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                    <ccc>XXXXXXXX</ccc>
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            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



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        <issuerInfo>
            <issuerCik>0001262039</issuerCik>
            <issuerName>FORTINET, INC.</issuerName>
            <secFileNumber>001-34511</secFileNumber>
            <issuerAddress>
                <ns2:street1>909 Kifer Road</ns2:street1>
                <ns2:city>Sunnyvale</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>94086</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>4082357700</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MICHAEL XIE</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
                <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>326784</noOfUnitsSold>
            <aggregateMarketValue>31384335.36</aggregateMarketValue>
            <noOfUnitsOutstanding>768974062</noOfUnitsOutstanding>
            <approxSaleDate>03/11/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>11/20/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Previously Exercised Stock Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>300000</amountOfSecuritiesAcquired>
            <paymentDate>11/20/2023</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/01/2025</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>16235</amountOfSecuritiesAcquired>
            <paymentDate>02/01/2025</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/01/2025</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>10549</amountOfSecuritiesAcquired>
            <paymentDate>02/01/2025</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>NYU Office of Gift Administration</name>
                <address>
                    <ns2:street1>115 5th Ave</ns2:street1>
                    <ns2:street2>5th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10003</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>02/28/2025</saleDate>
            <amountOfSecuritiesSold>935</amountOfSecuritiesSold>
            <grossProceeds>100119.80</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for KEN QING XIE</name>
                <address>
                    <ns2:street1>909 Kifer Road</ns2:street1>
                    <ns2:city>Sunnyvale</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94086</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>02/12/2025</saleDate>
            <amountOfSecuritiesSold>22721</amountOfSecuritiesSold>
            <grossProceeds>2422367.61</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for KEN QING XIE</name>
                <address>
                    <ns2:street1>909 Kifer Road</ns2:street1>
                    <ns2:city>Sunnyvale</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94086</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>02/11/2025</saleDate>
            <amountOfSecuritiesSold>22700</amountOfSecuritiesSold>
            <grossProceeds>2468699.91</grossProceeds>
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        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for KEN QING XIE</name>
                <address>
                    <ns2:street1>909 Kifer Road</ns2:street1>
                    <ns2:city>Sunnyvale</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94086</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>01/15/2025</saleDate>
            <amountOfSecuritiesSold>23044</amountOfSecuritiesSold>
            <grossProceeds>2150461.47</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for KEN QING XIE</name>
                <address>
                    <ns2:street1>909 Kifer Road</ns2:street1>
                    <ns2:city>Sunnyvale</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94086</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>01/14/2025</saleDate>
            <amountOfSecuritiesSold>23013</amountOfSecuritiesSold>
            <grossProceeds>2123333.57</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for KEN QING XIE</name>
                <address>
                    <ns2:street1>909 Kifer Road</ns2:street1>
                    <ns2:city>Sunnyvale</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94086</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>12/18/2024</saleDate>
            <amountOfSecuritiesSold>22928</amountOfSecuritiesSold>
            <grossProceeds>2188849.03</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for KEN QING XIE</name>
                <address>
                    <ns2:street1>909 Kifer Road</ns2:street1>
                    <ns2:city>Sunnyvale</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94086</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>12/17/2024</saleDate>
            <amountOfSecuritiesSold>22916</amountOfSecuritiesSold>
            <grossProceeds>2244140.96</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>03/11/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>12/10/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Michael Xie</signature>
        </noticeSignature>
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144
0001475586
XXXXXXXX
LIVE
0001262039
FORTINET, INC.
001-34511
909 Kifer Road
Sunnyvale
CA
94086
4082357700
MICHAEL XIE
Director
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
326784
31384335.36
768974062
03/11/2025
NASDAQ
Common
11/20/2023
Previously Exercised Stock Options
Issuer
N
300000
11/20/2023
Cash
Common
02/01/2025
Performance Stock Units
Issuer
N
16235
02/01/2025
N/A
Common
02/01/2025
Restricted Stock Units
Issuer
N
10549
02/01/2025
N/A
N
NYU Office of Gift Administration
115 5th Ave
5th Floor
New York
NY
10003
Common
02/28/2025
935
100119.80
10b5-1 Sales for KEN QING XIE
909 Kifer Road
Sunnyvale
CA
94086
Common
02/12/2025
22721
2422367.61
10b5-1 Sales for KEN QING XIE
909 Kifer Road
Sunnyvale
CA
94086
Common
02/11/2025
22700
2468699.91
10b5-1 Sales for KEN QING XIE
909 Kifer Road
Sunnyvale
CA
94086
Common
01/15/2025
23044
2150461.47
10b5-1 Sales for KEN QING XIE
909 Kifer Road
Sunnyvale
CA
94086
Common
01/14/2025
23013
2123333.57
10b5-1 Sales for KEN QING XIE
909 Kifer Road
Sunnyvale
CA
94086
Common
12/18/2024
22928
2188849.03
10b5-1 Sales for KEN QING XIE
909 Kifer Road
Sunnyvale
CA
94086
Common
12/17/2024
22916
2244140.96
03/11/2025
12/10/2024
/s/ Michael Xie