Astera Labs shares surge 18.65% after-hours as Scorpio X-Series AI upgrades and Q4 earnings optimism drive demand.

Astera Labs, Inc. (ALAB) surged 18.65% in after-hours trading, driven by a combination of strategic product advancements and positive earnings expectations. The stock’s rise follows the company’s announcement of major enhancements to its Scorpio X-Series, including higher radix support, in-network computing, and hypercast technology tailored for hyperscale AI infrastructure. These upgrades reinforce Astera’s position in high-speed connectivity for AI data centers, a segment with robust demand. Additionally, investor sentiment was bolstered by anticipation of Q4 2025 earnings, scheduled for February 10, with Wall Street forecasting $249 million in revenue and $0.51 EPS. Analysts highlighted Astera’s strong gross margins, debt-free balance sheet, and leadership in AI infrastructure, positioning the stock as a "Moderate Buy" ahead of the earnings report. The move reflects confidence in the company’s ability to capitalize on AI-driven growth and sustain momentum in a competitive semiconductor sector.