Nanostring Technologies (NSTG): Foresite Capital Growing More Bullish

1.

NAME OF REPORTING PERSONS          Foresite Capital Fund III, L.P. (“FCF III”)

2.

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a)      o     (b)     x

3.

SEC USE ONLY

4.

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

5.

SOLE VOTING POWER

434,500 shares, except that Foresite Capital Management III, LLC (“FCM III”), the general
partner of FCF III, may be deemed to have sole power to vote these shares, and James Tananbaum (“Tananbaum”), the managing
member of FCM III, may be deemed to have sole power to vote these shares.

6.

SHARED VOTING POWER

See response to row 5.

7.

SOLE DISPOSITIVE POWER

434,500 shares, except that FCM III, the general partner of FCF III, may be deemed to have sole power
to dispose of these shares, and Tananbaum, the managing member of FCM III, may be deemed to have sole power to dispose of these
shares.

8.

SHARED DISPOSITIVE POWER

See response to row 7.

9.

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

434,500

10.

CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES

o

11.

 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW
(9)

2.2%

12.

TYPE OF REPORTING PERSON

PN