Notice of Proposed Sale · 144

Astera Labs, Inc.

ALABNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Aug 6, 2026Accepted Aug 6, 2026, 12:41 PM EDTFiling CIK 1484394Accession 0001973251-26-000031

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: Astera Labs, Inc.
Issuer CIK: 0001736297
SEC file number: 001-41979
Phone: 408-242-7319
Person for whose account securities are to be sold: Dyckerhoff Stefan A
Relationships to issuer: Affiliate
Street: 2345 NORTH FIRST STREET
City: SAN JOSE
State / country code: CA
Postal code: 95131

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common	12,499	3,897,584.00	171,410,000	08/06/2026	NASDAQ	Stifel Nicolaus & Company Inc

Broker / market maker — proposed row 1, entry 1

Name: Stifel Nicolaus & Company Inc
Street: 501 N Broadway
City: St Louis
State / country code: MO
Postal code: 63102

Acquisition of securities to be sold

Acquisition of securities to be sold · 4 reported rows
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common	08/15/2024	Pro-rata distribution from Venture Fund	Sutter Hill Ventures A CA LP which acquired the shares from the Issuer in a private placement	2,919	N	11/23/2021	Cash
Common	08/29/2024	Pro-rata distribution from Venture Fund	Sutter Hill Ventures A CA LP which acquired the shares from the Issuer in a private placement	5,414	N	02/07/2020	Cash
Common	02/07/2020	Private Placement	Issuer	3,505	N	02/07/2020	Cash
Common	05/17/2022	Private Placement	Issuer	661	N	05/17/2022	Cash

Sales reported in the preceding three months

Sales reported in the preceding three months · 2 reported rows
Seller	Security	Sale date	Amount sold	Gross proceeds
Stefan A Dyckerhoff	Common	07/01/2026	12,499	5,624,555.00
Stefan A Dyckerhoff	Common	06/03/2026	12,499	4,553,995.00

Seller — prior-sale row 1, entry 1

Name: Stefan A Dyckerhoff
Street: 755 Page Mill Rd Ste A200
City: Palo Alto
State / country code: CA
Postal code: 94304

Seller — prior-sale row 2, entry 1

Name: Stefan A Dyckerhoff
Street: 755 Page Mill Rd Ste A200
City: Palo Alto
State / country code: CA
Postal code: 94304

Prior-sale reporting

Nothing to report for the preceding three months: N

Remarks

Of the shares covered by this Form 144: an aggregate of 8,333 shares were sold by a trust of which Mr. Dyckerhoff is a trustee; 3,505 shares were sold by an individual retirement account for Mr. Dyckerhoff; and 661 shares were sold by a limited partnership of which Mr. Dyckerhoff's trust is the trustee of a trust which is the general partner.

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