<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001865116</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001595974</issuerCik>
            <issuerName>MAGNITE, INC.</issuerName>
            <secFileNumber>001-36384</secFileNumber>
            <issuerAddress>
                <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                <ns2:city>New York</ns2:city>
                <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                <ns2:zipCode>10001</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(212) 243-2769</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>SEAN P BUCKLEY</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>5242</noOfUnitsSold>
            <aggregateMarketValue>78628.00</aggregateMarketValue>
            <noOfUnitsOutstanding>140690441</noOfUnitsOutstanding>
            <approxSaleDate>11/11/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/15/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>5242</amountOfSecuritiesAcquired>
            <paymentDate>08/15/2024</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>SEAN P BUCKLEY</name>
                <address>
                    <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10001</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>11/11/2024</saleDate>
            <amountOfSecuritiesSold>2623</amountOfSecuritiesSold>
            <grossProceeds>38033.50</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>SEAN P BUCKLEY</name>
                <address>
                    <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10001</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>11/11/2024</saleDate>
            <amountOfSecuritiesSold>2619</amountOfSecuritiesSold>
            <grossProceeds>40594.50</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>SEAN P BUCKLEY</name>
                <address>
                    <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10001</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>08/20/2024</saleDate>
            <amountOfSecuritiesSold>2623</amountOfSecuritiesSold>
            <grossProceeds>35410.50</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>SEAN P BUCKLEY</name>
                <address>
                    <ns2:street1>1250 Broadway, 15th Floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10001</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>08/19/2024</saleDate>
            <amountOfSecuritiesSold>2623</amountOfSecuritiesSold>
            <grossProceeds>32866.19</grossProceeds>
        </securitiesSoldInPast3Months>
        <remarks>Sales that were executed on November 11, 2024 are being reported on this Form 144 filed on November 12, 2024 given the EDGAR system was not accepting filings November 11, 2024 in observance of the federal holiday. </remarks>
        <noticeSignature>
            <noticeDate>11/12/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>11/24/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Sean Patrick Buckley</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
[{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 6341}]
144
0001865116
XXXXXXXX
LIVE
0001595974
MAGNITE, INC.
001-36384
1250 Broadway, 15th Floor
New York
NY
10001
(212) 243-2769
SEAN P BUCKLEY
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
5242
78628.00
140690441
11/11/2024
NASDAQ
Common
08/15/2024
Restricted Stock
Issuer
N
5242
08/15/2024
Not Applicable
N
SEAN P BUCKLEY
1250 Broadway, 15th Floor
New York
NY
10001
Common
11/11/2024
2623
38033.50
SEAN P BUCKLEY
1250 Broadway, 15th Floor
New York
NY
10001
Common
11/11/2024
2619
40594.50
SEAN P BUCKLEY
1250 Broadway, 15th Floor
New York
NY
10001
Common
08/20/2024
2623
35410.50
SEAN P BUCKLEY
1250 Broadway, 15th Floor
New York
NY
10001
Common
08/19/2024
2623
32866.19
Sales that were executed on November 11, 2024 are being reported on this Form 144 filed on November 12, 2024 given the EDGAR system was not accepting filings November 11, 2024 in observance of the federal holiday.
11/12/2024
11/24/2023
/s/ Sean Patrick Buckley