Cartesian Growth Corp III 8-K

What Happened

• On March 10, 2026, Cartesian Growth Corp III (CGCT) filed an 8-K to report that Factorial, a U.S.-based solid‑state battery developer, announced it received a strategic investment from In-Q-Tel (IQT). IQT joins existing strategic investors Philenergy and POSCO Future M. The press release announcing the investment is attached as Exhibit 99.1 to the filing.
• The filing reiterates that this communication relates to the proposed business combination between Factorial and Cartesian III under the Business Combination Agreement dated December 17, 2025, and states Cartesian III and Factorial intend to file a registration statement on Form S-4 (which will include the definitive proxy statement/prospectus) in connection with the transaction.

Key Details

• Filing date: March 10, 2026 (Form 8-K, Item 8.01 Other Events).
• Strategic investor: IQT (In-Q-Tel), described as the not‑for‑profit strategic investor for the U.S. national security community.
• Other strategic investors: Philenergy and POSCO Future M have previously invested in Factorial.
• Next steps: Cartesian III and Factorial plan to file a Form S-4; a definitive proxy statement/prospectus will be mailed to shareholders once the registration is declared effective.

Why It Matters

• For investors, the IQT investment is a material business development for Factorial that may support its solid‑state battery technology progress and strengthen strategic partnerships ahead of the proposed business combination with Cartesian III.
• The 8-K is an update, not an offer—shareholders will receive full details in the S-4/proxy statement when filed. The filing also contains standard forward‑looking statement warnings and notes that no securities offering has been approved; investors should review the forthcoming S-4/proxy materials before making voting or investment decisions.