Mazzara Philip 4
4 · Astera Labs, Inc. · Filed May 20, 2026
Research Summary
AI-generated summary of this filing
Astera Labs (ALAB) GC Philip Mazzara Sells Shares
What Happened
Philip Mazzara, General Counsel and Secretary of Astera Labs, sold a total of 14,076 shares of ALAB on May 18, 2026 in a series of open-market transactions. The individual lots were sold at prices ranging roughly from $216.10 to $235.36, producing aggregate proceeds of about $3,262,540. The filing identifies these as sales (code S) and the principal footnote (F1) states the sales were automatic "sell-to-cover" transactions to satisfy tax withholding on vested restricted stock units (RSUs), not discretionary trades.
Key Details
- Transaction date: 2026-05-18; Form 4 filed: 2026-05-20 (appears timely under the two-business-day Form 4 rule).
- Total shares sold: 14,076 shares; Total proceeds: ≈ $3,262,540.
- Price range across lots: approx. $216.10 to $235.36 (several weighted-average prices reported for different lots; footnotes F2–F18 provide per-lot ranges and note availability of per-price detail on request).
- Shares owned after transaction: Not specified in the provided excerpt of the filing.
- Notable footnotes: F1 — sales were automatic sell-to-cover for tax withholding tied to RSU vesting (i.e., not a discretionary sale). F2–F18 — explain weighted-average prices and ranges for multiple trades.
- Transaction code: S = Sale. Filing shows no indication of lateness.
Context
Sell-to-cover transactions are routine administrative moves to satisfy tax obligations when RSUs vest; they are generally considered procedural rather than a signal about the insider’s view of the company. For retail investors, discretionary buys by insiders tend to be more informative than mandatory withholding sales. If you want the exact per-trade prices within each weighted-average lot, the filer has committed to provide that breakdown on request.
Insider Transaction Report
Form 4
Mazzara Philip
General Counsel and Secretary
Transactions
- Sale
Common Stock
2026-05-18$235.36/sh−9,204$2,166,253→ 109,011 total - Sale
Common Stock
[F1][F2]2026-05-18$235.41/sh−990$233,060→ 108,021 total - Sale
Common Stock
[F1][F3]2026-05-18$233.19/sh−116$27,050→ 107,905 total - Sale
Common Stock
[F1][F4]2026-05-18$232.81/sh−99$23,048→ 107,806 total - Sale
Common Stock
[F1][F5]2026-05-18$231.31/sh−387$89,518→ 107,419 total - Sale
Common Stock
[F1][F6]2026-05-18$230.28/sh−186$42,832→ 107,233 total - Sale
Common Stock
[F1][F7]2026-05-18$229.54/sh−55$12,625→ 107,178 total - Sale
Common Stock
[F1][F8]2026-05-18$226.71/sh−275$62,346→ 106,903 total - Sale
Common Stock
[F1][F9]2026-05-18$225.76/sh−90$20,318→ 106,813 total - Sale
Common Stock
[F1][F10]2026-05-18$225.01/sh−35$7,875→ 106,778 total - Sale
Common Stock
[F1][F11]2026-05-18$223.75/sh−245$54,818→ 106,533 total - Sale
Common Stock
[F1][F12]2026-05-18$222.20/sh−189$41,996→ 106,344 total - Sale
Common Stock
[F1][F13]2026-05-18$221.01/sh−170$37,571→ 106,174 total - Sale
Common Stock
[F1][F14]2026-05-18$220.20/sh−274$60,335→ 105,900 total - Sale
Common Stock
[F1][F15]2026-05-18$218.87/sh−356$77,917→ 105,544 total - Sale
Common Stock
[F1][F16]2026-05-18$218.06/sh−364$79,373→ 105,180 total - Sale
Common Stock
[F1][F17]2026-05-18$216.97/sh−646$140,164→ 104,534 total - Sale
Common Stock
[F1][F18]2026-05-18$216.31/sh−395$85,441→ 104,139 total
Footnotes (18)
- [F1]Represents shares of the Issuer's Common Stock required to be sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting and settlement of restricted stock units previously granted to the Reporting Person. Such sales were automatic and mandated by an election of the Issuer made in advance of the vesting event to require the satisfaction of tax withholding obligations to be funded by a "sell to cover", and does not represent a discretionary trade by the Reporting Person.
- [F10]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $225.0500 to $224.5000, 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.
- [F11]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $223.9900 to $223.3000, 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 $222.6400 to $221.6800, 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 $221.6400 to $220.6500, 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 $220.5200 to $219.7000, 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 $219.5100 to $218.5300, 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.
- [F16]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $218.5000 to $217.5400, 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 $217.5000 to $216.5200, 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.
- [F18]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $216.4900 to $216.1000, 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]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $235.9400 to $235.3600, 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]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $233.9800 to $233.1600, 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.
- [F4]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $232.9700 to $232.7700, 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 $231.9000 to $230.9300, 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 $230.79000 to $229.9400, 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 $229.7900 to $228.9350, 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 $227.2000 to $226.2800, 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 $226.1800 to $225.2700, 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.
Signature
/s/ Philip Mazzara|2026-05-20