144 0002003074 XXXXXXXX LIVE 0001114995 IMPINJ INC 001-37824 400 FAIRVIEW AVENUE NORTH SUITE 1200 SEATTLE WA 98109 206-517-5300 SYLEBRA CAPITAL LLC 10% Stockholder Common Stock Goldman Sachs &Co. LLC

200 West Street New York NY 10282

32031 6257416.01 3021548 10/30/2024 NASDAQ Common Stock 03/01/2017 Open Market Purchases - please refer to explanatory notes under the section of Remarks. Open Market Purchases - please refer to explanatory notes under the section of Remarks N 32031 03/01/2017 DVP- Cash N Sylebra Capital LLC

3000 El Camino Real Palo Alto CA 94306

Common Stock 10/29/2024 143773 29034526.03 Please note that the securities to be sold were acquiredfrom Mar 2017 to Aug 2023. The reporting person herebyundertakes to provide upon request to the SEC staff or theissuer full information regarding the number of shares andprices at which the transactions were effected. 10/30/2024 Matthew Whitehead