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        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001941085</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



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        <issuerInfo>
            <issuerCik>0000917273</issuerCik>
            <issuerName>RAMBUS INC.</issuerName>
            <secFileNumber>000-22339</secFileNumber>
            <issuerAddress>
                <ns2:street1>4453 North First Street</ns2:street1>
                <ns2:street2>Suite 100</ns2:street2>
                <ns2:city>San Jose</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>95134</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(408) 462-8000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>DESMOND M LYNCH</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>3118</noOfUnitsSold>
            <aggregateMarketValue>156866.58</aggregateMarketValue>
            <noOfUnitsOutstanding>107445874</noOfUnitsOutstanding>
            <approxSaleDate>05/05/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/01/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1024</amountOfSecuritiesAcquired>
            <paymentDate>02/01/2024</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/02/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2094</amountOfSecuritiesAcquired>
            <paymentDate>03/02/2024</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DESMOND M LYNCH</name>
                <address>
                    <ns2:street1>4453 North First Street</ns2:street1>
                    <ns2:street2>Suite 100</ns2:street2>
                    <ns2:city>San Jose</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>95134</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>03/14/2025</saleDate>
            <amountOfSecuritiesSold>83</amountOfSecuritiesSold>
            <grossProceeds>4421.41</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DESMOND M LYNCH</name>
                <address>
                    <ns2:street1>4453 North First Street</ns2:street1>
                    <ns2:street2>Suite 100</ns2:street2>
                    <ns2:city>San Jose</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>95134</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>03/14/2025</saleDate>
            <amountOfSecuritiesSold>380</amountOfSecuritiesSold>
            <grossProceeds>20242.60</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DESMOND M LYNCH</name>
                <address>
                    <ns2:street1>4453 North First Street</ns2:street1>
                    <ns2:street2>Suite 100</ns2:street2>
                    <ns2:city>San Jose</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>95134</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>03/14/2025</saleDate>
            <amountOfSecuritiesSold>3280</amountOfSecuritiesSold>
            <grossProceeds>174725.60</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>05/05/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>12/13/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Desmond Lynch</signature>
        </noticeSignature>
    </formData>
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144
0001941085
XXXXXXXX
LIVE
0000917273
RAMBUS INC.
000-22339
4453 North First Street
Suite 100
San Jose
CA
95134
(408) 462-8000
DESMOND M LYNCH
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
3118
156866.58
107445874
05/05/2025
NASDAQ
Common
02/01/2024
Restricted Stock
Issuer
N
1024
02/01/2024
Not Applicable
Common
03/02/2024
Restricted Stock
Issuer
N
2094
03/02/2024
Not Applicable
N
DESMOND M LYNCH
4453 North First Street
Suite 100
San Jose
CA
95134
Common
03/14/2025
83
4421.41
DESMOND M LYNCH
4453 North First Street
Suite 100
San Jose
CA
95134
Common
03/14/2025
380
20242.60
DESMOND M LYNCH
4453 North First Street
Suite 100
San Jose
CA
95134
Common
03/14/2025
3280
174725.60
05/05/2025
12/13/2024
/s/ Desmond Lynch