X0206 3 2016-07-20 0 0001114995 IMPINJ INC PI 0001184752 ALBERG TOM A 400 FAIRVIEW AVE N. SUITE 1200 SEATTLE WA 98109 true false false false SERIES 1 PREFERRED STOCK 0 COMMON STOCK 672895 I See footnote SERIES 2 PREFERRED STOCK 0 COMMON STOCK 412203 I See footnote SERIES 2 WARRANT (RTB) 9.32 2017-06-30 COMMON STOCK 29623 I See footnote Reflects a 1-for-12 reverse stock split of the Issuer's outstanding shares effected July 8, 2016. The Series 1 Preferred Stock will automatically convert to shares of the Issuer's Common Stock upon the closing of the Issuer's initial public offering on a 1-for-1 basis. Each share has no expiration date. 72,531 of these shares are held of record by Madrona Managing Director Fund, LLC; 541,350 of these shares are held of record by Madrona Venture Fund I-A, L.P.; and 59,014 of these shares are held of record by Madrona Venture Fund I-B, L.P. Madrona Investment Partners, LLC, as the sole general partner of Madrona Venture Fund I-A, L.P. and Madrona Venture Fund I-B, L.P., may be deemed to beneficially own certain of the shares held of record by Madrona Venture Fund I-A, L.P. and Madrona Venture Fund I-B, L.P. but disclaims beneficial ownership of such shares in which it does not have an actual pecuniary interest. Tom A. Alberg, a member of the board of directors, disclaims beneficial ownership of all shares held of record by Madrona Managing Director Fund, LLC, Madrona Venture Fund I-A, L.P. and Madrona Venture Fund I-B, L.P., in which he does not have an actual pecuniary interest. By virtue of their relationship as affiliated entities who have overlapping general partners and managing directors, Madrona Managing Director Fund, LLC, Madrona Venture Fund I-A, L.P., Madrona Venture Fund I-B, L.P., Madrona Investment Partners, LLC and Mr. Alberg may be deemed to share voting and investment control of the record shares. The Series 2 Preferred Stock will automatically convert to shares of the Issuer's Common Stock upon the closing of the Issuer's initial public offering on a 1.24996780424983-for-1 basis. 44,409 shares are held of record by Madrona Managing Director Fund, LLC; 331,695 shares are held of record by Madrona Venture Fund I-A, L.P.; and 36,099 shares are held of record by Madrona Venture Fund I-B, L.P. 3,191 shares are held of record by Madrona Managing Director Fund, LLC; 23,838 shares are held of record by Madrona Venture Fund I-A, L.P.; and 2,594 shares are held of record by Madrona Venture Fund I-B, L.P. Power of Attorney Yukio Morikubo as Attorney in fact for Tom Alberg 2016-07-20