In the last 12 months, insiders at DYADIC INTERNATIONAL INC ($DYAI) filed 116 transactions with the SEC: 2 open-market purchases totaling $1,024,700 and 0 sales totaling $0. Net insider sentiment: net buying.
DYADIC INTERNATIONAL INC operates in the Biological products, (no disgnostic substances) industry (Life sciences sector).
Most Active Insiders
- EMALFARB MARK A (CEO) — 5 transactions totaling $1,000,000
- Tarnok Michael P. (Director) — 22 transactions totaling $105,850
- Kaye Jack (Director) — 17 transactions totaling $79,800
- Hazelton Joseph P (President and COO) — 2 transactions totaling $24,700
- HERBST SETH (Director) — 16 transactions totaling $24,250
View all SEC Filings for DYADIC INTERNATIONAL INC (DYAI).
Set Up your own filters →Recent Insider Transactions
| Transaction Date | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 2, 2026 | TCHELET RONEN | VP of Research and Bus. Dvlpmt | A | Stock Option | 47250 | $0.00 | 47,250.0000 | 36,187,798 | 9999.99% | 0.13% |
| Jan. 2, 2026 | HERBST SETH | Director | A | Restricted Stock Unit | 39894 | $0.00 | 39,894.0000 | 36,187,798 | 9999.99% | 0.11% |
| Jan. 2, 2026 | HERBST SETH | Director | A | Stock Option | 50000 | $0.00 | 50,000.0000 | 36,187,798 | 9999.99% | 0.14% |
| Jan. 2, 2026 | HERBST SETH | Director | M | Restricted Stock Unit | 21552 | $0.00 | 0.0000 | 36,187,798 | 100.00% | 0.06% |
| Jan. 2, 2026 | HERBST SETH | Director | M | Common Stock | 21552 | $0.00 | 202,311.0000 | 36,187,798 | 11.92% | 0.06% |
| Jan. 2, 2026 | Kaye Jack | Director | A | Restricted Stock Unit | 39894 | $0.00 | 39,894.0000 | 36,187,798 | 9999.99% | 0.11% |
| Jan. 2, 2026 | Kaye Jack | Director | A | Stock Option | 67500 | $0.00 | 67,500.0000 | 36,187,798 | 9999.99% | 0.19% |
| Jan. 2, 2026 | Kaye Jack | Director | M | Restricted Stock Unit | 21552 | $0.00 | 0.0000 | 36,187,798 | 100.00% | 0.06% |
| Jan. 2, 2026 | Kaye Jack | Director | M | Common Stock | 21552 | $0.00 | 81,201.0000 | 36,187,798 | 36.13% | 0.06% |
| Jan. 2, 2026 | Lucy Patrick K. | Director | A | Restricted Stock Unit | 39894 | $0.00 | 39,894.0000 | 36,187,798 | 9999.99% | 0.11% |
| Jan. 2, 2026 | Lucy Patrick K. | Director | A | Stock Option | 67500 | $0.00 | 67,500.0000 | 36,187,798 | 9999.99% | 0.19% |
| Jan. 2, 2026 | Lucy Patrick K. | Director | M | Restricted Stock Unit | 21552 | $0.00 | 0.0000 | 36,187,798 | 100.00% | 0.06% |
| Jan. 2, 2026 | Lucy Patrick K. | Director | M | Common Stock | 21552 | $0.00 | 72,311.0000 | 36,187,798 | 42.46% | 0.06% |
| Jan. 2, 2026 | Rawson Ping Wang | Chief Financial Officer | A | Stock Option | 47250 | $0.00 | 47,250.0000 | 36,187,798 | 9999.99% | 0.13% |
| Jan. 2, 2026 | Rawson Ping Wang | Chief Financial Officer | A | Common Stock | 29158 | $0.00 | 170,151.0000 | 36,187,798 | 20.68% | 0.08% |
| Jan. 2, 2026 | TCHELET RONEN | VP of Research and Bus. Dvlpmt | A | Common Stock | 18064 | $0.00 | 50,897.0000 | 36,187,798 | 55.02% | 0.05% |
| Jan. 2, 2026 | EMALFARB MARK A | CEO | A | Stock Option | 126000 | $0.00 | 126,000.0000 | 36,187,798 | 9999.99% | 0.35% |
| Jan. 2, 2026 | EMALFARB MARK A | CEO | A | Common Stock | 102609 | $0.00 | 4,832,667.0000 | 36,187,798 | 2.17% | 0.28% |
