# EDGAR Filing Document

**Accession Number:** 0001584258
**File Stem:** 0001193125-25-308160
**Filing Date:** 2025-12
**Character Count:** 12045
**Document Hash:** e2d577843e1499d98bc5ca6f72b0fabd
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-308160.hdr.sgml**: 20251204

**ACCESSION NUMBER**: 0001193125-25-308160

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20251121

**FILED AS OF DATE**: 20251204

**DATE AS OF CHANGE**: 20251204

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Duke University
- **CENTRAL INDEX KEY:** 0001439873

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** NC
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41022
- **FILM NUMBER:** 251550261

**BUSINESS ADDRESS:**
- **STREET 1:** DUKE UNIVERSITY
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27708
- **BUSINESS PHONE:** (919) 668-9995

**MAIL ADDRESS:**
- **STREET 1:** C/O DUMAC, LLC, 406 BLACKWELL STREET
- **STREET 2:** SUITE 300
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27701
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** DUMAC, INC.
- **CENTRAL INDEX KEY:** 0001584258

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** NC
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41022
- **FILM NUMBER:** 251550262

**BUSINESS ADDRESS:**
- **STREET 1:** 280 S. MANGUM STREET
- **STREET 2:** SUITE 210
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27701
- **BUSINESS PHONE:** 9196689995

**MAIL ADDRESS:**
- **STREET 1:** 280 S. MANGUM STREET
- **STREET 2:** SUITE 210
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27701
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Rigel Resource Acquisition Corp.
- **CENTRAL INDEX KEY:** 0001860879
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** C/O ORION RESOURCE PARTNERS (USA) LP
- **STREET 2:** 7 BRYANT PARK
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10018
- **BUSINESS PHONE:** (212) 596-3511

**MAIL ADDRESS:**
- **STREET 1:** C/O ORION RESOURCE PARTNERS (USA) LP
- **STREET 2:** 7 BRYANT PARK
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10018

## Exhibit 99.1

**Exhibit 99.1**

**Form 4 Joint Filer Information**

---

| | |
|:---|:---|
| &nbsp;&nbsp; <br>Name:<br>| &nbsp;&nbsp; <br>Duke University |
| &nbsp;&nbsp; <br>Address:<br>| &nbsp;&nbsp; <br>c/o DUMAC, Inc.<br>280 S Mangum St., Suite 210<br>Durham, NC 27701<br>|
| &nbsp;&nbsp; <br>Date of Event Requiring Statement:<br>| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>11/21/2025 |

---

------

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[x] 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>DUMAC, INC.<br><sub>(Last) (First) (Middle)</sub><br>280 S MANGUM STREET<br>SUITE 210<br><sub>(Street)</sub><br>DURHAM, NC 27701<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-21 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Rigel Resource Acquisition Corp. [ RRAC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Duke University<br><sub>(Last) (First) (Middle)</sub><br>C/O DUMAC, INC.<br>280 S MANGUM ST., SUITE 210<br><sub>(Street)</sub><br>DURHAM, NC 27701<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-21 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Rigel Resource Acquisition Corp. [ RRAC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] 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 |
| Class A Ordinary Shares | 2025-11-21 |  | S<sup>(1)</sup> |  | 192000 | D | 12.1517<sup>(1)</sup> | 0 | I | See Footnotes<sup>(2)(3)(7)</sup> |
| Class A Ordinary Shares | 2025-11-21 |  | S<sup>(1)</sup> |  | 109000 | D | 12.1517<sup>(1)</sup> | 0 | I | See Footnotes<sup>(3)(4)(7)</sup> |
| Class A Ordinary Shares | 2025-11-21 |  | S<sup>(1)</sup> |  | 548000 | D | 12.1517<sup>(1)</sup> | 0 | I | See Footnotes<sup>(3)(5)(7)</sup> |
| Class A Ordinary Shares | 2025-11-21 |  | S<sup>(1)</sup> |  | 151000 | D | 12.1517<sup>(1)</sup> | 0 | I | See Footnotes<sup>(3)(6)(7)</sup> |

---

## 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 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) These Class A Ordinary Shares of Rigel Resource Acquisition Corp (the "Issuer") reported as disposed were redeemed by the Issuer as of November 21, 2025, for a redemption price of $12.151716 per Class A Ordinary Share, in connection with the Issuer's intention to dissolve and liquidate.

(2) The Duke Endowment, a charitable trust, indirectly held these Class A Ordinary Shares of the Issuer through G JBD LLC, a single member limited liability company wholly owned by The Duke Endowment. DUMAC, Inc. ("DUMAC") has been delegated voting and investment power over such Class A Ordinary Shares of the Issuer through an investment management agreement between DUMAC and The Duke Endowment and therefore DUMAC may have been deemed the beneficial owner of such Class A Ordinary Shares.

(3) DUMAC is a North Carolina non-profit corporation. DUMAC does not hold legal title to its clients' assets. The members of the board of directors of DUMAC are appointed by the executive committee of the board of trustees of Duke University.

(4) Employees' Retirement Plan of Duke University, a non-profit defined benefit plan, indirectly held these Class A Ordinary Shares of the Issuer through G ERP LLC, a single member limited liability company wholly owned by Employees' Retirement Plan of Duke University. DUMAC has been delegated voting and investment power over such Class A Ordinary Shares of the Issuer through an investment management agreement between DUMAC and Employees' Retirement Plan of Duke University and therefore DUMAC may have been deemed the beneficial owner of such Class A Ordinary Shares.

(5) Gothic Corporation ("Gothic"), a non-profit corporation, holds assets as a charitable support corporation for Duke University, including the Class A Ordinary Shares of the Issuer that were previously held. Gothic indirectly held these Class A Ordinary Shares of the Issuer through G LTP LLC, a single member limited liability company wholly owned by Gothic. The members of the board of directors of Gothic are appointed by the executive committee of the board of trustees of Duke University. DUMAC has been delegated voting and investment power over such Class A Ordinary Shares of the Issuer through an investment management agreement between DUMAC and Gothic and therefore DUMAC may have been deemed the beneficial owner of such Class A Ordinary Shares.

(6) Gothic HSP Corporation ("Gothic HSP"), a non-profit corporation, holds assets as a charitable support corporation for Duke University Health System, Inc., including the Class A Ordinary Shares of the Issuer that were previously held. Gothic HSP indirectly held these Class A Ordinary Shares of the Issuer through G HSP LLC, a single member limited liability company wholly owned by Gothic HSP. The members of the board of directors of Gothic HSP are appointed by the board of directors of Duke University Health System, Inc. The members of the board of directors of Duke University Health System, Inc. are appointed by the executive committee of the board of trustees of Duke University. DUMAC has been delegated voting and investment power over such Class A Ordinary Shares of the Issuer through an investment management agreement between DUMAC and Gothic HSP and therefore DUMAC may have been deemed the beneficial owner of such Class A Ordinary Shares.

(7) Each Reporting Person disclaims beneficial ownership of the Class A Ordinary Shares of the Issuer reported herein except to the extent of its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is or was the beneficial owner of such Class A Ordinary Shares for purposes of Section 16 or for any other purpose.

**Signature:** DUMAC, INC., Name: /s/ Robert E. McGrail, Title:  Secretary  
**Date:** 2025-12-04

**Signature:** DUKE UNIVERSITY, Name: /s/ Robert E. McGrail, Title: Secretary, DUMAC, Inc.  
**Date:** 2025-12-04

### 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.**