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: 2026-06-04 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Astera Labs, Inc. (ALAB) CIK: 0001736297 --- Reporting Owner --- Name: LAZAR JACK R CIK: 0001277624 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-06-04 | Code: A (Grant or award) Shares: +837 | Price: $0.00 Shares Owned After: 85,688 | Ownership: D (Direct) Footnotes: [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #2] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -879 | Price: $362.84 Total Value: $318,936.80 Shares Owned After: 84,809 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #3] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -854 | Price: $361.11 Total Value: $308,384.61 Shares Owned After: 83,955 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #4] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -1,116 | Price: $360.09 Total Value: $401,858.10 Shares Owned After: 82,839 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #5] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -877 | Price: $359.33 Total Value: $315,129.52 Shares Owned After: 81,962 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #6] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -883 | Price: $358.14 Total Value: $316,234.09 Shares Owned After: 81,079 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #7] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -566 | Price: $356.94 Total Value: $202,030.42 Shares Owned After: 80,513 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #8] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -946 | Price: $355.13 Total Value: $335,950.43 Shares Owned After: 79,567 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #9] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -373 | Price: $354.38 Total Value: $132,185.19 Shares Owned After: 79,194 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #10] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -1,101 | Price: $352.97 Total Value: $388,616.12 Shares Owned After: 78,093 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #11] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -318 | Price: $351.72 Total Value: $111,846.55 Shares Owned After: 77,775 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #12] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -17 | Price: $351.13 Total Value: $5,969.21 Shares Owned After: 77,758 | Ownership: D (Direct) Footnotes: [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #13] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -423 | Price: $349.96 Total Value: $148,031.26 Shares Owned After: 77,335 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #14] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -193 | Price: $347.84 Total Value: $67,132.91 Shares Owned After: 77,142 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #15] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -238 | Price: $346.27 Total Value: $82,412.66 Shares Owned After: 76,904 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #16] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -246 | Price: $345.24 Total Value: $84,928.20 Shares Owned After: 76,658 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #17] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -243 | Price: $344.03 Total Value: $83,599.14 Shares Owned After: 76,415 | Ownership: D (Direct) Footnotes: [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. [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. [F2] Includes deferred stock units and dividend equivalent units. [Transaction #18] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -527 | Price: $342.55 Total Value: $180,521.37 Shares Owned After: 75,888 | Ownership: D (Direct) Footnotes: [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. [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. [Transaction #19] Security: Common Stock Date: 2026-06-04 | Code: S (Open market sale) Shares: -200 | Price: $339.56 Total Value: $67,912.00 Shares Owned After: 75,688 | Ownership: D (Direct) Footnotes: [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. [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. --- Footnotes (Complete Index) --- 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. F2: Includes deferred stock units and dividend equivalent units. 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. 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. 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. 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. 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. 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. 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. --- Signature --- /s/ /s/ Philip Mazzara, Attorney-in-Fact (2026-06-08)