X0306 4 2017-03-01 false 0001114995 IMPINJ INC PI 0001679785 FEIN EVAN 400 FAIRVIEW AVE N. SUITE 1200 SEATTLE WA 98109 false true false false Chief Financial Officer COMMON STOCK 2017-03-01 4 S false 13124 28.8333 D 20207 D The sales reported by Mr. Fein were effected pursuant to a Rule 10b5-1 trading plan adopted on December 14, 2016. 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 $28.52 to $29.22, 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. Yukio Morikubo as Attorney in fact for Evan Fein 2017-03-03