<SEC-DOCUMENT>0001104659-18-071885.txt : 20181207
<SEC-HEADER>0001104659-18-071885.hdr.sgml : 20181207
<ACCEPTANCE-DATETIME>20181207183610
ACCESSION NUMBER:		0001104659-18-071885
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20181204
FILED AS OF DATE:		20181207
DATE AS OF CHANGE:		20181207

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lee Howard
		CENTRAL INDEX KEY:			0001379941

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36509
		FILM NUMBER:		181224563

	MAIL ADDRESS:	
		STREET 1:		13F-2, NO. 36, LANE 48, SECTION 3
		STREET 2:		NAN-JING EAST ROAD
		CITY:			TAIPEI, TAIWAN
		STATE:			F4
		ZIP:			00000

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Amphastar Pharmaceuticals, Inc.
		CENTRAL INDEX KEY:			0001297184
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				330702205
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		11570 SIXTH STREET
		CITY:			RANCHO CUCAMONGA
		STATE:			CA
		ZIP:			91730
		BUSINESS PHONE:		909-980-9484

	MAIL ADDRESS:	
		STREET 1:		11570 SIXTH STREET
		CITY:			RANCHO CUCAMONGA
		STATE:			CA
		ZIP:			91730
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>4
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        <issuerTradingSymbol>AMPH</issuerTradingSymbol>
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            <rptOwnerState>CA</rptOwnerState>
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                </transactionShares>
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                    <value>5794</value>
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            <transactionDate>
                <value>2018-12-04</value>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                <value></value>
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                <transactionShares>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
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                <value>2018-12-20</value>
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    </derivativeTable>

    <footnotes>
        <footnote id="F1">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.40 to $22.35, 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 footnotes (1), (2), (3), (4) and (5) to this Form 4.</footnote>
        <footnote id="F2">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.44 to $22.65, inclusive.</footnote>
        <footnote id="F3">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.80 to $21.05, inclusive.</footnote>
        <footnote id="F4">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.08 to $21.72, inclusive.</footnote>
        <footnote id="F5">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.59 to $22.21, inclusive.</footnote>
        <footnote id="F6">Shares subject to the option are fully vested and immediately exercisable.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Eva Wen, by power of attorney</signatureName>
        <signatureDate>2018-12-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
