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        <com:street2>SUITE 1200</com:street2>
        <com:city>SEATTLE</com:city>
        <com:stateOrCountry>WA</com:stateOrCountry>
        <com:zipCode>98109</com:zipCode>
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      <issuerContactPhone>206-517-5300</issuerContactPhone>
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      <relationshipsToIssuer>
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      <brokerOrMarketmakerDetails>
        <name>Charles Schwab &amp; Co., Inc.</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
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      <aggregateMarketValue>1493270.00</aggregateMarketValue>
      <noOfUnitsOutstanding>26157089</noOfUnitsOutstanding>
      <approxSaleDate>02/27/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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      <acquiredDate>02/27/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Lapse - See Remarks</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>IMPINJ, INC.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
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      <paymentDate>02/27/2023</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
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          <com:street1>400 Fairview Avenue North, Suite 1200</com:street1>
          <com:city>Seattle</com:city>
          <com:stateOrCountry>WA</com:stateOrCountry>
          <com:zipCode>98109</com:zipCode>
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      <saleDate>01/04/2023</saleDate>
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      <saleDate>01/13/2023</saleDate>
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          <com:zipCode>98109</com:zipCode>
        </address>
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      <securitiesClassTitle>IMPINJ, INC.</securitiesClassTitle>
      <saleDate>02/10/2023</saleDate>
      <amountOfSecuritiesSold>5000</amountOfSecuritiesSold>
      <grossProceeds>604998.00</grossProceeds>
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        <name>CHRIS DIORIO</name>
        <address>
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          <com:stateOrCountry>WA</com:stateOrCountry>
          <com:zipCode>98109</com:zipCode>
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        <name>CHRIS DIORIO</name>
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          <com:stateOrCountry>WA</com:stateOrCountry>
          <com:zipCode>98109</com:zipCode>
        </address>
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      <securitiesClassTitle>IMPINJ, INC.</securitiesClassTitle>
      <saleDate>02/14/2023</saleDate>
      <amountOfSecuritiesSold>5000</amountOfSecuritiesSold>
      <grossProceeds>629138.00</grossProceeds>
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      <sellerDetails>
        <name>CHRIS DIORIO</name>
        <address>
          <com:street1>400 Fairview Avenue North, Suite 1200</com:street1>
          <com:city>Seattle</com:city>
          <com:stateOrCountry>WA</com:stateOrCountry>
          <com:zipCode>98109</com:zipCode>
        </address>
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      <securitiesClassTitle>IMPINJ, INC.</securitiesClassTitle>
      <saleDate>02/21/2023</saleDate>
      <amountOfSecuritiesSold>5000</amountOfSecuritiesSold>
      <grossProceeds>623946.00</grossProceeds>
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        <name>CHRIS DIORIO</name>
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      <saleDate>02/22/2023</saleDate>
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      <grossProceeds>616206.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>Shares sold to cover tax obligation from settlement of vested Restricted Stock Units.</remarks>
    <noticeSignature>
      <noticeDate>02/27/2023</noticeDate>
      <signature>CHRIS DIORIO</signature>
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144
0001677721
XXXXXXXX
LIVE
0001114995
IMPINJ INC
001-37824
400 FAIRVIEW AVENUE NORTH
SUITE 1200
SEATTLE
WA
98109
206-517-5300
DIORIO CHRIS PH.D.
Officer
Common
Charles Schwab & Co., Inc.
3000 Schwab Way
Westlake
TX
76262
11692
1493270.00
26157089
02/27/2023
NASDAQ
Common
02/27/2023
Restricted Stock Lapse - See Remarks
IMPINJ, INC.
N
11692
02/27/2023
Equity Compensation
N
CHRIS DIORIO
400 Fairview Avenue North, Suite 1200
Seattle
WA
98109
IMPINJ, INC.
12/16/2022
612
67191.00
CHRIS DIORIO
400 Fairview Avenue North, Suite 1200
Seattle
WA
98109
IMPINJ, INC.
01/04/2023
1612
176891.00
CHRIS DIORIO
400 Fairview Avenue North, Suite 1200
Seattle
WA
98109
IMPINJ, INC.
01/13/2023
1226
147802.00
CHRIS DIORIO
400 Fairview Avenue North, Suite 1200
Seattle
WA
98109
IMPINJ, INC.
02/10/2023
5000
604998.00
CHRIS DIORIO
400 Fairview Avenue North, Suite 1200,
Seattle
WA
98109
IMPINJ, INC.
02/13/2023
5000
631744.00
CHRIS DIORIO
CHRIS DIORIO 400 Fairview Avenue North,
Seattle
WA
98109
IMPINJ, INC.
02/14/2023
5000
629138.00
CHRIS DIORIO
400 Fairview Avenue North, Suite 1200
Seattle
WA
98109
IMPINJ, INC.
02/21/2023
5000
623946.00
CHRIS DIORIO
400 Fairview Avenue North, Suite 1200
Seattle
WA
98109
IMPINJ, INC.
02/22/2023
5000
616206.00
Shares sold to cover tax obligation from settlement of vested Restricted Stock Units.
02/27/2023
CHRIS DIORIO