<SEC-DOCUMENT>0001375889-26-000004.txt : 20260218
<SEC-HEADER>0001375889-26-000004.hdr.sgml : 20260218
<ACCEPTANCE-DATETIME>20260218200502
ACCESSION NUMBER:		0001375889-26-000004
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260213
FILED AS OF DATE:		20260218
DATE AS OF CHANGE:		20260218

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Grewal Harpreet
		CENTRAL INDEX KEY:			0001375889
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37557
		FILM NUMBER:		26651098

	MAIL ADDRESS:	
		STREET 1:		C/O VISTAPRINT USA, INCORPORATED
		STREET 2:		100 HAYDEN AVE.
		CITY:			LEXINGTON
		STATE:			MA
		ZIP:			02050

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Penumbra Inc
		CENTRAL INDEX KEY:			0001321732
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE PENUMBRA PLACE
		CITY:			ALAMEDA
		STATE:			CA
		ZIP:			94502
		BUSINESS PHONE:		(510) 995-2486

	MAIL ADDRESS:	
		STREET 1:		ONE PENUMBRA PLACE
		CITY:			ALAMEDA
		STATE:			CA
		ZIP:			94502
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1771463100.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-02-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001321732</issuerCik>
        <issuerName>Penumbra Inc</issuerName>
        <issuerTradingSymbol>PEN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001375889</rptOwnerCik>
            <rptOwnerName>Grewal Harpreet</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE PENUMBRA PLACE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ALAMEDA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94502</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-02-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>589</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8819</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Restricted stock units (RSUs) vest as to 1/4 on each of March 31, 2026, June 30, 2026, September 30, 2026, and December 31, 2026, subject to Mr. Grewal's continued service as director through such dates. Notwithstanding the foregoing, if the Closing (as defined in that certain Agreement and Plan of Merger, dated as of January 14, 2026, among the Issuer, Boston Scientific Corporation, a Delaware corporation, and Pinehurst Merger Sub, Inc., a Delaware corporation) occurs, any of the RSUs that remain unvested will fully vest on the Closing, subject to Mr. Grewal's continued service as director through such date.</footnote>
        <footnote id="F2">A portion of these shares is subject to vesting.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Johanna Roberts, as attorney-in-fact for Harpreet Grewal</signatureName>
        <signatureDate>2026-02-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
