25.62 USD
↘ 2.11 (7.62%)PRE MARKET (AS OF 05:11 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 $25.62 in premarket, down $2.11 (7.62%) from its previous close of $27.73. Historically, 13% of UMC gap-downs of 5% or more have fully filled within one trading day.
📅 UMC is expected to report earnings around Jul 29, 2026 before the open (estimated), 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 37 qualifying gap events (gaps of 5% or more at the open) — 21 gap-ups and 16 gap-downs. Gap-ups averaged +8.3%, 52% have fully filled, median time to fill 4 trading days. Gap-downs averaged -6.1%, 94% have fully filled, median time to fill 5 trading days. Most recent: a -5.8% gap down 3 days ago, which filled in 2 trading days. UMC has 7 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: +19.4%. After a gap down: +16.81%.
Gap Ups21 events
Fill Rate
52.4%
Avg Gap
8.3%
Avg 50% Fill
3d
Avg Fill
4d
Gap Downs16 events
Fill Rate
93.8%
Avg Gap
6.1%
Avg 50% Fill
2d
Avg Fill
5d
Avg Gap Fill by Timeframes
Gap Ups
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 52% | 81% | 86% | 86% |
| fills 50% | 14% | 57% | 67% | 67% |
| fills 75% | 14% | 48% | 52% | 52% |
| fills 100% | 5% | 43% | 43% | 43% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 69% | 81% | 81% | 88% |
| fills 50% | 38% | 69% | 75% | 75% |
| fills 75% | 13% | 56% | 69% | 75% |
| fills 100% | 13% | 50% | 63% | 69% |
Active Unfilled Gaps (past 60 days)
4 days ago
2026-06-22
Gap %
+11.71%
Gap From
$24.08
% vs Current
-13.16%
retraced 36% to $25.88
8 days ago
2026-06-18
Gap %
+8.59%
Gap From
$21.76
% vs Current
-21.53%
retraced 28% to $23.10
15 days ago
2026-06-11
Gap %
+5.08%
Gap From
$18.90
% vs Current
-31.84%
retraced 2% to $19.84
31 days ago
2026-05-26
Gap %
+15.42%
Gap From
$18.22
% vs Current
-34.29%
retraced 83% to $18.69
43 days ago
2026-05-14
Gap %
+5.90%
Gap From
$15.92
% vs Current
-42.59%
retraced 92% to $16.00
51 days ago
2026-05-06
Gap %
+9.14%
Gap From
$14.01
% vs Current
-49.48%
retraced 67% to $14.43
58 days ago
2026-04-29
Gap %
+6.60%
Gap From
$11.66
% vs Current
-57.95%
retraced 43% to $12.10
Complete Gap History — 37 events
| Date | Gap From | Gap % | Status | Days to 50% | Days to Fill | % of Gap Filled After | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 day | 1 week | 2 week | 4 week | ||||||
| 3 days ago | $27.50 | -5.75% | Filled | 2d | 2d | 49% | 100% | 100% | 100% |
| 4 days ago | $24.08 | +11.71% | Open | — | — | 4% | 36% | 36% | 36% |
| 8 days ago | $21.76 | +8.59% | Open | — | — | 28% | 28% | 28% | 28% |
| 15 days ago | $18.90 | +5.08% | Open | — | — | 2% | 2% | 2% | 2% |
| 22 days ago | $21.42 | -5.60% | Filled | 1d | 7d | 63% | 63% | 100% | 100% |
| 23 days ago | $22.46 | -6.01% | Filled | 9d | 9d | 29% | 29% | 100% | 100% |
| 30 days ago | $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 $25.62 in premarket, down $2.11 (7.62%) from the previous close of $27.73.
Why is UMC moving in premarket?
United Microelectronic (UMC) is down 7.62% 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, 52% of UMC gap-ups have fully filled and 94% of gap-downs have filled. Median time to fill is 4 trading days for gap-ups and 5 trading days for gap-downs.
Does UMC have any unfilled gaps?
Yes. UMC has 7 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 37 qualifying gap events over the past 5 years, the average 20-trading-day return after a UMC gap up is +19.4%, and after a gap down is +16.81%.
When does UMC report earnings?
UMC is expected to report earnings around Jul 29, 2026 before the open (estimated), with an estimated EPS of $0.15.