Sec Form 3/A Filing - Tata Rajiv A. @ DUCOMMUN INC /DE/ - 2020-01-24

FORM 3/A Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Tata Rajiv A. 2. Issuer Name and Ticker or Trading Symbol DUCOMMUN INC /DE/ [ DCO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) V.P., General Counsel (Last) (First) (Middle) 200 SANDPOINTE AVENUE, SUITE 700 3. Date of Earliest Transaction (MM/DD/YY) 01/24/2020 (Street) SANTA ANA, CA92707 4. If Amendment, Date Original Filed (MM/DD/YY) 01/30/2020 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock ( 1 ) 2,124 ( 1 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option ( 2 ) $ 29 04/10/2020( 3 ) 04/10/2024 Common Stock 375 D Stock Option ( 2 ) $ 32.9 05/14/2020( 4 ) 05/14/2028 Common Stock 1,834 D Stock Option ( 2 ) $ 42.25 06/17/2020( 5 ) 06/17/2029 Common Stock 5,840 D Stock Option ( 2 ) $ 40.44 10/10/2020( 6 ) 10/10/2029 Common Stock 2,500 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Tata Rajiv A. 200 SANDPOINTE AVENUE SUITE 700 SANTA ANA, CA92707 V.P., General Counsel Signatures Rajiv A. Tata 04/13/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The amount listed includes: (1) 166 restricted stock units ("RSU"s) that vest on April 10, 2020; (2) 500 RSUs that will vest in in equal annual amounts on each of May 14, 2020 and 2021; (3) 590 RSUs that will vest in three equal annual amounts on each of June 17, 2020, 2021 and 2022; (4) 342 stock options previously exercised; and (5) 174 shares of common stock purchased through Ducommun Incorporated's Employee Stock Purchase Plan. ( 2 )This option represents the right to purchase common stock granted under Ducommun Incorporated's employee stock option plans, which are Rule 16b-3 plans. ( 3 )The option will vest in two equal installments on April 10, 2020 and 2021. ( 4 )This option will vest in two equal installments on May 14, 2020 and 2021. ( 5 )This option will vest in three equal installments on June 17, 2020, 2021 and 2022. ( 6 )This option will vest in three equal installments on October 10, 2020, 2021 and 2022.

Remarks: This amendment is being filed solely to correct a few clerical errors in the original Form 3 filed by the reporting person which inadvertently excluded: (1) from the number of securities beneficially owned by the reporting person as of January 24, 2020, 1,256 unvested restricted stock units, and (2) details regarding the number of derivative securities beneficially owned by the reporting person as of January 24, 2020.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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