Jackson Acquisition Co II

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

☒ ANNUAL REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31,2025

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 001-42432

Jackson Acquisition Company II

(Exact name of registrant as specified in its charter)

2655 Northwinds Parkway

Alpharetta, GA 30009

(Address of principal executive offices and zip code)

(770) 643-5605

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐No ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during 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 filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or such shorter period that the registrant was required to submit such files). Yes ☒ 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 an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act:

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.☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control 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 prepared or 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 the filing 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 received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☒ No ☐

The aggregate market value of the Registrant’s Class A ordinary shares outstanding, other than shares held by persons who may be deemed affiliates of the Registrant, at June 30, 2025, the last business day of the Registrant’s most recently completed second fiscal quarter, computed by reference to the closing price of the Class A ordinary shares reported on the New York Stock Exchange on such date, was approximately $240.5 million.

As of March 19, 2026, there were 23,840,000 Class A ordinary shares, $0.0001 par value per share, and 5,750,000 Class B ordinary shares, $0.0001 par value per share, issued and outstanding.

TABLE OF CONTENTS

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CERTAIN TERMS

References to the “Company,” “our Company,” “our,” “us” or “we” refer to Jackson Acquisition Company II, a blank check company incorporated on September 11, 2024 as a Cayman Islands exempted company and formed for the purpose of entering into a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities, which we refer to throughout this Annual Report on Form 10-K as our “initial business combination.” References to the “Sponsor” refer to RJ Healthcare SPAC II, LLC. References to “Roth” are to Roth Capital Partners, LLC, representative of the underwriters. References to “equity-linked securities” are to any securities of the Company which are convertible into, or exchangeable or exercisable for, equity securities of the Company, including any securities issued by the Company which are pledged to secure any obligation of any holder to purchase equity securities of the Company. References to the “SEC” are to the U.S. Securities and Exchange Commission. References to our “initial public offering” refer to our initial public offering, which closed on December 11, 2024. References to “public shares” are to shares of our Class A ordinary shares sold as part of the units in our initial public offering. References to “public shareholders” are to the holders of our public shares.

SPECIAL NOTE REGARDING FORWARD LOOKING STATEMENTS

Certain statements in this Annual Report on Form 10-K (this “Report” or “Annual Report”) may constitute “forward looking statements” for purposes of the federal securities laws. Our forward looking statements include, but are not limited to, statements regarding our or our management team’s expectations, hopes, beliefs, intentions or strategies regarding the future and the statements under “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” regarding our financial position, business strategy and the plans and objectives of management for future operations. In addition, any statements that refer to projections, forecasts or other characterizations of future events or circumstances, including any underlying assumptions, are forward looking statements. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “would” and similar expressions may identify forward looking statements, but the absence of these words does not mean that a statement is not forward looking. Forward looking statements in this Annual Report on Form 10-K may include, for example, statements about:

The forward looking statements contained in this Annual Report on Form 10-K are based on our current expectations and beliefs concerning future developments and their potential effects on us. There can be no assurance that future developments affecting us will be those that we have anticipated. These forward looking statements involve a number of risks, uncertainties (some of which are beyond our control) or other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward looking statements. These risks and uncertainties include, but are not limited to, those factors described under “Part I, Item 1A. Risk Factors.” Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in these forward looking statements. We undertake no obligation to update or revise any forward looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

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