Impinj Insider Chris Diorio Files Form 4 on March 24, 2026

TL;DR

**Impinj insider Chris Diorio filed a Form 4, signaling a change in his stock ownership.**

AI Summary

This Form 4 filing indicates that Chris Diorio, Ph.D., a reporting insider, filed a statement of changes in beneficial ownership of securities for Impinj Inc. (NASDAQ: PI) on March 24, 2026, for a period ending March 23, 2026. While the filing itself doesn't detail specific transactions, it signals that Dr. Diorio, likely a key executive or director, has had a change in his holdings. This matters to investors because insider transactions can provide insights into how those closest to the company view its future prospects, potentially signaling confidence or concern.

Why It Matters

Insider transaction filings like this can offer a glimpse into the sentiment of company executives and directors regarding their own stock, which can influence investor perception.

Risk Assessment

Risk Level: low — This filing is purely administrative, reporting a change in ownership, and does not inherently indicate a high risk.

Analyst Insight

Investors should monitor subsequent Form 4 filings from Chris Diorio to identify the specific nature (buy/sell) and size of the transactions, as this filing only indicates a change occurred, not the details.

Key Players & Entities

• DIORIO CHRIS PH.D. (person) — Reporting insider
• IMPINJ INC (company) — Issuer of securities
• 0001677721 (person) — CIK for Chris Diorio
• 0001114995 (company) — CIK for Impinj Inc.

FAQ

Filing Documents

• form4-03242026_080342.html (4)
• form4-03242026_080342.xml (4) — 18KB
• 0001677721-26-000005.txt ( ) — 19KB

From the Filing

SEC FORM 4 SEC Form 4 FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940 OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5    Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).    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 * DIORIO CHRIS PH.D. (Last) (First) (Middle) 400 FAIRVIEW AVENUE NORTH SUITE 1200 (Street) SEATTLE WASHINGTON 98109 (City) (State) (Zip) UNITED STATES (Country) 2. Issuer Name and Ticker or Trading Symbol IMPINJ INC [ PI ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner X Officer (give title below) Other (specify below) CHIEF EXECUTIVE OFFICER 2a. Foreign Trading Symbol 3. Date of Earliest Transaction (Month/Day/Year) 03/23/2026 6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person 4. If Amendment, Date of Original Filed (Month/Day/Year) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/23/2026 M 2,594 A $ 0 389,479 D Common Stock 03/23/2026 M 1,224 A $ 0 390,703 D Common Stock 03/23/2026 M 1,817 A $ 0 392,520 D Common Stock 03/23/2026 F (1) 2,218 D $ 101.17 390,302 D Common Stock 199,362 I by DFT L.L.C. Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Units $ 0 (2) 03/23/2026 M 2,594 (3) (3) Common Stock 2,594 $ 0 0 D Restricted Stock Units $ 0 (2) 03/23/2026 M 1,224 (4) (4) Common Stock 1,224 $ 0 4,895 D Restricted Stock Units $ 0 (2) 03/23/2026 M 1,817 (5) (5) Common Stock 1,817 $ 0 14,538 D Restricted Stock Units $ 0 (2) 03/23/2026 A 24,806 (6) (6) Common Stock 24,806 $ 0 24,806 D Explanation of Responses: 1. In an exempt disposition to the Issuer under Rule 16b-3(e), the Reporting Person remitted shares to the Issuer in connection with the satisfaction of tax withholding obligations arising out of the vesting of restricted stock units, or RSUs. 2. Each RSU represents a contingent right to receive one share of Impinj common stock. 3. On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these vested on March 23, 2026. 4. On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on March 23, 2026. 5. On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on March 23, 2026. 6. One-fourth of the shares subject to the grant shall vest on March 23, 2027, and 1/16th of the shares subject to the grant shall vest each quarter thereafter, subject to the reporting person's continued service to the Issuer through such date. /s/ Yukio Morikubo, Attorney in fact for Chris Diorio 03/24/2026 ** Signature of Reporting Person Date 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

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