X0306 4 2022-08-16 0 0001114995 IMPINJ INC PI 0001677721 DIORIO CHRIS PH.D. 400 FAIRVIEW AVENUE NORTH SUITE 1200 SEATTLE WA 98109 1 1 0 0 Chief Executive Officer Common Stock 2022-08-16 4 S 0 1681 95.8202 D 317350 D Common Stock 2022-08-16 4 S 0 3119 96.5112 D 314231 D Common Stock 2022-08-16 4 S 0 200 97.22 D 314031 D Common Stock 2022-08-17 4 S 0 1001 94.0571 D 313030 D Common Stock 2022-08-17 4 S 0 1486 94.9463 D 311544 D Common Stock 2022-08-17 4 S 0 2063 95.9886 D 309481 D Common Stock 2022-08-17 4 S 0 450 96.5606 D 309031 D Common Stock 589994 I by DFT L.L.C The sales reported by Dr. Diorio were effected pursuant to a Rule 10b5-1 trading plan adopted on May 27, 2022. 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 $95.21 to $96.20, 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. 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 $96.22 to $97.15, 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. 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 $93.43 to $94.395, 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. 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 $94.43 to $95.425, 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. 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 $95.43 to $96.415, 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. 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 $96.43 to $96.715, 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. /s/ Yukio Morikubo, Attorney in fact for Chris Diorio 2022-08-18