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 12, 2026

Spartacus Acquisition Corp. II

(Exact Name of Registrant as Specified in Its Charter)

3800 N Lamar Blvd, Suite 200

Austin, TX 78756

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (770) 305-6434

Not Applicable

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

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

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:

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 8.01. Other Events.

On February 12, 2026, the Company consummated its initial public offering (the “IPO”) of 23,000,000 units (the “Units”), including 3,000,000 Units issued pursuant to the full exercise by the underwriters of their over-allotment option. The Units were sold at a price of $10.00 per Unit, generating gross proceeds to the Company of $230,000,000. Each Unit consists of one Class A ordinary share of the Company, par value $0.0001 per share (the “Class A Ordinary Shares” and such shares sold in the IPO, the “Public Shares”), and one-third of one redeemable warrant of the Company (each whole warrant, a “Warrant”), with each whole Warrant entitling the holder thereof to purchase one Class A Ordinary Share for $11.50 per share.

Simultaneously with the closing of the IPO, pursuant to a private placement warrant purchase agreement with Spartacus Sponsor II LLC, a Delaware limited liability company (the “Sponsor”), the Company completed the private sale (the “Private Placement”) of 4,125,000 warrants (the “Private Placement Warrants”) to the Sponsor, with each Private Placement Warrant exercisable to purchase one Class A ordinary share at $11.50 per share, at a price of $1.00 per Private Placement Warrant, generating gross proceeds of $4,125,000 in the aggregate.

A total of $230,000,000, or $10.00 per Public Share, comprised of the net proceeds from the IPO and the Private Placement, was placed in a U.S.-based trust account maintained by Continental Stock Transfer & Trust Company, acting as trustee.

An audited balance sheet as of February 12, 2026 reflecting the receipt of the proceeds from the IPO and the Private Placement has been issued by the Company and is included as Exhibit 99.1 to this Current Report on Form 8-K.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

SIGNATURE

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.