X0306 4 2020-09-01 0 0001401708 NanoString Technologies Inc NSTG 0001576195 BEECHEM JOSEPH M 530 FAIRVIEW AVENUE N SEATTLE WA 98109 0 1 0 0 SVP, Research & Development Common Stock 2020-09-01 4 A 0 342 29.7585 A 56579 D The reporting person is voluntarily reporting the acquisition of shares of the issuer's common stock pursuant to the NanoString Technologies, Inc. Employee Stock Purchase Plan ("ESPP"), for the ESPP Purchase Period (as defined in the ESPP) of March 2, 2020 through September 1, 2020. This transaction is also exempt under Rule 16b-3(c). The Purchase Period ended September 1, 2020 and is the first of two Purchase Periods comprising the Offering Period (as defined in the ESPP) that began March 1, 2020. In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the issuer's common stock on September 1, 2020. /s/ Shannon Atchison, Attorney-in-fact 2020-09-01