330.23 USD
PREVIOUS CLOSE
MKSI Stock Premarket
MKS Inc. Common Stock
MKSINASDAQ • USD
Market: CLOSED
Premarket trading runs 4:00 AM – 9:30 AM ET.
MKSI Premarket Chart
MKSI Premarket News
Gap Analytics — 5-year history, 5% minimum gap
Over the past 5 years, MKSI has had 24 qualifying gap events (gaps of 5% or more at the open) — 14 gap-ups and 10 gap-downs. Gap-ups averaged +7.3%, 50% have fully filled, median time to fill 3 trading days. Gap-downs averaged -5.8%, 90% have fully filled, median time to fill 3 trading days. Most recent: a +6% gap up on May 8, 2026, which filled in 3 trading days. Average 20-trading-day return after a MKSI gap up: +11.54%. After a gap down: +9.47%.
Gap Ups14 events
Fill Rate
50.0%
Avg Gap
7.3%
Avg 50% Fill
1d
Avg Fill
3d
Gap Downs10 events
Fill Rate
90.0%
Avg Gap
5.8%
Avg 50% Fill
2d
Avg Fill
3d
Avg Gap Fill by Timeframes
Gap Ups
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 50% | 71% | 79% | 79% |
| fills 50% | 36% | 43% | 57% | 57% |
| fills 75% | 21% | 43% | 57% | 57% |
| fills 100% | 7% | 29% | 43% | 43% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 70% | 80% | 90% | 90% |
| fills 50% | 50% | 70% | 90% | 90% |
| fills 75% | 40% | 70% | 90% | 90% |
| fills 100% | 30% | 60% | 80% | 80% |
Complete Gap History — 24 events
| Date | Gap From | Gap % | Status | Days to 50% | Days to Fill | % of Gap Filled After | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 day | 1 week | 2 week | 4 week | ||||||
| 2026-05-08 | $300.79 | +5.95% | Filled | 1d | 3d | 55% | 100% | 100% | 100% |
| 2026-05-07 | $293.77 | +7.63% | Filled | 1d | 8d | 91% | 91% | 100% | 100% |
| 2026-04-08 | $238.17 | +7.90% | Open | — | — | 37% | 37% | 37% | 37% |
| 2026-04-02 | $235.96 | -5.74% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2026-02-18 | $262.94 | -7.44% | Filled | 1d | 3d | 90% | 100% | 100% | 100% |
| 2026-01-15 | $190.30 | +7.72% | Open | — | — | 18% | 34% | 34% | 34% |
| 2025-11-06 | $139.92 | +5.22% | Filled | 6d | 7d | 10% | 85% | 100% | 100% |
| 2025-10-13 | $121.26 | +6.75% | Open | — | — | 21% | 31% | 31% | 31% |
| 2025-08-07 | $89.62 | +8.40% | Open | — | — | 21% | 21% | 21% | 21% |
| 2025-05-12 | $80.05 | +9.01% | Open | 10d | — | 6% | 6% | 79% | 98% |
| 2025-04-23 | $62.86 | +8.00% | Open | — | — | 11% | 11% | 11% | 11% |
| 2025-04-10 | $73.20 | -5.61% | Filled | 9d | 10d | 1% | 10% | 100% | 100% |
| 2025-04-08 | $62.99 | +5.37% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-04-07 | $60.29 | -5.14% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-04-04 | $64.27 | -5.72% | Filled | 1d | 2d | 55% | 100% | 100% | 100% |
| 2025-04-03 | $81.28 | -5.68% | Filled | 25d | 27d | 12% | 12% | 12% | 14% |
| 2025-02-13 | $111.20 | -5.49% | Open | 5d | — | 43% | 88% | 88% | 88% |
| 2024-11-07 | $103.29 | +14.00% | Filled | 7d | 30d | 32% | 47% | 89% | 89% |
| 2024-08-05 | $106.56 | -5.55% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2024-05-09 | $123.38 | +5.16% | Filled | 1d | 3d | 96% | 100% | 100% | 100% |
| 2023-12-15 | $99.14 | -5.20% | Filled | 3d | 5d | 47% | 100% | 100% | 100% |
| 2022-12-13 | $84.26 | +5.34% | Filled | 1d | 3d | 67% | 100% | 100% | 100% |
| 2022-11-10 | $65.09 | +6.08% | Open | — | — | 9% | 9% | 9% | 9% |
| 2022-11-03 | $79.96 | -6.34% | Filled | 7d | 7d | 5% | 47% | 100% | 100% |
Frequently Asked Questions
What is MKSI's premarket price?
No premarket activity has been recorded yet for MKSI today. The previous regular-session close was $330.23.
When does MKSI premarket trading start?
Premarket trading for MKSI on the NASDAQ 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 MKSI fill its gaps?
Over the past 5 years, 50% of MKSI gap-ups have fully filled and 90% of gap-downs have filled. Median time to fill is 3 trading days for gap-ups and 3 trading days for gap-downs.
Does MKSI have any unfilled gaps?
No. MKSI has no unfilled gap events from the past 60 days; all recent gaps have been filled.
What's the average return after a MKSI gap?
Based on 24 qualifying gap events over the past 5 years, the average 20-trading-day return after a MKSI gap up is +11.54%, and after a gap down is +9.47%.