24.78 USD
↗ 4.48 (22.07%)PRE MARKET (AS OF 05:10 AM EDT)
UMC Stock Premarket
United Microelectronic Corp.
UMCNYSE • USD
Market: OPEN
Premarket trading runs 4:00 AM – 9:30 AM ET.
UMC is trading at $24.78 in premarket, up $4.48 (22.07%) from its previous close of $20.30. Historically, 5% of UMC gap-ups of 5% or more have fully filled within one trading day.
📅 UMC is scheduled to report earnings on Jul 29, 2026 before the open (confirmed), with an estimated EPS of $0.15. UMC earnings details →
UMC Premarket Chart
UMC Premarket News
Gap Analytics — 5-year history, 5% minimum gap
Over the past 5 years, UMC has had 42 qualifying gap events (gaps of 5% or more at the open) — 22 gap-ups and 20 gap-downs. Gap-ups averaged +8.3%, 64% have fully filled, median time to fill 4.5 trading days. Gap-downs averaged -6.4%, 75% have fully filled, median time to fill 5 trading days. Most recent: a -7.8% gap down 4 days ago, still unfilled. UMC has 6 unfilled gaps from the past 60 days; the largest is a +15.4% gap up on May 26, 2026, currently 83% retraced. Average 20-trading-day return after a UMC gap up: +17.66%. After a gap down: +17.5%.
Gap Ups22 events
Fill Rate
63.6%
Avg Gap
8.3%
Avg 50% Fill
3d
Avg Fill
4.5d
Gap Downs20 events
Fill Rate
75.0%
Avg Gap
6.4%
Avg 50% Fill
2d
Avg Fill
5d
Avg Gap Fill by Timeframes
Gap Ups
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 55% | 82% | 86% | 86% |
| fills 50% | 18% | 64% | 73% | 77% |
| fills 75% | 18% | 50% | 59% | 64% |
| fills 100% | 5% | 45% | 50% | 55% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 65% | 80% | 80% | 85% |
| fills 50% | 35% | 70% | 75% | 75% |
| fills 75% | 10% | 55% | 65% | 70% |
| fills 100% | 10% | 40% | 50% | 55% |
Active Unfilled Gaps (past 60 days)
4 days ago
2026-07-17
Gap %
-7.83%
Gap From
$22.29
% vs Current
+9.80%
retraced 68% to $21.74
5 days ago
2026-07-16
Gap %
-8.79%
Gap From
$24.92
% vs Current
+22.76%
retraced 22% to $23.20
14 days ago
2026-07-07
Gap %
-6.70%
Gap From
$25.83
% vs Current
+27.24%
retraced 98% to $25.80
25 days ago
2026-06-26
Gap %
-8.11%
Gap From
$27.73
% vs Current
+36.60%
retraced 80% to $27.27
40 days ago
2026-06-11
Gap %
+5.08%
Gap From
$18.90
% vs Current
-6.90%
retraced 2% to $19.84
56 days ago
2026-05-26
Gap %
+15.42%
Gap From
$18.22
% vs Current
-10.25%
retraced 83% to $18.69
Complete Gap History — 42 events
| Date | Gap From | Gap % | Status | Days to 50% | Days to Fill | % of Gap Filled After | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 day | 1 week | 2 week | 4 week | ||||||
| 4 days ago | $22.29 | -7.83% | Open | 1d | — | 68% | 68% | 68% | 68% |
| 5 days ago | $24.92 | -8.79% | Open | — | — | 21% | 21% | 21% | 21% |
| 6 days ago | $23.84 | +7.38% | Filled | 1d | 2d | 79% | 100% | 100% | 100% |
| 14 days ago | $25.83 | -6.70% | Open | 2d | — | 21% | 80% | 98% | 98% |
| 25 days ago | $27.73 | -8.11% | Open | 2d | — | 27% | 80% | 80% | 80% |
| 28 days ago | $27.50 | -5.75% | Filled | 2d | 2d | 49% | 100% | 100% | 100% |
| 29 days ago | $24.08 | +11.71% | Filled | 5d | 11d | 4% | 74% | 100% | 100% |
| 2026-06-18 | $21.76 | +8.59% | Filled | 19d | 20d | 28% | 28% | 28% | 100% |
| 2026-06-11 | $18.90 | +5.08% | Open | — | — | 2% | 2% | 2% | 2% |
| 2026-06-04 | $21.42 | -5.60% | Filled | 1d | 7d | 63% | 63% | 100% | 100% |
| 2026-06-03 | $22.46 | -6.01% | Filled | 9d | 9d | 29% | 29% | 100% | 100% |
| 2026-05-27 | $21.08 | +12.24% | Filled | 1d | 6d | 77% | 100% | 100% | 100% |
| 2026-05-26 | $18.22 | +15.42% | Open | 11d | — | 19% | 19% | 83% | 83% |
| 2026-05-14 | $15.92 | +5.90% | Open | 1d | — | 91% | 91% | 91% | 91% |
| 2026-05-06 | $14.01 | +9.14% | Open | 3d | — | 46% | 67% | 67% | 67% |
| 2026-04-29 | $11.66 | +6.60% | Open | — | — | 43% | 43% | 43% | 43% |
