X0306 4 2016-12-05 0 0001401708 NanoString Technologies Inc NSTG 0001575897 BURNS WAYNE 530 FAIRVIEW AVENUE N. SEATTLE WA 98109 0 1 0 0 SVP, Operations & Admin Common Stock 2016-12-05 4 M 0 11330 12.77 A 71034 D Common Stock 2016-12-05 4 S 0 11330 22.04 D 59704 D Common Stock 2016-12-06 4 M 0 6170 12.77 A 65874 D Common Stock 2016-12-06 4 M 0 4166 12.94 A 70040 D Common Stock 2016-12-06 4 S 0 10336 22.03 D 59704 D Stock Option (right to buy) 12.77 2016-12-05 4 M 0 11330 0.00 D 2025-02-09 Common Stock 11330 28670 D Stock Option (right to buy) 12.77 2016-12-06 4 M 0 6170 0.00 D 2025-02-09 Common Stock 6170 22500 D Common Stock (right to buy) 12.94 2016-12-06 4 M 0 4166 0.00 D 2026-02-05 Common Stock 4166 15834 D The sales reported by Mr. Burns were effected pursuant to a Rule 10b5-1 trading plan adopted on November 17, 2016. 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 $22.00 to $22.18, 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 $22.00 to $22.11, 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. 1/48 of the shares subject to such option shall vest on each monthly anniversary of February 9, 2015. The shares subject to this option shall vest at a rate of 1/48th of the total number of shares on the one-month anniversary of February 5, 2016 (the "Option Vesting Commencement Date"), and 1/48th of the total number of shares vest each monthly anniversary of the Option Vesting Commencement Date thereafter, for so long as the recipient of the option remains a Service Provider, such that the total number of shares shall be fully vested on the four-year anniversary of the Option Vesting Commencement Date. /s/ Shannon Atchison, attorney-in-fact 2016-12-07