Chris Ph.d. Diorio - 20 Aug 2026 Form 4 Insider Report for IMPINJ INC (PI)

Reporting relationship: CHIEF EXECUTIVE OFFICER, Director
Issuer ticker: PI
Reported as of: 20 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 21 Aug 2026, 19:08:50 UTC
Prior SEC filing: 18 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Yukio Morikubo, Attorney in fact for Chris Diorio

Key filing fact

Chris Ph.d. Diorio filed Form 4 for IMPINJ INC (PI) on 21 Aug 2026.

Key facts

This page summarizes Chris Ph.d. Diorio's Form 4 filing for IMPINJ INC (PI).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 21 Aug 2026, 19:08.

Change

Previous filing in this sequence was filed on 18 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001677721 Primary reporting owner

DIORIO CHRIS PH.D.

Relationship: CHIEF EXECUTIVE OFFICER, Director
Address: 400 FAIRVIEW AVENUE NORTH, SUITE 1200, SEATTLE
Signature: /s/ Yukio Morikubo, Attorney in fact for Chris Diorio
Signature date: 21 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

PI transaction

Common Stock

Options Exercise

Transaction value
Shares: +3,753
Change %: +1%
Price: $0.000000^*
Shares after: 365,898
Date: 20 Aug 2026
Ownership: Direct

PI transaction

Common Stock

Tax liability

Transaction value
Shares: -1,477
Change %: -0.4%
Price: $159.73^*
Shares after: 364,421
Date: 20 Aug 2026
Ownership: Direct
Footnotes: F1

PI holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 199,362
Date: 20 Aug 2026
Ownership: by DFT L.L.C.

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

PI transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -3,753
Change %: -25%
Price: $0.000000^*
Shares after: 11,262
Date: 20 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 3,753
Exercise price: $0.000000
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

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.

Footnote F2

Each RSU represents a contingent right to receive one share of Impinj common stock.

Footnote F3

On August 20, 2025, the reporting person was granted 15,015 RSUs. One-fourth of these vested on August 20, 2026.