X0306 4 2017-09-01 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 2017-09-01 4 M false 3500 0.6 A 15300 D COMMON STOCK 2017-09-01 4 M false 5500 1.2 A 20800 D COMMON STOCK 2017-09-01 4 S false 4462 37.4351 D 16338 D COMMON STOCK 2017-09-01 4 S false 4538 38.5516 D 11800 D STOCK OPTION (RTB) 0.6 2017-09-01 4 M false 3500 0 D 2019-10-21 COMMON STOCK 3500 0 D STOCK OPTION (RTB) 1.2 2017-09-01 4 M false 5500 0 D 2022-08-07 COMMON STOCK 5500 20750 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 sale price, respectively, of shares sold. These shares were sold in multiple trasactions at prices ranging from $37.17 to $37.88, 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 sale price, respectively, of shares sold. These shares were sold in multiple trasactions at prices ranging from $38.18 to $38.75, 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 option became fully vested on October 22, 2013. The option became fully vested on July 1, 2016. /s/ Yukio Morikubo as Attorney in fact for Evan Fein 2017-09-06