Joseph P. Hazelton - 01 Aug 2025 Form 4 Insider Report for DYADIC INTERNATIONAL INC (DYAI)

Role: President and COO
Signature: /s/ Ping Rawson, attorney-in-fact
Issuer symbol: DYAI
Transactions as of: 01 Aug 2025
Net transactions value: +$24,700
Form type: 4
Filing time: 05 Aug 2025, 17:00:10 UTC
Previous filing: 06 Jun 2025
Next filing: 06 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Hazelton Joseph P	President and COO	C/O DYADIC INTERNATIONAL, INC., 1044 NORTH U.S. HIGHWAY ONE, SUITE 201, JUPITER	/s/ Ping Rawson, attorney-in-fact	05 Aug 2025	0001892990

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	DYAI	Common Stock	Purchase	$24,700	+26,000	+20%	$0.9500	155,340	01 Aug 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Purchased by Mr. Hazelton from the underwriter as part of the Issuer's public offering (the "Offering") of its common stock at the public offering price, pursuant to the Issuer's effective shelf registration statement on Form S-3 (File No. 333-273829). The Offering closed on August 1, 2025.