Insider Transactions Reported by 11 Insiders of DYADIC INTERNATIONAL INC

Symbol: DYAI on Nasdaq
Location: Jupiter, FL

Quick Takeaways

DYAI - DYADIC INTERNATIONAL INC has 11 insiders with reported activity on this page.
Net insider value flow over the last year: +$24,700.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: $24,700; sell value: $0.
Net share flow: +26,000.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Source Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to buying over the last 12 months. Net value: +$24,700.

Buys

$24,700

Shares: 26,000

Insiders: 1

Sells

Shares: 0

Insiders: 0

Net

+$24,700

Shares: +26,000

Insiders: 1

Window (months)	Buy shares	Buy $	Sell $	Net $
0-3	0	$0	$0	$0
3-6	0	$0	$0	$0
6-9	0	$0	$0	$0
9-12	26,000	$24,700	$0	+$24,700

DYADIC INTERNATIONAL INC executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Francisco Trust under agreement dated February 28, 1996	10%+ Owner	$4,896,969			Mixed	27 Jul 2021
Mark A. Emalfarb	CEO, Director, 10%+ Owner	$4,784,340			Mixed	02 Jan 2026
Michael P. Tarnok	Director	$358,933			Mixed	20 Jun 2025
Seth Herbst	Director	$221,192			Mixed	02 Jan 2026
Joseph P. Hazelton	President & COO	$189,840	+$24,700	+15%	Mixed	02 Jan 2026
Ping Wang Rawson	Chief Financial Officer	$168,449			Mixed	02 Jan 2026
Barry Buckland	Director	$127,033			Mixed	11 Jun 2024
Jack Kaye	Director	$101,293			Mixed	02 Jan 2026
Arindam Bose	Director	$97,208			Mixed	20 Jun 2025
Patrick K. Lucy	Director	$92,492			Mixed	02 Jan 2026
Ronen Tchelet	VP of Research and Bus. Dvlpmt	$50,388			Mixed	02 Jan 2026

