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

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-05-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000804328</issuerCik>
        <issuerName>QUALCOMM INC/DE</issuerName>
        <issuerTradingSymbol>QCOM</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001786420</rptOwnerCik>
            <rptOwnerName>Palkhiwala Akash J.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>5775 MOREHOUSE DR.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92121-1714</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP, CFO &amp; COO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>1</aff10b5One>

    <nonDerivativeTable>
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            </securityTitle>
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                </transactionShares>
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                </transactionPricePerShare>
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            </postTransactionAmounts>
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                </directOrIndirectOwnership>
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            <transactionDate>
                <value>2026-05-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>84</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>223.2707</value>
                    <footnoteId id="F21"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28362</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-05-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>56</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>224.4757</value>
                    <footnoteId id="F22"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28306</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-05-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>32</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>225.4853</value>
                    <footnoteId id="F23"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28274</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-05-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>78</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>226.4946</value>
                    <footnoteId id="F24"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28196</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-05-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>12</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>227.265</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28184</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on December 8, 2025.</footnote>
        <footnote id="F2">The sale prices for this transaction ranged from $202.0200 to $202.8300. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F3">The sale prices for this transaction ranged from $203.2500 to $203.9350. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F4">The sale prices for this transaction ranged from $204.1650 to $204.9500. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F5">The sale prices for this transaction ranged from $205.0300 to $205.9700. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F6">The sale prices for this transaction ranged from $206.0400 to $206.8150. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F7">The sale prices for this transaction ranged from $207.0850 to $207.9950. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F8">The sale prices for this transaction ranged from $208.0350 to $208.9800. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F9">The sale prices for this transaction ranged from $209.0900 to $209.9500. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F10">The sale prices for this transaction ranged from $210.0950 to $210.7950. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F11">The sale prices for this transaction ranged from $211.2700 to $211.8900. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F12">The sale prices for this transaction ranged from $212.4350 to $212.9950. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F13">The sale prices for this transaction ranged from $213.1500 to $213.4550. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F14">The sale prices for this transaction ranged from $214.1150 to $214.5750. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F15">The sale prices for this transaction ranged from $215.0750 to $215.8550. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F16">The sale prices for this transaction ranged from $216.1100 to $216.5200. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F17">The sale prices for this transaction ranged from $219.1350 to $219.8850. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F18">The sale prices for this transaction ranged from $220.3850 to $220.9250. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F19">The sale prices for this transaction ranged from $221.0750 to $221.9600. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F20">The sale prices for this transaction ranged from $222.4150 to $222.8750. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F21">The sale prices for this transaction ranged from $223.1450 to $223.5900. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F22">The sale prices for this transaction ranged from $224.2450 to $224.6750. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F23">The sale prices for this transaction ranged from $225.3300 to $225.6850. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F24">The sale prices for this transaction ranged from $226.2900 to $226.7100. The filer hereby agrees to provide, upon request, full information regarding the number of shares sold at each separate price.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Jon Russo, Attorney-in-Fact For: Akash J. Palkhiwala</signatureName>
        <signatureDate>2026-05-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
