<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2026-06-01</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001849820</issuerCik>
        <issuerName>Nauticus Robotics, Inc.</issuerName>
        <issuerTradingSymbol>KITT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002147429</rptOwnerCik>
            <rptOwnerName>DROR BRIAN ISAAC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>5862 W. 3RD STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90036</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>COMMON STOCK, $0.0001 PAR VALUE</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>782829</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>MANAGER OF RCB EQUITIES #1, LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>SERIES C CONVERTIBLE PREFERRED STOCK</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>7.6</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>COMMON STOCK, $0.0001 PAR VALUE</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>631579</value>
                    <footnoteId id="F3"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>MANAGER OF RCB EQUITIES #1, LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Upon stockholder approval</footnote>
        <footnote id="F2">None</footnote>
        <footnote id="F3">Reporting person holds 4,800 shares of Series C Convertible Preferred Stock (stated value $1,000 per share; aggregate stated value $4,800,000) acquired on June 26, 2026 pursuant to an Exchange Agreement with Nauticus Robotics, Inc. The Series C Preferred Stock is convertible into shares of Common Stock at $7.60 per share (631,579 shares as-converted). Conversion requires stockholder approval pursuant to Nasdaq Listing Rule 5635. The Series C Preferred Stock was acquired as part of a conversion of $4,000,000 of outstanding indebtedness under a Senior Secured Term Loan Agreement dated September 18, 2023, at a 20% premium.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>BRIAN ISAAC DROR</signatureName>
        <signatureDate>2026-07-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
