Astera Labs, Inc. 4

Philip Mazzara, General Counsel and Secretary of Astera Labs, Inc. (ALAB), sold 6,896 shares of Common Stock on August 17, 2026 in automatic tax-withholding (“sell to cover”) transactions totaling about $2.37 million.

On August 17, 2026, Philip Mazzara, General Counsel and Secretary of Astera Labs, Inc., executed a series of automatic open-market sales of the company’s Common Stock solely to satisfy tax withholding obligations arising from the vesting and settlement of previously granted restricted stock units. Across multiple block trades at weighted-average prices ranging from approximately $333.64 to $352.10 per share, Mazzara sold an aggregate of 6,896 shares for total proceeds of roughly $2.37 million. These transactions were effected pursuant to an issuer-mandated “sell to cover” election and are characterized in the Form 4 as non-discretionary, with Mazzara’s direct ownership decreasing from 103,438 shares prior to the sales to 96,542 shares afterward, still representing a substantial ongoing equity stake.

Filing Facts

CIK

1736297

Ticker

ALAB

Form

4

Source Type

sec

Accession

0001998163-26-000022

Alert Tier

8