Jack R. Lazar - 04 Jun 2026 Form 4 Insider Report for Astera Labs, Inc. (ALAB)

Reporting relationship: Director
Issuer ticker: ALAB
Reported as of: 04 Jun 2026
Net transaction value: -$3,551,679
SEC form: 4
Accepted by SEC: 08 Jun 2026, 20:26:47 UTC
Prior SEC filing: 05 Jun 2026
Next SEC filing: 29 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Philip Mazzara, Attorney-in-Fact

Key filing fact

Jack R. Lazar filed Form 4 for Astera Labs, Inc. (ALAB) on 08 Jun 2026.

Key facts

This page summarizes Jack R. Lazar's Form 4 filing for Astera Labs, Inc. (ALAB).
19 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 08 Jun 2026, 20:26.

Change

Previous filing in this sequence was filed on 05 Jun 2026.
Current net transaction value: -$3,551,679.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001277624 Primary reporting owner

LAZAR JACK R

Relationship: Director
Address: C/O ASTERA LABS, INC., 2345 NORTH FIRST STREET, SAN JOSE
Signature: /s/ Philip Mazzara, Attorney-in-Fact
Signature date: 08 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ALAB transaction

Common Stock

Award

Transaction value
Shares: +837
Change %: +0.99%
Price: $0.000000^*
Shares after: 85,688
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F1, F2

ALAB transaction

Common Stock

Sale

Transaction value: $318,937
Shares: -879
Change %: -1%
Price: $362.84
Shares after: 84,809
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F4

ALAB transaction

Common Stock

Sale

Transaction value: $308,385
Shares: -854
Change %: -1%
Price: $361.11
Shares after: 83,955
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F5

ALAB transaction

Common Stock

Sale

Transaction value: $401,858
Shares: -1,116
Change %: -1.3%
Price: $360.09
Shares after: 82,839
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F6

ALAB transaction

Common Stock

Sale

Transaction value: $315,130
Shares: -877
Change %: -1.1%
Price: $359.33
Shares after: 81,962
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F7

ALAB transaction

Common Stock

Sale

Transaction value: $316,234
Shares: -883
Change %: -1.1%
Price: $358.14
Shares after: 81,079
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F8

ALAB transaction

Common Stock

Sale

Transaction value: $202,030
Shares: -566
Change %: -0.7%
Price: $356.94
Shares after: 80,513
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F9

ALAB transaction

Common Stock

Sale

Transaction value: $335,950
Shares: -946
Change %: -1.2%
Price: $355.13
Shares after: 79,567
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F10

ALAB transaction

Common Stock

Sale

Transaction value: $132,185
Shares: -373
Change %: -0.47%
Price: $354.38
Shares after: 79,194
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F11

ALAB transaction

Common Stock

Sale

Transaction value: $388,616
Shares: -1,101
Change %: -1.4%
Price: $352.97
Shares after: 78,093
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F12

ALAB transaction

Common Stock

Sale

Transaction value: $111,847
Shares: -318
Change %: -0.41%
Price: $351.72
Shares after: 77,775
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F13

ALAB transaction

Common Stock

Sale

Transaction value: $5,969
Shares: -17
Change %: -0.02%
Price: $351.13
Shares after: 77,758
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3

ALAB transaction

Common Stock

Sale

Transaction value: $148,031
Shares: -423
Change %: -0.54%
Price: $349.96
Shares after: 77,335
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F14

ALAB transaction

Common Stock

Sale

Transaction value: $67,133
Shares: -193
Change %: -0.25%
Price: $347.84
Shares after: 77,142
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F15

ALAB transaction

Common Stock

Sale

Transaction value: $82,413
Shares: -238
Change %: -0.31%
Price: $346.27
Shares after: 76,904
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F16

ALAB transaction

Common Stock

Sale

Transaction value: $84,928
Shares: -246
Change %: -0.32%
Price: $345.24
Shares after: 76,658
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F17

ALAB transaction

Common Stock

Sale

Transaction value: $83,599
Shares: -243
Change %: -0.32%
Price: $344.03
Shares after: 76,415
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F2, F3, F18

ALAB transaction

Common Stock

Sale

Transaction value: $180,521
Shares: -527
Change %: -0.69%
Price: $342.55
Shares after: 75,888
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F3, F19

ALAB transaction

Common Stock

Sale

Transaction value: $67,912
Shares: -200
Change %: -0.26%
Price: $339.56
Shares after: 75,688
Date: 04 Jun 2026
Ownership: Direct
Footnotes: F3, F19

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 19 footnotes

Footnote F1

These shares represent an award of restricted stock units ("RSUs") granted on June 4, 2026 (the "Grant Date") under the Astera Labs, Inc. 2024 Stock Option and Incentive Plan. Such award vests in full upon the earlier of (i) the first anniversary of the Grant Date or (ii) the date of the next annual stockholder meeting of the Company following the Grant Date, subject to the Reporting Person's continuous service relationship with the Issuer through each applicable vesting date. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock.

Footnote F2

Includes deferred stock units and dividend equivalent units.

Footnote F3

The sales reported in this Form 4 occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 2, 2025.

Footnote F4

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $362.5300 to $363.4350, 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.

Footnote F5

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $360.8100 to $361.6600, 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.

Footnote F6

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $359.7450 to $360.6600, 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.

Footnote F7

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $358.8000 to $359.6400, 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.

Footnote F8

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $357.8650 to $358.6000, 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.

Footnote F9

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $356.6600 to $357.5750, 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.

Footnote F10

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $354.6200 to $355.5800, 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.

Footnote F11

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $354.0600 to $354.5500, 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.

Footnote F12

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $352.5400 to $353.5200, 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.

Footnote F13

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $351.5250 to $352.4850, 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.

Footnote F14

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $349.1050 to $350.0100, 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.

Footnote F15

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $347.7700 to $347.8600, 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.

Footnote F16

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $346.2700 to $346.6650, 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.

Footnote F17

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $344.6650 to $345.6250, 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.

Footnote F18

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $343.9250 to $344.6200, 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.

Footnote F19

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $342.5200 to $343.4600, 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.