026-08-14 | |
| Mid Ethic Inc. Registered adviser | $10,199,940 | 0.19% | 374,860 | Shares | 2026-07-29 | |
| Large Nykredit A/S | $9,524,860 | 0.18% | 350,050 | Shares | 2026-09-08 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $9,410,442 | 0.18% | 345,845 | Shares | 2026-08-11 | |
| Large PEAK6 LLC Broker-dealer | $7,025,622 | 0.13% | 258,200 | Put | 2026-08-13 | |
| Mega Nuveen, LLC | $7,012,207 | 0.13% | 257,707 | Shares | 2026-08-11 | |
| Large LMR Partners LLP Exempt adviser | $6,954,876 | 0.13% | 255,600 | Shares | 2026-08-14 | |
| Large Walleye Capital LLC Registered adviser | $6,726,312 | 0.13% | 247,200 | Put | 2026-08-03 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $6,285,672 | 0.12% | 231,006 | Shares | 2026-08-14 | |
| Mid SIGNATUREFD, LLC Registered adviser | $6,233,511 | 0.12% | 229,089 | Shares | 2026-07-24 | |
| Mega SCHRODER INVESTMENT MANAGEMENT GROUP Registered adviser | $6,202,436 | 0.12% | 227,947 | Shares | 2026-08-13 | |
| Mega Russell Investments Group, Ltd. | $6,068,535 | 0.12% | 223,026 | Shares | 2026-08-06 | |
| Large B. Metzler seel. Sohn & Co. AG | $6,067,149 | 0.12% | 222,975 | Shares | 2026-08-11 | |
| Large Walleye Trading LLC | $6,057,517 | 0.11% | 222,621 | Shares | 2026-08-03 | |
| Large Cerity Partners LLC Registered adviser | $5,948,567 | 0.11% | 218,617 | Shares | 2026-08-14 | |
| Large NATIXIS ADVISORS, LLC Registered adviser | $5,924,052 | 0.11% | 217,716 | Shares | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Non-US | $5,760,112 | 0.11% | 211,691 | Shares | 2026-08-07 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $5,718,399 | 0.11% | 210,158 | Shares | 2026-09-02 | |
| Large Walleye Trading LLC | $5,708,658 | 0.11% | 209,800 | Call | 2026-08-03 | |
| Mid NLB Skladi, upravljanje premozenja, d.o.o. | $5,605,260 | 0.11% | 206,000 | Shares | 2026-08-06 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $5,470,325 | 0.10% | 201,041 | Shares | 2026-08-14 | |
| Large IEQ CAPITAL, LLC Registered adviser | $5,359,009 | 0.10% | 196,950 | Shares | 2026-08-11 | |
| Mega D. E. Shaw & Co., Inc. | $5,341,703 | 0.10% | 196,314 | Shares | 2026-08-14 | |
| Mid Ballentine Partners, LLC Registered adviser | $5,243,066 | 0.10% | 192,689 | Shares | 2026-07-17 | |
| Mid Crossmark Global Holdings, Inc. | $5,218,714 | 0.10% | 191,794 | Shares | 2026-07-16 | |
| Large Sequoia Financial Advisors, LLC Registered adviser | $5,093,929 | 0.10% | 187,208 | Shares | 2026-07-17 | |
| Large Robeco Institutional Asset Management B.V. | $5,039,536 | 0.10% | 185,209 | Shares | 2026-07-21 | |
| Mega UBS Group AG Bank | $4,911,405 | 0.09% | 180,500 | Call | 2026-08-13 | |
| Large Baird Financial Group, Inc. | $4,777,068 | 0.09% | 175,563 | Shares | 2026-08-12 | |
| Mid Vise Technologies, Inc. | $4,758,484 | 0.09% | 174,880 | Shares | 2026-08-11 | |
| Large ABN AMRO INVESTMENT SOLUTIONS | $4,680,120 | 0.09% | 172,000 | Shares | 2026-07-23 | |
| Large Mariner, LLC Registered adviser | $4,632,856 | 0.09% | 170,263 | Shares | 2026-08-13 | |
| Mid XTX Topco Ltd | $4,549,512 | 0.09% | 167,200 | Shares | 2026-08-14 | |
| Large NOMURA HOLDINGS INC | $4,538,628 | 0.09% | 166,800 | Call | 2026-08-14 | |
| Large STOREBRAND ASSET MANAGEMENT AS | $3,996,468 | 0.08% | 146,875 | Shares | 2026-08-12 | |
| Mid GREENLEAF TRUST Bank | $3,922,267 | 0.07% | 144,148 | Shares | 2026-07-21 | |
| Large Pathstone Holdings, LLC | $3,883,383 | 0.07% | 142,719 | Shares | 2026-08-13 | |
| Large LAZARD ASSET MANAGEMENT LLC Adviser | $3,812,447 | 0.07% | 140,112 | Shares | 2026-08-14 | |
| Large MARSHALL WACE, LLP Exempt adviser | $3,796,067 | 0.07% | 139,510 | Shares | 2026-08-13 | |
| Large Corient Private Wealth LLC Registered adviser | $3,753,510 | 0.07% | 137,946 | Shares | 2026-08-27 | |
| Mega FMR LLC Holding company | $3,717,238 | 0.07% | 136,613 | Shares | 2026-08-13 | |
| Small Delta Global Management LP Registered adviser | $3,644,099 | 0.07% | 133,925 | Shares | 2026-08-13 | |
| Mid Callan Family Office, LLC Registered adviser | $3,643,609 | 0.07% | 133,907 | Shares | 2026-08-11 | |
| Mid PROFUND ADVISORS LLC Registered adviser | $3,640,534 | 0.07% | 133,794 | Shares | 2026-08-11 | |
| Large Walleye Capital LLC Registered adviser | $3,564,510 | 0.07% | 131,000 | Call | 2026-08-03 | |
| Mid Parallel Advisors, LLC Registered adviser | $3,525,463 | 0.07% | 129,565 | Shares | 2026-08-05 |
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