X0306 4 2014-03-03 0 0001401708 NanoString Technologies Inc NSTG 0001575897 BURNS WAYNE 530 FAIRVIEW AVENUE N. SUITE 2000 SEATTLE WA 98109 0 1 0 0 SVP, Operations & Admin Common Stock 2014-03-03 4 A 0 1227 6.6215 A 55915 D The reporting person is voluntarily reporting the acquisition of shares of the issuer's common stock pursuant to the NanoString Technologies, Inc. Employee Stock Purchase Plan ("ESPP"), for the ESPP purchase period of August 16, 2013 through March 3, 2014. This transaction is also exempt under Rule 16b-3(c). The Purchase Period (as defined in the ESPP) ended on March 3, 2014. In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the issuer's common stock on August 16, 2013. /s/ Barbara A. Mery, Attorney-in-fact 2014-03-05