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 * Berkowitz Mortimer III   2. Issuer Name and Ticker or Trading Symbol Alphatec Holdings, Inc. [ATEC] 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 ALPHATEC SPINE, INC., 5818 EL CAMINO REAL 3. Date of Earliest Transaction (Month/Day/Year) 05/17/2018 (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 05/17/2018   M   126,985 A (1) 327,918 (2) D   Common Stock 05/17/2018   M   126,985 A (1) 326,985 I By Porcupine Investment Partners, LLC Common Stock               898,098 I By HealthpointCapital Partners, L.P. (3) Common Stock               1,750,880 I By HealthpointCapital Partners II, L.P. (3)

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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

Series B Convertible Preferred Stock

(1)

05/17/2018

M

400

(1)

(1)

Common Stock

126,985

$ 0

0

D

Series B Convertible Preferred Stock

(1)

05/17/2018

M

400

(1)

(1)

Common Stock

126,985

$ 0

0

I

By Porcupine Investment Partners, LLC

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Berkowitz Mortimer III C/O ALPHATEC SPINE, INC. 5818 EL CAMINO REAL CARLSBAD, CA 92008	X

Signatures

/s/ Tyson E. Marshall by power of attorney		05/21/2018
**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)	Each share of Series B Convertible Preferred Stock had no expiration date and converted into 317.4603 shares of the issuer's common stock on May 17, 2018, the date that issuer's stockholders approved such conversion.
(2)	Includes shares owned by Reporting Person and shares owned by Reporting Person's spouse.
(3)	Reporting Person is a managing member of HGP, LLC, which is the general partner of HealthpointCapital Partners, L.P. In addition, Reporting Person is a managing member of HGP II, LLC, which is the general partner of HealthpointCapital Partners II, L.P. As such, Reporting Person may be deemed to beneficially own the securities held by HealthpointCapital Partners, L.P. and HealthpointCapital Partners II, L.P. Reporting Person, however, disclaims beneficial ownership of such shares, except to the extent of his indirect pecuniary interest therein.

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