Insider Transactions Reported by 11 Insiders of DYADIC INTERNATIONAL INC

Symbol
DYAI on Nasdaq
Location
Jupiter, FL

Insiders trading volume in the past year

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

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

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.