<SEC-DOCUMENT>0001085146-25-001357.txt : 20250213
<SEC-HEADER>0001085146-25-001357.hdr.sgml : 20250213
<ACCEPTANCE-DATETIME>20250213182420
ACCESSION NUMBER:		0001085146-25-001357
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250213
DATE AS OF CHANGE:		20250213

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIBROGEN INC
		CENTRAL INDEX KEY:			0000921299
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-88653
		FILM NUMBER:		25622196

	BUSINESS ADDRESS:	
		STREET 1:		350 BAY STREET
		STREET 2:		SUITE 100 #6009
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133
		BUSINESS PHONE:		415-978-1200

	MAIL ADDRESS:	
		STREET 1:		350 BAY STREET
		STREET 2:		SUITE 100 #6009
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PRIMECAP MANAGEMENT CO/CA/
		CENTRAL INDEX KEY:			0000763212
		ORGANIZATION NAME:           	
		IRS NUMBER:				953868081

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		177 EAST COLORADO BLVD.
		STREET 2:		11TH FLOOR
		CITY:			PASADENA
		STATE:			CA
		ZIP:			91105
		BUSINESS PHONE:		6263049222

	MAIL ADDRESS:	
		STREET 1:		177 EAST COLORADO BLVD.
		STREET 2:		11TH FLOOR
		CITY:			PASADENA
		STATE:			CA
		ZIP:			91105
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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  <headerData>
    <submissionType>SCHEDULE 13G/A</submissionType>
    <previousAccessionNumber>0001085146-24-005550</previousAccessionNumber>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0000763212</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



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  </headerData>
  <formData>
    <coverPageHeader>
      <amendmentNo>7</amendmentNo>
      <securitiesClassTitle>COM</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>12/31/2024</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0000921299</issuerCik>
        <issuerName>FibroGen, Inc.</issuerName>
        <issuerCusip>31572Q808</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <ns1:street1>409 Illinois Street</ns1:street1>
          <ns1:city>San Francisco</ns1:city>
          <ns1:stateOrCountry>CA</ns1:stateOrCountry>
          <ns1:zipCode>94158</ns1:zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
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      <reportingPersonName>PRIMECAP MANAGEMENT CO/CA/</reportingPersonName>
      <citizenshipOrOrganization>X1</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>4065630</soleVotingPower>
        <sharedVotingPower>0</sharedVotingPower>
        <soleDispositivePower>4616130</soleDispositivePower>
        <sharedDispositivePower>0</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>4616130</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>4.58</classPercent>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>FibroGen, Inc.</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>409 Illinois Street
San Francisco, CALIFORNIA
94158</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>PRIMECAP MANAGEMENT CO/CA/</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>177 EAST COLORADO BLVD.
11TH FLOOR
PASADENA, California
91105</principalBusinessOfficeOrResidenceAddress>
        <citizenship>PRIMECAP MANAGEMENT CO/CA/ - UNITED STATES</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>N</notApplicableFlag>
        <typeOfPersonFiling>IA</typeOfPersonFiling>
      </item3>
      <item4>
        <amountBeneficiallyOwned>4,616,130</amountBeneficiallyOwned>
        <classPercent>4.58</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>PRIMECAP MANAGEMENT CO/CA/ - 4,065,630</solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>PRIMECAP MANAGEMENT CO/CA/ - 0</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>PRIMECAP MANAGEMENT CO/CA/ - 4,616,130</solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>PRIMECAP MANAGEMENT CO/CA/ - 0</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>N</notApplicableFlag>
        <classOwnership5PercentOrLess>Y</classOwnership5PercentOrLess>
      </item5>
      <item6>
        <notApplicableFlag>Y</notApplicableFlag>
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        <notApplicableFlag>Y</notApplicableFlag>
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        <notApplicableFlag>Y</notApplicableFlag>
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      <item9>
        <notApplicableFlag>Y</notApplicableFlag>
      </item9>
      <item10>
        <notApplicableFlag>N</notApplicableFlag>
        <certifications>By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.</certifications>
      </item10>
    </items>
    <signatureInformation>
      <reportingPersonName>PRIMECAP MANAGEMENT CO/CA/</reportingPersonName>
      <signatureDetails>
        <signature>Jorge A. Rodriguez</signature>
        <title>Deputy Chief Compliance Officer</title>
        <date>02/13/2025</date>
      </signatureDetails>
    </signatureInformation>
  </formData>
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</SEC-DOCUMENT>
