DYAI SEC Form 4 filings
Dyadic International Inc Latest Insider Trading Activity
Over the past 2,501 days, Dyadic International Inc (DYAI) has had 21 total open-market insider transactions represented in the displayed records. The most recent transaction was on August 1, 2025, when Hazelton Joseph P (Dyadic International Inc President and COO) reported a purchase of 26,000 shares at $0.95 per share. This page shows up to the 10 most recent SEC Form 4 filing records on a 6-hour delay. Sign up for real-time updates and access to 20 years of historic insider trading data.
Insider Trading For DYAI Charted on Daily Candles. Scroll left or zoom out to load earlier candles (up to 2 years).
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| Ticker | Filing Date | Transaction Date | Company | Insider | Title | Transaction | Trade Count | Shares | Avg. Price | Total Value | Position Size Change | SEC Filing |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. DYAI | 2025-08-05 | 2025-08-01 | Dyadic International Inc | Hazelton Joseph P | President and COO | Buy | 1 | 26,000 | $0.95 | $24,700.00 | 16.74% | View Filing |
| Explained M/S: sale activity tied to share conversions or derivative-related share movements. DYAI | 2022-07-11 | 2022-07-08 | Dyadic International Inc | Tchelet Ronen | VP of Research and Bus. Dvlpmt | Sell | 2 | 8,943 | $3.49 | $31,202.49 | 100.00% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting DYAI | 2021-12-23 | 2021-12-23 | Dyadic International Inc | Emalfarb Mark A | President and CEO | Sell | 3 | 90,902 | $4.17 | $379,502.96 | 0.70% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting DYAI | 2021-06-09 | 2021-06-09 | Dyadic International Inc | Emalfarb Mark A | President and CEO | Sell | 3 | 97,000 | $3.86 | $373,960.00 | 0.75% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting DYAI | 2021-06-04 | 2021-06-04 | Dyadic International Inc | Emalfarb Mark A | President and CEO | Sell | 3 | 235,070 | $3.79 | $890,208.07 | 1.91% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. DYAI | 2021-06-04 | 2021-06-03 | Dyadic International Inc | Rawson Ping Wang | Chief Financial Officer | Buy | 4 | 11,000 | $3.73 | $41,066.34 | 18.97% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. DYAI | 2021-06-03 | 2021-06-02 | Dyadic International Inc | Rawson Ping Wang | Chief Financial Officer | Buy | 1 | 16,000 | $3.70 | $59,200.00 | 46.38% | View Filing |
| Explained M/S: sale activity tied to share conversions or derivative-related share movements. DYAI | 2019-12-12 | 2019-12-11 | Dyadic International Inc | Tchelet Ronen | VP of Research and Bus. Dvlpmt | Sell | 2 | 10,000 | $5.82 | $58,217.00 | 68.61% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. DYAI | 2019-12-05 | 2019-12-03 | Dyadic International Inc | Buckland Barry | Director | Sell | 1 | 15,000 | $6.18 | $92,700.00 | 100.00% | View Filing |
| Explained M/S: sale activity tied to share conversions or derivative-related share movements. DYAI | 2019-11-12 | 2019-11-11 | Dyadic International Inc | Tchelet Ronen | VP of Research and Bus. Dvlpmt | Sell | 1 | 10,000 | $5.99 | $59,900.00 | 100.00% | View Filing |
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