X0306 4 2022-05-24 0 0001114995 IMPINJ INC PI 0001705407 Baker Cary 400 FAIRVIEW AVE N. SUITE 1200 SEATTLE WA 98109 0 1 0 0 Chief Financial Officer Common Stock 2022-05-24 4 M 0 3750 0.00 A 38124 D Common Stock 2022-05-25 4 S 0 1458 43.2389 D 36666 D Restricted Stock Units 0.00 2022-05-24 4 M 0 3750 0.00 D Common Stock 3750 26250 D These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of RSUs. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $43.095 to $43.41, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein. Each restricted stock unit represents a contingent right to receive one share of Impinj common stock. On February 24, 2020, the reporting person was granted 60,000 restricted stock units ("RSUs"), one sixteenth of which vested on May 24, 2022. /s/ Yukio Morikubo, Attorney in fact for Cary Baker 2022-05-26