258.75 USD
↗ 1.71 (0.67%)AFTER HOURS (AS OF Mon 04:00 PM EDT)
ALAB Stock After Hours
Astera Labs, Inc. Common Stock
ALABNASDAQ • USD
Market: OPEN
After-hours trading runs 4:00 PM – 8:00 PM ET.
ALAB last traded at $258.75 after hours, up $1.71 (0.67%) from its regular-session close of $257.04.
Related After HoursCRDO
ALAB After Hours Chart
Gap Analytics — 5-year history, 5% minimum gap
Over the past 5 years, ALAB has had 63 qualifying gap events (gaps of 5% or more at the open) — 35 gap-ups and 28 gap-downs. Gap-ups averaged +8.4%, 74% have fully filled, median time to fill 2 trading days. Gap-downs averaged -7.4%, 89% have fully filled, median time to fill 3 trading days. Most recent: a -7.5% gap down 1 day ago, still unfilled. ALAB has 2 unfilled gaps from the past 60 days; the largest is a +13% gap up on Jul 30, 2026, currently 79% retraced. Average 20-trading-day return after a ALAB gap up: +9.67%. After a gap down: +8.33%.
Gap Ups35 events
Fill Rate
74.3%
Avg Gap
8.4%
Avg 50% Fill
1d
Avg Fill
2d
Gap Downs28 events
Fill Rate
89.3%
Avg Gap
7.4%
Avg 50% Fill
1d
Avg Fill
3d
Avg Gap Fill by Timeframes
Gap Ups
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 71% | 91% | 91% | 91% |
| fills 50% | 51% | 80% | 80% | 80% |
| fills 75% | 37% | 71% | 71% | 74% |
| fills 100% | 23% | 63% | 69% | 74% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 75% | 82% | 86% | 89% |
| fills 50% | 57% | 75% | 82% | 89% |
| fills 75% | 39% | 75% | 79% | 86% |
| fills 100% | 25% | 71% | 75% | 86% |
Active Unfilled Gaps (past 60 days)
1 day ago
2026-09-14
Gap %
-7.54%
Gap From
$291.22
% vs Current
+13.30%
retraced 14% to $272.28
47 days ago
2026-07-30
Gap %
+12.99%
Gap From
$249.74
% vs Current
-2.84%
retraced 79% to $256.52
Complete Gap History — 63 events
| Date | Gap From | Gap % | Status | Days to 50% | Days to Fill | % of Gap Filled After | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 day | 1 week | 2 week | 4 week | ||||||
| 1 day ago | $291.22 | -7.54% | Open | — | — | 14% | 14% | 14% | 14% |
| 28 days ago | $320.17 | -5.05% | Filled | 14d | 14d | 49% | 49% | 49% | 100% |
| 29 days ago | $321.61 | +7.26% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2026-08-12 | $311.99 | +7.21% | Filled | 1d | 2d | 72% | 100% | 100% | 100% |
| 2026-08-04 | $321.05 | +7.78% | Filled | 2d | 2d | 24% | 100% | 100% | 100% |
| 2026-07-31 | $299.69 | +9.55% | Filled | 1d | 2d | 81% | 100% | 100% | 100% |
| 2026-07-30 | $249.74 | +12.99% | Open | 26d | — | 28% | 28% | 28% | 49% |
| 2026-07-28 | $282.52 | -5.50% | Filled | 3d | 3d | 11% | 100% | 100% | 100% |
| 2026-07-21 | $309.09 | +5.65% | Filled | 1d | 2d | 73% | 100% | 100% | 100% |
| 2026-07-14 | $362.05 | +8.28% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2026-07-09 | $393.16 | +6.28% | Filled | 2d | 3d | 23% | 100% | 100% | 100% |
| 2026-07-07 | $432.74 | -6.84% | Filled | 3d | 3d | 48% | 100% | 100% | 100% |
| 2026-06-25 | $399.92 | +5.67% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2026-06-23 | $439.66 | -9.15% | Filled | 1d | 5d | 50% | 100% | 100% | 100% |
| 2026-05-15 | $228.64 | -5.31% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2026-05-06 | $215.69 | +6.52% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2026-04-28 | $196.64 | -7.85% | Filled | 1d | 2d | 58% | 100% | 100% | 100% |
| 2026-04-21 | $175.80 | +7.37% | Open | 6d | — | 41% | 71% | 71% | 71% |
| 2026-04-08 | $118.99 | +7.57% | Open | 1d | — | 67% | 67% | 67% | 67% |
| 2026-03-05 | $113.77 | +5.07% | Filled | 2d | 3d | 37% | 100% | 100% | 100% |
| 2026-02-11 | $182.86 | -12.09% | Filled | 43d | 48d | 6% | 6% | 6% | 6% |
| 2026-02-06 | $142.82 | +6.73% | Filled | 4d | 4d | 10% | 100% | 100% | 100% |
| 2025-12-09 | $175.74 | -6.63% | Filled | 1d | 15d | 65% | 89% | 97% | 100% |
| 2025-12-03 | $142.94 | +5.16% | Filled | 1d | 10d | 77% | 77% | 100% | 100% |
| 2025-11-20 | $142.01 | +8.78% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-11-04 | $191.56 | -5.32% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-10-31 | $169.55 | +7.05% | Filled | 4d | 5d | 4% | 100% | 100% | 100% |
