# EDGAR Filing Document

**Accession Number:** 0001134727
**File Stem:** 0001736297-25-000129
**Filing Date:** 2025-9
**Character Count:** 17096
**Document Hash:** 88dc6e324b3cda7297b18203299317ec
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001736297-25-000129.hdr.sgml**: 20250904

**ACCESSION NUMBER**: 0001736297-25-000129

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250902

**FILED AS OF DATE**: 20250904

**DATE AS OF CHANGE**: 20250904

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** ALBA MANUEL
- **CENTRAL INDEX KEY:** 0001134727

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41979
- **FILM NUMBER:** 251294673

**MAIL ADDRESS:**
- **STREET 1:** 1830 THE ALAMEDA
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95126
**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>ALBA MANUEL<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>2025-09-02 | **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 | 2025-09-02 |  | S<sup>(1)</sup> |  | 6717 | D | 168.2316<sup>(2)</sup> | 1867781 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 10586 | D | 168.9591<sup>(4)</sup> | 1857195 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 10108 | D | 170.1033<sup>(5)</sup> | 1847087 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 11646 | D | 171.1597<sup>(6)</sup> | 1835441 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 17373 | D | 172.0574<sup>(7)</sup> | 1818068 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 22459 | D | 173.1229<sup>(8)</sup> | 1795609 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 36288 | D | 174.018<sup>(9)</sup> | 1759321 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 4006 | D | 175.0424<sup>(10)</sup> | 1755315 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 9622 | D | 176.2324<sup>(11)</sup> | 1745693 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 13475 | D | 177.0325<sup>(12)</sup> | 1732218 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 1870 | D | 178.2163<sup>(13)</sup> | 1730348 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 3262 | D | 179.2464<sup>(14)</sup> | 1727086 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 2588 | D | 180.0993<sup>(15)</sup> | 1724498 | I | By Alba Trust<sup>(3)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 1478 | D | 168.2315<sup>(2)</sup> | 417385 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 2329 | D | 168.9591<sup>(4)</sup> | 415056 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 2224 | D | 170.1033<sup>(5)</sup> | 412832 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 2562 | D | 171.1598<sup>(6)</sup> | 410270 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 3822 | D | 172.0574<sup>(7)</sup> | 406448 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 4941 | D | 173.1229<sup>(8)</sup> | 401507 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 7983 | D | 174.018<sup>(9)</sup> | 393524 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 882 | D | 175.0423<sup>(17)</sup> | 392642 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 2116 | D | 176.2325<sup>(11)</sup> | 390526 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 2965 | D | 177.0325<sup>(12)</sup> | 387561 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 411 | D | 178.2159<sup>(18)</sup> | 387150 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 718 | D | 179.2462<sup>(14)</sup> | 386432 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock | 2025-09-02 |  | S<sup>(1)</sup> |  | 569 | D | 180.0988<sup>(15)</sup> | 385863 | I | By Casa Alameda 2007, LLC<sup>(16)</sup> |
| Common Stock |  |  |  |  |  |  |  | 5000 | I | By spouse |
| Common Stock |  |  |  |  |  |  |  | 2351 | 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) 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.

(2) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $167.5900 to $168.5800, 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.

(3) 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.

(4) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $168.5900 to $169.5800, 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.

(5) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $169.5900 to $170.5800, 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.

(6) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $170.5900 to $171.5800, 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.

(7) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $171.5900 to $172.5800, 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.

(8) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $172.5900 to $173.5800, 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.

(9) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $173.5900 to $174.5700, 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 $174.6000 to $175.5800, 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 $175.6100 to $176.5900, 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 $176.6000 to $177.5800, 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.

(13) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $177.7100 to $178.6900, 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 $178.7600 to $179.7400, 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 $179.7800 to $180.5300, 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) 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.

(17) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $174.6000 to $175.5700, 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 $177.7100 to $178.6700, 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:** 2025-09-04

### 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.**