United Microelectronics Corporation (UMC) Ownership
UMC ownership summary
as of October 18, 2026- Institutions
- 7.5% of shares outstanding
- Insiders
- 0.00% of shares outstanding
- Shares outstanding
- 2.51B
- Float
- 2.17B shares available to trade
- Short interest
- 1.19% 27.8M shares short
- Days to cover
- 2.50 short interest down 17.4% vs prior month
- Institutions 7.46%
- Other investors 92.54%
UMC top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 1.26% | 31.5M | $625.2M | +4.0M (+14.7%) | June 30, 2026 |
| 2 | UBS Group AG | 0.46% | 11.6M | $230.6M | +3.5M (+42.3%) | June 30, 2026 |
| 3 | The Goldman Sachs Group Inc | 0.44% | 11.1M | $220.2M | +5.2M (+89.1%) | June 30, 2026 |
| 4 | Bank of America Corp | 0.41% | 10.2M | $201.8M | +7.6M (+291.1%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 0.34% | 8.6M | $170.5M | −386,476 (−4.3%) | June 30, 2026 |
| 6 | Morgan Stanley - Brokerage Accounts | 0.33% | 8.3M | $164.2M | −492,330 (−5.6%) | June 30, 2026 |
| 7 | AQR Capital Management LLC | 0.31% | 7.7M | $153.0M | −7.0M (−47.5%) | June 30, 2026 |
| 8 | Rafferty Asset Management, LLC | 0.31% | 7.7M | $151.7M | +2.7M (+53.6%) | June 30, 2026 |
| 9 | Acadian Asset Management LLC | 0.23% | 5.8M | $114.0M | −2.4M (−29.2%) | June 30, 2026 |
| 10 | Man Group PLC | 0.22% | 5.6M | $110.9M | −135,474 (−2.4%) | June 30, 2026 |
| 11 | Citigroup Inc | 0.22% | 5.4M | $107.3M | +1.1M (+26.0%) | June 30, 2026 |
| 12 | Barclays PLC | 0.20% | 4.9M | $97.0M | +153,419 (+3.2%) | June 30, 2026 |
| 13 | State Street Corp | 0.19% | 4.9M | $96.7M | −135,085 (−2.7%) | June 30, 2026 |
| 14 | Neuberger Berman Group LLC | 0.16% | 4.1M | $82.0M | +4.0M (+3,524.9%) | June 30, 2026 |
| 15 | Northern Trust Corp | 0.16% | 4.0M | $79.0M | +787,998 (+24.6%) | June 30, 2026 |
| 16 | JPMorgan Chase & Co | 0.15% | 3.7M | $72.6M | +3.4M (+1,304.2%) | June 30, 2026 |
| 17 | Dimensional Fund Advisors, Inc. | 0.13% | 3.2M | $63.8M | +369,087 (+13.0%) | June 30, 2026 |
| 18 | Two Sigma Investments LLC | 0.12% | 3.1M | $61.2M | −6.6M (−68.0%) | June 30, 2026 |
| 19 | Creative Planning Inc | 0.10% | 2.5M | $48.6M | +86,346 (+3.7%) | June 30, 2026 |
| 20 | Tidal Investments LLC. | 0.09% | 2.4M | $46.7M | +759,116 (+47.6%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 33.7M shares and 7 cut 17.1M.