| 2025-10-15 | $161.55 | +5.58% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-10-14 | $199.53 | -7.86% | Filled | 14d | 14d | 1% | 1% | 1% | 100% |
| 2025-10-06 | $200.74 | +13.86% | Filled | 2d | 6d | 42% | 100% | 100% | 100% |
| 2025-09-29 | $197.78 | +5.28% | Filled | 1d | 2d | 95% | 100% | 100% | 100% |
| 2025-09-25 | $205.27 | -6.20% | Filled | 1d | 3d | 99% | 100% | 100% | 100% |
| 2025-09-24 | $230.11 | -7.87% | Filled | 9d | 9d | 9% | 9% | 100% | 100% |
| 2025-09-10 | $214.49 | +5.10% | Filled | 1d | 11d | 77% | 77% | 100% | 100% |
| 2025-08-06 | $135.54 | +21.73% | Open | 55d | — | 15% | 15% | 15% | 15% |
| 2025-08-01 | $136.73 | -7.43% | Filled | 1d | 2d | 74% | 100% | 100% | 100% |
| 2025-07-21 | $102.13 | +8.47% | Open | — | — | 1% | 36% | 36% | 36% |
| 2025-05-12 | $71.20 | +12.41% | Open | — | — | 40% | 40% | 40% | 40% |
| 2025-05-07 | $71.36 | -5.61% | Filled | 1d | 2d | 99% | 100% | 100% | 100% |
| 2025-05-01 | $65.31 | +5.04% | Filled | 5d | 5d | 11% | 100% | 100% | 100% |
| 2025-04-23 | $55.31 | +9.82% | Open | — | — | 26% | 26% | 26% | 26% |
| 2025-04-16 | $60.08 | -5.86% | Filled | 1d | 5d | 80% | 100% | 100% | 100% |
| 2025-04-14 | $60.13 | +5.26% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-04-08 | $55.16 | +7.54% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-04-07 | $52.94 | -8.37% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-04-04 | $55.68 | -5.78% | Filled | 2d | 2d | 39% | 100% | 100% | 100% |
| 2025-04-03 | $64.08 | -9.35% | Filled | 5d | 5d | 32% | 100% | 100% | 100% |
| 2025-03-12 | $66.05 | +5.84% | Filled | 1d | 2d | 58% | 100% | 100% | 100% |
| 2025-03-06 | $68.57 | -6.17% | Filled | 2d | 5d | 45% | 100% | 100% | 100% |
| 2025-02-11 | $103.29 | -5.98% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-02-03 | $101.42 | -12.34% | Filled | 1d | 2d | 96% | 100% | 100% | 100% |
| 2025-01-28 | $83.16 | +6.80% | Filled | 1d | 19d | 88% | 88% | 88% | 100% |
| 2025-01-27 | $115.55 | -11.52% | Open | 9d | — | 6% | 28% | 67% | 67% |
| 2024-11-21 | $97.42 | +5.05% | Filled | 5d | 5d | 21% | 100% | 100% | 100% |
| 2024-11-06 | $95.91 | -6.16% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2024-11-05 | $69.65 | +23.98% | Open | — | — | 13% | 13% | 13% | 13% |
| 2024-10-09 | $52.96 | +15.48% | Open | — | — | 21% | 21% | 21% | 21% |
| 2024-08-05 | $42.38 | -11.47% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2024-08-02 | $40.45 | -5.98% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2024-07-31 | $42.22 | +5.19% | Filled | 2d | 2d | 43% | 100% | 100% | 100% |
| 2024-05-08 | $76.19 | -6.73% | Filled | 1d | 6d | 61% | 100% | 100% | 100% |
| 2024-05-01 | $84.76 | -5.00% | Open | — | — | 2% | 17% | 17% | 17% |
| 2024-03-21 | $62.03 | +6.40% | Filled | 1d | 21d | 64% | 64% | 64% | 100% |
Frequently Asked Questions
What is ALAB's after-hours price?
Astera Labs (ALAB) is trading at $258.75 after hours, up $1.71 (0.67%) from its regular-session close of $257.04.
Why is ALAB moving after hours?
ALAB is up 0.67% in after-hours trading. Moves in this session almost always follow something released after the 4:00 PM ET close — an earnings report, guidance, a filing, or news — and trade on far thinner volume than the regular session, so the size of the move can overstate what the market will settle on at the next open.
When does ALAB after-hours trading start and end?
After-hours trading in ALAB on the NASDAQ runs from 4:00 PM to 8:00 PM ET on trading days, immediately after the regular session closes. Not every broker offers the full window, and liquidity thins sharply after about 6:30 PM ET.
Will ALAB's after-hours move hold at the open?
An after-hours move that carries into the next session becomes an opening gap, and ALAB's gap history is the best guide to what happens next: 74% of ALAB gap-ups have fully filled, and 89% of gap-downs have filled over the past 5 years. Fill rates this high mean a large after-hours move is more often faded than extended.