New York, Jan 5, 2026, 13:45 EST — Regular session
- Astera Labs shares fell about 8% in afternoon trading, reversing an early rise.
- A regulatory filing showed a company officer plans to sell about $5 million worth of stock under SEC Rule 144. 1
- Traders are looking to Friday’s U.S. jobs report and the Fed’s late-January meeting for the next big macro test. 2
Astera Labs shares fell 8.4% to $164.50 on Monday, after swinging from a session high near $185 to a low around $162.5. More than 5 million shares had traded by early afternoon.
The move matters because Astera has become a high-volatility proxy for investor appetite for AI infrastructure spending, where sentiment can turn quickly on positioning and supply. A sharp reversal early in the year can amplify stop-loss selling and make intraday liquidity more fragile.
Insider-selling signals draw extra attention in fast-rising semiconductor names, even when the amounts are small relative to market value. With investors also calibrating interest-rate expectations, any perceived supply overhang can weigh on higher-growth stocks that depend on confidence in future cash flows.
A Form 144 filing dated Friday showed Philip Mazzara, Astera’s general counsel and secretary, proposed to sell 30,000 shares, with an aggregate market value listed at about $4.99 million, through Morgan Stanley Smith Barney. 1
Form 144 is a notice filed under SEC Rule 144 when an affiliate plans to sell restricted or controlled shares. It signals intent and does not confirm the sale has occurred.
Astera’s slide came even as semiconductor exchange-traded funds were higher, leaving the stock as a notable laggard in the group. The iShares Semiconductor ETF rose about 1.4% and VanEck’s Semiconductor ETF gained a similar amount, while high-speed connectivity peer Credo Technology fell more than 6%.
Astera makes connectivity chips and modules used in cloud and AI systems, including products tied to standards such as PCIe and CXL, which help connect processors, accelerators and memory in large data centers.
Investors will be watching whether Monday’s intraday low holds into the close and whether additional insider filings follow. The next test for the bullish case is whether demand signals from hyperscale customers remain strong into the company’s next results cycle.
The risk is that planned insider sales broaden and add steady supply at a time when the stock is already prone to large swings. A renewed jump in rate expectations would be another downside scenario, as it typically compresses valuations for growth-heavy chip names.
