X0306 4 2020-06-18 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 2020-06-18 4 M 0 6363 1.92 A 109266 D Common Stock 2020-06-18 4 S 0 6363 33.57 D 102903 D Common Stock 2020-06-19 4 M 0 13637 1.92 A 116540 D Common Stock 2020-06-19 4 S 0 13637 33.58 D 102903 D Stock Option (right to buy) 1.92 2020-06-18 4 M 0 6363 1.92 D 2022-02-28 Common Stock 6363.0 100219 D Stock Option (right to buy) 1.92 2020-06-19 4 M 0 13637 1.92 D 2022-02-28 Common Stock 13637.0 86582 D The sales reported by Mr. Gray were effected pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2019. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $33.50 to $33.80, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $33.50 to $33.70, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein. The Stock Option fully vested on March 1, 2016. /s/ Shannon Atchison, Attorney in Fact 2020-06-22