X0306 4/A 2017-08-07 2017-08-09 0 0001401708 NanoString Technologies Inc NSTG 0001575739 GRAY R BRADLEY 530 FAIRVIEW AVENUE N SEATTLE WA 98109 1 1 0 0 President and CEO Common Stock 2017-08-07 4 M 0 7440 6.72 A 83225 D Common Stock 2017-08-07 4 M 0 1005 1.92 A 84230 D Common Stock 2017-08-07 4 M 0 33481 2.24 A 117711 D Common Stock 2017-08-07 4 M 0 8370 2.24 A 126081 D Stock Option (right to buy) 6.72 2017-08-07 4 M 0 7440 0 D 2023-01-09 Common Stock 7440.0 61309 D Stock Option (right to buy) 1.92 2017-08-07 4 M 0 1005 0 D 2022-02-28 Common Stock 1005.0 126582 D Stock Option (right to buy) 2.24 2017-08-07 4 M 0 33481 0 D 2020-06-29 Common Stock 33481.0 0 D Stock Option (right to buy) 2.24 2017-08-07 4 M 0 8370 2.24 D 2020-06-29 Common Stock 8370.0 0 D The reporting person's original Form 4 filing inadvertently omitted information related to the option exercise. The option is fully vested. The Reporting Person's Form 3 erroneously overstated by 1 share the number of derivative securities beneficially owned. /s/ Shannon Atchison, Attorney in Fact 2020-08-05