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    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001897662</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001446847</issuerCik>
      <issuerName>IRONWOOD PHARMACEUTICALS INC</issuerName>
      <secFileNumber>001-34620</secFileNumber>
      <issuerAddress>
        <com:street1>100 SUMMER STREET, SUITE 2300</com:street1>
        <com:city>BOSTON</com:city>
        <com:stateOrCountry>MA</com:stateOrCountry>
        <com:zipCode>02110</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>617-621-7722</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Emany Sravan Kumar</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>E Trade Securities LLC</name>
        <address>
          <com:street1>3 Edison Drive</com:street1>
          <com:city>Alpharetta</com:city>
          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30005</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>12500</noOfUnitsSold>
      <aggregateMarketValue>51375.00</aggregateMarketValue>
      <noOfUnitsOutstanding>160028388</noOfUnitsOutstanding>
      <approxSaleDate>11/18/2024</approxSaleDate>
      <securitiesExchangeName>Nasdaq</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
      <acquiredDate>12/06/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Unit award granted pursuant to the Issuer's 2019 Equity Incentive Plan, subject to vesting requirements</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Ironwood Pharmaceuticals, Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>21250</amountOfSecuritiesAcquired>
      <paymentDate>12/06/2021</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>Shares sold to cover taxes from the vesting of stock awards granted by the Issuer.</remarks>
    <noticeSignature>
      <noticeDate>11/15/2024</noticeDate>
      <signature>/s/ Sravan Emany</signature>
    </noticeSignature>
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144
0001897662
XXXXXXXX
LIVE
0001446847
IRONWOOD PHARMACEUTICALS INC
001-34620
100 SUMMER STREET, SUITE 2300
BOSTON
MA
02110
617-621-7722
Emany Sravan Kumar
Officer
Class A Common Stock
E Trade Securities LLC
3 Edison Drive
Alpharetta
GA
30005
12500
51375.00
160028388
11/18/2024
Nasdaq
Class A Common Stock
12/06/2021
Restricted Stock Unit award granted pursuant to the Issuer's 2019 Equity Incentive Plan, subject to vesting requirements
Ironwood Pharmaceuticals, Inc.
N
21250
12/06/2021
N/A
Y
Shares sold to cover taxes from the vesting of stock awards granted by the Issuer.
11/15/2024
/s/ Sravan Emany