<SEC-DOCUMENT>0000874015-24-000091.txt : 20240202
<SEC-HEADER>0000874015-24-000091.hdr.sgml : 20240202
<ACCEPTANCE-DATETIME>20240202172820
ACCESSION NUMBER:		0000874015-24-000091
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20240202
DATE AS OF CHANGE:		20240202

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IONIS PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0000874015
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				330336973
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	000-19125
		FILM NUMBER:		24592925

	BUSINESS ADDRESS:	
		STREET 1:		2855 GAZELLE COURT
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92010
		BUSINESS PHONE:		7609319200

	MAIL ADDRESS:	
		STREET 1:		2855 GAZELLE COURT
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92010

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ISIS PHARMACEUTICALS INC
		DATE OF NAME CHANGE:	19930328

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Geary Richard S
		CENTRAL INDEX KEY:			0001442730
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		2855 GAZELLE COURT
		STREET 2:		2855 GAZELLE COURT
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92010
</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>0001442730</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000874015</issuerCik>
      <issuerName>IONIS PHARMACEUTICALS INC</issuerName>
      <secFileNumber>000-19125</secFileNumber>
      <issuerAddress>
        <com:street1>2855 GAZELLE COURT</com:street1>
        <com:city>CARLSBAD</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>92010</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>7609319200</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Geary Richard S</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Morgan Stanley Smith Barney</name>
        <address>
          <com:street1>1585 Broadway</com:street1>
          <com:city>New York</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10036</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>1961</noOfUnitsSold>
      <aggregateMarketValue>98134.98</aggregateMarketValue>
      <noOfUnitsOutstanding>143472119</noOfUnitsOutstanding>
      <approxSaleDate>02/02/2024</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/01/2024</acquiredDate>
      <natureOfAcquisitionTransaction>PSUs granted under the 2011 Equity Incentive Plan</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Ionis Pharmaceuticals, Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1961</amountOfSecuritiesAcquired>
      <paymentDate>02/01/2024</paymentDate>
      <natureOfPayment>Sevices rendered</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Insight Securities, Inc.</name>
        <address>
          <com:street1>600 Central</com:street1>
          <com:street2>STE 293</com:street2>
          <com:city>Highland Park</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60035</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>12/14/2023</saleDate>
      <amountOfSecuritiesSold>10613</amountOfSecuritiesSold>
      <grossProceeds>526236.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Insight Securities, Inc.</name>
        <address>
          <com:street1>600 Central</com:street1>
          <com:street2>STE 293</com:street2>
          <com:city>Highland Park</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60035</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>12/20/2023</saleDate>
      <amountOfSecuritiesSold>6500</amountOfSecuritiesSold>
      <grossProceeds>322643.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Insight Securities, Inc.</name>
        <address>
          <com:street1>600 Central</com:street1>
          <com:street2>STE 293</com:street2>
          <com:city>Highland Park</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60035</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>12/21/2023</saleDate>
      <amountOfSecuritiesSold>4112</amountOfSecuritiesSold>
      <grossProceeds>202681.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Morgan Stanley Smith Barney</name>
        <address>
          <com:street1>1585 Broadway</com:street1>
          <com:city>New York</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10036</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common stock</securitiesClassTitle>
      <saleDate>01/17/2024</saleDate>
      <amountOfSecuritiesSold>4497</amountOfSecuritiesSold>
      <grossProceeds>226725.24</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>02/02/2024</noticeDate>
      <signature>Richard S. Geary</signature>
    </noticeSignature>
  </formData>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
