Sec Form 4 Filing - LURIO DOUGLAS M @ Armada Acquisition Corp. III - 2026-02-19

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 LURIO DOUGLAS M 2. Issuer Name and Ticker or Trading Symbol Armada Acquisition Corp. III [ 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) See remarks (Last) (First) (Middle) C/O ARMADA ACQUISITION CORP. III, 1760 MARKET STREET, SUITE 602 3. Date of Earliest Transaction (MM/DD/YY) 02/19/2026 (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

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 ( 1 ) 02/19/2026 J( 2 ) 345,083 ( 1 ) ( 1 ) Class A Ordinary Shares 8,252,834 ( 1 ) 8,252,834 I Armada Sponsor III LLC ( 3 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other LURIO DOUGLAS M C/O ARMADA ACQUISITION CORP. III 1760 MARKET STREET, SUITE 602 PHILADELPHIA, PA19103 X X See remarks Signatures /s/ Douglas M. Lurio, Managing Member of Armada Sponsor II LLC 02/26/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )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. ( 2 )As described in the registration statement on Form S-1 (File No. 333-291013), up to 1,136,250 of the Class B Ordinary Shares issued to Armada Sponsor III LLC (the "Sponsor") were subject to forfeiture depending on the extent to which the underwriters' over-allotment option was exercised in connection with the Issuer's initial public offering. On February 19, 2026, the underwriters partially exercised the over-allotment option to purchase an additional 2,350,000 public units and delivered a notice of waiver with respect to the unexercised portion of the over-allotment option, and as a result, the Sponsor forfeited 345,083 Class B Ordinary Shares for no consideration. ( 3 )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.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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