Astera Labs affiliate plans $3.4M stock sale

Affiliate Stefan A. Dyckerhoff has filed to sell 12,499 Astera Labs common shares under Rule 144, following two similar-sized sales earlier in the prior three months.

Rhea-AI Filing Summary

Astera Labs, Inc. (ALAB) received a notice that affiliate Stefan A. Dyckerhoff intends to sell up to 12,499 shares of common stock through Stifel Nicolaus & Company on NASDAQ, with an estimated aggregate market value of $3,436,755.00 as of the planned sale date of September 2, 2026. The notice states that 171,410,000 shares of common stock were outstanding. In the past three months, Dyckerhoff reported sales of 12,499 shares on July 1, 2026 and 12,499 shares on August 6, 2026.

Key Figures

Shares proposed to be sold: 12,499 shares Aggregate market value of proposed sale: $3,436,755.00 Shares outstanding: 171,410,000 shares +3 more

6 metrics

Shares proposed to be sold 12,499 shares Common stock subject to the Form 144 notice

Aggregate market value of proposed sale $3,436,755.00 Estimated value of 12,499 shares as of planned sale date September 2, 2026

Shares outstanding 171,410,000 shares Astera Labs common stock reported as outstanding

Prior sale on July 1, 2026 12,499 shares for $5,624,555.00 Common stock sold by Stefan Dyckerhoff during past three months

Prior sale on August 6, 2026 12,499 shares for $3,897,584.00 Common stock sold by Stefan Dyckerhoff during past three months

Pro-rata distribution received 8,333 shares Distribution from Sutter Hill Ventures A CA LP on August 29, 2024

Key Terms

Rule 144, Affiliate, pro-rata distribution, Private Placement

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Affiliate regulatory

"Affiliate 144: Securities Information"

pro-rata distribution financial

"Common | 08/29/2024 | Pro-rata distribution from Venture fund"

A pro-rata distribution is when cash, shares, rights or other assets are divided among investors in proportion to their ownership stake, so each holder gets the same percentage of the total as their share of the company. Think of slicing a pie so everyone receives pieces sized to match how much of the pie they own. For investors this matters because it preserves relative ownership and determines how much value or new securities they receive, and whether they need to buy or sell to maintain their position.

Private Placement financial

"Common | 11/08/2019 | Private Placement | Issuer"

A private placement is a sale of securities directly to a selected group of investors, typically institutions or accredited investors, instead of through a public offering. It lets a company raise money faster and with fewer regulatory steps; for existing shareholders it matters because the newly issued shares, often sold at a discount, increase the share count and can dilute their ownership.

FAQ

What does the Form 144 filing for ALAB disclose?

It discloses that affiliate Stefan A. Dyckerhoff has notified of a proposed sale of 12,499 Astera Labs common shares under Rule 144, to be effected through Stifel Nicolaus & Company on NASDAQ.

How many Astera Labs (ALAB) shares are proposed to be sold?

The notice covers a proposed sale of 12,499 shares of Astera Labs common stock, with an estimated aggregate market value of $3,436,755.00 as of the planned sale date of September 2, 2026.

How many Astera Labs (ALAB) shares were outstanding?

The filing reports that 171,410,000 shares of Astera Labs common stock were outstanding, providing context for the size of the proposed 12,499-share sale.

What Astera Labs (ALAB) share sales occurred in the last three months?

Within the last three months, Stefan Dyckerhoff reported two sales: 12,499 shares on July 1, 2026 for $5,624,555.00, and 12,499 shares on August 6, 2026 for $3,897,584.00.

How were the Astera Labs (ALAB) shares originally acquired?

The filing shows acquisitions via private placements from the issuer on November 8, 2019, February 7, 2020, and May 17, 2022, plus an 8,333-share pro-rata distribution from Sutter Hill Ventures A CA LP on August 29, 2024.

How are the covered Astera Labs (ALAB) shares held?

A remark states that, of the shares covered, 8,333 shares were sold by a trust where Mr. Dyckerhoff is trustee, 3,505 shares by an individual retirement account for him, and 661 shares by a limited partnership related to his trust.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/02/2026 - 03:29 PM Accepted by SEC EDGAR 09/02/2026 - 03:28 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001484394
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Astera Labs, Inc.
SEC File Number	001-41979
Address of Issuer	2345 NORTH FIRST STREET SAN JOSE CALIFORNIA 95131
Phone	408-766-3806
Name of Person for Whose Account the Securities are To Be Sold	Dyckerhoff Stefan A
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Affiliate

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Stifel Nicolaus & Company Inc 501 N Broadway St Louis MO 63102	12499	3436755.00	171410000	09/02/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/29/2024	Pro-rata distribution from Venture fund	Sutter Hill Ventures A CA LP via the Issuer via Private Placement			8333	02/07/2020	Cash
Common	02/07/2020	Private Placement	Issuer			603	02/07/2020	Cash
Common	11/08/2019	Private Placement	Issuer			2902	11/08/2019	Cash
Common	05/17/2022	Private Placement	Issuer			661	05/17/2022	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Stefan Dyckerhoff 755 Page Mill Rd Ste A200 Palo Alto CA 94304	Common	07/01/2026	12499	5624555.00
Stefan Dyckerhoff 755 Page Mill Rd Ste A200 Palo Alto CA 94304	Common	08/06/2026	12499	3897584.00

144: Remarks and Signature

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.
Date of Notice	09/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/01/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Kanwalpreet S Kalra under POA
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)