Crown PropTech Acquisitions filed a Form 8-K on November 6, 2026, disclosing that the SEC declared effective on November 4, 2026, the Form F-4 registration statement related to its proposed business combination with Mkango Rare Earths Limited, and that mailing of the definitive proxy statement/prospectus commenced on November 5, 2026.

Key Highlights

  • SEC effectiveness: The SEC declared the Form F-4 registration statement (File No. 333-296089) effective on November 4, 2026, according to the filing.
  • Proxy mailing launched: Crown PropTech commenced mailing of the definitive proxy statement/prospectus on November 5, 2026.
  • Amended agreement in place: The Amended and Restated Business Combination Agreement was entered into on September 2, 2026, amending and restating the original agreement dated July 2, 2025, as further amended on February 13, 2026, and May 20, 2026.
  • Parties involved: The business combination involves Crown PropTech Acquisitions (SPAC), Mkango Rare Earths Limited (MKAR), Mkango Polska Sp. z o.o. (MKA Poland), and Mkango (Cayman) Limited (Merger Sub).
  • Registration Statement origin: The Form F-4 was originally filed on May 20, 2026, by MKAR and SPAC jointly.
  • Warrant trading symbol: The registrant's redeemable warrants trade under the symbol CPTKW, as listed in the filing's registered-securities table.

Crown PropTech and Mkango Rare Earths Advance Business Combination After F-4 Clears SEC Review

According to the filing, the SEC's declaration of effectiveness for the Form F-4 registration statement on November 4, 2026, marks a key procedural step in the proposed business combination between Crown PropTech Acquisitions, a Cayman Islands exempted company, and Mkango Rare Earths Limited, a British Virgin Islands company and direct, wholly owned subsidiary of Mkango Magnetic Materials Limited, a British Columbia company. The registration statement contains both a proxy statement of the SPAC and a prospectus of MKAR in connection with the proposed transaction.

The filing disclosed that the business combination agreement has been amended multiple times since the original agreement was signed on July 2, 2025. The most recent version, the Amended and Restated Business Combination Agreement, was entered into on September 2, 2026, and entirely superseded the original and its prior amendments. The definitive proxy statement/prospectus, mailed beginning November 5, 2026, is described by the filing as providing "important information about SPAC, MKAR and the Business Combination."

The filing noted that it is intended to simultaneously satisfy obligations under Rule 425 of the Securities Act, designating it as written communications in connection with the proposed transaction. The filing also attached as Exhibit 99.1 a press release from Mkango announcing the SEC's effectiveness declaration. The filing contains forward-looking statements, which the registrant noted "are based on the current expectations of the respective management teams of SPAC and MKAR" and are "inherently subject to uncertainties and changes in circumstance."

What Was Disclosed

Crown PropTech Acquisitions filed an 8-K reporting the SEC's November 4, 2026 declaration that the Form F-4 (File No. 333-296089) is effective, and confirming that mailing of the proxy statement/prospectus for the proposed Mkango Rare Earths business combination began on November 5, 2026.