<SEC-DOCUMENT>0001209191-20-019587.txt : 20200317
<SEC-HEADER>0001209191-20-019587.hdr.sgml : 20200317
<ACCEPTANCE-DATETIME>20200317162419
ACCESSION NUMBER:		0001209191-20-019587
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200313
FILED AS OF DATE:		20200317
DATE AS OF CHANGE:		20200317

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Gibson Daniel Patrick
		CENTRAL INDEX KEY:			0001745725

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37824
		FILM NUMBER:		20721302

	MAIL ADDRESS:	
		STREET 1:		400 FAIRVIEW AVENUE NORTH, SUITE 1200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98109

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Sylebra Capital Management, Ltd
		CENTRAL INDEX KEY:			0001745666
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37824
		FILM NUMBER:		20721303

	BUSINESS ADDRESS:	
		STREET 1:		INTERTRUST CORPORATE SERVICES (CAYMAN)
		STREET 2:		LIMITED, 190 ELGIN AVENUE
		CITY:			GEORGE TOWN
		STATE:			E9
		ZIP:			KY1-9005
		BUSINESS PHONE:		852 2147 3196

	MAIL ADDRESS:	
		STREET 1:		INTERTRUST CORPORATE SERVICES (CAYMAN)
		STREET 2:		LIMITED, 190 ELGIN AVENUE
		CITY:			GEORGE TOWN
		STATE:			E9
		ZIP:			KY1-9005

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Sylebra Capital Ltd
		CENTRAL INDEX KEY:			0001627436
		STATE OF INCORPORATION:			K3
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37824
		FILM NUMBER:		20721304

	BUSINESS ADDRESS:	
		STREET 1:		28 HENNESSY ROAD, 20TH FLOOR
		STREET 2:		WAN CHAI
		CITY:			HONG KONG
		STATE:			K3
		ZIP:			00000
		BUSINESS PHONE:		852-2191-2100

	MAIL ADDRESS:	
		STREET 1:		28 HENNESSY ROAD, 20TH FLOOR
		STREET 2:		WAN CHAI
		CITY:			HONG KONG
		STATE:			K3
		ZIP:			00000

	FORMER NAME:	
		FORMER CONFORMED NAME:	Sylebra HK Co Ltd
		DATE OF NAME CHANGE:	20141209

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IMPINJ INC
		CENTRAL INDEX KEY:			0001114995
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRONIC COMPONENTS, NEC [3679]
		IRS NUMBER:				912041398
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		400 FAIRVIEW AVENUE NORTH
		STREET 2:		SUITE 1200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98109
		BUSINESS PHONE:		206-517-5300

	MAIL ADDRESS:	
		STREET 1:		400 FAIRVIEW AVENUE NORTH
		STREET 2:		SUITE 1200
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98109
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-03-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001114995</issuerCik>
        <issuerName>IMPINJ INC</issuerName>
        <issuerTradingSymbol>PI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001745725</rptOwnerCik>
            <rptOwnerName>Gibson Daniel Patrick</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>20/F, 28 HENNESSY ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WAN CHAI</rptOwnerCity>
            <rptOwnerState>K3</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>HONG KONG</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001745666</rptOwnerCik>
            <rptOwnerName>Sylebra Capital Management, Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>20/F, 28 HENNESSY ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WAN CHAI</rptOwnerCity>
            <rptOwnerState>K3</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>HONG KONG</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001627436</rptOwnerCik>
            <rptOwnerName>Sylebra Capital Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>20/F, 28 HENNESSY ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WAN CHAI</rptOwnerCity>
            <rptOwnerState>K3</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>HONG KONG</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-03-13</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>48857</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.211</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4397322</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Control person of managed fund(1)</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4754</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Sylebra Capital Limited (&quot;SCL&quot;), formally known as Sylebra HK Company Limited, may be deemed to beneficially own the Shares by virtue of its position as the investment manager to Sylebra Capital Partners Master Fund Limited and other advisory clients (together &quot;SCPMF&quot;) in relation to the direct holders of the shares. Mr. Gibson owns 100% of the shares of SCL. In such capacities, SCL and Mr. Gibson may be deemed to have voting and dispositive power over the Shares held for the SCPMF.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Yukio Morikubo, Attorney in fact</signatureName>
        <signatureDate>2020-03-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
