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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1. Name and Address of Reporting Person * Leddy Peter Michael   2. Issuer Name and Ticker or Trading Symbol NUVASIVE INC [NUVA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP Global HR (Last) (First) (Middle) 7475 LUSK BLVD. 3. Date of Earliest Transaction (Month/Day/Year) 08/01/2017 (Street) SAN DIEGO, CA 92121 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 08/01/2017   P   6,239 A $ 63.74 (1) 10,725 (2) D   Common Stock 08/01/2017   P   1,611 A $ 64.44 (3) 12,336 (2) D   Common Stock 08/01/2017   M   2,265 A $ 0 14,601 (2) D   Common Stock 08/01/2017   F   851 (4) D $ 64.43 13,750 (2) 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

PRSUs (5)

$ 0

08/01/2017

M

2,265

(6)

(6)

Common Stock

2,265

$ 0

4,530

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Leddy Peter Michael 7475 LUSK BLVD. SAN DIEGO, CA 92121			EVP Global HR

Signatures

/s/ Nathaniel B. Sisitsky, Attorney-in-Fact for Peter M. Leddy		08/03/2017
**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)	Weighted average purchase price from purchase transactions ranging from $63.32 to $64.30. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will undertake to provide full information regarding the number of shares purchased at each separate price.
(2)	Shares directly held by the Reporting Person. The Reporting Person also holds conditional rights to receive shares pursuant to Issuer equity awards that have not yet vested.
(3)	Weighted average purchase price from purchase transactions ranging from $64.35 to $64.50. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will undertake to provide full information regarding the number of shares purchased at each separate price.
(4)	Shares withheld by the Issuer to satisfy tax withholding obligations.
(5)	Each performance restricted stock unit ("PRSU") represents the right to receive one share of the Issuer's common stock upon vesting.
(6)	This PRSU award was granted to the Reporting Person on August 1, 2015. In accordance with the terms of the PRSU award, the award vested as to 2,265 shares on each of August 1, 2016 and August 1, 2017 and will vest as to 2,265 shares on each of August 1, 2018 and August 1, 2019.

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