| Jan. 2, 2026 | Hazelton Joseph P | President & COO | A | Stock Option | 67250 | $0.00 | 67,250.0000 | 36,187,798 | 9999.99% | 0.19% |
| Jan. 2, 2026 | Hazelton Joseph P | President & COO | A | Common Stock | 36418 | $0.00 | 191,758.0000 | 36,187,798 | 23.44% | 0.10% |
| Dec. 23, 2025 | EMALFARB MARK A | CEO | A | Senior Secured Convertible Promissory Note due Dec 31, 2027 | 1000000 | $0.00 | 1,000,000.0000 | 36,187,798 | 9999.99% | 2.76% |
| Dec. 23, 2025 | EMALFARB MARK A | CEO | D | Senior Secured Convertible Promissory Note due March 8, 2027 | 1000000 | $0.00 | 0.0000 | 36,187,798 | 100.00% | 2.76% |
| Sept. 15, 2025 | EMALFARB MARK A | CEO | P | Senior Secured Convertible Promissory Note due March 8, 2027 | 1000000 | $1000000.00 | 1,000,000.0000 | 29,835,799 | 9999.99% | 3.35% |
| Aug. 1, 2025 | Hazelton Joseph P | President and COO | P | Common Stock | 26000 | $0.95 | 155,340.0000 | 29,835,799 | 20.10% | 0.09% |
| June 20, 2025 | Bose Arindam | Director | M | Common Stock | 10776 | $0.00 | 61,535.0000 | 29,835,799 | 21.23% | 0.04% |
| June 20, 2025 | Bose Arindam | Director | M | Restricted Stock Unit | 10776 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.04% |
| June 20, 2025 | Bose Arindam | Director | D | Restricted Stock Unit | 10776 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.04% |
| June 20, 2025 | Tarnok Michael P. | Director | M | Common Stock | 10776 | $0.00 | 281,033.0000 | 29,835,799 | 3.99% | 0.04% |
| June 20, 2025 | Tarnok Michael P. | Director | M | Restricted Stock Unit | 10776 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.04% |
| May 30, 2025 | Hazelton Joseph P | President and COO | A | Stock Option | 25000 | $0.00 | 25,000.0000 | 29,835,799 | 9999.99% | 0.08% |
| March 5, 2025 | Kaye Jack | Director | M | Stock Option | 7500 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.03% |
| March 5, 2025 | Kaye Jack | Director | M | Stock Option | 22500 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.08% |
| March 5, 2025 | Kaye Jack | Director | M | Common Stock | 7500 | $1.33 | 64,666.0000 | 29,835,799 | 13.12% | 0.03% |
| March 5, 2025 | Kaye Jack | Director | M | Common Stock | 22500 | $1.33 | 87,166.0000 | 29,835,799 | 34.79% | 0.08% |
| March 5, 2025 | Kaye Jack | Director | F | Common Stock | 27517 | $1.45 | 59,649.0000 | 29,835,799 | 31.57% | 0.09% |
| Jan. 6, 2024 | HERBST SETH | Director | M | Stock Option | 18750 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.07% |
| Jan. 6, 2025 | HERBST SETH | Director | M | Common Stock | 18750 | $0.97 | 174,509.0000 | 29,835,799 | 12.04% | 0.06% |
| Jan. 6, 2025 | HERBST SETH | Director | M | Common Stock | 6250 | $0.97 | 180,759.0000 | 29,835,799 | 3.58% | 0.02% |
| Jan. 6, 2024 | HERBST SETH | Director | M | Stock Option | 6250 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.02% |
| Jan. 2, 2025 | Bose Arindam | Director | M | Restricted Stock Unit | 23585 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.08% |
| Jan. 2, 2025 | Bose Arindam | Director | A | Restricted Stock Unit | 21552 | $0.00 | 21,552.0000 | 29,835,799 | 9999.99% | 0.07% |
| Jan. 2, 2025 | Hazelton Joseph P | Chief Operating Officer | A | Common Stock | 30172 | $0.00 | 129,340.0000 | 29,835,799 | 30.43% | 0.10% |