| 2026-04-27 | $12.28 | -5.70% | Filled | 3d | 3d | 30% | 100% | 100% | 100% |
| 2026-04-23 | $12.71 | -5.82% | Filled | 5d | 5d | 18% | 100% | 100% | 100% |
| 2026-04-20 | $11.66 | +7.12% | Filled | 2d | 6d | 34% | 100% | 100% | 100% |
| 2026-04-17 | $10.62 | +11.58% | Open | — | — | 36% | 36% | 36% | 36% |
| 2026-04-16 | $9.95 | +5.23% | Open | — | — | 12% | 12% | 12% | 12% |
| 2026-04-02 | $8.97 | -7.58% | Filled | 1d | 3d | 58% | 100% | 100% | 100% |
| 2026-03-03 | $10.51 | -6.09% | Filled | 32d | 32d | 21% | 21% | 21% | 21% |
| 2026-01-29 | $11.38 | -5.89% | Filled | 55d | 55d | 12% | 12% | 12% | 49% |
| 2026-01-28 | $12.48 | -8.21% | Filled | 57d | 57d | 40% | 40% | 40% | 40% |
| 2026-01-27 | $11.33 | +10.50% | Filled | 2d | 2d | 25% | 100% | 100% | 100% |
| 2026-01-26 | $10.54 | +6.26% | Filled | 4d | 4d | 11% | 100% | 100% | 100% |
| 2026-01-23 | $10.90 | -5.50% | Filled | 2d | 2d | 43% | 100% | 100% | 100% |
| 2026-01-20 | $9.30 | +13.98% | Filled | 10d | 37d | 3% | 26% | 73% | 73% |
| 2026-01-16 | $8.77 | +5.59% | Filled | 43d | 50d | 22% | 22% | 22% | 22% |
| 2026-01-07 | $8.12 | +9.73% | Open | 2d | — | 16% | 56% | 56% | 56% |
| 2025-04-08 | $6.13 | +6.69% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-04-07 | $6.23 | -6.90% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2024-08-05 | $7.88 | -5.08% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2024-07-31 | $7.43 | +6.33% | Filled | 4d | 4d | 23% | 100% | 100% | 100% |
| 2024-07-02 | $8.77 | -6.04% | Filled | 4d | 31d | 19% | 91% | 91% | 91% |
| 2022-11-15 | $7.22 | +5.68% | Filled | 2d | 2d | 45% | 100% | 100% | 100% |
| 2022-07-07 | $6.36 | +5.50% | Filled | 3d | 5d | 6% | 100% | 100% | 100% |
| 2022-06-30 | $6.95 | -5.04% | Filled | 1d | 14d | 63% | 71% | 71% | 100% |
| 2022-06-22 | $7.97 | -6.27% | Open | — | — | 20% | 20% | 20% | 20% |
| 2022-02-24 | $9.41 | -5.63% | Filled | 1d | 2d | 72% | 100% | 100% | 100% |
| 2021-09-03 | $11.75 | +5.70% | Filled | 3d | 3d | 31% | 100% | 100% | 100% |
Frequently Asked Questions
What is UMC's premarket price?
United Microelectronic (UMC) is trading at $24.78 in premarket, up $4.48 (22.07%) from the previous close of $20.30.
Why is UMC moving in premarket?
United Microelectronic (UMC) is up 22.07% from its previous close in premarket trading. Premarket moves are usually driven by company-specific news, earnings results, analyst rating or price-target changes, or broad market and sector sentiment. Check the latest UMC premarket headlines and gap history below for the likely catalyst.
When does UMC premarket trading start?
Premarket trading for UMC on the NYSE runs from 4:00 AM to 9:30 AM Eastern Time, ahead of the regular session (9:30 AM – 4:00 PM ET). After-hours runs from 4:00 PM to 8:00 PM ET.
How often does UMC fill its gaps?
Over the past 5 years, 64% of UMC gap-ups have fully filled and 75% of gap-downs have filled. Median time to fill is 5 trading days for gap-ups and 5 trading days for gap-downs.
Does UMC have any unfilled gaps?
Yes. UMC has 6 unfilled gaps from the past 60 days. The largest is a +15.4% gap up from May 26, 2026 and is currently 83% retraced.
What's the average return after a UMC gap?
Based on 42 qualifying gap events over the past 5 years, the average 20-trading-day return after a UMC gap up is +17.66%, and after a gap down is +17.5%.
When does UMC report earnings?
UMC is scheduled to report earnings on Jul 29, 2026 before the open (confirmed), with an estimated EPS of $0.15. United Microelectronics Corp. (UMC) has officially scheduled its Q2 2026 earnings release and investor conference call for July 29, 2026. The company confirmed this date on its official IR events page and via a recent press release, with the conference call set for 5:00 PM Taiwan Time (5:00 AM ET).