Pre-market price movements and significant market activity for Astera Labs, Inc. Common Stock ($ALAB). Each move is flagged by Z-score statistical significance — showing when $ALAB moved beyond its typical daily range. 3 significant moves detected in the last 30 days.
Current Market State
What May Be Driving ALAB?
ALAB jumped 5.25% in an extreme 3.50 Z-score move amid a broader semiconductor sector rebound and strong AI demand.
Astera Labs, Inc. Common Stock operates in the Technology sector, specifically Semiconductors & Related Devices. Sector-wide movement can contribute to individual stock volatility.
Recent Unusual Moves (30 days)
| Date | Session | Price | Move | Z-Score | Rel. Vol. |
|---|---|---|---|---|---|
| Sep 21, 2026 | Pre-market | $313.49 | +3.38% | 2.25 | — |
| Sep 21, 2026 | Regular | $342.25 | +12.86% | 8.57 | — |
| Sep 21, 2026 | After-hours | $341.50 | +12.61% | 8.41 | — |
About ALAB Premarket Movers
This page tracks unusual market activity for Astera Labs, Inc. Common Stock (ALAB) across all trading sessions — pre-market (4:00 AM–9:30 AM ET), regular hours (9:30 AM–4:00 PM ET), and after-hours (4:00 PM–8:00 PM ET). A move is flagged as "unusual" when its Z-score reaches 2 or higher, meaning the price change is statistically significant relative to ALAB's recent daily volatility.
Z-score is calculated by comparing each move to the 20-day average return and standard deviation. A Z-score of 2.0 means the move is 2 standard deviations beyond the average — occurring in roughly the top 5% of daily moves. Relative volume (RVOL) compares current volume to the 20-day average volume at the same time of day, helping distinguish genuine institutional activity from noise.