X0306 4 2019-02-19 false 0001114995 IMPINJ INC PI 0001677721 DIORIO CHRIS PH.D. 400 FAIRVIEW AVE N. SUITE 1200 SEATTLE WA 98109 true true false false Chief Executive Officer STOCK OPTION (RTB) 19.6 2019-02-19 4 A false 620 0 A 2028-10-31 COMMON STOCK 620 620 D On October 31, 2018, the Reporting Person was granted an Option to purchase 10,000 shares of Common Stock. The shares underlying the option vest upon the Reporting Person's satisfaction of certain performance criteria. On February 19, 2019, the Issuer's Board of Directors determined the level at which the corporate performance goals were attained, resulting in the vesting of 620 shares of Common Stock underlying the Option. Yukio Morikubo, Attorney in fact for Chris Diorio 2019-02-20