UMC top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Semiconductor ETF | 0.53% | 13.3M | $262.6M | −133,450 (−1.0%) | September 30, 2026 |
| 2 | Vanguard Emerging Mkts Stock Idx Inv | 0.23% | 5.7M | $112.1M | — | August 31, 2026 |
| 3 | Direxion Daily Semicondct Bull 3X ETF | 0.18% | 4.6M | $91.5M | −27,874 (−0.6%) | September 30, 2026 |
| 4 | State Street® SPDR® Portfolio EM ETF | 0.15% | 3.8M | $75.1M | — | September 30, 2026 |
| 5 | YieldMax Semiconductor Port Opt Inc ETF | 0.10% | 2.5M | $48.7M | +9,903 (+0.4%) | September 30, 2026 |
| 6 | Vanguard FTSE All-Wld ex-US ETF | 0.08% | 2.1M | $41.3M | — | August 31, 2026 |
| 7 | Freedom 100 Emerging Markets ETF | 0.08% | 2.0M | $38.9M | — | September 30, 2026 |
| 8 | ChinaAMC Glb Tech XF Alloc QDII RMB | 0.07% | 1.7M | $32.9M | +1.7M (0.0%) | June 30, 2026 |
| 9 | Vanguard Global Minimum Volatility Admr | 0.05% | 1.2M | $24.4M | −1.5M (−55.4%) | June 30, 2026 |
| 10 | Debeka-Aktien-Asien-ESG C | 0.04% | 1.1M | $21.0M | — | July 31, 2026 |
| 11 | Dimensional Emerging Core Equity Mkt ETF | 0.04% | 1.0M | $20.1M | — | September 30, 2026 |
| 12 | E Fund Gbl Grh Slt Alc (QDII) A USD Cash | 0.04% | 981K | $19.4M | +980,943 (0.0%) | June 30, 2026 |
| 13 | Dimensional Emerging Markets Cr Eq 2 ETF | 0.04% | 908K | $18.0M | — | September 30, 2026 |
| 14 | Vanguard Total Intl Stock Index Inv | 0.03% | 831K | $16.5M | — | August 31, 2026 |
| 15 | iShares Flexible Equity Active ETF | 0.03% | 769K | $15.2M | +1,472 (+0.2%) | September 30, 2026 |
| 16 | Harbor International Core Investor | 0.03% | 697K | $13.8M | +14,607 (+2.1%) | September 30, 2026 |
| 17 | Dimensional Emerging Markets Value ETF | 0.02% | 623K | $12.4M | — | September 30, 2026 |
| 18 | Matthews Asia Innovators Investor | 0.02% | 487K | $9.7M | +33,104 (+7.3%) | June 30, 2026 |
| 19 | CC&L Q Emerging Markets Equity A USD Acc | 0.01% | 288K | $5.7M | −115,084 (−28.6%) | June 30, 2026 |
| 20 | 1895 Aandelen Macro Opportunities FondsD | 0.01% | 286K | $5.7M | −22,400 (−7.3%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
UMC shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns UMC
Institutional investors own 7.5% of United Microelectronics's shares and insiders 0.00%. The largest holder is BlackRock Inc with 1.26% of the shares (31.5M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 7 reduced their stake in the latest filings. Short interest is 1.19% of the float, or 2.50 days of average trading volume.
Related: UMC analyst forecast, UMC dividend history. See the UMC stock overview for the latest quote and news.
UMC ownership FAQ
Who owns the most United Microelectronics stock?
The largest shareholders of United Microelectronics are BlackRock Inc (1.26%), UBS Group AG (0.46%), The Goldman Sachs Group Inc (0.44%), Bank of America Corp (0.41%), Vanguard Capital Management, LLC (0.34%).
What percentage of United Microelectronics is owned by institutions?
Institutions hold 7.5% of United Microelectronics's shares outstanding; insiders hold 0.00%.
Which funds own United Microelectronics?
The largest fund holders of United Microelectronics are iShares Semiconductor ETF (0.53%), Vanguard Emerging Mkts Stock Idx Inv (0.23%), Direxion Daily Semicondct Bull 3X ETF (0.18%), State Street® SPDR® Portfolio EM ETF (0.15%), YieldMax Semiconductor Port Opt Inc ETF (0.10%).
What is United Microelectronics's short interest?
27.8M shares of United Microelectronics were sold short, 1.19% of the float; at the average daily volume it would take 2.50 days to cover.
How many shares of United Microelectronics are outstanding?
United Microelectronics has 2.51B shares outstanding, of which 2.17B are in the public float.