[Form 4] Astera Labs, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Astera Labs director Bethany Mayer executed multiple transactions on June 24-26, 2025, including both sales and transfers of common stock:

• Sold 686 shares on June 24 through a pre-planned Rule 10b5-1 trading plan at weighted average prices between $86.81-$88.50 per share
• Transferred 839 shares on June 26 to The Jantzen/Mayer Family 2002 Trust for no consideration

Following these transactions, Mayer directly owns 5,399 shares and indirectly owns 839 shares through the Trust. The sales were executed automatically under a Rule 10b5-1 plan established on November 25, 2024. As trustee of the Family Trust, Mayer disclaims beneficial ownership of the transferred shares except for any pecuniary interest.

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
Estimated average burden
hours per response:			0.5

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

X

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^*

Mayer Bethany

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
06/24/2025

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	06/24/2025		S(1)		261	D	$86.8098(2)	6,663	D
Common Stock	06/24/2025		S(1)		312	D	$87.6454(3)	6,351	D
Common Stock	06/24/2025		S(1)		113	D	$88.5011(4)	6,238	D
Common Stock	06/26/2025		G(5)		839	D	$0	5,399	D
Common Stock	06/26/2025		G(5)		839	A	$0	839	I	By Trust(6)

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. The sales reported in this Form 4 occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 25, 2024.

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $86.3300 to $87.2950, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

3. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $87.3550 to $88.0900, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $88.4600 to $88.5400, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

5. On June 26, 2025, the Reporting Person transferred 839 shares of Common Stock to The Jantzen/Mayer Family 2002 Trust (the "Trust") for no consideration.

6. These shares are owned directly by the Trust, of which the Reporting Person is a trustee. The Reporting Person disclaims beneficial ownership of these securities, except to the extent, if any, of her pecuniary interest therein, and the filing of this Form 4 is not an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

Remarks:

	/s/ Philip Mazzara, Attorney-in-Fact	06/26/2025
	** 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

How many ALAB shares did Director Bethany Mayer sell on June 24, 2025?

Director Bethany Mayer sold a total of 686 shares of ALAB common stock on June 24, 2025, in three separate transactions: 261 shares at an average price of $86.81, 312 shares at an average price of $87.65, and 113 shares at an average price of $88.50.

What was the price range of ALAB stock sales by Bethany Mayer on June 24, 2025?

The ALAB stock sales occurred across three price ranges: $86.33 to $87.29, $87.35 to $88.09, and $88.46 to $88.54, with weighted average prices of $86.81, $87.65, and $88.50 respectively.

Was ALAB Director Mayer's stock sale part of a pre-planned trading arrangement?

Yes, the sales were executed automatically pursuant to a Rule 10b5-1 trading plan that Director Bethany Mayer had previously adopted on November 25, 2024.

How many ALAB shares did Bethany Mayer transfer to trust ownership on June 26, 2025?

On June 26, 2025, Bethany Mayer transferred 839 shares of ALAB common stock to The Jantzen/Mayer Family 2002 Trust for no consideration, changing the ownership form from direct to indirect ownership through the trust.

How many ALAB shares does Bethany Mayer directly own after all reported transactions?

Following all reported transactions, Bethany Mayer directly owns 5,399 shares of ALAB common stock, with an additional 839 shares held indirectly through The Jantzen/Mayer Family 2002 Trust.