The highest closing price for United Microelectronics (UMC) last month was $25.77, on September 22. It was up 19.9% for the month. The latest price is $22.38.
| DATE | OPEN | HIGH | LOW | CLOSE | VOLUME |
|---|---|---|---|---|---|
September 30 2026 | $24.45 | $24.69 | $24.35 | $24.49 | 7,092,400 |
September 29 2026 | $24.43 | $25.02 | $24.11 | $24.72 | 10,906,400 |
September 28 2026 | $24.08 | $24.21 | $23.42 | $23.85 | 7,090,800 |
September 25 2026 | $24.25 | $24.54 | $24.12 | $24.31 | 6,334,400 |
September 24 2026 | $24.11 | $24.35 | $23.80 | $24.10 | 6,672,600 |
September 23 2026 | $25.28 | $25.38 | $24.41 | $24.68 | 10,892,400 |
September 22 2026 | $25.26 | $25.80 | $25.13 | $25.77 | 8,421,800 |
September 21 2026 | $24.93 | $25.63 | $24.64 | $25.43 | 11,256,800 |
September 18 2026 | $24.45 | $24.71 | $23.88 | $24.61 | 30,092,000 |
September 17 2026 | $23.51 | $24.55 | $23.30 | $24.47 | 17,755,200 |
September 16 2026 | $22.49 | $22.84 | $22.25 | $22.53 | 11,217,700 |
September 15 2026 | $21.89 | $22.06 | $21.59 | $21.61 | 8,815,700 |
September 14 2026 | $22.08 | $22.26 | $21.81 | $21.90 | 16,298,200 |
September 11 2026 | $22.41 | $22.72 | $22.32 | $22.64 | 7,185,200 |
September 10 2026 | $21.94 | $22.28 | $21.84 | $22.12 | 10,127,200 |
September 09 2026 | $22.02 | $22.70 | $21.93 | $22.69 | 11,197,600 |
September 08 2026 | $21.58 | $22.20 | $21.58 | $21.82 | 11,535,100 |
September 04 2026 | $20.48 | $21.03 | $20.33 | $20.77 | 10,010,900 |
September 03 2026 | $19.57 | $19.95 | $19.45 | $19.86 | 6,066,200 |
September 02 2026 | $19.54 | $20.14 | $19.49 | $19.97 | 8,754,600 |
September 01 2026 | $20.43 | $20.84 | $20.19 | $20.47 | 17,944,200 |
Daily pricing data for United Microelectronics dates back to 9/19/2000, and may be incomplete.