SEC EDGAR · Amended filing
DCO: amended insider filing
An amended ownership report was filed. Read the original and amendment before comparing transactions.
Follow DCO- Became public
- Aug 13, 2026, 6:30 PM EDT
- Event / period date
- Aug 11, 2026
- Collected
- Nov 9, 2026, 9:36 AM EST
Why this is connected
This filing identifies DUCOMMUN INC /DE/ as the issuer of the security. The company's SEC identifier connects it to DCO.
Reported transactions
Oswald Stephen G (Chairman, President & CEO)
Code P covers open-market and private purchases. Grants, option exercises, and tax withholding are excluded from purchase results. Read the source footnotes for ownership and pricing details.
Source evidence
Read the source excerpt or record
<?xml version="1.0"?>
<ownershipDocument>
<schemaVersion>X0609</schemaVersion>
<documentType>4/A</documentType>
<periodOfReport>2026-08-11</periodOfReport>
<dateOfOriginalSubmission>2026-08-13</dateOfOriginalSubmission>
<issuer>
<issuerCik>0000030305</issuerCik>
<issuerName>DUCOMMUN INC /DE/</issuerName>
<issuerTradingSymbol>DCO</issuerTradingSymbol>
<issuerForeignTradingSymbol></issuerForeignTradingSymbol>
</issuer>
<reportingOwner>
<reportingOwnerId>
<rptOwnerCik>0001695904</rptOwnerCik>
<rptOwnerName>Oswald Stephen G</rptOwnerName>
</reportingOwnerId>
<reportingOwnerAddress>
<rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
<rptOwnerStreet1>600 ANTON BLVD.</rptOwnerStreet1>
<rptOwnerStreet2>SUITE 1100</rptOwnerStreet2>
<rptOwnerCity>COSTA MESA</rptOwnerCity>
<rptOwnerState>CA</rptOwnerState>
<rptOwnerZipCode>92626</rptOwnerZipCode>
<rptOwnerStateDescription></rptOwnerStateDescription>
</reportingOwnerAddress>
<reportingOwnerRelationship>
<isDirector>true</isDirector>
<isOfficer>true</isOfficer>
<isTenPercentOwner>false</isTenPercentOwner>
<isOther>false</isOther>
<officerTitle>Chairman, President & CEO</officerTitle>
</reportingOwnerRelationship>
</reportingOwner>
<aff10b5One>false</aff10b5One>
<nonDerivativeTable>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-08-11</value>
</transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>15000</value>
</transactionShares>
<transactionPricePerShare>
<value>32.90</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>400875</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-08-11</value>
</transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>F</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>9234</value>
</transactionShares>
<transactionPricePerShare>
<value>194.85</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>391641</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-08-12</value>
</transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>S</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>5766</value>
</transactionShares>
<transactionPricePerShare>
<value>201.15</value>
<footnoteId id="F1"/>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>385875</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-08-12</value>
</transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>G</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>3400</value>
<footnoteId id="F2"/>
</transactionShares>
<transactionPricePerShare>
<value>0</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>382475</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
</nonDerivativeTable>
<derivativeTable>
<derivativeTransaction>
<securityTitle>
<value>Option - Right to Buy</value>
<footnoteId id="F3"/>
</securityTitle>
<conversionOrExercisePrice>
<value>32.90</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2026-08-11</value>
</transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>15000</value>
</transactionShares>
<transactionPricePerShare>
<value>0</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<value>2021-05-14</value>
<footnoteId id="F4"/>
</exerciseDate>
<expirationDate>
<value>2028-05-14</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>15000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>17500</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeTransaction>
</derivativeTable>
<footnotes>
<footnote id="F1">This transaction was executed in multiple trades at prices ranging from $200.15 to $202.08. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder, full information regarding the number of shares and prices at which the transaction was effectuated.</footnote>
<footnote id="F2">The number of shares gifted on August 12, 2026 was inadvertently identified as 2,244 shares, which has been corrected above.</footnote>
<footnote id="F3">This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.</footnote>
<footnote id="F4">This option vested in one-third increments on each of May 14, 2019, 2020 and 2021.</footnote>
</footnotes>
<ownerSignature>
<signatureName>Stephen G. Oswald</signatureName>
<signatureDate>2026-08-13</signatureDate>
</ownerSignature>
</ownershipDocument>
Price change after we could observe it
-0.27% DCO
Adjusted closing prices from Nov 10, 2026 to Nov 11, 2026. SPY changed 1.32% over the same dates. The start is the first available close after both publication and collection. This is a price comparison, not an executed trade, investor profit, or a backtested strategy.
Congressional trading in DCO
These disclosures provide context. Their presence does not establish a link between a trader and the event.
DisclosedTradeAmount
- Sep 10, 2026$1K–$15K
Rep. Gilbert Ray Cisneros, Jr. (D-CA-31)
$1K–$15K · Traded Aug 7, 2026 · disclosed Sep 10, 2026
Committee overlap: Armed Services - Sep 4, 2026$1K–$15K
Rep. Gilbert Ray Cisneros, Jr. (D-CA-31)
$1K–$15K · Traded Jul 10, 2026 · disclosed Sep 4, 2026 · filed 56 days later
Committee overlap: Armed Services - Jun 8, 2026$1K–$15K
Rep. Gilbert Ray Cisneros, Jr. (D-CA-31)
$1K–$15K · Traded May 18, 2026 · disclosed Jun 8, 2026
Committee overlap: Armed Services - Nov 11, 2023$1K–$15K
Rep. Josh Gottheimer (D-NJ-5)
$1K–$15K · Traded Oct 11, 2023 · disclosed Nov 11, 2023 · Joint
Original documents control. Public records can be amended, and company connections may require interpretation. Nothing here is investment advice.