DYADIC INTERNATIONAL INC — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Hazelton Joseph P | President and COO | Purchase | 26,000 | $0.95 | $24,700 | 155,340 | Aug 1, 2025 |
| Tarnok Michael P. | — | Option Exercise | 10,776 | — | — | 281,033 | Jun 20, 2025 |
| Bose Arindam | — | Option Exercise | 10,776 | — | — | 61,535 | Jun 20, 2025 |
| Kaye Jack | — | Option Exercise | 22,500 | $1.33 | $29,925 | 87,166 | Mar 5, 2025 |
| HERBST SETH | — | Option Exercise | 18,750 | $0.97 | $18,188 | 174,509 | Jan 6, 2025 |
| Kaye Jack | — | Option Exercise | 23,585 | — | — | 57,166 | Jan 2, 2025 |
| Tarnok Michael P. | — | Option Exercise | 23,585 | — | — | 270,257 | Jan 2, 2025 |
| HERBST SETH | — | Option Exercise | 23,585 | — | — | 155,759 | Jan 2, 2025 |
| Lucy Patrick K. | — | Option Exercise | 23,585 | — | — | 50,759 | Jan 2, 2025 |
| Rawson Ping Wang | Chief Financial Officer | Award / Grant | 20,776 | — | — | 140,993 | Jan 2, 2025 |
| Bose Arindam | — | Option Exercise | 23,585 | — | — | 50,759 | Jan 2, 2025 |
| Hazelton Joseph P | Chief Operating Officer | Award / Grant | 30,172 | — | — | 129,340 | Jan 2, 2025 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Award / Grant | 8,980 | — | — | 32,833 | Jan 2, 2025 |
| EMALFARB MARK A | President and CEO | Award / Grant | 73,111 | — | — | 4,730,058 | Jan 2, 2025 |
| Tarnok Michael P. | — | Option Exercise | 6,250 | $0.97 | $6,063 | 227,922 | Nov 22, 2024 |
| Buckland Barry | — | Option Exercise | 11,793 | $1.59 | $18,751 | 38,967 | Jun 11, 2024 |
| Tarnok Michael P. | — | Option Exercise | 7,500 | $1.36 | $10,200 | 223,603 | May 21, 2024 |
| Hazelton Joseph P | Chief Business Officer | Award / Grant | 41,720 | — | — | 99,168 | Mar 13, 2024 |
| EMALFARB MARK A | President and CEO | Award / Grant | 124,454 | — | — | 4,656,947 | Mar 13, 2024 |
| Rawson Ping Wang | Chief Financial Officer | Award / Grant | 35,366 | — | — | 120,217 | Mar 13, 2024 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Award / Grant | 11,169 | — | — | 23,853 | Mar 13, 2024 |
| Bose Arindam | — | Option Exercise | 27,174 | — | — | 27,174 | Jan 3, 2024 |
| Lucy Patrick K. | — | Option Exercise | 27,174 | — | — | 27,174 | Jan 3, 2024 |
| Buckland Barry | — | Option Exercise | 27,174 | — | — | 27,174 | Jan 3, 2024 |
| HERBST SETH | — | Option Exercise | 27,174 | — | — | 132,174 | Jan 3, 2024 |
| Tarnok Michael P. | — | Option Exercise | 27,174 | — | — | 216,103 | Jan 3, 2024 |
| Kaye Jack | — | Option Exercise | 27,174 | — | — | 33,581 | Jan 3, 2024 |
| Rawson Ping Wang | Chief Financial Officer | Award / Grant | 39,351 | $1.38 | $54,304 | 84,851 | Jan 3, 2023 |
| EMALFARB MARK A | President and CEO | Award / Grant | 138,478 | $1.38 | $191,100 | 4,532,493 | Jan 3, 2023 |
| Hazelton Joseph P | Chief Business Officer | Award / Grant | 57,448 | $1.38 | $79,278 | 57,448 | Jan 3, 2023 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Award / Grant | 12,684 | $1.38 | $17,504 | 12,684 | Jan 3, 2023 |
| Kaye Jack | — | Gift | 33,150 | — | — | 39,557 | Nov 21, 2022 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Sale | 7,854 | $3.50 | $27,489 | — | Jul 7, 2022 |
| HERBST SETH | — | Option Exercise | 25,000 | $1.21 | $30,250 | 25,000 | Jan 28, 2022 |
| EMALFARB MARK A | President and CEO | Sale | 28,767 | $4.10 | $117,945 | 4,244,015 | Dec 22, 2021 |
| Francisco Trust under agreement dated February 28, 1996 | — | Sale | 150,000 | $5.14 | $771,000 | 3,548,528 | Jul 27, 2021 |
| Francisco Trust under agreement dated February 28, 1996 | — | Sale | 150,000 | $770,983.56 | $115,647,534,000 | 3,548,528 | Jul 27, 2021 |
| EMALFARB MARK A | President and CEO | Option Exercise | 100,000 | $1.67 | $167,000 | 4,334,917 | Jun 7, 2021 |
| EMALFARB MARK A | President and CEO | Sale | 76,349 | $3.74 | $285,545 | 4,090,638 | Jun 4, 2021 |
| Rawson Ping Wang | Chief Financial Officer | Purchase | 6,156 | $3.83 | $23,577 | 6,156 | Jun 2, 2021 |
| Rawson Ping Wang | Chief Financial Officer | Purchase | 16,000 | $3.70 | $59,200 | 34,500 | Jun 2, 2021 |
| HERBST SETH | — | Option Exercise | 50,000 | $1.93 | $96,500 | 50,000 | Jan 29, 2021 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Option Exercise | 5,425 | $1.41 | $7,649 | 5,425 | Dec 11, 2019 |
| Buckland Barry | — | Option Exercise | 2,500 | $1.39 | $3,475 | 15,000 | Dec 3, 2019 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Option Exercise | 10,000 | $1.41 | $14,100 | 10,000 | Nov 11, 2019 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Option Exercise | 5,218 | $1.41 | $7,357 | 5,218 | Oct 11, 2019 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Sale | 10,000 | $5.27 | $52,700 | — | Sep 10, 2019 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Option Exercise | 6,300 | $1.41 | $8,883 | 6,300 | Aug 13, 2019 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Sale | 10,000 | $5.87 | $58,700 | — | Jul 10, 2019 |
| TCHELET RONEN | VP of Research and Bus. Dvlpmt | Option Exercise | 2,083 | $1.41 | $2,937 | 19,583 | Jun 18, 2019 |