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): November 16, 2021

Coliseum Acquisition Corp.

(Exact name of registrant as specified in its charter)

80 Pine Street, Suite 3202

New York, New York 10005

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: 212-600-5763

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 x

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 4.02. Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review.

In light of recent guidance provided by the U.S. Securities and Exchange Commission (the “SEC”), the management of Coliseum Acquisition Corp. (the “Company”) has re-evaluated the Company’s application of ASC 480-10-S99-3A to its accounting classification of the redeemable shares of Class A ordinary shares, par value $0.001 per share (the “Public Shares”), issued as part of the units sold in the Company’s initial public offering (the “IPO”) on June 25, 2021. Historically, a portion of the Public Shares was classified as permanent equity to maintain net tangible assets greater than $5,000,000 on the basis that the Company will consummate its initial business combination only if the Company has net tangible assets of at least $5,000,001. Pursuant to such re-evaluation, the Company’s management has determined that the Public Shares include certain provisions that require classification of the Public Shares as temporary equity regardless of the minimum net tangible assets required to complete the Company’s initial business combination.

Therefore, on November 15, 2021, the Company’s management and the audit committee of the Company’s board of directors (the “Audit Committee”) concluded that the Company’s previously issued (i) audited balance sheet included in the Company’s Current Report on Form 8-K, filed with the SEC on July 1, 2021 and (ii) unaudited interim financial statements included in the Company’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2021, filed with the SEC on August 20, 2021 (collectively, the “Affected Periods”), should be restated to report all Public Shares as temporary equity and should no longer be relied upon. As such, the Company will restate its financial statements for the Affected Periods in the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021, to be filed with the SEC (the “Q3 Form 10-Q”), as described therein.

The Company does not expect any of the above changes will have any impact on its cash position and cash held in the trust account established in connection with the IPO (the “Trust Account”).

The Company’s management has concluded that in light of the classification error described above, a material weakness exists in the Company’s internal control over financial reporting and that the Company’s disclosure controls and procedures were not effective. The Company’s remediation plan with respect to such material weakness will be described in more detail in the Q3 Form 10-Q.

The Company’s management and the Audit Committee have discussed the matters disclosed in this Current Report on Form 8-K pursuant to this Item 4.02 with Marcum LLP, the Company’s independent registered public accounting firm.

Forward-Looking Statements

This Current Report on Form 8-K may include, and oral statements made from time to time by representatives of the Company may include, “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical fact included in this Current Report on Form 8-K are forward-looking statements. When used in this Current Report on Form 8-K, words such as “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “will”, “would” and similar expressions, as they relate to the Company or its management team, identify forward-looking statements. Such forward-looking statements may include, but are not limited to, statements regarding the impact of the Company’s restatement of certain historical financial statements, the Company’s cash position, and cash held in the Trust Account and any proposed remediation measures with respect to identified material weaknesses. Such forward-looking statements are based on the beliefs of management, as well as assumptions made by, and information currently available to, the Company’s management on the date of this Current Report on Form 8-K. Actual results could differ materially from those contemplated by the forward-looking statements as a result of certain factors detailed in the Company’s filings with the SEC. All subsequent written or oral forward-looking statements attributable to the Company or persons acting on its behalf are qualified in their entirety by this paragraph. Forward-looking statements are subject to numerous conditions, many of which are beyond the control of the Company, including those set forth in the Risk Factors section of the Company’s registration statement for the Company’s initial public offering filed with the SEC. The Company undertakes no obligation to update these statements for revisions or changes after the date of this release, except as required by law.

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.