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      <liveTestFlag>LIVE</liveTestFlag>



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      <issuerCik>0000356037</issuerCik>
      <issuerName>CSP INC /MA/</issuerName>
      <secFileNumber>000-10843</secFileNumber>
      <issuerAddress>
        <com:street1>175 CABOT STREET</com:street1>
        <com:street2>SUITE 210</com:street2>
        <com:city>LOWELL</com:city>
        <com:stateOrCountry>MA</com:stateOrCountry>
        <com:zipCode>01854</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>9789545038</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Blackmon Raymond Charles JR</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Retired Director</relationshipToIssuer>
      </relationshipsToIssuer>
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    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab &amp; Co.</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>60000</noOfUnitsSold>
      <aggregateMarketValue>1208994.00</aggregateMarketValue>
      <noOfUnitsOutstanding>9882613</noOfUnitsOutstanding>
      <approxSaleDate>02/18/2025</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>02/11/2019</acquiredDate>
      <natureOfAcquisitionTransaction>Equity Grants</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>60000</amountOfSecuritiesAcquired>
      <paymentDate>02/11/2019</paymentDate>
      <natureOfPayment>Services Rendered</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Raymond Charles Blackmon, JR</name>
        <address>
          <com:street1>175 CABOT STREET, SUITE 210</com:street1>
          <com:city>Lowell</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01854</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>02/12/2025</saleDate>
      <amountOfSecuritiesSold>20670</amountOfSecuritiesSold>
      <grossProceeds>417058.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Raymond Charles Blackmon, JR</name>
        <address>
          <com:street1>175 CABOT STREET, SUITE 210</com:street1>
          <com:city>Lowell</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01854</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>02/13/2025</saleDate>
      <amountOfSecuritiesSold>15830</amountOfSecuritiesSold>
      <grossProceeds>302600.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Raymond Chalres Blackmon, JR</name>
        <address>
          <com:street1>175 CABOT STREET, SUITE 210</com:street1>
          <com:city>Lowell</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01854</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>02/14/2025</saleDate>
      <amountOfSecuritiesSold>2000</amountOfSecuritiesSold>
      <grossProceeds>37050.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>Shares to be sold were Equity Grants awarded to members of the Board and were acquired between 2/11/2019-2/7/2024 Shares to be sold from THE RAYMOND AND KIM BLACKMON Living Trust</remarks>
    <noticeSignature>
      <noticeDate>02/18/2025</noticeDate>
      <signature>Raymond Charles Blackmon Jr</signature>
    </noticeSignature>
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144
0001582548
XXXXXXXX
LIVE
0000356037
CSP INC /MA/
000-10843
175 CABOT STREET
SUITE 210
LOWELL
MA
01854
9789545038
Blackmon Raymond Charles JR
Retired Director
Common Stock
Charles Schwab & Co.
3000 Schwab Way
Westlake
TX
76262
60000
1208994.00
9882613
02/18/2025
NASDAQ
Common Stock
02/11/2019
Equity Grants
Issuer
N
60000
02/11/2019
Services Rendered
N
Raymond Charles Blackmon, JR
175 CABOT STREET, SUITE 210
Lowell
MA
01854
Common Stock
02/12/2025
20670
417058.00
Raymond Charles Blackmon, JR
175 CABOT STREET, SUITE 210
Lowell
MA
01854
Common Stock
02/13/2025
15830
302600.00
Raymond Chalres Blackmon, JR
175 CABOT STREET, SUITE 210
Lowell
MA
01854
Common Stock
02/14/2025
2000
37050.00
Shares to be sold were Equity Grants awarded to members of the Board and were acquired between 2/11/2019-2/7/2024 Shares to be sold from THE RAYMOND AND KIM BLACKMON Living Trust
02/18/2025
Raymond Charles Blackmon Jr