X0306 4 2020-01-16 0 0001401708 NanoString Technologies Inc NSTG 0001432055 Bailey K Thomas 530 FAIRVIEW AVENUE N SEATTLE WA 98109 0 1 0 0 Chief Financial Officer Common Stock 2020-01-16 4 M 0 35000 0 A 35000 D Common Stock 2020-01-16 4 F 0 9128 30.84 D 25872 D Restricted Stock Units 2020-01-16 4 M 0 35000 0 D Common Stock 35000.0 0 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. 100% of the RSUs vest on the second anniversary of the Vesting Commencement Date, subject to the Reporting Person continuing to be a Service Provider through such date. /s/ Shannon Atchison, Attorney in Fact 2020-01-21