X0306 4 2020-06-15 0 0001401708 NanoString Technologies Inc NSTG 0001326794 Malloy Kirk 530 FAIRVIEW AVENUE N SEATTLE WA 98109 1 0 0 0 Common Stock 2020-06-15 4 M 0 1890 A 3780 D Restricted Stock Units 2020-06-15 4 M 0 1890 0 D Common Stock 1890.0 0 D Restricted Stock Units 2020-06-16 4 A 0 5520 0 A Common Stock 5520.0 5520 D Restricted stock units ("RSUs") convert into Common Stock on a one-for-one basis. Each RSU represents a contingent right to receive one (1) share of Issuer's common stock. 100% of the RSUs vest on the earlier of the one year anniversary of June 18, 2019 or on the date immediately prior to the 2020 annual meeting of stockholders. 100% of the RSUs vest on the earlier of the one year anniversary of June 16, 2020 or on the date immediately prior to the 2021 annual meeting of stockholders. /s/ Shannon Atchison, Attorney-in-fact 2020-06-17