X0306 4 2018-05-16 0 0001114995 IMPINJ INC PI 0001677723 BRODERSEN ERIC 400 FAIRVIEW AVENUE NORTH SUITE 1200 SEATTLE WA 98109 0 1 0 0 President and COO Stock Option (RTB) 33.77 2018-05-16 4 D 0 50000 0.00 D 2027-08-11 Common Stock 50000 0 D Stock Option (RTB) 17.33 2018-05-16 4 A 0 32257 0.00 A 2028-05-16 Common Stock 32257 32257 D On May 16, 2018, the Issuer cancelled, pursuant to the Issuer's option exchange program, an option granted to the Reporting Person on August 11, 2017. Each exchanged option to purchase one share of common stock was replaced with a new option to purchase a number of shares of common stock equal to the number of options exchanged divided by 1.55, which represents an exchange ratio based on the exercise price of the exchanged option, subject to rounding. One-fourth of the shares subject to the option vested on July 3, 2018, and 1/48th of the shares subject to the option shall vest each month thereafter. One-fourth of the shares subject to the option vested on January 3, 2019, and 1/48th of the shares subject to the option vest each month thereafter. Yukio Morikubo, Attorney in fact for Eric Brodersen 2019-02-20