| Jan. 2, 2025 | EMALFARB MARK A | President and CEO | A | Common Stock | 73111 | $0.00 | 4,730,058.0000 | 29,835,799 | 1.57% | 0.25% |
| Jan. 2, 2025 | EMALFARB MARK A | President and CEO | A | Stock Option | 172000 | $0.00 | 172,000.0000 | 29,835,799 | 9999.99% | 0.58% |
| Jan. 2, 2025 | Rawson Ping Wang | Chief Financial Officer | A | Common Stock | 20776 | $0.00 | 140,993.0000 | 29,835,799 | 17.28% | 0.07% |
| Jan. 2, 2025 | Rawson Ping Wang | Chief Financial Officer | A | Stock Option | 64500 | $0.00 | 64,500.0000 | 29,835,799 | 9999.99% | 0.22% |
| Jan. 2, 2025 | Bose Arindam | Director | M | Common Stock | 23585 | $0.00 | 50,759.0000 | 29,835,799 | 86.79% | 0.08% |
| Jan. 2, 2025 | Bose Arindam | Director | A | Stock Option | 67500 | $0.00 | 67,500.0000 | 29,835,799 | 9999.99% | 0.23% |
| Jan. 2, 2025 | Hazelton Joseph P | Chief Operating Officer | A | Stock Option | 75000 | $0.00 | 75,000.0000 | 29,835,799 | 9999.99% | 0.25% |
| Jan. 2, 2025 | TCHELET RONEN | VP of Research and Bus. Dvlpmt | A | Common Stock | 8980 | $0.00 | 32,833.0000 | 29,835,799 | 37.65% | 0.03% |
| Jan. 2, 2025 | TCHELET RONEN | VP of Research and Bus. Dvlpmt | A | Stock Option | 45000 | $0.00 | 45,000.0000 | 29,835,799 | 9999.99% | 0.15% |
| Jan. 2, 2025 | Kaye Jack | Director | M | Common Stock | 23585 | $0.00 | 57,166.0000 | 29,835,799 | 70.23% | 0.08% |
| Jan. 2, 2025 | Kaye Jack | Director | M | Restricted Stock Unit | 23585 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.08% |
| Jan. 2, 2025 | Kaye Jack | Director | A | Stock Option | 67500 | $0.00 | 67,500.0000 | 29,835,799 | 9999.99% | 0.23% |
| Jan. 2, 2025 | Kaye Jack | Director | A | Restricted Stock Unit | 21552 | $0.00 | 21,552.0000 | 29,835,799 | 9999.99% | 0.07% |
| Jan. 2, 2025 | Tarnok Michael P. | Director | M | Common Stock | 23585 | $0.00 | 270,257.0000 | 29,835,799 | 9.56% | 0.08% |
| Jan. 2, 2025 | Tarnok Michael P. | Director | M | Restricted Stock Unit | 23585 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.08% |
| Jan. 2, 2025 | Tarnok Michael P. | Director | A | Stock Option | 25000 | $0.00 | 25,000.0000 | 29,835,799 | 9999.99% | 0.08% |
| Jan. 2, 2025 | Tarnok Michael P. | Director | A | Restricted Stock Unit | 10776 | $0.00 | 10,776.0000 | 29,835,799 | 9999.99% | 0.04% |
| Jan. 2, 2025 | HERBST SETH | Director | M | Common Stock | 23585 | $0.00 | 155,759.0000 | 29,835,799 | 17.84% | 0.08% |
| Jan. 2, 2025 | HERBST SETH | Director | M | Restricted Stock Unit | 23585 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.08% |
| Jan. 2, 2025 | HERBST SETH | Director | A | Stock Option | 50000 | $0.00 | 50,000.0000 | 29,835,799 | 9999.99% | 0.17% |
| Jan. 2, 2025 | HERBST SETH | Director | A | Restricted Stock Unit | 21552 | $0.00 | 21,552.0000 | 29,835,799 | 9999.99% | 0.07% |
| Jan. 2, 2025 | Lucy Patrick K. | Director | M | Common Stock | 23585 | $0.00 | 50,759.0000 | 29,835,799 | 86.79% | 0.08% |
| Jan. 2, 2025 | Lucy Patrick K. | Director | M | Restricted Stock Unit | 23585 | $0.00 | 0.0000 | 29,835,799 | 100.00% | 0.08% |
| Jan. 2, 2025 | Lucy Patrick K. | Director | A | Stock Option | 67500 | $0.00 | 67,500.0000 | 29,835,799 | 9999.99% | 0.23% |
| Jan. 2, 2025 | Lucy Patrick K. | Director | A | Restricted Stock Unit | 21552 | $0.00 | 21,552.0000 | 29,835,799 | 9999.99% | 0.07% |
