IMPINJ INC — Director's Dealing 2025

Sep 24, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IMPINJ INC (PI)
CIK: 0001114995
Period of Report: 2025-09-23

Reporting Person: DIORIO CHRIS PH.D. (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-09-23	Common Stock	M	2594	—	Acquired	353682	Direct
2025-09-23	Common Stock	M	1224	—	Acquired	354906	Direct
2025-09-23	Common Stock	M	1818	—	Acquired	356724	Direct
2025-09-23	Common Stock	F	2219	$184.97	Disposed	354505	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-09-23	Restricted Stock Units	$0	M	2594	Disposed		Common Stock (2594)	Direct
2025-09-23	Restricted Stock Units	$0	M	1224	Disposed		Common Stock (1224)	Direct
2025-09-23	Restricted Stock Units	$0	M	1818	Disposed		Common Stock (1818)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	199362	Indirect

Footnotes

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.

F2: Each RSU represents a contingent right to receive one share of Impinj common stock.

F3: On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these vested on September 23, 2025.

F4: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on September 23, 2025.

F5: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on September 23, 2025.