FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN 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 * MINOCHERHOMJEE ARDA   2. Issuer Name and Ticker or Trading Symbol NUVASIVE INC [NUVA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) WILLIAM BLAIR CAPITAL PARTNERS, L.L.C., 303 W. MADISON, SUITE 2500 3. Date of Earliest Transaction (Month/Day/Year) 06/14/2005 (Street) CHICAGO, IL 60606 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 06/14/2005   J(1)   2,000,000 (2) D (1) 795,880 I See footnote (3) Common Stock 06/14/2005   J(1)   200,119 (4) A (1) 995,999 I See footnote (3) Common Stock 06/14/2005   J(5)   200,119 (4) D (5) 795,880 I See footnote (3) Common Stock 06/14/2005   J(5)   248 (6) A (5) 796,128 I See footnote (3) Common Stock 06/14/2005   J(5)   2,706 A (5) 798,834 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MINOCHERHOMJEE ARDA WILLIAM BLAIR CAPITAL PARTNERS, L.L.C. 303 W. MADISON, SUITE 2500 CHICAGO, IL 60606	X	X

Signatures

/s/ Arda M. Minocherhomjee		06/14/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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)	Pro rata distribution of shares by William Blair Capital Partners VII QP, L.P. and William Blair Capital Partners VII, L.P. to their partners.
(2)	Represents 1,925,781 shares directly owned by William Blair Capital Partners VII QP, L.P. and 74,219 shares directly owned by William Blair Capital Partners VII, L.P.
(3)	William Blair Capital Management VII, L.P. is the general partner of William Blair Capital Partners VII QP, L.P. and William Blair Capital Partners VII, L.P. William Blair Capital Management VII, L.L.C. is the general partner of William Blair Capital Management VII, L.P. The Reporting Person is a managing director and limited partner of William Blair Capital Management VII, L.P. and a managing director and member of William Blair Capital Management VII, L.L.C. Accordingly, William Blair Capital Management VII, L.P., William Blair Capital Management VII, L.L.C. and the Reporting Person may be deemed beneficial owners of the shares listed in Table 1. The Reporting Person disclaims beneficial ownership of the shares except to the extent of his proportionate pecuniary interest in the shares.
(4)	Represents shares directly held by William Blair Capital Management VII, L.P.
(5)	Pro rata distribution of shares by William Blair Capital Management VII, L.P. to its partners.
(6)	Represents shares directly owned by William Blair Capital Management VII, L.L.C.

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