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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): February 18, 2026

NEPTUNE INSURANCE HOLDINGS INC.

(Exact name of registrant as specified in its charter)

Delaware001-4287833-4189588

(State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification Number)

400 6th Street S, Suite 2

St. Petersburg, Florida 33701

(Address of principal executive offices, including Zip Code)

Registrant’s telephone number, including area code: (727) 202-4815

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 classTrading SymbolName of each exchange on which registered

Class A Common Stock, par value $0.00001 per shareNPThe 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 2.02Results of Operations and Financial Condition.

On February 18, 2026, Neptune Insurance Holdings Inc. (the “Company”) issued a press release and an earnings presentation announcing its financial results for the fourth quarter and full year ended December 31, 2025. A copy of the press release and the earning presentation are furnished as Exhibit 99.1 and Exhibit 99.2, respectively, to this Current Report on Form 8-K.

The information contained in this Current Report on Form 8-K, including Exhibit 99.1 and Exhibit 99.2 attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any registration statement or other document filed with the Securities and Exchange Commission by the Company whether made before or after the date hereof, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing.

Item 9.01Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.Description

99.1 Press Release issued by Neptune Insurance Holdings Inc., dated February 18, 2026.

99.2 Earnings presentation, dated February 18, 2026.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

NEPTUNE INSURANCE HOLDINGS INC.

Date: February 18, 2026 By:/s/ Trevor Burgess

Trevor Burgess

Chief Executive Officer

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