| Nov. 22, 2024 | Tarnok Michael P. | Director | M | Common Stock | 6250 | $0.97 | 227,922.0000 | 28,811,061 | 2.82% | 0.02% |
| Nov. 22, 2024 | Tarnok Michael P. | Director | M | Common Stock | 18750 | $0.97 | 246,672.0000 | 28,811,061 | 8.23% | 0.07% |
| Nov. 22, 2024 | Tarnok Michael P. | Director | M | Stock Option | 6250 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.02% |
| Nov. 22, 2024 | Tarnok Michael P. | Director | M | Stock Option | 18750 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.07% |
| June 11, 2024 | Buckland Barry | Director | M | Common Stock | 11793 | $1.59 | 38,967.0000 | 28,811,061 | 43.40% | 0.04% |
| June 11, 2024 | Buckland Barry | Director | M | Restricted Stock Unit | 11793 | $0.00 | 38,967.0000 | 28,811,061 | 23.23% | 0.04% |
| June 11, 2024 | Buckland Barry | Director | D | Restricted Stock Unit | 11792 | $0.00 | 38,967.0000 | 28,811,061 | 23.23% | 0.04% |
| May 21, 2024 | Tarnok Michael P. | Director | M | Common Stock | 7500 | $1.36 | 223,603.0000 | 28,811,061 | 3.47% | 0.03% |
| May 21, 2024 | Tarnok Michael P. | Director | M | Stock Option | 16875 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.06% |
| May 21, 2024 | Tarnok Michael P. | Director | M | Stock Option | 5625 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.02% |
| May 21, 2024 | Tarnok Michael P. | Director | M | Stock Option | 7500 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.03% |
| May 21, 2024 | Tarnok Michael P. | Director | F | Common Stock | 24431 | $1.67 | 221,672.0000 | 28,811,061 | 9.93% | 0.08% |
| May 21, 2024 | Tarnok Michael P. | Director | M | Common Stock | 16875 | $1.36 | 246,103.0000 | 28,811,061 | 7.36% | 0.06% |
| May 21, 2024 | Tarnok Michael P. | Director | M | Common Stock | 5625 | $1.36 | 229,228.0000 | 28,811,061 | 2.52% | 0.02% |
| March 13, 2024 | TCHELET RONEN | VP of Research and Bus. Dvlpmt | A | Common Stock | 11169 | $0.00 | 23,853.0000 | 28,811,061 | 88.06% | 0.04% |
| March 13, 2024 | Rawson Ping Wang | Chief Financial Officer | A | Common Stock | 35366 | $0.00 | 120,217.0000 | 28,811,061 | 41.68% | 0.12% |
| March 13, 2024 | EMALFARB MARK A | President and CEO | A | Common Stock | 124454 | $0.00 | 4,656,947.0000 | 28,811,061 | 2.75% | 0.43% |
| March 13, 2024 | Hazelton Joseph P | Chief Business Officer | A | Common Stock | 41720 | $0.00 | 99,168.0000 | 28,811,061 | 72.62% | 0.14% |
| April 11, 2024 | Hazelton Joseph P | Chief Business Officer | A | Stock Option | 20000 | $0.00 | 20,000.0000 | 28,811,061 | 9999.99% | 0.07% |
| April 11, 2024 | Tarnok Michael P. | Director | D | Stock Option | 13125 | $0.00 | 54,375.0000 | 28,811,061 | 19.44% | 0.05% |
| April 11, 2024 | Lucy Patrick K. | Director | A | Stock Option | 13125 | $0.00 | 13,125.0000 | 28,811,061 | 9999.99% | 0.05% |
| Jan. 3, 2024 | Tarnok Michael P. | Director | M | Restricted Stock Unit | 27174 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.09% |
| Jan. 3, 2024 | Kaye Jack | Director | M | Common Stock | 27174 | $0.00 | 33,581.0000 | 28,811,061 | 424.13% | 0.09% |
| Jan. 2, 2024 | Kaye Jack | Director | A | Stock Option | 67500 | $0.00 | 67,500.0000 | 28,811,061 | 9999.99% | 0.23% |
