# EDGAR Filing Document

**Accession Number:** 0001015155
**File Stem:** 0002079212-25-000024
**Filing Date:** 2025-9
**Character Count:** 6804
**Document Hash:** 85cbc1f13ac614d67d98aa6c71aae2f8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0002079212-25-000024.hdr.sgml**: 20250925

**ACCESSION NUMBER**: 0002079212-25-000024

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250925

**DATE AS OF CHANGE**: 20250925

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CHARLES & COLVARD LTD
- **CENTRAL INDEX KEY:** 0001015155
- **STANDARD INDUSTRIAL CLASSIFICATION:** JEWELRY, SILVERWARE & PLATED WARE [3910]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 561928817
- **STATE OF INCORPORATION:** NC
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-53115
- **FILM NUMBER:** 251340241

**BUSINESS ADDRESS:**
- **STREET 1:** 170 SOUTHPORT DRIVE
- **CITY:** MORRISVILLE
- **STATE:** NC
- **ZIP:** 27560
- **BUSINESS PHONE:** 9194680399

**MAIL ADDRESS:**
- **STREET 1:** 170 SOUTHPORT DRIVE
- **CITY:** MORRISVILLE
- **STATE:** NC
- **ZIP:** 27560

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** C3 INC /NC/
- **DATE OF NAME CHANGE:** 19970829
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Pham Duc Hoang
- **CENTRAL INDEX KEY:** 0002079212

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**MAIL ADDRESS:**
- **STREET 1:** 3286 VIN SANTO LN
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95148

### Attached PDF Documents

**Attachment 1:** `ex991.pdf`

_No text found in this document._

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 2)**

**CHARLES & COLVARD LTD**

*(Name of Issuer)*

**Common Stock**

*(Title of Class of Securities)*

**159765205**

*(CUSIP Number)*

**Duc Pham**<br>3286 Vin Santo Ln.<br>San Jose CA 95148<br>408-876-7071

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**09/23/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **159765205** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Pham Duc Hoang** | Name of reporting person<br>**Pham Duc Hoang** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**299900.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**532216.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**155900.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**388216.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**532216.00** | Aggregate amount beneficially owned by each reporting person<br>**532216.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**11.9%** | Percent of class represented by amount in Row (11)<br>**11.9%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock

**(b) Name of Issuer:**
CHARLES & COLVARD LTD

**(c) Address of Issuer's Principal Executive Offices:**
170 SOUTHPORT DRIVE, MORRISVILLE, NC, 27560

This Amendment relates to the Common Stock of Charles & Colvard, Ltd., the Issuer.

**Item 4. Purpose of Transaction**

On September 23, 2025, Mr. Pham formed a group within the meaning of Section 13(d)(3) with Riverstyx Capital Management, LLC; The Riverstyx Fund, LP; Riverstyx Fund GP, LLC; Benjamin O. Franklin IV; Michael R. Levin; and Lloyd M. Sems; collectively, the Reporting Persons in connection with nominating and soliciting proxies for a director slate at the Issuer 2025 annual meeting and related engagement with the Issuer and its shareholders.

**Item 5. Interest in Securities of the Issuer**

**(a)**
As of the date hereof, Mr. Pham may be deemed to beneficially own an aggregate of 532,216 shares, representing approximately 11.9% of the outstanding Common Stock (based on 4,471,453 shares outstanding as reported in the joint amendment referenced above).

**(b)**
Mr. Pham has sole voting power over 299,900 shares; voting power only (and no dispositive or economic power) over 144,000 shares pursuant to the proxy described in Item 3; sole dispositive power over 155,900 shares; and shared dispositive power over 388,216 shares. Each of the Reporting Persons may be deemed to beneficially own securities beneficially owned by other members of the group; Mr. Pham disclaims beneficial ownership of any such securities except to the extent of his pecuniary interest, if any.

**(c)**
Transactions in the last 60 days: None, except as disclosed herein.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

On September 23, 2025, Mr. Pham entered into a Joint Filing Agreement with the other Reporting Persons pursuant to Rule 13d-1(k), under which Schedule 13D and amendments thereto may be filed on behalf of each party. Mr. Pham and the Reporting Persons have also coordinated their proxy solicitation for the Issuer 2025 annual meeting, including the slate of nominees and certain voting intentions.  Separately, as described in Item 3, Mr. Pham holds an irrevocable, meeting-limited voting proxy over 144,000 shares from Don Pham; no dispositive or economic power is conferred.
The proxy agreement is Exhibit 99.2 to the Original Schedule 13D filed on August 22, 2025, and is incorporated by reference into this Amendment.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Pham Duc Hoang

**Signature:** Duc Pham

**Name/Title:** Individual

**Date:** 09/25/2025