ALAB Form 4: General Counsel now holds 151,660 shares

Rhea-AI Filing Summary

Astera Labs, Inc. (ALAB) reported an insider share purchase by its General Counsel and Secretary. On 11/14/2025, the officer acquired 87 shares of common stock at a price of $78.3615 per share. These shares were bought through the company’s 2024 Employee Stock Purchase Plan in transactions described as exempt under Rule 16b-3(d) and Rule 16b-3(c). Following this transaction, the officer now beneficially owns 151,660 shares of Astera Labs common stock in direct ownership.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mazzara Philip

(Last) (First) (Middle)

C/O ASTERA LABS, INC.

2345 NORTH FIRST STREET

(Street)

SAN JOSE CA 95131

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Astera Labs, Inc. [ ALAB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Counsel and Secretary

3. Date of Earliest Transaction (Month/Day/Year)
11/14/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/14/2025		A(1)	V	87	A	$78.3615	151,660	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These shares were acquired under the Astera Labs, Inc. 2024 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).

Remarks:

	/s/ Philip Mazzara	11/18/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Astera Labs (ALAB) report in this Form 4?

The filing reports that an Astera Labs officer, serving as General Counsel and Secretary, acquired 87 shares of common stock on 11/14/2025 through the company’s 2024 Employee Stock Purchase Plan.

At what price were the 87 Astera Labs (ALAB) shares purchased?

The 87 shares of Astera Labs common stock were purchased at a price of $78.3615 per share.

How many Astera Labs (ALAB) shares does the reporting person own after the transaction?

After the reported purchase, the officer beneficially owns 151,660 shares of Astera Labs common stock, held with direct ownership status.

What plan was used for the insider share purchase at Astera Labs (ALAB)?

The shares were acquired under the Astera Labs, Inc. 2024 Employee Stock Purchase Plan, which allowed the officer to buy company stock through a structured purchase program.

Was the Astera Labs (ALAB) insider transaction exempt under SEC rules?

Yes. The filing states that the shares were acquired in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c), which relate to certain insider transactions under approved plans.

Is this Astera Labs (ALAB) Form 4 filed by a single reporting person?

Yes. The Form 4 indicates that it is a Form filed by One Reporting Person, covering this single officer’s ownership change.