Astera Labs, Inc. (ALAB) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-21 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Astera Labs, Inc. (ALAB) CIK: 0001736297 --- Reporting Owner --- Name: Gajendra Sanjay CIK: 0001998179 Role: Director, Officer (President and COO) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-21 | Code: S (Open market sale) Shares: -136,709 | Price: $289.13 Total Value: $39,526,714.18 Shares Owned After: 5,327,504 | Ownership: I (Indirect) | Nature: By Trust 1 Footnotes: [F1] 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. [F2] The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $288.8000 to $289.7900, 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. [F3] These shares are owned directly by an estate planning trust ("Trust 1"), of which the Reporting Person is a trustee. 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. [Transaction #2] Security: Common Stock Date: 2026-05-21 | Code: S (Open market sale) Shares: -137,294 | Price: $290.21 Total Value: $39,843,419.00 Shares Owned After: 5,190,210 | Ownership: I (Indirect) | Nature: By Trust 1 Footnotes: [F1] 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. [F4] The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $289.8000 to $290.7800, 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. [F3] These shares are owned directly by an estate planning trust ("Trust 1"), of which the Reporting Person is a trustee. 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. [Transaction #3] Security: Common Stock Date: 2026-05-21 | Code: S (Open market sale) Shares: -73,300 | Price: $291.28 Total Value: $21,350,706.72 Shares Owned After: 5,116,910 | Ownership: I (Indirect) | Nature: By Trust 1 Footnotes: [F1] 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. [F5] The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $290.8000 to $291.7900, 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. [F3] These shares are owned directly by an estate planning trust ("Trust 1"), of which the Reporting Person is a trustee. 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. [Transaction #4] Security: Common Stock Date: 2026-05-21 | Code: S (Open market sale) Shares: -47,710 | Price: $292.14 Total Value: $13,937,789.48 Shares Owned After: 5,069,200 | Ownership: I (Indirect) | Nature: By Trust 1 Footnotes: [F1] 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. [F6] The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $291.8000 to $292.7900, 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. [F3] These shares are owned directly by an estate planning trust ("Trust 1"), of which the Reporting Person is a trustee. 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. [Transaction #5] Security: Common Stock Date: 2026-05-21 | Code: S (Open market sale) Shares: -4,987 | Price: $293.03 Total Value: $1,461,337.12 Shares Owned After: 5,064,213 | Ownership: I (Indirect) | Nature: By Trust 1 Footnotes: [F1] 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. [F7] The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $292.8400 to $293.5000, 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. [F3] These shares are owned directly by an estate planning trust ("Trust 1"), of which the Reporting Person is a trustee. 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. [Transaction #6] Security: Common Stock Date: 2026-05-22 | Code: G (Gift) Shares: +226,189 | Price: $0.00 Shares Owned After: 5,290,402 | Ownership: I (Indirect) | Nature: By Trust 1 Footnotes: [F8] On May 22, 2026, the Reporting Person transferred 226,189 shares of Issuer Common Stock to an estate planning trust ("Trust 1") for no consideration. [F3] These shares are owned directly by an estate planning trust ("Trust 1"), of which the Reporting Person is a trustee. 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. [Transaction #7] Security: Common Stock Date: 2026-05-22 | Code: G (Gift) Shares: -226,189 | Price: $0.00 Shares Owned After: 1,209,668 | Ownership: D (Direct) Footnotes: [F8] On May 22, 2026, the Reporting Person transferred 226,189 shares of Issuer Common Stock to an estate planning trust ("Trust 1") for no consideration. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) Footnotes: [F9] These shares are owned directly by an estate planning trust ("Trust 2"). 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. [Holding #2] Security: Common Stock Ownership: I (Indirect) Footnotes: [F10] These shares are owned directly by an estate planning trust ("Trust 3"). 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. --- Footnotes (Complete Index) --- F1: 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. F10: These shares are owned directly by an estate planning trust ("Trust 3"). 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. F2: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $288.8000 to $289.7900, 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. F3: These shares are owned directly by an estate planning trust ("Trust 1"), of which the Reporting Person is a trustee. 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. F4: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $289.8000 to $290.7800, 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. F5: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $290.8000 to $291.7900, 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. F6: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $291.8000 to $292.7900, 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. F7: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $292.8400 to $293.5000, 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. F8: On May 22, 2026, the Reporting Person transferred 226,189 shares of Issuer Common Stock to an estate planning trust ("Trust 1") for no consideration. F9: These shares are owned directly by an estate planning trust ("Trust 2"). 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. --- Signature --- /s/ /s/ Philip Mazzara, Attorney-in-Fact (2026-05-26)