Astera Labs holder plans $9.8M share sale

Rhea-AI Filing Summary

Astera Labs, Inc. (ALAB) has a beneficial holder, Casa Alameda 2007, LLC, that submitted a notice under Rule 144 covering a potential sale of up to 33,000 shares of common stock through Morgan Stanley Smith Barney LLC, with an indicated aggregate market value of $9,800,340 and a proposed sale date of September 1, 2026 on Nasdaq.

The 33,000 shares were originally acquired on November 30, 2018 in a private acquisition from the issuer or an affiliate for cash. The notice also lists prior Rule 10b5-1 plan sales during the past three months by related trusts and entities holding Astera Labs common stock.

Key Figures

Shares to be sold under Rule 144: 33,000 shares of common stock Aggregate market value of planned sale: $9,800,340.00 Acquisition date of shares to be sold: November 30, 2018 +3 more

6 metrics

Shares to be sold under Rule 144 33,000 shares of common stock Maximum amount covered by the notice for Casa Alameda 2007, LLC

Aggregate market value of planned sale $9,800,340.00 Indicated for the 33,000 Astera Labs common shares proposed to be sold on Nasdaq

Acquisition date of shares to be sold November 30, 2018 Date the 33,000 shares were acquired via private acquisition from issuer or affiliate for cash

Past 3 months 10b5-1 sale by MAR 2011 CHILDRENS TRUST 170,000 shares; $75,457,826.00 Astera Labs common stock sold on July 1, 2026 under a 10b5-1 plan

Past 3 months 10b5-1 sale by CASA ALAMEDA 2007, LLC 33,000 shares; $14,647,723.80 Astera Labs common stock sold on July 1, 2026 under a 10b5-1 plan

Past 3 months 10b5-1 sale by ALBA 2003 LIVING TRUST 150,000 shares; $66,580,578.00 Astera Labs common stock sold on July 1, 2026 under a 10b5-1 plan

Key Terms

Rule 144, 10b5-1, Private Acquisition from Issuer or an Affiliate, Common

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.

10b5-1 regulatory

"10b5-1 Sales for MAR 2011 CHILDRENS TRUST U/A DTD06/01/2011"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Private Acquisition from Issuer or an Affiliate financial

"Private Acquisition from Issuer or an Affiliate | Issuer | | | 33000"

Common financial

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services"

FAQ

What Rule 144 sale is being planned for Astera Labs, Inc. (ALAB)?

A beneficial holder, Casa Alameda 2007, LLC, has given notice under Rule 144 for a potential sale of up to 33,000 shares of Astera Labs common stock, to be sold through Morgan Stanley Smith Barney LLC, with an indicated aggregate market value of $9,800,340.

Who is the broker for the planned Rule 144 sale of ALAB shares?

The planned Rule 144 sale of up to 33,000 ALAB common shares for Casa Alameda 2007, LLC is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services, listed at 1 New York Plaza, New York, NY.

When were the ALAB shares to be sold by Casa Alameda 2007, LLC originally acquired?

The 33,000 Astera Labs common shares covered by the Rule 144 notice for Casa Alameda 2007, LLC were originally acquired on November 30, 2018 in a private acquisition from the issuer or an affiliate for cash.

What recent 10b5-1 sales of ALAB stock are disclosed?

Recent 10b5-1 plan sales on July 1, 2026 include: 170,000 shares sold for $75,457,826 by MAR 2011 CHILDRENS TRUST, 33,000 shares sold for $14,647,723.80 by CASA ALAMEDA 2007, LLC, and 150,000 shares sold for $66,580,578 by ALBA 2003 LIVING TRUST.

What is the proposed date and market for the ALAB Rule 144 sale?

The notice describes a proposed sale date of September 1, 2026 for up to 33,000 shares of Astera Labs common stock, to be sold on the Nasdaq market.

Who signed the Rule 144 notice related to Astera Labs (ALAB)?

The notice related to Astera Labs common stock was signed by /s/ Manuel Alba, with signature dated September 1, 2026, and includes the standard warning that intentional misstatements or omissions of facts constitute federal criminal violations under 18 U.S.C. 1001.

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

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Available on EDGAR 09/01/2026 - 04:37 PM Accepted by SEC EDGAR 09/01/2026 - 04:36 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	0001134727
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	4087663806
Name of Person for Whose Account the Securities are To Be Sold	Casa Alameda 2007, LLC
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	Director

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	33000	9800340.00	173485104	09/01/2026	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	11/30/2018	Private Acquisition from Issuer or an Affiliate	Issuer			33000	11/30/2018	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
10b5-1 Sales for MAR 2011 CHILDRENS TRUST U/A DTD06/01/2011 2345 North First Street San Jose CA 95131	Common	07/01/2026	170000	75457826.00
10b5-1 Sales for CASA ALAMEDA 2007, LLC 2345 North First Street San Jose CA 95131	Common	07/01/2026	33000	14647723.80
10b5-1 Sales for ALBA 2003 LIVING TRUST U/A DTD 07/29/2003 2345 North First Street San Jose CA 95131	Common	07/01/2026	150000	66580578.00

144: Remarks and Signature

Remarks
Date of Notice	09/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/22/2026
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	/s/ Manuel Alba
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)