Armada Acquisition Corp. II, a Cayman Islands exempted company, filed a Current Report on Form 8-K with the U.S. Securities and Exchange Commission on October 5, 2026, announcing an amendment to its warrant agreement. The amendment, entered into on the same date, was executed between the Company and Continental Stock Transfer & Trust Company, acting as warrant agent.

The filing states that the Warrant Amendment was executed to conform the provisions of the existing Warrant Agreement, dated May 20, 2025, with the description of the warrants contained in the Company’s initial public offering prospectus.

Under the terms of the amendment, the Company’s warrants will become exercisable on the later of two dates: (i) the first date on which the Company completes a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination involving the Company and one or more businesses, or (ii) the date that is twelve months from the date of the closing of the Public Offering.

The Company’s securities are listed on The Nasdaq Stock Market LLC under the ticker symbols XRPN for Class A ordinary shares and XRPNW for warrants. The Company’s Class A ordinary shares have a par value of $0.0001 per share, and the warrants are each exercisable for one Class A ordinary share at an exercise price of $11.50 per share.

The filing also references a registration statement on Form S-4, declared effective on August 27, 2026, regarding a proposed business combination and related transactions. The definitive Proxy Statement/Prospectus was mailed to shareholders of record as of the close of business on August 20, 2026.