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
- May 18, 2026, 8:08 PM EDT
- Event / period date
- May 14, 2026
- Collected
- Nov 10, 2026, 3:47 PM 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
Mookerji Suman B. (Sr. V.P., C.F.O.)
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>2026-05-14</periodOfReport>
<dateOfOriginalSubmission>2026-05-15</dateOfOriginalSubmission>
<issuer>
<issuerCik>0000030305</issuerCik>
<issuerName>DUCOMMUN INC /DE/</issuerName>
<issuerTradingSymbol>DCO</issuerTradingSymbol>
<issuerForeignTradingSymbol></issuerForeignTradingSymbol>
</issuer>
<reportingOwner>
<reportingOwnerId>
<rptOwnerCik>0001975924</rptOwnerCik>
<rptOwnerName>Mookerji Suman B.</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>false</isDirector>
<isOfficer>true</isOfficer>
<isTenPercentOwner>false</isTenPercentOwner>
<isOther>false</isOther>
<officerTitle>Sr. V.P., C.F.O.</officerTitle>
</reportingOwnerRelationship>
</reportingOwner>
<aff10b5One>false</aff10b5One>
<nonDerivativeTable>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-05-14</value>
</transactionDate>
<deemedExecutionDate>
<value>2026-05-14</value>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>F</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>1239</value>
<footnoteId id="F1"/>
</transactionShares>
<transactionPricePerShare>
<value>15159</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>25825</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-05-14</value>
</transactionDate>
<deemedExecutionDate>
<value>2026-05-14</value>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>D</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>1259</value>
<footnoteId id="F2"/>
</transactionShares>
<transactionPricePerShare>
<footnoteId id="F2"/>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>24566</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-05-15</value>
</transactionDate>
<deemedExecutionDate>
<value>2026-05-15</value>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>7500</value>
</transactionShares>
<transactionPricePerShare>
<value>40.44</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>32066</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2026-05-15</value>
</transactionDate>
<deemedExecutionDate>
<value>2026-05-15</value>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>F</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>4783</value>
<footnoteId id="F3"/>
</transactionShares>
<transactionPricePerShare>
<value>151.59</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>27283</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
</nonDerivativeTable>
<derivativeTable>
<derivativeTransaction>
<securityTitle>
<value>Option - Right to Buy</value>
<footnoteId id="F4"/>
</securityTitle>
<conversionOrExercisePrice>
<value>40.44</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2026-05-15</value>
</transactionDate>
<deemedExecutionDate>
<value>2026-05-15</value>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>false</equitySwapInvolved>
</transactionCoding>
<transactionAmounts>
<transactionShares>
<value>7500</value>
</transactionShares>
<transactionPricePerShare>
<value>0</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<value>2022-10-10</value>
<footnoteId id="F5"/>
</exerciseDate>
<expirationDate>
<value>2029-10-10</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>7500</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>0</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeTransaction>
</derivativeTable>
<footnotes>
<footnote id="F1">Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 14, 2026 of 2,498 restricted stock units.</footnote>
<footnote id="F2">In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financialstatements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined basedon the restated financial statements. As a result, 2,498 restricted stock units that vested on May 14, 2026 were not delivered to the Reporting Person and 1,259 shares of the Issuer's common stock were returnedto the Issuer in accordance with the Issuer's Clawback Policy.</footnote>
<footnote id="F3">The number of shares withheld to satisfy the tax withholding obligations of the Issuer with respect to the exercise of 7,500 stock options on May 15, 2026 was inadvertently identified as 4,728 shares, which has been corrected above.</footnote>
<footnote id="F4">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="F5">This option vested as to 2,500 shares on each of October 10, 2020, 2021 and 2022.</footnote>
</footnotes>
<ownerSignature>
<signatureName>Suman B. Mookerji</signatureName>
<signatureDate>2026-05-18</signatureDate>
</ownerSignature>
</ownershipDocument>
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.