Certificate of Incorporation/Bylaws Form 8 K

On June 28, 2024, the Board of Directors of Ducommun Incorporated (the "Company") amended Article I, Section 2 of the Company's Amended and Restated Bylaws (the "Bylaws") to change the Company's principal office for the transaction of business to its Costa Mesa, California corporate headquarters. This description of the amendment to the Company's Bylaws is qualified in its entirety by reference to the text of the Amendment to Bylaws filed as Exhibit 3.1 to this report.