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  <city xmlns="http://www.sec.gov/edgar/common">Cambridge</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">MA</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">02140</zipCode>
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  <issuerContactPhone>617-613-6000</issuerContactPhone>
  <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Steven P. Peltzman</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
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  <relationshipToIssuer>Former officer</relationshipToIssuer>
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  <brokerOrMarketmakerDetails>
  <name>Robert W. Baird &amp; Co. Incorporated</name>
  <address>
  <street1 xmlns="http://www.sec.gov/edgar/common">777 East Wisconsin Avenue</street1>
  <city xmlns="http://www.sec.gov/edgar/common">Milwaukee</city>
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  <zipCode xmlns="http://www.sec.gov/edgar/common">53202</zipCode>
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  <aggregateMarketValue>404065</aggregateMarketValue>
  <noOfUnitsOutstanding>19164090</noOfUnitsOutstanding>
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  <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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  <securitiesClassTitle>Common Stock</securitiesClassTitle>
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  <nameOfPersonfromWhomAcquired>Forrester Research, Inc.</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>8</amountOfSecuritiesAcquired>
  <paymentDate>06/07/2016</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
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  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>08/04/2016</acquiredDate>
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  <nameOfPersonfromWhomAcquired>Forrester Research, Inc.</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>723</amountOfSecuritiesAcquired>
  <paymentDate>08/04/2016</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
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  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>08/05/2016</acquiredDate>
  <natureOfAcquisitionTransaction>Restricted stock units granted 08/03/2015</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Forrester Research, Inc.</nameOfPersonfromWhomAcquired>
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  <amountOfSecuritiesAcquired>657</amountOfSecuritiesAcquired>
  <paymentDate>08/05/2016</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
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  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>05/24/2017</acquiredDate>
  <natureOfAcquisitionTransaction>Stock options granted 08/03/15</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Forrester Research, Inc.</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>1030</amountOfSecuritiesAcquired>
  <paymentDate>05/24/2017</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
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  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>06/05/2017</acquiredDate>
  <natureOfAcquisitionTransaction>Restricted stock units granted 06/03/2013</natureOfAcquisitionTransaction>
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  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>460</amountOfSecuritiesAcquired>
  <paymentDate>06/05/2017</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
  </securitiesToBeSold>
  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>08/07/2017</acquiredDate>
  <natureOfAcquisitionTransaction>Restricted stock units granted 08/03/2015</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Forrester Research, Inc.</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>349</amountOfSecuritiesAcquired>
  <paymentDate>08/07/2017</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
  </securitiesToBeSold>
  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>08/05/2019</acquiredDate>
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  <amountOfSecuritiesAcquired>644</amountOfSecuritiesAcquired>
  <paymentDate>08/05/2019</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
  </securitiesToBeSold>
  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>08/04/2020</acquiredDate>
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  <nameOfPersonfromWhomAcquired>Forrester Research, Inc.</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>4163</amountOfSecuritiesAcquired>
  <paymentDate>08/04/2020</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
  </securitiesToBeSold>
  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>08/03/2021</acquiredDate>
  <natureOfAcquisitionTransaction>Restricted stock units granted 08/01/2018</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Forrester Research, Inc.</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>885</amountOfSecuritiesAcquired>
  <paymentDate>08/03/2021</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
  </securitiesToBeSold>
  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>08/01/2022</acquiredDate>
  <natureOfAcquisitionTransaction>Restricted stock units granted 08/01/2018, 08/01/2019, 08/03/2020 and 08/02/2021</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Forrester Research, Inc.</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>4205</amountOfSecuritiesAcquired>
  <paymentDate>08/01/2022</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
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  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>03/01/2023</acquiredDate>
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  <amountOfSecuritiesAcquired>767</amountOfSecuritiesAcquired>
  <paymentDate>03/01/2023</paymentDate>
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  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
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  <amountOfSecuritiesAcquired>3190</amountOfSecuritiesAcquired>
  <paymentDate>08/01/2023</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
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  <securitiesToBeSold>
  <securitiesClassTitle>Common Stock</securitiesClassTitle>
  <acquiredDate>03/01/2024</acquiredDate>
  <natureOfAcquisitionTransaction>Restricted stock units granted 03/01/2022 and 03/01/2023</natureOfAcquisitionTransaction>
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  <amountOfSecuritiesAcquired>2046</amountOfSecuritiesAcquired>
  <paymentDate>08/05/2024</paymentDate>
  <natureOfPayment>Stock-based compensation</natureOfPayment>
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  <noticeSignature>
  <noticeDate>09/03/2024</noticeDate>
  <signature>Ryan Darrah, as attorney-in-fact for Steven P. Peltzman</signature>
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text: 144
  0001530736
  XXXXXXXX
  LIVE
  0001023313
  FORRESTER RESEARCH, INC.
