<SEC-DOCUMENT>0001969223-24-000460.txt : 20240610
<SEC-HEADER>0001969223-24-000460.hdr.sgml : 20240610
<ACCEPTANCE-DATETIME>20240610165127
ACCESSION NUMBER:		0001969223-24-000460
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20240610
DATE AS OF CHANGE:		20240610

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Amphastar Pharmaceuticals, Inc.
		CENTRAL INDEX KEY:			0001297184
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				330702205
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-36509
		FILM NUMBER:		241033469

	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

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Petersen Floyd F.
		CENTRAL INDEX KEY:			0001611286
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		11570 6TH STREET
		CITY:			RANCHO CUCAMONGA
		STATE:			CA
		ZIP:			91730
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001611286</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001297184</issuerCik>
      <issuerName>Amphastar Pharmaceuticals Inc</issuerName>
      <secFileNumber>001-36509</secFileNumber>
      <issuerAddress>
        <com:street1>11570 SIXTH STREET</com:street1>
        <com:city>Rancho Cucamonga</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>91730</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>909-980-9484</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Floyd Petersen</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>UBS Financial Services Inc</name>
        <address>
          <com:street1>1000 Harbor Blvd</com:street1>
          <com:street2>3rd Floor</com:street2>
          <com:city>Weehawken</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>07086</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>3000</noOfUnitsSold>
      <aggregateMarketValue>120000</aggregateMarketValue>
      <noOfUnitsOutstanding>48900000</noOfUnitsOutstanding>
      <approxSaleDate>06/10/2024</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>05/18/2022</acquiredDate>
      <natureOfAcquisitionTransaction>ESOP</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>3000</amountOfSecuritiesAcquired>
      <paymentDate>05/18/2022</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Floyd Petersen</name>
        <address>
          <com:street1> 25589 State St</com:street1>
          <com:city>Loma Linda</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>92354</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>04/01/2024</saleDate>
      <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
      <grossProceeds>21693</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Floyd Petersen</name>
        <address>
          <com:street1> 25589 State St</com:street1>
          <com:city>Loma Linda</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>92354</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/01/2024</saleDate>
      <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
      <grossProceeds>20816</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Floyd Petersen</name>
        <address>
          <com:street1> 25589 State St</com:street1>
          <com:city>Loma Linds</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>92354</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>06/01/2024</saleDate>
      <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
      <grossProceeds>21305</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>06/10/2024</noticeDate>
      <signature>/s/ UBS Financial Services Inc, as attorney-in-fact for Floyd Petersen</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
