X0609 4 2026-10-01 0001736297 Astera Labs, Inc. ALAB 0001484394 Dyckerhoff Stefan A false 755 PAGE MILL ROAD, SUITE A-200 PALO ALTO CA 94304-1005 true false false false 1 Common Stock 2026-10-01 4 A 0 68 311.57 A 50524 D Common Stock 2026-10-07 4 S 0 3505 376.06 D 47019 D Common Stock 2026-10-07 4 S 0 8333 376.06 D 286400 I By Trust Common Stock 2026-10-07 4 S 0 661 376.06 D 2648 I By Limited Partnership (TF) Common Stock 3767 I By DIFT-2 Common Stock 3765 I By DIFT-AMD Common Stock 3765 I By DIFT-BAD Common Stock 3765 I By DIFT-SHD Common Stock 3765 I By DIFT-IND These shares represent an award of restricted stock units ("RSUs") granted on October 1, 2026, under the Astera Labs, Inc. 2024 Stock Option and Incentive Plan in lieu of cash compensation for quarterly non-employee director retainer fees pursuant to the Reporting Person's election. The award provides that 100% of the RSUs will vest on the three-month anniversary of the Vesting Commencement Date of August 15, 2026, subject to the Reporting Person's continuous service relationship with the Issuer through the applicable vesting date. Each RSU represents a contingent right to receive one share of the Issuer's common stock. The Reporting Person shares pecuniary interest in these shares with other parties pursuant to contractual relationships. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest in these shares. Includes shares to be issued in connection with the vesting of one or more restricted stock units. The Reporting Person shares pecuniary interest in these shares with other parties pursuant to contractual relationships. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest in these shares. Shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025. Shares held by a trust of which the Reporting Person is a Trustee. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein. Shares held by a limited partnership of which the Reporting Person is a trustee of a trust which is the general partner. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein. Shares held by an irrevocable trust of which the Reporting Person is a Trustee. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein. /s/ Kanwalpreet S. Kalra, Attorney-in-Fact 2026-10-09