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 * Stephenson Kirtley C.   2. Issuer Name and Ticker or Trading Symbol SeaSpine Holdings Corp [SPNE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O SEASPINE HOLDINGS CORPORATION, 5770 ARMADA DR 3. Date of Earliest Transaction (Month/Day/Year) 05/30/2018 (Street) CARLSBAD, CA 92008 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 05/30/2018   A   13,286 (1) A $ 0 57,474 D   Common Stock 05/30/2018   A   6,643 (2) A $ 0 64,117 D   Common Stock               9,700 (3) I By Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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
Stephenson Kirtley C. C/O SEASPINE HOLDINGS CORPORATION 5770 ARMADA DR CARLSBAD, CA 92008	X

Signatures

/s/ Paul Benny, Attorney-in-Fact for Kirtley C. Stephenson		05/31/2018
**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)	The restricted stock award vests in full on May 30, 2019, subject to the Reporting Person not experiencing a termination of service prior to such date. In addition, if the Reporting Person stands for reelection to the board of directors of SeaSpine Holdings Corporation ("SeaSpine") at an annual meeting of stockholders but is not reelected to the board at such annual meeting, the award will vest in full on the date of such annual meeting.
(2)	The restricted stock award vests as to 25% of the shares subject to the award on the last day of each three-month period of the Reporting Person's continuous service on SeaSpine's board of directors following May 30, 2018.
(3)	Includes 9,700 shares of common stock held by the Kirtley & Leslie Stephenson 2014 Trust. The Reporting Person is a trustee of such trust and has shared investment power over such shares.

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