# EDGAR Filing Document

**Accession Number:** 0001202182
**File Stem:** 0001193125-26-111613
**Filing Date:** 2026-3
**Character Count:** 7187
**Document Hash:** 8d96b6f779db3e6efa65a9bc6e48074a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-111613.hdr.sgml**: 20260317

**ACCESSION NUMBER**: 0001193125-26-111613

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260219

**FILED AS OF DATE**: 20260317

**DATE AS OF CHANGE**: 20260317

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** HERBERT STEPHEN P
- **CENTRAL INDEX KEY:** 0001202182

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43132
- **FILM NUMBER:** 26764569

**MAIL ADDRESS:**
- **STREET 1:** 100 DEERFIELD LANE
- **STREET 2:** SUITE 300
- **CITY:** MALVERN
- **STATE:** PA
- **ZIP:** 19355
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Armada Acquisition Corp. III
- **CENTRAL INDEX KEY:** 0002092897
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 981885131
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 0930

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 89 NEXUS WAY
- **CITY:** CARMANA BAY
- **NON US STATE TERRITORY:** GRAND CAYMAN
- **PROVINCE COUNTRY:** E9
- **ZIP:** KY 1-9009
- **BUSINESS PHONE:** 215.543.6886

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 89 NEXUS WAY
- **CITY:** CARMANA BAY
- **NON US STATE TERRITORY:** GRAND CAYMAN
- **PROVINCE COUNTRY:** E9
- **ZIP:** KY 1-9009

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>HERBERT STEPHEN P<br><sub>(Last) (First) (Middle)</sub><br>C/O ARMADA ACQUISITION CORP. III<br>1760 MARKET STREET, SUITE 602<br><sub>(Street)</sub><br>PHILADELPHIA, PA 19103<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-19 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_See Remarks_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Armada Acquisition Corp. III [ AACIU ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Class B Ordinary Shares | <sup>(1)</sup> | 2026-02-19 |  | J<sup>(2)</sup> |  |  | 345083 | <sup>(1)</sup> | <sup>(1)</sup> | Class A Ordinary Shares | 8252834 | <sup>(1)</sup> | 8252834 | I | Armada Sponsor III LLC<sup>(3)</sup> |

---

### Footnotes:

(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.

**Remarks:**
Chief Executive Officer, Chairman, and Director

**Signature:** /s/ Stephen P. Herbert  
**Date:** 2026-03-17

### Remarks:

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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**