X0306 4/A 2021-03-11 2021-03-15 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 183489 D The Form 4 filed on March 15, 2021 inadvertently misstated the number of securities beneficially owned by the Reporting Person following the vesting of 54,315 restricted stock units ("RSUs"). In addition, the Form 4 filed on March 15, 2021 reported a sale to cover the Reporting Person's tax liability in connection with the vesting of such RSUs, which sale did not occur. The number reported in Column 5 of this Form 4/A represents the amount of securities beneficially owned by the Reporting Person as of March 11, 2021. /s/ Shannon Atchison, Attorney in Fact 2021-04-13