DIORIO CHRIS PH.D. 4

What Happened

• Chris Diorio, CEO of Impinj (PI), had 21,734 shares of Common Stock vest on Feb 20, 2026 tied to performance restricted stock units (PSUs) originally granted Mar 23, 2023. The vested shares were issued at $0 (award).
• Concurrently, Diorio remitted 7,435 shares to Impinj in an exempt disposition to satisfy tax withholding obligations related to the vesting. The remitted shares were valued at $127.92 per share, totaling approximately $951,085.
• This transaction is primarily an award/vesting event with a routine tax-withholding share remittance (not an open-market sale or a purchase).

Key Details

• Transaction date: 2026-02-20; Form 4 filed: 2026-02-23 (appears timely).
• Award: 21,734 shares issued at $0 (vested PSUs).
• Tax withholding: 7,435 shares remitted (Disposed) at $127.92/share = ~$951,085.
• Relevant footnotes: F1 — PSUs granted Mar 23, 2023 and vested after board determined performance goals met on Feb 18, 2026. F2 — Shares remitted to issuer under Rule 16b-3(e) to satisfy tax withholding.
• Shares owned after the transaction: not specified in the provided excerpt of the filing.

Context

• Vesting of PSUs is a common form of executive compensation and the remittance of shares to cover taxes is a routine, administrative step (often called a cashless or “share-surrender” withholding). These actions are not the same as a voluntary market sale and do not necessarily signal insider sentiment about the stock.