Astera Labs, Inc. — Director's Dealing 2025

May 21, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Astera Labs, Inc. (ALAB)
CIK: 0001736297
Period of Report: 2025-05-16

Reporting Person: Mazzara Philip (General Counsel and Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-16	Common Stock	S	369	$92.1546	Disposed	191036	Direct
2025-05-16	Common Stock	S	1779	$90.6733	Disposed	189257	Direct
2025-05-16	Common Stock	S	1661	$90.3345	Disposed	187596	Direct
2025-05-19	Common Stock	S	25000	$90.1291	Disposed	162596	Direct

Footnotes

F1: 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.

F2: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $91.7300 to $92.5550, 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.

F3: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $90.4250 to $91.4200, 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.

F4: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $90.2400 to $90.4200, 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.

F5: The sales reported in this Form 4 occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 21, 2024.

F6: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $90.0000 to $90.4500, 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.