X0306 4 2018-03-13 0 0001401708 NanoString Technologies Inc NSTG 0001405104 Norden Gregory 530 FAIRVIEW AVENUE N SEATTLE WA 98109 1 0 0 0 Common Stock 2018-03-13 4 A 0 10000 6.93 A 10000 D The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares purchased. These shares were purchased in multiple transactions at prices ranging from $6.900 to $6.965, 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 purchased at each separate price within the range set forth herein. /s/ Shannon Atchison, Attorney-in-fact 2018-03-14