Results of Operations

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ____________________________ FORM 8-K ____________________________     CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 12, 2026 ____________________________ DUCOMMUN INCORPORATED (Exact name of registrant as specified in its charter) ____________________________ Delaware 001-08174   95-0693330 (State or other jurisdiction of incorporation) (Commission File Number)   (IRS 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 or former address, if changed since last report.) ____________________________   Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:     ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)     ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)     ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))     ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) 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 is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨ Item 2.02 Results of Operations and Financial Condition. Ducommun Incorporated issued a press release on May 12, 2026 in the form attached hereto as Exhibit 99.1.   Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit No. Exhibit Title or Description 99.1 Ducommun Incorporated press release issued on May 12, 2026. 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.     DUCOMMUN INCORPORATED (Registrant) Date: May 12, 2026   By: /s/ Suman B. Mookerji   Suman B. Mookerji   Senior Vice President, Chief Financial Officer