Astera Labs trust plans $50.5M share sale

A Form 144 filing says the Mar 2011 Childrens Trust proposes selling up to 170,000 ALAB shares on Nasdaq via Morgan Stanley Smith Barney.

Rhea-AI Filing Summary

Astera Labs, Inc. (ALAB) is the issuer for which a Form 144 notice has been filed covering a proposed resale of restricted/controlled shares. The filing states that the Mar 2011 Childrens Trust intends to sell up to 170,000 shares of common stock of Astera Labs through Morgan Stanley Smith Barney LLC, with a reported value of $50,486,600, to be sold on NASDAQ. These shares were acquired on 03/21/2018 in a private acquisition from the issuer and were paid for in cash. The notice also lists Rule 10b5-1 plan sales during the past three months by related accounts, including sales of 170,000, 33,000, and 150,000 Astera Labs common shares on 07/01/2026.

Key Figures

Shares to be sold: 170,000 shares of common stock Reported value of shares to be sold: $50,486,600.00 Past 3 months 10b5-1 sale (Mar 2011 Childrens Trust): 170,000 shares; $75,457,826.00 +4 more

7 metrics

Shares to be sold 170,000 shares of common stock Planned sale by Mar 2011 Childrens Trust under Form 144

Reported value of shares to be sold $50,486,600.00 Value associated with 170,000 Astera Labs common shares to be sold

Past 3 months 10b5-1 sale (Mar 2011 Childrens Trust) 170,000 shares; $75,457,826.00 Sale of Astera Labs common stock on 07/01/2026

Past 3 months 10b5-1 sale (Casa Alameda 2007, LLC) 33,000 shares; $14,647,723.80 Sale of Astera Labs common stock on 07/01/2026

Past 3 months 10b5-1 sale (Alba 2003 Living Trust) 150,000 shares; $66,580,578.00 Sale of Astera Labs common stock on 07/01/2026

Planned sale date 09/01/2026 Date associated with the planned NASDAQ sale of 170,000 shares

Acquisition date of shares 03/21/2018 Date the 170,000 shares were acquired in a private transaction

Key Terms

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

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

"03/21/2018 | Private Acquisition from Issuer or an Affiliate | Issuer"

Form 144 regulatory

"144: Issuer Information Name of Issuer | Astera Labs, Inc."

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

FAQ

What does the Form 144 filing for ALAB disclose about planned share sales?

The Form 144 filing discloses that the Mar 2011 Childrens Trust plans to sell up to 170,000 shares of Astera Labs, Inc. common stock under Rule 144 through Morgan Stanley Smith Barney LLC, with a reported value of $50,486,600, to be sold on NASDAQ.

Who is the selling security holder in this Astera Labs (ALAB) Form 144?

The selling security holder is the Mar 2011 Childrens Trust. The trust is filing to sell Astera Labs, Inc. common shares for its account under Rule 144, with information aggregated as required for related persons and entities.

How many Astera Labs (ALAB) shares were previously sold under 10b5-1 plans?

The filing lists 10b5-1 plan sales on 07/01/2026 of 170,000 shares for the Mar 2011 Childrens Trust, 33,000 shares for Casa Alameda 2007, LLC, and 150,000 shares for the Alba 2003 Living Trust, all in Astera Labs common stock.

What was the reported value of the Astera Labs (ALAB) shares to be sold in this Form 144?

The Form 144 reports a value of $50,486,600 for the 170,000 Astera Labs common shares that the Mar 2011 Childrens Trust intends to sell through Morgan Stanley Smith Barney LLC on NASDAQ.

When and how did the selling trust acquire its Astera Labs (ALAB) shares?

The Form 144 states that the 170,000 shares of Astera Labs common stock were acquired on 03/21/2018 via a private acquisition from the issuer or an affiliate, and that the consideration paid for these shares was cash.

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

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Available on EDGAR 09/01/2026 - 05:02 PM Accepted by SEC EDGAR 09/01/2026 - 05:02 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	Mar 2011 Childrens Trust
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	170000	50486600.00	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	03/21/2018	Private Acquisition from Issuer or an Affiliate	Issuer			170000	03/21/2018	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)