X0306 4 2016-09-06 0 0001401708 NanoString Technologies Inc NSTG 0001134570 WAITE CHARLES P JR C/O OVP VENTURE PARTNERS 1616 EASTLAKE AVE. E., SUITE 208 SEATTLE WA 98102 1 0 0 0 Common Stock 2016-09-06 4 S 0 6106 16.56 D 550108 I See footnote Common Stock 2016-09-07 4 S 0 16811 16.50 D 533297 I See footnote Common Stock 2016-09-08 4 S 0 6188 16.50 D 527109 I See footnote Common Stock 1707 D 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 $16.50 to $16.65, 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. 391,719 of these shares are owned by OVP Venture Partners VI, L.P.,157,589 of these shares are owned by OVP Venture Partners VII, L.P., and 800 of these shares are owned by OVP VII Entrepreneurs Fund, L.P. OVMC VI, LLC serves as the general partner of OVP Venture Partners VI, L.P. Charles P. Waite, Jr. is a managing member of OVMC VI, LLC and shares voting and investment power over the shares held by OVP Venture Partners VI, L.P. Charles P. Waite, Jr. is also a managing member of OVMC VII, LLC, the general partner of OVP Venture Partners VII, L.P. and OVP VII Entrepreneurs Fund, L.P., and shares voting and investment power over the shares held by OVP Venture Partners VII, L.P. and OVP VII Entrepreneurs Fund, L.P. Mr. Waite, the other managing members of OVMC VI, LLC and OVMC VII, LLC, and each of the aforementioned entities disclaim beneficial ownership of the reported securities except to the extent of any pecuniary interest therein. 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 $16.50 to $16.51, 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. 379,748 of these shares are owned by OVP Venture Partners VI, L.P.,152,773 of these shares are owned by OVP Venture Partners VII, L.P., and 776 of these shares are owned by OVP VII Entrepreneurs Fund, L.P. 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 $16.50 to $16.5486, 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. 375,340 of these shares are owned by OVP Venture Partners VI, L.P.,151,000 of these shares are owned by OVP Venture Partners VII, L.P., and 769 of these shares are owned by OVP VII Entrepreneurs Fund, L.P. /s/ Ivan Kaplan, Attorney-in-fact 2016-09-08