Astera Labs Form 144: RSU-linked Common Stock sale

Astera Labs, Inc. submitted a Form 144 notice reporting proposed sales of Common Stock tied to the vesting of restricted stock units on 02/15/2026.

Rhea-AI Filing Summary

Astera Labs, Inc. submitted a Form 144 notice reporting proposed sales of Common Stock tied to the vesting of restricted stock units on 02/15/2026.

The filing lists prior sales by Philip Mazzara: 4,620 shares on 11/17/2025 and 10,000 shares on 01/02/2026. The cover block shows 168,903,616 shares outstanding as of 02/17/2026.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Astera Labs' (ALAB) Form 144 report show?

It reports proposed sales of Common Stock tied to RSU vesting on 02/15/2026. The filing also lists prior sales by Philip Mazzara of 4,620 and 10,000 shares on 11/17/2025 and 01/02/2026, respectively.

Who is the seller named in the ALAB Form 144?

The filing identifies Philip Mazzara as a reported seller in recent transactions. It shows his sales of 4,620 shares on 11/17/2025 and 10,000 shares on 01/02/2026.

How many shares outstanding does Astera Labs disclose in this filing?

The cover information lists 168,903,616 shares outstanding as of 02/17/2026. This figure appears in the filing header and provides a baseline reference for outstanding common shares.

Are the Form 144 transactions completed or proposed for ALAB?

The Form 144 lists a proposed sale tied to RSU vesting on 02/15/2026, indicating an intended sale rather than a completed open-market transaction. Prior sales listed are recorded with their transaction dates.

Where were the prior sales by the reported seller executed?

The filing shows previous sales by Philip Mazzara with transaction dates and share counts but does not state execution venues. The record lists the transactions and amounts without specifying market or broker details.

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

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Accepted by SEC EDGAR 02/19/2026 - 08:50 PM EST 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	0001998163
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	408-242-7319
Name of Person for Whose Account the Securities are To Be Sold	Mazzara Philip
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	Officer

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 Stock	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza, 8th Floor New York NY 10004	4849	600327.63	168903616	02/17/2026	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 Stock	02/15/2026	Vesting of restricted stock units	Issuer			4849	02/15/2026	N/A

* 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
Philip Mazzara c/o Astera Labs, Inc. 2345 North First Street San Jose CA 95131	Common Stock	11/17/2025	4620	668476.66
Philip Mazzara c/o Astera Labs, Inc. 2345 North First Street San Jose CA 95131	Common Stock	01/02/2026	10000	1784071.23

144: Remarks and Signature

Remarks	Sale includes an amount necessary to satisfy tax withholding obligations in connection with the vesting and settlement of restricted stock units previously granted to Philip Mazzara.
Date of Notice	02/19/2026
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/ Philip Mazzara
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)