| Jan. 2, 2024 | Kaye Jack | Director | A | Restricted Stock Unit | 23585 | $0.00 | 23,585.0000 | 28,811,061 | 9999.99% | 0.08% |
| Jan. 3, 2024 | Kaye Jack | Director | M | Restricted Stock Unit | 27174 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.09% |
| Jan. 3, 2024 | Lucy Patrick K. | Director | M | Common Stock | 27174 | $0.00 | 27,174.0000 | 28,811,061 | 9999.99% | 0.09% |
| Jan. 2, 2024 | TCHELET RONEN | VP of Research and Bus. Dvlpmt | A | Stock Option | 37500 | $0.00 | 37,500.0000 | 28,811,061 | 9999.99% | 0.13% |
| Jan. 2, 2024 | Rawson Ping Wang | Chief Financial Officer | A | Stock Option | 75000 | $0.00 | 75,000.0000 | 28,811,061 | 9999.99% | 0.26% |
| Jan. 2, 2024 | Hazelton Joseph P | Chief Business Officer | A | Stock Option | 75000 | $0.00 | 75,000.0000 | 28,811,061 | 9999.99% | 0.26% |
| Jan. 2, 2024 | EMALFARB MARK A | President and CEO | A | Stock Option | 200000 | $0.00 | 200,000.0000 | 28,811,061 | 9999.99% | 0.69% |
| Jan. 3, 2024 | Bose Arindam | Director | M | Restricted Stock Unit | 27174 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.09% |
| Jan. 2, 2024 | Bose Arindam | Director | A | Restricted Stock Unit | 23585 | $0.00 | 23,585.0000 | 28,811,061 | 9999.99% | 0.08% |
| Jan. 2, 2024 | Lucy Patrick K. | Director | A | Stock Option | 50000 | $0.00 | 50,000.0000 | 28,811,061 | 9999.99% | 0.17% |
| Jan. 3, 2024 | Bose Arindam | Director | M | Common Stock | 27174 | $0.00 | 27,174.0000 | 28,811,061 | 9999.99% | 0.09% |
| Jan. 2, 2024 | Bose Arindam | Director | A | Stock Option | 67500 | $0.00 | 67,500.0000 | 28,811,061 | 9999.99% | 0.23% |
| Jan. 2, 2024 | Lucy Patrick K. | Director | A | Restricted Stock Unit | 23585 | $0.00 | 23,585.0000 | 28,811,061 | 9999.99% | 0.08% |
| Jan. 3, 2024 | Lucy Patrick K. | Director | M | Restricted Stock Unit | 27174 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.09% |
| Jan. 3, 2024 | Buckland Barry | Director | M | Common Stock | 27174 | $0.00 | 27,174.0000 | 28,811,061 | 9999.99% | 0.09% |
| Jan. 2, 2024 | Buckland Barry | Director | A | Stock Option | 50000 | $0.00 | 50,000.0000 | 28,811,061 | 9999.99% | 0.17% |
| Jan. 2, 2024 | Buckland Barry | Director | A | Restricted Stock Unit | 23585 | $0.00 | 23,585.0000 | 28,811,061 | 9999.99% | 0.08% |
| Jan. 3, 2024 | Buckland Barry | Director | M | Restricted Stock Unit | 27174 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.09% |
| Jan. 3, 2024 | HERBST SETH | Director | M | Common Stock | 27174 | $0.00 | 132,174.0000 | 28,811,061 | 25.88% | 0.09% |
| Jan. 2, 2024 | HERBST SETH | Director | A | Stock Option | 50000 | $0.00 | 50,000.0000 | 28,811,061 | 9999.99% | 0.17% |
| Jan. 2, 2024 | HERBST SETH | Director | A | Restricted Stock Unit | 23585 | $0.00 | 23,585.0000 | 28,811,061 | 9999.99% | 0.08% |
| Jan. 3, 2024 | HERBST SETH | Director | M | Restricted Stock Unit | 27174 | $0.00 | 0.0000 | 28,811,061 | 100.00% | 0.09% |
| Jan. 3, 2024 | Tarnok Michael P. | Director | M | Common Stock | 27174 | $0.00 | 216,103.0000 | 28,811,061 | 14.38% | 0.09% |
| Jan. 2, 2024 | Tarnok Michael P. | Director | A | Stock Option | 67500 | $0.00 | 67,500.0000 | 28,811,061 | 9999.99% | 0.23% |
| Jan. 2, 2024 | Tarnok Michael P. | Director | A | Restricted Stock Unit | 23585 | $0.00 | 23,585.0000 | 28,811,061 | 9999.99% | 0.08% |