Top shareholders of DYADIC INTERNATIONAL INC (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Mark A. Emalfarb	13D/G 3/4/5	CEO, Director, 10%+ Owner	18%	6,675,439	$6,274,913	+$405,229	31 Dec 2025	13D/G 3/4/5
Francisco Trust under agreement dated February 28, 1996	3/4/5 13D/G	10%+ Owner	12% from 13D/G	3,548,528	$4,896,969	—	27 Jul 2021	3/4/5 13D/G
APIS CAPITAL ADVISORS, LLC	13F	Company	3.9%	1,490,000	$1,400,600	—	31 Dec 2025	13F
Bandera Partners LLC	13D/G	—	4.6%	1,383,308	$1,355,642	$0	30 Jun 2025	13D/G
VANGUARD GROUP INC	13F	Company	2.4%	914,960	$860,062	—	31 Dec 2025	13F
CHAPIN DAVIS, INC.	13F	Company	2.3%	888,004	$834,726	—	31 Dec 2025	13F
Michael P. Tarnok	3/4/5	Director	— mixed-class rows	306,033 mixed-class rows	$358,933	—	20 Jun 2025	3/4/5
PERKINS CAPITAL MANAGEMENT INC	13F	Company	0.9%	344,411	$323,746	—	31 Dec 2025	13F
TRUIST FINANCIAL CORP	13F	Company	0.86%	326,200	$306,628	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.79%	301,673	$283,623	—	31 Dec 2025	13F
BlackRock, Inc.	13F	Company	0.71%	268,960	$252,823	—	31 Dec 2025	13F
Seth Herbst	3/4/5	Director	— mixed-class rows	292,205 mixed-class rows	$221,192	—	02 Jan 2026	3/4/5
Joseph P. Hazelton	3/4/5	President & COO	— mixed-class rows	259,008 mixed-class rows	$189,840	+$24,700	02 Jan 2026	3/4/5
Ping Wang Rawson	3/4/5	Chief Financial Officer	— mixed-class rows	217,401 mixed-class rows	$168,449	—	02 Jan 2026	3/4/5
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.39%	147,615	$138,758	—	31 Dec 2025	13F
Barry Buckland	3/4/5	Director	— mixed-class rows	127,934 mixed-class rows	$127,033	—	11 Jun 2024	3/4/5
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.	13F	Company	0.29%	110,062	$103,458	—	31 Dec 2025	13F
Jack Kaye	3/4/5	Director	— mixed-class rows	188,595 mixed-class rows	$101,293	—	02 Jan 2026	3/4/5
Sage Mountain Advisors LLC	13F	Company	0.28%	106,564	$100,170	—	31 Dec 2025	13F
Arindam Bose	3/4/5	Director	— mixed-class rows	129,035 mixed-class rows	$97,208	—	20 Jun 2025	3/4/5
Patrick K. Lucy	3/4/5	Director	— mixed-class rows	179,705 mixed-class rows	$92,492	—	02 Jan 2026	3/4/5
MARATHON CAPITAL MANAGEMENT	13F	Company	0.22%	85,000	$79,900	—	31 Dec 2025	13F
HighTower Advisors, LLC	13F	Company	0.21%	79,469	$74,701	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.18%	67,933	$63,857	—	31 Dec 2025	13F
AE Wealth Management LLC	13F	Company	0.14%	53,756	$50,531	—	31 Dec 2025	13F
Ronen Tchelet	3/4/5	VP of Research and Bus. Dvlpmt	— mixed-class rows	98,147 mixed-class rows	$50,388	—	02 Jan 2026	3/4/5
AlphaCore Capital LLC	13F	Company	0.13%	50,759	$47,713	—	31 Dec 2025	13F
LPL Financial LLC	13F	Company	0.12%	44,887	$42,194	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	0.11%	42,550	$39,997	—	31 Dec 2025	13F
Pekin Hardy Strauss, Inc.	13F	Company	0.11%	41,745	$39,240	—	31 Dec 2025	13F
XTX Topco Ltd	13F	Company	0.1%	36,258	$34,083	—	31 Dec 2025	13F
Inlet Private Wealth, LLC	13F	Company	0.08%	30,000	$28,200	—	31 Dec 2025	13F
Robertson Stephens Wealth Management, LLC	13F	Company	0.08%	29,969	$28,171	—	31 Dec 2025	13F
COMMONWEALTH EQUITY SERVICES, LLC	13F	Company	0.06%	22,579	$21,220	—	31 Dec 2025	13F
TWO SIGMA SECURITIES, LLC	13F	Company	0.05%	20,761	$19,515	—	31 Dec 2025	13F
CAPTRUST FINANCIAL ADVISORS	13F	Company	0.04%	15,000	$14,100	—	31 Dec 2025	13F
TRAPHAGEN INVESTMENT ADVISORS LLC	13F	Company	0.03%	13,000	$12,220	—	31 Dec 2025	13F
UBS Group AG	13F	Company	0.03%	11,487	$10,798	—	31 Dec 2025	13F
HANCOCK WHITNEY CORP	13F	Company	0.03%	11,111	$10,444	—	31 Dec 2025	13F
HOEY INVESTMENTS, INC	13F	Company	0.03%	9,847	$9,257	—	31 Dec 2025	13F
PNC FINANCIAL SERVICES GROUP, INC.	13F	Company	0.01%	4,000	$3,760	—	31 Dec 2025	13F
ROYAL BANK OF CANADA	13F	Company	0%	691	$1,000	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	0%	227	$213	—	31 Dec 2025	13F
WELLS FARGO & COMPANY/MN	13F	Company	0%	178	$168	—	31 Dec 2025	13F
SIMPLEX TRADING, LLC	13F	Company	0%	88	$82	—	31 Dec 2025	13F
BARCLAYS PLC	13F	Company	0%	72	$68	—	31 Dec 2025	13F
BNP PARIBAS FINANCIAL MARKETS	13F	Company	0%	69	$65	—	31 Dec 2025	13F
JPMORGAN CHASE & CO	13F	Company	0%	29	$27	—	31 Dec 2025	13F
BANK OF AMERICA CORP /DE/	13F	Company	0%	17	$16	—	31 Dec 2025	13F
CITIGROUP INC	13F	Company	0%	1	$1	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for DYADIC INTERNATIONAL INC

