SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Hunsaker Craig E (Last) (First) (Middle) C/O ALPHATEC SPINE, INC. 5818 EL CAMINO REAL (Street) CARLSBAD CA 92008 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Alphatec Holdings, Inc. [ ATEC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) EVP, People/Culture & GC
	3. Date of Earliest Transaction (Month/Day/Year) 05/13/2019
	4. If Amendment, Date of 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

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	05/13/2019(1)		A		228,078(1)(3)	A	$0	854,092(1)(3)	D
Common Stock	05/13/2019(2)		A		57,020(2)(3)	A	$0	911,112(2)(3)	D
Common Stock	05/15/2019		S(4)		50,000	D	$4.5(5)	861,112	D

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. On May 13, 2019, issuer granted to the reporting person 228,078 restricted stock units, subject to stockholder approval of an amendment to issuer's 2016 Equity Incentive Plan to increase the number of shares authorized for issuance under the plan by 4,000,000 shares. The restricted stock units vest in four equal installments on each of the first four anniversaries of the grant date; provided, however, that no portion of the restricted stock units shall vest at any time during the first four years following the grant date unless and until the publicly-traded stock price for the issuer's common stock reaches a 30-day average trading price equal to or above $5.36 per share (representing a 30% increase in the price per share as of the grant date). Should the publicly traded stock price for the issuer's common stock reach a 30-day average trading price at or above $5.36 per share, this pricing condition on the vesting of the restricted stock units shall be satisfied, and shall terminate.

2. On May 13, 2019, issuer granted to the reporting person 57,020 restricted stock units, subject to stockholder approval of an amendment to issuer's 2016 Equity Incentive Plan to increase the number of shares authorized for issuance under the plan by 4,000,000 shares. The restricted stock units vest on the fourth anniversary of grant date; provided, however, that no portion of such restricted stock units shall vest unless the publicly-traded stock price for the issuer's common stock at the close of the market on such fourth anniversary date is equal to or greater than $6.18 per share (representing a 50% increase in the price per share as of the grant date).

3. Each restricted stock unit represents a contingent right to receive one share of issuer's common stock.

4. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 12, 2019.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.50 to $4.505, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

	/s/ Craig E. Hunsaker	05/14/2019
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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