# EDGAR Filing Document

**Accession Number:** 0001277624
**File Stem:** 0001277624-26-000015
**Filing Date:** 2026-6
**Character Count:** 15762
**Document Hash:** 5c4a3e1ebc015bdefeb99b30b558ef22
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001277624-26-000015.hdr.sgml**: 20260608

**ACCESSION NUMBER**: 0001277624-26-000015

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260604

**FILED AS OF DATE**: 20260608

**DATE AS OF CHANGE**: 20260608

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LAZAR JACK R
- **CENTRAL INDEX KEY:** 0001277624

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41979
- **FILM NUMBER:** 261074258

**MAIL ADDRESS:**
- **STREET 1:** 400 W. CESAR CHAVEZ
- **STREET 2:** ATTN: STOCK ADMINISTRATION
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78701
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Astera Labs, Inc.
- **CENTRAL INDEX KEY:** 0001736297
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 823437062
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 2345 NORTH FIRST STREET
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95131
- **BUSINESS PHONE:** 408-242-7319

**MAIL ADDRESS:**
- **STREET 1:** 2345 NORTH FIRST STREET
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95131

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>LAZAR JACK R<br><sub>(Last) (First) (Middle)</sub><br>C/O ASTERA LABS, INC.<br>2345 NORTH FIRST STREET<br><sub>(Street)</sub><br>SAN JOSE, CA 95131<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-04 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Astera Labs, Inc. [ ALAB ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2026-06-04 |  | A |  | 837<sup>(1)</sup> | A | $0 | 85688<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 879 | D | 362.8405<sup>(4)</sup> | 84809<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 854 | D | 361.1061<sup>(5)</sup> | 83955<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 1116 | D | 360.0879<sup>(6)</sup> | 82839<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 877 | D | 359.3267<sup>(7)</sup> | 81962<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 883 | D | 358.136<sup>(8)</sup> | 81079<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 566 | D | 356.9442<sup>(9)</sup> | 80513<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 946 | D | 355.1273<sup>(10)</sup> | 79567<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 373 | D | 354.3839<sup>(11)</sup> | 79194<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 1101 | D | 352.9665<sup>(12)</sup> | 78093<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 318 | D | 351.7187<sup>(13)</sup> | 77775<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 17 | D | $351.13 | 77758<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 423 | D | 349.9557<sup>(14)</sup> | 77335<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 193 | D | 347.8389<sup>(15)</sup> | 77142<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 238 | D | 346.2717<sup>(16)</sup> | 76904<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 246 | D | 345.2366<sup>(17)</sup> | 76658<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 243 | D | 344.0294<sup>(18)</sup> | 76415<sup>(2)</sup> | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 527 | D | 342.5453<sup>(19)</sup> | 75888 | D |  |
| Common Stock | 2026-06-04 |  | S<sup>(3)</sup> |  | 200 | D | 339.56<sup>(19)</sup> | 75688 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) 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.

(2) Includes deferred stock units and dividend equivalent units.

(3) 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.

(4) 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.

(5) 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.

(6) 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.

(7) 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.

(8) 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.

(9) 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.

(10) 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.

(11) 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.

(12) 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.

(13) 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.

(14) 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.

(15) 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.

(16) 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.

(17) 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.

(18) 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.

(19) 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.

**Signature:** /s/ Philip Mazzara, Attorney-in-Fact  
**Date:** 2026-06-08

### Remarks:

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.**