FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   Clarus Lifesciences II, L.P. 2. Date of Event Requiring Statement (Month/Day/Year) 06/25/2013 3. Issuer Name and Ticker or Trading Symbol NanoString Technologies Inc [NSTG] (Last) (First) (Middle) C/O OF CLARUS VENTURES, LLC, 101 MAIN STREET, SUITE 1210 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) CAMBRIDGE, MA 02142 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series C Preferred Stock	  (1)	  (2)	Common Stock	2,249,053 (3) (4) (5)	$ 0	D	Â
Series D Preferred Stock	  (1)	  (2)	Common Stock	812,045 (3) (4) (5)	$ 0	D	Â
Series D Preferred Warrant (Right to Buy)	  (1)	11/01/2018	Common Stock	162,408 (3) (4) (5)	$ 0	D	Â
Series E Preferred Stock	  (1)	  (2)	Common Stock	148,342 (3) (4) (5)	$ 0	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Clarus Lifesciences II, L.P. C/O OF CLARUS VENTURES, LLC 101 MAIN STREET, SUITE 1210 CAMBRIDGE, MA 02142	Â	  X	Â	Â
Clarus Ventures II GP, L.P. C/O OF CLARUS VENTURES, LLC 101 MAIN STREET, SUITE 1210 CAMBRIDGE, MA 02142	Â	  X	Â	Â
Clarus Ventures II, LLC C/O OF CLARUS VENTURES, LLC 101 MAIN STREET, SUITE 1210 CAMBRIDGE, MA 02142	Â	  X	Â	Â

Signatures

/s/ Barbara Mery, Attorney-in-fact		06/25/2013
**Signature of Reporting Person		Date
Barbara Mery, Attorney-in-fact on behalf of Clarus Ventures II GP, L.P.		06/25/2013
**Signature of Reporting Person		Date
Barbara Mary, Attorney-in-fact on behalf of Clarus Ventures II, LLC		06/25/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Reflects the automatic conversion of each share of Series C Preferred Stock, Series D Preferred Stock and Series E Preferred Stock into one share of Common Stock to occur upon the closing of the Issuer's initial public offering.
(2)	Each share has no expiration date.
(3)	Reflects a 1-for-32 reverse stock split of the Issuer's outstanding shares effected June 12, 2013.
(4)	Clarus Ventures II GP, L.P. (the "GPLP"), as the sole general partner of Clarus Lifesciences II, L.P. ("Clarus"), may be deemed to beneficially own certain of the shares held of record by Clarus. The GPLP disclaims beneficial ownership of all shares held of record by Clarus in which the GPLP does not have an actual pecuniary interest. Clarus Ventures II, LLC (the "GPLLC"), as the sole general partner of the GPLP, may be deemed to beneficially own certain of the shares held of record by Clarus. The GPLLC disclaims beneficial ownership of all shares held of record by Clarus in which it does not have an actual pecuniary interest. Each of Nicholas Galakatos, a member of the board of directors, and Messrs. Henner, Liptak, Simon, Steinmetz and Wheeler, as individual Managing Directors of the GPLLC, may be deemed to beneficially own certain of the shares held of record by Clarus.
(5)	Each of Messrs. Galakatos, Henner, Liptak, Simon, Steinmetz and Wheeler disclaims beneficial ownership of all shares held of record by Clarus in which he does not have an actual pecuniary interest.

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