X0306 4 2019-03-25 0 0001401708 NanoString Technologies Inc NSTG 0001252522 GALAKATOS NICHOLAS C/O CLARUS VENTURES, LLC 101 MAIN STREET, SUITE 1210 CAMBRIDGE MA 02142 1 0 1 0 Common Stock 23.34 2019-03-25 4 A 0 4410 0 A 2029-03-25 Common Stock 4410.0 4410 D 100% of the shares subject to the Option vest on the the date prior to the day of the Company's 2019 annual meeting of stockholders. In accordance with the internal policies of Clarus Ventures, the options received by Dr. Galakatos must be held for the benefit of Clarus Ventures and its affiliates. /s/ Shannon Atchison, Attorney-in-fact 2019-03-25