X0306 4 2020-03-16 0 0001401708 NanoString Technologies Inc NSTG 0001710720 BROWN J. CHAD 530 FAIRVIEW AVENUE N SEATTLE WA 98109 0 1 0 0 SVP, Sales & Marketing Common Stock 2020-03-16 4 M 0 5376 0 A 23554 D Common Stock 2020-03-16 4 F 0 1310 19.53 D 22244 D Restricted Stock Units 2020-03-16 4 M 0 5376 0 D Common Stock 5376.0 10753 D The reported shares were withheld to cover the reporting person's tax liability in connection with the vesting of RSUs. The shares were not issued to or sold by the reporting person. Each restricted stock unit ("RSU") represents a contingent right to receive one (1) share of Issuer's common stock. 1/3 of the RSUs vest on the first market trading day following the first anniversary of March 13, 2019 (the "RSU Vesting Commencement Date"), and 1/3 of the RSUs vest annually each year on the first market trading day after the second and third anniversary of the RSU Vesting Commencement Date, in each case, subject to Participant's continuing to be a Service Provider (as defined in the 2013 Equity Incentive Plan) through each such date. /s/ Shannon Atchison, Attorney-in-fact 2020-03-18