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        <issuerContactPhone>206-701-7914</issuerContactPhone>
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          <relationshipToIssuer>Affiliate</relationshipToIssuer>
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            <com:street1>390 Madison Avenue</com:street1>
            <com:street2>6th Floor</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
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        <securitiesExchangeName>Nasdaq</securitiesExchangeName>
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            <com:stateOrCountry>WA</com:stateOrCountry>
            <com:zipCode>98102</com:zipCode>
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        <grossProceeds>257469</grossProceeds>
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          <name>FLAGSHIP VENTURES FUND V, L.P.</name>
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            <com:zipCode>98102</com:zipCode>
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        <saleDate>06/06/2023</saleDate>
        <amountOfSecuritiesSold>22297</amountOfSecuritiesSold>
        <grossProceeds>140607</grossProceeds>
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      <noticeSignature>
        <noticeDate>06/07/2023</noticeDate>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Flagship V Venturelabs RX Fund, L.P.</signature>
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text: 144
  0001724939
  XXXXXXXX
  LIVE
  0001770121
  Sana Biotechnology
  001-39941
  188 East Blaine St, Ste 400
  Seattle
  WA
  98102
  206-701-7914
  Flagship V Venturelabs RX Fund, L.P.
  Affiliate
  Common
  J.P. Morgan Securities LLC
  390 Madison Avenue
  6th Floor
  New York
  NY
  10017
  39830
  254514
  191500944
  06/07/2023
  Nasdaq
  Common
  05/12/2017
  Venture Capital Investment
  Issuer
  N
  39830
  05/12/2017
  Cash
  N
  FLAGSHIP VENTURES FUND V, L.P.
  188 East Blaine St, Ste 400
  Seattle
  WA
  98102
  Common
  05/24/2023
  39580
  257469
  FLAGSHIP VENTURES FUND V, L.P.
  188 East Blaine St, Ste 400
  Seattle
  WA
  98102
  Common
  05/25/2023
  13127
  82724
  FLAGSHIP VENTURES FUND V, L.P.
  188 East Blaine St, Ste 400
  Seattle
  WA
  98102
  Common
  05/26/2023
  9330
  57621
  FLAGSHIP VENTURES FUND V, L.P.
  188 East Blaine St, Ste 400
  Seattle
  WA
  98102
  Common
  06/06/2023
  22297
  140607
  06/07/2023
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Flagship V Venturelabs RX Fund, L.P.