DCO: 10-Q financial filing

dco-20261003 Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _________________________________________________________ FORM 10-Q _________________________________________________________ x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended October 3, 2026 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-08174 _________________________________________________________ DUCOMMUN INCORPORATED (Exact name of registrant as specified in its charter) _________________________________________________________ Delaware 95-0693330 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 600 Anton Boulevard, Suite 1100 , Costa Mesa , California 92626-7100 (Address of principal executive offices) (Zip code) Registrant’s telephone number, including area code: ( 657 ) 335-3665 N/A (Former name, former address and former fiscal year, if changed since last report) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, $.01 par value per share DCO New York Stock Exchange _________________________________________________________ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨ Indicate by check mark whether the registrant has submitted el