ALAB discloses proposed resale of common stock

ALAB submitted a Form 144 disclosure listing proposed resale of common stock and several previously issued restricted stock grants.

Rhea-AI Filing Summary

ALAB submitted a Form 144 disclosure listing proposed resale of common stock and several previously issued restricted stock grants. The filing shows two reported open-market dispositions by Philip Mazzara of 10,000 shares each on 03/02/2026 and 04/01/2026, with proceeds of $1,174,740.60 and $1,077,662.85, respectively. The excerpt also lists restricted stock issuances dated 08/15/2024, 11/15/2023, 02/15/2024, 08/15/2023, and 05/15/2024 with individual share counts shown.

Insights

Securities Counsel

Form 144 shows proposed resales and recent dispositions by an affiliate.

Rule 144 disclosures permit affiliates to report intended resale methods; the excerpt lists specific restricted stock grants with dates and quantities and two past dispositions by Philip Mazzara on 03/02/2026 and 04/01/2026

Cashflow treatment for future sales is not detailed in the excerpt; subsequent filings or broker disclosures may provide consummation details.

Key Figures

Disposition by Philip Mazzara: 10,000 shares Disposition by Philip Mazzara: 10,000 shares Proceeds from 03/02/2026 sale: $1,174,740.60 +4 more

7 metrics

Disposition by Philip Mazzara 10,000 shares sold on <date>03/02/2026</date>

Disposition by Philip Mazzara 10,000 shares sold on <date>04/01/2026</date>

Proceeds from 03/02/2026 sale $1,174,740.60 03/02/2026 disposition

Proceeds from 04/01/2026 sale $1,077,662.85 04/01/2026 disposition

Restricted stock grant 854 shares grant dated <date>08/15/2024</date>

Restricted stock grant 1,226 shares grant dated <date>11/15/2023</date>

Restricted stock grant 5,017 shares grant dated <date>08/15/2023</date>

Key Terms

Rule 144, Restricted Stock, Proceeds

3 terms

Rule 144 regulatory

"144: Securities To Be Sold"

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.

Restricted Stock financial

"Common | 08/15/2024 | Restricted Stock"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Proceeds financial

"10000 | 1077662.85"

FAQ

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

What does the ALAB Form 144 disclose about recent insider sales?

The filing lists two reported dispositions by Philip Mazzara: 10,000 shares sold on 03/02/2026 and 10,000 shares sold on 04/01/2026, with proceeds of $1,174,740.60 and $1,077,662.85, respectively.

Does ALAB's excerpt show restricted stock grants and their quantities?

Yes. The excerpt lists restricted stock entries dated 08/15/2024 (854 shares), 11/15/2023 (1,226 shares), 02/15/2024 (1,226 shares), 08/15/2023 (5,017 shares), and 05/15/2024 (881 shares), each labeled as restricted stock.

Who is listed as the seller in the Form 144 excerpt for ALAB?

The excerpt names Philip Mazzara with an address in San Jose, CA, as reporting dispositions of common stock on 03/02/2026 and 04/01/2026, each for 10,000 shares.

Is the trading venue for ALAB securities shown in the excerpt?

Yes. The excerpt includes a reference to NASDAQ alongside a date 05/18/2026, indicating the securities are listed on that exchange in the provided lines of the filing.

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

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Accepted by SEC EDGAR 05/18/2026 - 04:58 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	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) 766-3806
Name of Person for Whose Account the Securities are To Be Sold	PHILIP MAZZARA
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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	9204	2166253.44	171407939	05/18/2026	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	08/15/2024	Restricted Stock	Issuer			854	08/15/2024	Not Applicable
Common	11/15/2023	Restricted Stock	Issuer			1226	11/15/2023	Not Applicable
Common	02/15/2024	Restricted Stock	Issuer			1226	02/15/2024	Not Applicable
Common	08/15/2023	Restricted Stock	Issuer			5017	08/15/2023	Not Applicable
Common	05/15/2024	Restricted Stock	Issuer			881	05/15/2024	Not Applicable

* 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 2345 North First Street San Jose CA 95131	common	04/01/2026	10000	1077662.85
PHILIP MAZZARA 2345 North First Street San Jose CA 95131	common	03/02/2026	10000	1174740.60

144: Remarks and Signature

Remarks
Date of Notice	05/18/2026
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)