X0306 4 2022-11-01 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 2022-11-01 4 S 0 991 111.3445 D 288316 D Common Stock 2022-11-01 4 S 0 109 112.5826 D 288207 D Common Stock 2022-11-01 4 S 0 1956 113.284 D 286251 D Common Stock 2022-11-01 4 S 0 1543 114.3397 D 284708 D Common Stock 2022-11-01 4 S 0 401 115.4962 D 284307 D Common Stock 2022-11-01 4 J 0 17500 0.00 D 572494 I by DFT L.L.C Common Stock 2022-11-01 4 J 0 8333 0.00 A 292640 D Common Stock 2022-11-02 5 G 0 E 10000 0.00 D 282640 D 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 $110.83 to $111.76, 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 $111.90 to $112.71, 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 $112.90 to $113.86, 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 $113.93 to $114.88, 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 $114.97 to $115.95, 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. Distribution of Common Stock held by DFT L.L.C. to its members for no consideration. Change from indirect to direct ownership of shares previously reported as beneficially owned by the reporting person. /s/ Yukio Morikubo, Attorney in fact for Chris Diorio 2022-11-02