UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) ☒ OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2023 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) ☐ OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 0-28190 CAMDEN NATIONAL CORPORATION (Exact Name of Registrant As Specified in Its Charter) Maine 01-0413282 (State or Other Jurisdiction of (I.R.S. Employer Incorporation or Organization) ...