144 0001677721 XXXXXXXX LIVE Chris Rossi 877-804-3529 chris.rossi@schwab.com false Alexander.Levicki@schwab.com 0001114995 IMPINJ INC 001-37824 400 FAIRVIEW AVENUE NORTH SUITE 1200 SEATTLE WA 98109 206-517-5300 DIORIO CHRIS PH.D. Officer Common Charles Schwab & Co., Inc.

211 Main Street San Francisco CA 94105

1218 96485.00 25599992 10/13/2022 NASDAQ Common 10/12/2022 Restricted Stock Lapse IMPINJ, INC. N 1218 10/12/2022 Equity Compensation N CHRIS DIORIO

400 Fairview Avenue North, Suite 1200 Seattle WA 98109

IMPINJ, INC. 10/03/2022 1452 123083.00 CHRIS DIORIO

400 Fairview Avenue North, Suite 1200 Seattle WA 98109

IMPINJ, INC. 09/16/2022 647 56900.00 CHRIS DIORIO

400 Fairview Avenue North, Suite 1200 Seattle WA 98109

IMPINJ, INC. 08/23/2022 5000 458150.00 CHRIS DIORIO

400 Fairview Avenue North, Suite 1200 Seattle WA 98109

IMPINJ, INC. 08/22/2022 5000 457100.00 CHRIS DIORIO

400 Fairview Avenue North, Suite 1200 Seattle WA 98109

IMPINJ, INC. 08/17/2022 5000 477050.00 CHRIS DIORIO

400 Fairview Avenue North, Suite 1200 Seattle WA 98109

IMPINJ, INC. 08/16/2022 5000 483750.00 CHRIS DIORIO

400 Fairview Avenue North, Suite 1200 Seattle WA 98109

IMPINJ, INC. 07/13/2022 1242 80055.00 10/13/2022 CHRIS DIORIO