Jasper Therapeutics, Inc. (0001788028) (Filer)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K/A

Amendment No. 1

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 16, 2026

JASPER THERAPEUTICS, INC.

(Exact name of Registrant as specified in its charter)

2200 Bridge Pkwy Suite #102

Redwood City, CA 94065

(650) 549-1400

(Address, Including Zip Code, and Telephone Number, Including Area Code, of Registrant’s Principal Executive Offices)

Not Applicable

(Former name or former address, if changed since last report)

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:

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

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. ☐

Explanatory Note

On July 16, 2026, Jasper Therapeutics, Inc. (the “Company” or “Jasper”) filed a Current Report on Form 8-K (the “Original Form 8-K”) reporting that, on the same date, the Company completed its acquisition (the “Merger”) of Kira Pharmaceuticals (“Kira”), a Cayman Islands exempted company, pursuant to the terms of the Agreement and Plan of Merger, dated July 16, 2026 (the “Merger Agreement”), by and among the Company, Kira Holdco Inc., a Delaware corporation and a wholly owned subsidiary of the Company (“Merger Sub”), and Kira. Pursuant to the Merger Agreement, Kira merged with and into Merger Sub, with Merger Sub continuing as the surviving corporation and a wholly owned subsidiary of the Company.

This Current Report on Form 8-K/A amends Item 9.01 of the Original Form 8-K to include the financial statements and unaudited pro forma financial information required by Items 9.01(a) and (b) of Form 8-K, which were not included in the Original Form 8-K pursuant to Items 9.01(a)(3) and (b)(2) of Form 8-K.

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Item 9.01 Financial Statements and Exhibits.

The audited financial statements and accompanying notes of Kira Pharmaceuticals as of and for the fiscal years ended December 31, 2025 and 2024 are filed as Exhibit 99.1 to this Current Report on Form 8-K/A and incorporated herein by reference.

The unaudited financial statements and accompanying notes of Kira Pharmaceuticals as of and for the six months ended June 30, 2026 and 2025 are filed as Exhibit 99.2 to this Current Report on Form 8-K/A and incorporated herein by reference.

The unaudited pro forma condensed combined balance sheet as of June 30, 2026, the unaudited pro forma condensed combined statement of operations for the six months ended June 30, 2026, the unaudited pro forma condensed combined statement of operations for the year ended December 31, 2025, and the related notes of Jasper Therapeutics, Inc. with respect to the Merger, the concurrent private placement of non-voting convertible preferred stock (the “Financing”), the distribution of contingent value rights and the Mirador License Agreement (as defined in Exhibit 99.3), are filed as Exhibit 99.3 to this Current Report on Form 8-K/A and incorporated herein by reference.

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SIGNATURES

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

Dated: October 1, 2026

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