# EDGAR Filing Document

**Accession Number:** 0001328287
**File Stem:** 0001493152-25-023646
**Filing Date:** 2025-11
**Character Count:** 7944
**Document Hash:** 130a70e5783162cb14baae748b883ccb
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-25-023646.hdr.sgml**: 20251114

**ACCESSION NUMBER**: 0001493152-25-023646

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

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251114

**DATE AS OF CHANGE**: 20251114

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DYADIC INTERNATIONAL INC
- **CENTRAL INDEX KEY:** 0001213809
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 450486747
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-80718
- **FILM NUMBER:** 251488282

**BUSINESS ADDRESS:**
- **STREET 1:** 1044 NORTH U.S. HIGHWAY ONE
- **STREET 2:** SUITE 201
- **CITY:** JUPITER
- **STATE:** FL
- **ZIP:** 33477
- **BUSINESS PHONE:** 561-743-8333

**MAIL ADDRESS:**
- **STREET 1:** 1044 NORTH U.S. HIGHWAY ONE
- **STREET 2:** SUITE 201
- **CITY:** JUPITER
- **STATE:** FL
- **ZIP:** 33477

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CCP WORLDWIDE INC
- **DATE OF NAME CHANGE:** 20030110
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** EMALFARB MARK A
- **CENTRAL INDEX KEY:** 0001328287

**ORGANIZATION NAME:**

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

**MAIL ADDRESS:**
- **STREET 1:** C/O DYADIC INTERNATIONAL, INC.
- **STREET 2:** 140 INTRACOASTAL POINT DRIVE, SUITE 404
- **CITY:** JUPITER
- **STATE:** FL
- **ZIP:** 33477-5094

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

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**(Amendment No. 4)**

**Issuer:** DYADIC INTERNATIONAL INC.

**Title of Class of Securities:** Common Stock

**CUSIP Number:** 26745T101

**Date of Event Which Requires Filing of this Statement:** 09/30/2025

**Check the appropriate box to designate the rule pursuant to which this Schedule is filed:**

- [ ] Rule 13d-1(b)

- [ ] Rule 13d-1(c)

- [x] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>Mark A. Emalfarb | Names of Reporting Persons<br>Mark A. Emalfarb |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>X1 | Citizenship or Place of Organization<br>X1 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>6244344.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>6244344.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>6244344.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>6244344.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>16.6% | Percent of Class Represented by Amount in Row (9)<br>16.6% |
| 12. | Type of Reporting Person (See Instructions)<br>IN | Type of Reporting Person (See Instructions)<br>IN |

**Comment for Type of Reporting Person:** Includes (i) 800,000 shares of common stock underlying options present exercisable, (ii) 4,730,058 shares held through the MAE Trust U/A/D October 1, 1987 (the "MAE Trust"), and (iii) 714,286 shares underlying an 8.0% Senior Secured Convertible Promissory Note due March 8, 2027, convertible at any time at the holder's option (the "Convertible Note"), held through the MAE Trust. Mr. Emalfarb is the sole beneficiary and sole trustee of, and has sole voting and dispositive power over all shares held or otherwise owned through, the MAE Trust. The Convertible Notes are senior, secured obligations of the Issuer and its affiliates, and interest is payable quarterly in cash on the principal amount equal to 8% per annum. The Convertible Notes will mature on March 8, 2027, unless earlier converted, repurchased, or redeemed in accordance with their terms. The Convertible Notes have a conversion price of $1.40 per share of common stock. The ownership percentage is based on 36,187,798 shares of common stock of the Issuer outstanding as of November 14, 2025, as reported by the Issuer to Mr. Emalfarb.

---

**Item 1(a). Name of Issuer:**
DYADIC INTERNATIONAL INC.

**Item 1(b). Address of Issuer's Principal Executive Offices:**
1044 North U.S. Highway One, Suite 201 Jupiter Florida 33477

**Item 2(a). Name of Person Filing:**
Mark A. Emalfarb

**Item 2(b). Address of Principal Business Office:**
1044 North U.S. Highway One, Suite 201, Jupiter, Florida, 33447

**Item 2(c). Citizenship:**
United States of America

**Item 2(d). Title of Class of Securities:**
Common Stock

**Item 2(e). CUSIP Number:**
26745T101

**Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:**

(a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d) [ ] Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e) [ ] An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f) [ ] An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g) [ ] A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) [ ] A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), if filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:

(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

**Item 4. Ownership:**

**(a) Amount beneficially owned:**

6,244,344

**(b) Percent of class:**

16.6%

**(c) Number of shares as to which the person has:**

**(i) Sole power to vote or to direct the vote:**

6,244,344

**(ii) Shared power to vote or to direct the vote:**

0

**(iii) Sole power to dispose or to direct the disposition of:**

6,244,344

**(iv) Shared power to dispose or to direct the disposition of:**

0

**Item 5. Ownership of Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not Applicable

**Item 7. Identification and Classification of the Subsidiary**

Not Applicable

**Item 8. Identification and Classification of Members of the Group**

Not Applicable

**Item 9. Notice of Dissolution of Group**

Not Applicable

**Item 10. Certification:**

—

### 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.

**Mark A. Emalfarb**

**Date:** 11/14/2025

**By:** /s/ Mark Emalfarb

**Name & Title:** Self