Chris Ph.d. Diorio - 23 Sep 2025 Form 4 Insider Report for IMPINJ INC (PI)

Role
CHIEF EXECUTIVE OFFICER, Director
Signature
/s/ Yukio Morikubo, Attorney in fact for Chris Diorio
Issuer symbol
PI
Transactions as of
23 Sep 2025
Net transactions value
-$410,448
Form type
4
Filing time
24 Sep 2025, 16:30:14 UTC
Previous filing
19 Sep 2025
Next filing
30 Oct 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
DIORIO CHRIS PH.D. CHIEF EXECUTIVE OFFICER, Director 400 FAIRVIEW AVENUE NORTH, SUITE 1200, SEATTLE /s/ Yukio Morikubo, Attorney in fact for Chris Diorio 24 Sep 2025 0001677721

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction PI Common Stock Options Exercise $0 +2,594 +0.74% $0.000000 353,682 23 Sep 2025 Direct
transaction PI Common Stock Options Exercise $0 +1,224 +0.35% $0.000000 354,906 23 Sep 2025 Direct
transaction PI Common Stock Options Exercise $0 +1,818 +0.51% $0.000000 356,724 23 Sep 2025 Direct
transaction PI Common Stock Tax liability $410,448 -2,219 -0.62% $184.97 354,505 23 Sep 2025 Direct F1
holding PI Common Stock 199,362 23 Sep 2025 by DFT L.L.C.

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction PI Restricted Stock Units Options Exercise $0 -2,594 -33% $0.000000 5,188 23 Sep 2025 Common Stock 2,594 $0.000000 Direct F2, F3
transaction PI Restricted Stock Units Options Exercise $0 -1,224 -14% $0.000000 7,343 23 Sep 2025 Common Stock 1,224 $0.000000 Direct F2, F4
transaction PI Restricted Stock Units Options Exercise $0 -1,818 -9.1% $0.000000 18,172 23 Sep 2025 Common Stock 1,818 $0.000000 Direct F2, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.