  000-21433
  60 Acorn Park Drive
  Cambridge
  MA
  02140
  617-613-6000
  Steven P. Peltzman
  Former officer
  Common Stock
  Robert W. Baird & Co. Incorporated
  777 East Wisconsin Avenue
  Milwaukee
  WI
  53202
  21067
  404065
  19164090
  09/03/2024
  NASDAQ
  Common Stock
  06/07/2016
  Restricted stock units granted 06/03/2013
  Forrester Research, Inc.
  N
  8
  06/07/2016
  Stock-based compensation
  Common Stock
  08/04/2016
  Restricted stock units granted 08/01/2014
  Forrester Research, Inc.
  N
  723
  08/04/2016
  Stock-based compensation
  Common Stock
  08/05/2016
  Restricted stock units granted 08/03/2015
  Forrester Research, Inc.
  N
  657
  08/05/2016
  Stock-based compensation
  Common Stock
  05/24/2017
  Stock options granted 08/03/15
  Forrester Research, Inc.
  N
  1030
  05/24/2017
  Stock-based compensation
  Common Stock
  06/05/2017
  Restricted stock units granted 06/03/2013
  Forrester Research, Inc.
  N
  460
  06/05/2017
  Stock-based compensation
  Common Stock
  08/07/2017
  Restricted stock units granted 08/03/2015
  Forrester Research, Inc.
  N
  349
  08/07/2017
  Stock-based compensation
  Common Stock
  08/05/2019
  Restricted stock units granted 08/03/2015 and 08/01/2016
  Forrester Research, Inc.
  N
  644
  08/05/2019
  Stock-based compensation
  Common Stock
  08/04/2020
  Restricted stock units granted 08/01/2016, 08/01/2017, 08/01/2018 and 08/01/2019
  Forrester Research, Inc.
  N
  4163
  08/04/2020
  Stock-based compensation
  Common Stock
  08/03/2021
  Restricted stock units granted 08/01/2018
  Forrester Research, Inc.
  N
  885
  08/03/2021
  Stock-based compensation
  Common Stock
  08/01/2022
  Restricted stock units granted 08/01/2018, 08/01/2019, 08/03/2020 and 08/02/2021
  Forrester Research, Inc.
  N
  4205
  08/01/2022
  Stock-based compensation
  Common Stock
  03/01/2023
  Restricted stock units granted 03/01/2022
  Forrester Research, Inc.
  N
  767
  03/01/2023
  Stock-based compensation
  Common Stock
  08/01/2023
  Restricted stock units granted 08/01/2019 and 08/03/2020
  Forrester Research, Inc.
  N
  3190
  08/01/2023
  Stock-based compensation
  Common Stock
  03/01/2024
  Restricted stock units granted 03/01/2022 and 03/01/2023
  Forrester Research, Inc.
  N
  1940
  03/01/2024
  Stock-based compensation
  Common Stock
  08/05/2024
  Restricted stock units granted 08/03/2020 and 08/02/2021
  Forrester Research, Inc.
  N
  2046
  08/05/2024
  Stock-based compensation
  Y
  09/03/2024
  Ryan Darrah, as attorney-in-fact for Steven P. Peltzman