<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <!-- Generated by Workiva -->
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001605808</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001596532</issuerCik>
      <issuerName>Arista Networks, Inc.</issuerName>
      <secFileNumber>001-36468</secFileNumber>
      <issuerAddress>
        <com:street1>5453 Great America Parkway</com:street1>
        <com:city>Santa Clara</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>95054</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>408-547-5500</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Kenneth Duda</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>J.P. Morgan Securities LLC</name>
        <address>
          <com:street1>270 Park Avenue - 10th Floor</com:street1>
          <com:city>New York</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10017</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>24000</noOfUnitsSold>
      <aggregateMarketValue>3248400</aggregateMarketValue>
      <noOfUnitsOutstanding>1256537906</noOfUnitsOutstanding>
      <approxSaleDate>03/17/2026</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/27/2025</acquiredDate>
      <natureOfAcquisitionTransaction>Grantor Annuity Trust distribution</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Kenneth and Jennifer Duda</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>24000</amountOfSecuritiesAcquired>
      <paymentDate>11/21/2022</paymentDate>
      <natureOfPayment>NA</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Kenneth Duda</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>12/17/2025</saleDate>
      <amountOfSecuritiesSold>30000</amountOfSecuritiesSold>
      <grossProceeds>3694674</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Kenneth Duda</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>01/20/2026</saleDate>
      <amountOfSecuritiesSold>30000</amountOfSecuritiesSold>
      <grossProceeds>3852969</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Kenneth Duda</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/17/2026</saleDate>
      <amountOfSecuritiesSold>32000</amountOfSecuritiesSold>
      <grossProceeds>4557939</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Molly Hsu-Mei Duda 2017 Trust</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>12/17/2025</saleDate>
      <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
      <grossProceeds>985246</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Molly Hsu-Mei Duda 2017 Trust</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>01/20/2026</saleDate>
      <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
      <grossProceeds>1027458</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Molly Hsu-Mei Duda 2017 Trust</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/17/2026</saleDate>
      <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
      <grossProceeds>1139484</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Sophie Hsu-Tsen Duda 2017 Trust</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>12/17/2025</saleDate>
      <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
      <grossProceeds>985246</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Sophie Hsu-Tsen Duda 2017 Trust</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>01/20/2026</saleDate>
      <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
      <grossProceeds>1027458</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Sophie Hsu-Tsen Duda 2017 Trust</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/17/2026</saleDate>
      <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
      <grossProceeds>1139484</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Foundation for Truth, Justice, and Compassion</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>12/17/2025</saleDate>
      <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
      <grossProceeds>1231558</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Foundation for Truth, Justice, and Compassion</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>01/20/2026</saleDate>
      <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
      <grossProceeds>1284323</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Foundation for Truth, Justice, and Compassion</name>
        <address>
          <com:street1>C/O Issuer</com:street1>
          <com:street2>5453 Great America Parkway</com:street2>
          <com:city>Santa Clara</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>95054</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/17/2026</saleDate>
      <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
      <grossProceeds>1424356</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>The shares filed for today will be sold by  Molly Hsu-Mei Duda 2017 Trust  - Kenneth Duda as Trustee. This filing is for Restricted Stock Units acquired by Kenneth Duda between November 30, 2010 and November 21, 2022.</remarks>
    <noticeSignature>
      <noticeDate>03/17/2026</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>03/13/2025</planAdoptionDate>
      </planAdoptionDates>
      <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Kenneth Duda</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>