UMC
United Microelectronic Corp.
stockNYSEADR
Market OpenOct 28, 2026 10:29:02 AM EDT
18.78USD-3.419%(-0.67)2,650,960
Pre-marketOct 28, 2026 9:29:30 AM EDT
19.01USD-2.262%(-0.44)
As of 2026-10-15, there were 30,184,605 shares short with a short interest of 1.39%.
UMC Short Interest - Official
UMC Short Position Change - Official
UMC Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-10-15 | 1.39 | 30,184,605 | 2.50 | +2,390,484 | +8.60 | 2,507,908,580 | 2,165,683,938 |
| 2026-09-30 | 1.28 | 27,794,121 | 2.39 | -10,606,140 | -27.62 | 2,507,908,580 | 2,165,206,012 |
| 2026-09-15 | 1.77 | 38,400,261 | 3.56 | +4,732,090 | +14.06 | 2,507,908,580 | 2,165,206,012 |
| 2026-08-31 | 1.55 | 33,668,171 | 2.96 | +3,973,085 | +13.38 | 2,507,908,580 | 2,165,206,012 |
| 2026-08-14 | 1.37 | 29,695,086 | 2.58 | -4,498,548 | -13.16 | 2,507,908,580 | 2,165,206,012 |
| 2026-07-31 | 1.59 | 34,193,634 | 1.90 | +13,682,047 | +66.70 | 2,507,908,580 | 2,146,107,970 |
| 2026-07-15 | 0.93 | 20,511,587 | 1.24 | -5,665,572 | -21.64 | 2,509,286,774 | 2,204,394,276 |
| 2026-06-30 | 1.19 | 26,177,159 | 1.31 | +846,149 | +3.34 | 2,509,286,774 | 2,204,394,276 |
| 2026-06-15 | 1.09 | 25,331,010 | 1.35 | -1,585,928 | -5.89 | 2,509,286,774 | 2,325,379,098 |
| 2026-05-15 | 1.16 | 26,916,938 | 1.64 | +252,863 | +0.95 | 2,512,046,774 | 2,323,517,406 |
| 2026-04-30 | 1.14 | 26,664,075 | 1.77 | +834,319 | +3.23 | 2,515,396,974 | 2,336,999,172 |
| 2026-04-15 | 1.11 | 25,829,756 | 3.07 | -4,436,844 | -14.66 | 2,515,704,924 | 2,336,999,172 |
| 2026-03-31 | 1.30 | 30,266,600 | 3.70 | -3,921,881 | -11.47 | 2,515,704,924 | 2,336,999,172 |
| 2026-03-13 | 1.46 | 34,188,481 | 3.98 | +3,751,011 | +12.32 | 2,517,631,269 | 2,336,999,172 |
| 2026-02-27 | 1.30 | 30,437,470 | 4.66 | -1,174,359 | -3.71 | 2,517,631,269 | 2,336,999,172 |
| 2026-02-13 | 1.35 | 31,611,829 | 2.99 | -245,379 | -0.77 | 2,517,631,269 | 2,336,999,172 |
| 2026-01-30 | 1.36 | 31,857,208 | 1.73 | -16,150,161 | -33.64 | 2,517,631,269 | 2,336,999,172 |
| 2026-01-15 | 2.05 | 48,007,369 | 4.07 | +5,915,456 | +14.05 | 2,517,631,269 | 2,336,999,172 |
| 2025-12-31 | 1.80 | 42,091,913 | 6.51 | -3,819,400 | -8.32 | 2,517,631,269 | 2,336,999,172 |
| 2025-12-15 | 1.96 | 45,911,313 | 4.91 | -1,943,170 | -4.06 | 2,517,631,269 | 2,336,999,172 |
| 2025-11-28 | 2.05 | 47,854,483 | 5.78 | -2,714,012 | -5.37 | 2,511,055,669 | 2,336,974,050 |
| 2025-11-14 | 2.16 | 50,568,495 | 6.06 | -1,454,314 | -2.80 | 2,511,055,669 | 2,337,451,368 |
| 2025-10-31 | 2.23 | 52,022,809 | 6.88 | +3,978,365 | +8.28 | 2,511,055,669 | 2,336,597,220 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.