139.62 USD
↗ 4.36 (3.33%)PRE MARKET (AS OF 05:29 AM EDT)
ZS Stock Premarket
Zscaler, Inc. Common Stock
ZSNASDAQ • USD
Market: CLOSED
Premarket trading runs 4:00 AM – 9:30 AM ET.
ZS Premarket Chart
ZS Premarket News
Gap Analytics — 5-year history, 5% minimum gap
Over the past 5 years, ZS has had 24 qualifying gap events (gaps of 5% or more at the open) — 10 gap-ups and 14 gap-downs. Gap-ups averaged +9.9%, 90% have fully filled, median time to fill 11 trading days. Gap-downs averaged -11%, 64% have fully filled, median time to fill 3 trading days. Most recent: a -25.7% gap down 11 days ago, still unfilled. ZS has 1 unfilled gap from the past 60 days — a -25.7% gap down on May 27, 2026, currently 43% retraced. Average 20-trading-day return after a ZS gap up: -0.95%. After a gap down: -3.94%.
Gap Ups10 events
Fill Rate
90.0%
Avg Gap
9.9%
Avg 50% Fill
2d
Avg Fill
11d
Gap Downs14 events
Fill Rate
64.3%
Avg Gap
11.0%
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% | 80% | 80% | 90% |
| fills 50% | 40% | 70% | 80% | 90% |
| fills 75% | 30% | 40% | 60% | 80% |
| fills 100% | 30% | 40% | 50% | 70% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 36% | 79% | 86% | 86% |
| fills 50% | 21% | 57% | 57% | 57% |
| fills 75% | 14% | 57% | 57% | 57% |
| fills 100% | 0% | 43% | 43% | 43% |
Active Unfilled Gaps (past 60 days)
11 days ago
2026-05-27
Gap %
-25.70%
Gap From
$184.60
% vs Current
+41.15%
retraced 43% to $157.70
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 | ||||||
| 11 days ago | $184.60 | -25.70% | Open | — | — | 5% | 43% | 43% | 43% |
| 2026-05-07 | $138.83 | +6.61% | Filled | 5d | 14d | 9% | 54% | 54% | 100% |
| 2026-03-27 | $141.50 | -5.45% | Filled | 2d | 3d | 25% | 100% | 100% | 100% |
| 2026-02-27 | $167.36 | -13.39% | Filled | 4d | 56d | 27% | 94% | 95% | 95% |
| 2025-11-26 | $289.73 | -6.78% | Open | — | — | 0% | 0% | 0% | 0% |
| 2024-12-03 | $208.51 | -6.05% | Filled | 1d | 2d | 54% | 100% | 100% | 100% |
| 2024-09-04 | $193.19 | -17.83% | Filled | 23d | 27d | 14% | 18% | 43% | 49% |
| 2024-08-05 | $169.52 | -7.67% | Filled | 1d | 3d | 93% | 100% | 100% | 100% |
| 2024-05-31 | $156.65 | +16.82% | Filled | 1d | 45d | 74% | 74% | 74% | 74% |
| 2024-03-01 | $241.97 | -6.19% | Open | — | — | 2% | 2% | 2% | 2% |
| 2024-02-21 | $249.04 | -14.47% | Filled | 3d | 5d | 10% | 100% | 100% | 100% |
| 2023-05-08 | $89.46 | +20.15% | Open | — | — | 21% | 21% | 21% | 21% |
| 2023-03-03 | $134.13 | -10.91% | Filled | 56d | 60d | 20% | 43% | 43% | 43% |
| 2022-12-13 | $121.24 | +5.92% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2022-12-02 | $144.50 | -11.91% | Open | 42d | — | 31% | 31% | 31% | 31% |
| 2022-11-30 | $134.85 | -5.83% | Filled | 1d | 2d | 83% | 100% | 100% | 100% |
| 2022-11-15 | $136.85 | +5.04% | Filled | 2d | 3d | 5% | 100% | 100% | 100% |
| 2022-11-10 | $116.25 | +8.90% | Filled | 17d | 18d | 10% | 10% | 10% | 100% |
| 2022-09-09 | $154.25 | +13.42% | Filled | 10d | 22d | 9% | 48% | 91% | 91% |
| 2022-05-27 | $142.13 | +10.08% | Filled | 3d | 11d | 44% | 72% | 100% | 100% |
| 2022-05-20 | $132.30 | +5.39% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2022-02-25 | $263.38 | -14.77% | Open | 2d | — | 9% | 94% | 94% | 94% |
| 2021-12-14 | $308.54 | -7.49% | Filled | 2d | 2d | 10% | 100% | 100% | 100% |
| 2021-12-01 | $346.97 | +6.94% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
Frequently Asked Questions
What is ZS's premarket price?
Zscaler (ZS) is trading at $139.62 in premarket, up $4.36 (+3.33%) from the previous close of $135.26.
When does ZS premarket trading start?
Premarket trading for ZS 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 ZS fill its gaps?
Over the past 5 years, 90% of ZS gap-ups have fully filled and 64% of gap-downs have filled. Median time to fill is 11 trading days for gap-ups and 3 trading days for gap-downs.
Does ZS have any unfilled gaps?
Yes. ZS has 1 unfilled gap from the past 60 days. The largest is a -25.7% gap down from May 27, 2026 and is currently 43% retraced.
What's the average return after a ZS gap?
Based on 24 qualifying gap events over the past 5 years, the average 20-trading-day return after a ZS gap up is -0.95%, and after a gap down is -3.94%.