<SEC-DOCUMENT>0001179110-19-006128.txt : 20190515
<SEC-HEADER>0001179110-19-006128.hdr.sgml : 20190515
<ACCEPTANCE-DATETIME>20190515201233
ACCESSION NUMBER:		0001179110-19-006128
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190513
FILED AS OF DATE:		20190515
DATE AS OF CHANGE:		20190515

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Snider Brian
		CENTRAL INDEX KEY:			0001702383

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-52024
		FILM NUMBER:		19830354

	MAIL ADDRESS:	
		STREET 1:		5818 EL CAMINO REAL
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92008

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Alphatec Holdings, Inc.
		CENTRAL INDEX KEY:			0001350653
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				202463898
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5818 EL CAMINO REAL
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92008
		BUSINESS PHONE:		760-431-9286

	MAIL ADDRESS:	
		STREET 1:		5818 EL CAMINO REAL
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92008
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-05-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001350653</issuerCik>
        <issuerName>Alphatec Holdings, Inc.</issuerName>
        <issuerTradingSymbol>ATEC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001702383</rptOwnerCik>
            <rptOwnerName>Snider Brian</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ALPHATEC SPINE, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>5818 EL CAMINO REAL</rptOwnerStreet2>
            <rptOwnerCity>CARLBAD</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92008</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP, Strat. Mktg. &amp; Prod. Dev.</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-05-13</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>177340</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>342247</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-05-13</value>
                <footnoteId id="F2"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>44335</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>391102</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">On May 13, 2019, issuer granted to the reporting person 177,340 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.</footnote>
        <footnote id="F2">On May 13, 2019, issuer granted to the reporting person 44,335 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).</footnote>
        <footnote id="F3">Each restricted stock unit represents a contingent right to receive one share of issuer's common stock.</footnote>
        <footnote id="F4">Includes 4520 shares acquired under the issuer's employee stock purchase plan on May 15, 2019.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Brian R. Snider</signatureName>
        <signatureDate>2019-05-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
