280.01 USD
↘ 0.49 (0.18%)PRE MARKET (AS OF 09:29 AM EDT)
MKSI Stock Premarket
MKS Inc. Common Stock
MKSINASDAQ • USD
Market: OPEN
Premarket trading runs 4:00 AM – 9:30 AM ET.
MKSI last traded at $280.01 in premarket, down $0.49 (0.17%) from its previous close of $280.50.
📅 MKSI is expected to report earnings around Nov 4, 2026 after the close (estimated), with an estimated EPS of $3.63. MKSI earnings details →
MKSI Premarket Chart
MKSI Premarket News
Gap Analytics — 5-year history, 5% minimum gap
Over the past 5 years, MKSI has had 39 qualifying gap events (gaps of 5% or more at the open) — 22 gap-ups and 17 gap-downs. Gap-ups averaged +7.2%, 68% have fully filled, median time to fill 3 trading days. Gap-downs averaged -6.1%, 88% have fully filled, median time to fill 5 trading days. Most recent: a -7.1% gap down on Sep 14, 2026, which filled in 13 trading days. MKSI has 1 unfilled gap from the past 60 days — a -5.3% gap down on Aug 18, 2026, currently 31% retraced. Average 20-trading-day return after a MKSI gap up: +0.36%. After a gap down: +1.88%.
Gap Ups22 events
Fill Rate
68.2%
Avg Gap
7.2%
Avg 50% Fill
1d
Avg Fill
3d
Gap Downs17 events
Fill Rate
88.2%
Avg Gap
6.1%
Avg 50% Fill
2.5d
Avg Fill
5d
Avg Gap Fill by Timeframes
Gap Ups
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 59% | 77% | 82% | 86% |
| fills 50% | 41% | 59% | 68% | 73% |
| fills 75% | 27% | 59% | 68% | 73% |
| fills 100% | 5% | 50% | 59% | 59% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 65% | 88% | 94% | 94% |
| fills 50% | 41% | 76% | 88% | 88% |
| fills 75% | 35% | 71% | 88% | 88% |
| fills 100% | 18% | 65% | 76% | 82% |
Active Unfilled Gaps (past 60 days)
49 days ago
2026-08-18
Gap %
-5.26%
Gap From
$320.74
% vs Current
+14.35%
retraced 31% to $309.15
Complete Gap History — 39 events
| Date | Gap From | Gap % | Status | Days to 50% | Days to Fill | % of Gap Filled After | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 day | 1 week | 2 week | 4 week | ||||||
| 22 days ago | $267.31 | -7.10% | Filled | 6d | 13d | 11% | 56% | 81% | 100% |
| 2026-08-18 | $320.74 | -5.26% | Open | — | — | 31% | 31% | 31% | 31% |
| 2026-08-12 | $294.38 | +6.29% | Filled | 3d | 6d | 40% | 100% | 100% | 100% |
| 2026-08-06 | $313.10 | -7.05% | Filled | 1d | 5d | 84% | 100% | 100% | 100% |
| 2026-08-04 | $309.98 | +5.58% | Filled | 2d | 3d | 39% | 100% | 100% | 100% |
| 2026-07-31 | $293.30 | +5.69% | Filled | 1d | 2d | 95% | 100% | 100% | 100% |
| 2026-07-30 | $257.61 | +12.11% | Filled | 18d | 22d | 13% | 13% | 13% | 78% |
| 2026-07-28 | $315.70 | -6.14% | Filled | 4d | 6d | 3% | 100% | 100% | 100% |
| 2026-07-21 | $324.28 | +7.09% | Filled | 1d | 5d | 59% | 100% | 100% | 100% |
| 2026-07-17 | $332.00 | -5.11% | Filled | 1d | 2d | 92% | 100% | 100% | 100% |
| 2026-07-14 | $352.03 | +6.02% | Filled | 1d | 2d | 94% | 100% | 100% | 100% |
| 2026-07-09 | $349.39 | +5.94% | Filled | 2d | 3d | 19% | 100% | 100% | 100% |
| 2026-07-07 | $368.06 | -6.85% | Filled | 2d | 3d | 40% | 100% | 100% | 100% |
| 2026-06-25 | $381.62 | +6.91% | Filled | 1d | 6d | 93% | 100% | 100% | 100% |
| 2026-06-23 | $420.56 | -7.58% | Filled | 3d | 6d | 18% | 100% | 100% | 100% |
| 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% |
Related: MKSI quote & chart · After hours · Technical analysis · Fundamentals · Earnings · Short interest
Frequently Asked Questions
What is MKSI's premarket price?
MKS (MKSI) is trading at $280.01 in premarket, down $0.49 (0.17%) from the previous close of $280.50.
Why is MKSI moving in premarket?
MKS (MKSI) is down 0.17% 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 MKSI premarket headlines and gap history below for the likely catalyst.
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, 68% of MKSI gap-ups have fully filled and 88% of gap-downs have filled. Median time to fill is 3 trading days for gap-ups and 5 trading days for gap-downs.
Does MKSI have any unfilled gaps?
Yes. MKSI has 1 unfilled gap from the past 60 days. The largest is a -5.3% gap down from Aug 18, 2026 and is currently 31% retraced.
What's the average return after a MKSI gap?
Based on 39 qualifying gap events over the past 5 years, the average 20-trading-day return after a MKSI gap up is +0.36%, and after a gap down is +1.88%.
When does MKSI report earnings?
MKSI is expected to report earnings around Nov 4, 2026 after the close (estimated), with an estimated EPS of $3.63.