NEW YORK, January 3, 2026, 15:35 ET — Market closed
- Astera Labs shares ended Friday up 7.93% at $179.56 and ticked up 0.44% in after-hours trading.
- The move tracked a broad rebound in chipmakers that lifted the Philadelphia Semiconductor Index about 4%, Reuters reported. 1
- A company officer filed a Form 144 disclosing plans to sell up to 30,000 shares, a filing showed.
Shares of Astera Labs (ALAB.O) ended Friday up 7.9% at $179.56 and last traded at $180.35 in after-hours activity, after the semiconductor sector rebounded to start 2026.
The move came as chip stocks led Wall Street higher on the first trading day of the year, with the Philadelphia Semiconductor Index — which tracks major U.S.-listed chipmakers — rising about 4%, Reuters reported. 1
That matters for Astera because investors have treated the maker of connectivity chips used in AI servers and data-center racks as a high-beta read on AI hardware sentiment. “The market has had more of this ‘buy the dip, sell the rip’ mentality,” Joe Mazzola, head of trading and derivatives strategist at Charles Schwab, told Reuters. 1
A regulatory filing also flagged potential insider selling. Astera’s general counsel and secretary, Philip Mazzara, filed a Form 144 with the U.S. Securities and Exchange Commission on Friday.
The notice said Mazzara intends to sell up to 30,000 shares on Nasdaq through Morgan Stanley Smith Barney, with an aggregate market value of about $5.0 million.
Form 144 is a required notice when insiders plan to sell restricted shares under SEC Rule 144; it does not confirm a sale has occurred. The filing said the shares were acquired through exercised stock options and that the sale is under a 10b5-1 plan — a pre-arranged trading program adopted in May 2025.
Astera, based in San Jose, California, sells semiconductor-based connectivity products for rack-scale AI infrastructure, including signal conditioning, smart cable modules and switch fabrics, the company has said.
In its last quarterly update in November, Astera posted record revenue of $230.6 million and projected fourth-quarter revenue of $245 million to $253 million.
Friday’s rebound followed a volatile end to 2025, with investors weighing interest-rate expectations, valuations across AI-linked shares and headline risk around trade policy, Reuters reported. 1
Before markets reopen on Monday, Jan. 5, traders will be watching whether ALAB holds above Friday’s $171.69 intraday low and retests the $182.90 high after the gap-up move.
On the company calendar, Nasdaq’s earnings page lists Feb. 9 as an estimated next earnings announcement date for Astera — a reminder that guidance and AI demand commentary are likely to be the next major catalysts. 2
Macro data could still set the tone for rate-sensitive tech. Strategists have pointed to next week’s U.S. labor-market releases as potential drivers for Treasury yields and equity valuations, and traders will be watching whether Friday’s chip-led bounce extends into the new week. 1
