☑ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the fiscal year endedDecember 31, 2024 OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period _____ to _____ Commission File Number001-35761American Coastal Insurance Corporation (Exact Name of Registrant as Specified in Its Charter) Delaware75-3241967(State or Other Jurisdiction ofIncorporation or Organization)(IRS Employer Identification Number)570 Carillon Parkway, Suite 10033716St. Petersburg,Florida(Address of Principal Executive Offices)(Zip Code)727-633-0851(Telephone number, including area code)800 2nd Avenue S. St. Petersburg, Florida 33701(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 ClassTrading Symbol(s)Name of Each Exchange on Which RegisteredCommon Stock, $0.0001 par value per shareACICNasdaq Stock Market LLC Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule405 of the Securities Act.Yes☐NoR Indicate by check mark if the registrant is not required to file reports pursuant to Section13 or Section15(d) of the Act.Yes☐NoR Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the Securities Exchange Act of 1934during 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 filingrequirements for the past 90 days.Yes R No£ Indicate by check mark whether the registrant has submitted electronically everyInteractive Data File required to be submitted pursuant to Rule 405 ofRegulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).Yes R No£ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or anemerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company”in Rule 12b-2 of the Exchange Act. Large accelerated filer£Non-accelerated filer£ Accelerated filerþSmaller reporting company☐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 newor revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.£ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐NoR Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internalcontrol over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C 7262(b)) by the registered public accounting firm that preparedor issued its audit report.☐ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in thefiling reflect the correction of an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation receivedby any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).£ The aggregate market value of shares of the registrant’s common stock held by non–affiliates of the registrant was approximately $253,270,000as of June30, 2024, calculated using the closing sales price reported for such date on the Nasdaq Stock Market LLC (Nasdaq). For purposes of this disclosure, sharesof common stock held by persons who hold more than 10% of the outstanding shares of common stock and shares held by executive officers and directorsof the registrant have been excluded because such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily aconclusive determination for other purposes. As of March3, 2025,48,248,630shares of the registrant’s common stock were outstanding. DOCUMENTS INCORPORATED BY REFERENCEPart III of this Form 10-K incorporates by reference certain information from the Proxy Statement for the 2025 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days after the end of our fiscal year ended December31, 2024. Throughout this Annual Report on Form 10-K (Form 10-K), we present amounts in all tables in thousands, except for shareamounts, per share amounts, policy and claim counts or where more specific language or context indicates a different presentation. Inthe narrative sections of this Form 10-K, we show full values rounded to the nearest thousand. FORWARD-LOOKING STATEMENTS State