Sec Form 4 Filing - HERBERT STEPHEN P @ Armada Acquisition Corp. II - 2025-08-12

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person HERBERT STEPHEN P 2. Issuer Name and Ticker or Trading Symbol Armada Acquisition Corp. II [ AACIU] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) CEO (Last) (First) (Middle) C/O ARMADA ACQUISITION CORP. II, 1760 MARKET STREET, SUITE 602 3. Date of Earliest Transaction (MM/DD/YY) 08/12/2025 (Street) PHILADELPHIA, PA19103 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Ordinary Shares 08/12/2025 S 400,000 ( 1 ) D 0 I Armada Sponsor II LLC ( 2 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Class B Ordinary Shares ( 3 ) 08/12/2025 J( 1 ) 7,880,000 ( 3 ) ( 3 ) Class A Ordinary Shares 7,880,000 ( 1 ) 0 I Armada Sponsor II LLC ( 2 ) Private Placement Warrants ( 4 ) ( 5 ) 08/12/2025 J( 1 ) 200,000 ( 5 ) ( 5 ) Class A Ordinary Shares 200,000 ( 1 ) 0 I Armada Sponsor II LLC ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other HERBERT STEPHEN P C/O ARMADA ACQUISITION CORP. II 1760 MARKET STREET, SUITE 602 PHILADELPHIA, PA19103 X X CEO Signatures /s/ Stephen P. Herbert 09/11/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents 400,000 Class A ordinary shares (the "Private Placement Shares") that are included in the 400,000 private placement units of the Issuer purchased by Armada Sponsor II LLC (the In connection with the Sponsor Securities Purchase Agreement, dated August 12, 2025, by and among Armada Acquisition Corp. II, Armada Sponsor II LLC (the "Original Sponsor") and Arrington XRP Capital Fund, LP (the "New Sponsor"), the Original Sponsor sold to the New Sponsor an aggregate of 7,880,000 Class B ordinary shares (the "Founder Shares") and 400,000 private placement units (the "Private Placement Units"), consisting of 400,000 Class A ordinary shares and 200,000 private placement warrants (the "Private Placement Warrants") of the Company. The New Sponsor purchased the Founder Shares and Private Placement Units for $2,600,000 and $4,000,000, respectively, for an aggregate purchase price of $6,600,000. ( 2 )The securities are held directly by the Sponsor. The Reporting Person is a managing member of the Sponsor, therefore, he may be deemed to have beneficial ownership of the securities held directly by the Sponsor. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein. ( 3 )The Class B Ordinary Shares have no expiration date and will automatically convert into Class A Ordinary Shares at the time of the Issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis. ( 4 )Represents Private Placement Warrants included in the 400,000 Private Placement Units. ( 5 )Each Private Placement Warrant is exercisable for cash or on a cashless basis, as described in the Registration Statement. Assuming an exercise for cash, 200,000 Private Placement Shares would be issued upon exercise of the Private Placement Warrants. The Private Placement Warrants expire five (5) years after the completion of the Issuer's initial business combination or earlier upon redemption or liquidation of the Issuer, as described in the Registration Statement.

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