Manuel Alba - 01 Apr 2026 Form 4 Insider Report for Astera Labs, Inc. (ALAB)

Reporting relationship: Director
Issuer ticker: ALAB
Reported as of: 01 Apr 2026
Net transaction value: -$19,693,397
SEC form: 4
Accepted by SEC: 03 Apr 2026, 18:32:33 UTC
Prior SEC filing: 03 Dec 2025
Next SEC filing: 06 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Philip Mazzara, Attorney-in-Fact

Key filing fact

Manuel Alba filed Form 4 for Astera Labs, Inc. (ALAB) on 03 Apr 2026.

Key facts

This page summarizes Manuel Alba's Form 4 filing for Astera Labs, Inc. (ALAB).
7 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 03 Apr 2026, 18:32.

Change

Previous filing in this sequence was filed on 03 Dec 2025.
Current net transaction value: -$19,693,397.

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 0001134727 Primary reporting owner

ALBA MANUEL

Relationship: Director
Address: C/O ASTERA LABS, INC., 2345 NORTH FIRST STREET, SAN JOSE
Signature: /s/ Philip Mazzara, Attorney-in-Fact
Signature date: 03 Apr 2026

Reported non-derivative transactions

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

ALAB transaction

Common Stock

Sale

Transaction value: $6,060,312
Shares: -57,001
Change %: -3.6%
Price: $106.32
Shares after: 1,517,497
Date: 01 Apr 2026
Ownership: By Alba Trust
Footnotes: F1, F2, F3

ALAB transaction

Common Stock

Sale

Transaction value: $2,612,723
Shares: -24,317
Change %: -1.6%
Price: $107.44
Shares after: 1,493,180
Date: 01 Apr 2026
Ownership: By Alba Trust
Footnotes: F1, F3, F4

ALAB transaction

Common Stock

Sale

Transaction value: $4,947,324
Shares: -45,668
Change %: -3.1%
Price: $108.33
Shares after: 1,447,512
Date: 01 Apr 2026
Ownership: By Alba Trust
Footnotes: F1, F3, F5

ALAB transaction

Common Stock

Sale

Transaction value: $1,676,581
Shares: -15,367
Change %: -1.1%
Price: $109.10
Shares after: 1,432,145
Date: 01 Apr 2026
Ownership: By Alba Trust
Footnotes: F1, F3, F6

ALAB transaction

Common Stock

Sale

Transaction value: $557,669
Shares: -5,060
Change %: -0.35%
Price: $110.21
Shares after: 1,427,085
Date: 01 Apr 2026
Ownership: By Alba Trust
Footnotes: F1, F3, F7

ALAB transaction

Common Stock

Sale

Transaction value: $287,522
Shares: -2,587
Change %: -0.18%
Price: $111.14
Shares after: 1,424,498
Date: 01 Apr 2026
Ownership: By Alba Trust
Footnotes: F1, F3, F8

ALAB transaction

Common Stock

Sale

Transaction value: $3,551,265
Shares: -33,000
Change %: -9.4%
Price: $107.61
Shares after: 319,863
Date: 01 Apr 2026
Ownership: By Casa Alameda 2007, LLC
Footnotes: F1, F9, F10

ALAB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,000
Date: 01 Apr 2026
Ownership: By spouse

ALAB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,351
Date: 01 Apr 2026
Ownership: Direct

^* 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 10 footnotes

Footnote F1

The sales reported in this Form 4 occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 29, 2025.

Footnote F2

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $105.8500 to $106.8400, 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 F3

These shares are owned directly by Manuel Alba-Marquez in trust for Alba 2003 Living Trust (the "Alba Trust"), of which the Reporting Person and his spouse are co-trustees. The Reporting Person disclaims beneficial ownership of these securities, except to the extent, if any, of his 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.

Footnote F4

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $106.8500 to $107.8400, 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 $107.8500 to $108.8400, 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 $108.8500 to $109.8400, 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 $109.8500 to $110.8300, 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 $110.8500 to $111.2700, 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 $107.6124 to $107.6148, 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

These shares are owned directly by Casa Alameda 2007, LLC, of which the Reporting Person is a manager. The Reporting Person disclaims beneficial ownership of these securities, except to the extent, if any, of his 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.