X0508 4 2026-02-17 0 0001736297 Astera Labs, Inc. ALAB 0001998163 Mazzara Philip C/O ASTERA LABS, INC. 2345 NORTH FIRST STREET SAN JOSE CA 95131 0 1 0 0 General Counsel and Secretary 0 Common Stock 2026-02-17 4 S 0 309 122.1556 D 142624 D Common Stock 2026-02-17 4 S 0 1713 122.8446 D 140911 D Common Stock 2026-02-17 4 S 0 1435 123.9289 D 139476 D Common Stock 2026-02-17 4 S 0 923 124.6558 D 138553 D Common Stock 2026-02-17 4 S 0 469 126.34 D 138084 D Represents shares of the Issuer's Common Stock required to be sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting and settlement of restricted stock units previously granted to the Reporting Person. Such sales were automatic and mandated by an election of the Issuer made in advance of the vesting event to require the satisfaction of tax withholding obligations to be funded by a "sell to cover", and does not represent a discretionary trade by the Reporting Person. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $122.1000 to $122.2800, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $122.3200 to $123.3000, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $123.3300 to $124.3200, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $124.3500 to $125.3200, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Philip Mazzara 2026-02-19