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Ronen Tchelet	DYAI	Common Stock	Award	55%			18,064	50,897	02 Jan 2026	Direct
Ronen Tchelet	DYAI	Stock Option	Award				47,250	47,250	02 Jan 2026	Direct
Ping Wang Rawson	DYAI	Common Stock	Award	20.7%			29,158	170,151	02 Jan 2026	Direct
Ping Wang Rawson	DYAI	Stock Option	Award				47,250	47,250	02 Jan 2026	Direct
Patrick K. Lucy	DYAI	Common Stock	Options Exercise	42.5%			21,552	72,311	02 Jan 2026	Direct
Patrick K. Lucy	DYAI	Restricted Stock Unit	Award				39,894	39,894	02 Jan 2026	Direct
Patrick K. Lucy	DYAI	Stock Option	Award				67,500	67,500	02 Jan 2026	Direct
Patrick K. Lucy	DYAI	Restricted Stock Unit	Options Exercise	-100%			-21,552	0	02 Jan 2026	Direct
Jack Kaye	DYAI	Common Stock	Options Exercise	36.1%			21,552	81,201	02 Jan 2026	Direct
Jack Kaye	DYAI	Restricted Stock Unit	Award				39,894	39,894	02 Jan 2026	Direct
Jack Kaye	DYAI	Stock Option	Award				67,500	67,500	02 Jan 2026	Direct
Jack Kaye	DYAI	Restricted Stock Unit	Options Exercise	-100%			-21,552	0	02 Jan 2026	Direct
Seth Herbst	DYAI	Common Stock	Options Exercise	11.9%			21,552	202,311	02 Jan 2026	Direct
Seth Herbst	DYAI	Restricted Stock Unit	Award				39,894	39,894	02 Jan 2026	Direct
Seth Herbst	DYAI	Stock Option	Award				50,000	50,000	02 Jan 2026	Direct
Seth Herbst	DYAI	Restricted Stock Unit	Options Exercise	-100%			-21,552	0	02 Jan 2026	Direct
Joseph P. Hazelton	DYAI	Common Stock	Award	23.4%			36,418	191,758	02 Jan 2026	Direct
Joseph P. Hazelton	DYAI	Stock Option	Award				67,250	67,250	02 Jan 2026	Direct
Mark A. Emalfarb	DYAI	Common Stock	Award	2.17%			102,609	4,832,667	02 Jan 2026	Direct
Mark A. Emalfarb	DYAI	Stock Option	Award				126,000	126,000	02 Jan 2026	Direct
Mark A. Emalfarb	DYAI	Senior Secured Convertible Promissory Note due Dec 31, 2027	Award				0	$1,000,000	23 Dec 2025	Through Mark A Emalfarb Trust U/A/ DTD 10/1/1987
Mark A. Emalfarb	DYAI	Senior Secured Convertible Promissory Note due March 8, 2027	Disposed to Issuer				0	0	23 Dec 2025	Through Mark A Emalfarb Trust U/A/ DTD 10/1/1987
Mark A. Emalfarb	DYAI	Senior Secured Convertible Promissory Note due March 8, 2027	Purchase				0	$1,000,000	15 Sep 2025	Through Mark A Emalfarb Trust U/A/ DTD 10/1/1987
Joseph P. Hazelton	DYAI	Common Stock	Purchase	20.1%	$24,700	$0.9500	26,000	155,340	01 Aug 2025	Direct
Michael P. Tarnok	DYAI	Common Stock	Options Exercise	3.99%			10,776	281,033	20 Jun 2025	Direct
Michael P. Tarnok	DYAI	Restricted Stock Unit	Options Exercise	-100%			-10,776	0	20 Jun 2025	Direct
Arindam Bose	DYAI	Common Stock	Options Exercise	21.2%			10,776	61,535	20 Jun 2025	Direct
Arindam Bose	DYAI	Restricted Stock Unit	Disposed to Issuer	-100%			-10,776	0	20 Jun 2025	Direct
Arindam Bose	DYAI	Restricted Stock Unit	Options Exercise	-100%			-10,776	0	20 Jun 2025	Direct
Joseph P. Hazelton	DYAI	Stock Option	Award				25,000	25,000	30 May 2025	Direct

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