Nasdaq · CIK 0001213809
DYAI DYADIC INTERNATIONAL INC
Insider trading from SEC Form 4. Last filing Jan 6, 2026. Close $0.44 on Oct 9, 2026, +10% from the 52-week low and -70% from the high.
Last 90 days
Net insider value
$0
no open-market trades
Buys
0
$0 by 0 insiders
Sells
0
$0 by 0 insiders
Insiders on file
9
with a Form 4 at this company
Price and insider trades, last year
DYAIOct 9, 2026 · close 0.44
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at DYADIC INTERNATIONAL INC, scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 26Weak | Joseph P Hazelton President and COO buy | $25k 26,000 shares | +20% | - |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Mar 31, 2025 | Francisco Trust under agreement dated February 28, 1996 Greater than 10% holder | 215,793 0.73% of outstanding | $304k | Mar 31, 2025 | none |
| Dec 20, 2024 | Francisco Trust under agreement dated February 28, 1996 Greater than 10% holder | 295,893 1.00% of outstanding | $564k | Dec 20, 2024 | none |
Transactions
The last 71 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jan 2, 2026 | Ronen Tchelet VP of Research and Bus. Dvlpmt | AGrant or award Common Stock | +18,064 | $0.00 | $0 | 50,897 | Jan 6, 2026 |
| Jan 2, 2026 | Mark A Emalfarb CEO | AGrant or award Common Stock | +102,609 | $0.00 | $0 | 4,832,667 | Jan 6, 2026 |
| Jan 2, 2026 | Ping Wang Rawson Chief Financial Officer | AGrant or award Common Stock | +29,158 | $0.00 | $0 | 170,151 | Jan 6, 2026 |
| Jan 2, 2026 | Patrick K. Lucy director | MOption exercise Common Stock | +21,552 | - | - | 72,311 | Jan 6, 2026 |
| Jan 2, 2026 | Jack Kaye director | MOption exercise Common Stock | +21,552 | - | - | 81,201 | Jan 6, 2026 |
| Jan 2, 2026 | Seth Herbst director | MOption exercise Common Stock | +21,552 | - | - | 202,311 | Jan 6, 2026 |
| Jan 2, 2026 | Joseph P Hazelton President & COO | AGrant or award Common Stock | +36,418 | $0.00 | $0 | 191,758 | Jan 6, 2026 |
| Jan 2, 2026 | Seth Herbst director | MOption exercise Restricted Stock Unitderivative | -21,552 | $0.00 | $0 | 0 | Jan 6, 2026 |
| Jan 2, 2026 | Mark A Emalfarb CEO | AGrant or award Stock Optionderivative | +126,000 | $0.00 | $0 | 126,000 | Jan 6, 2026 |
| Jan 2, 2026 | Jack Kaye director | MOption exercise Restricted Stock Unitderivative | -21,552 | $0.00 | $0 | 0 | Jan 6, 2026 |
| Jan 2, 2026 | Ronen Tchelet VP of Research and Bus. Dvlpmt | AGrant or award Stock Optionderivative | +47,250 | $0.00 | $0 | 47,250 | Jan 6, 2026 |
| Jan 2, 2026 | Ping Wang Rawson Chief Financial Officer | AGrant or award Stock Optionderivative | +47,250 | $0.00 | $0 | 47,250 | Jan 6, 2026 |
| Jan 2, 2026 | Joseph P Hazelton President & COO | AGrant or award Stock Optionderivative | +67,250 | $0.00 | $0 | 67,250 | Jan 6, 2026 |
| Jan 2, 2026 | Patrick K. Lucy director | MOption exercise Restricted Stock Unitderivative | -21,552 | $0.00 | $0 | 0 | Jan 6, 2026 |
| Jan 2, 2026 | Seth Herbst director | AGrant or award Stock Optionderivative | +50,000 | $0.00 | $0 | 50,000 | Jan 6, 2026 |
| Jan 2, 2026 | Patrick K. Lucy director | AGrant or award Stock Optionderivative | +67,500 | $0.00 | $0 | 67,500 | Jan 6, 2026 |
| Jan 2, 2026 | Jack Kaye director | AGrant or award Stock Optionderivative | +67,500 | $0.00 | $0 | 67,500 | Jan 6, 2026 |
| Jan 2, 2026 | Seth Herbst director | AGrant or award Restricted Stock Unitderivative | +39,894 | $0.00 | $0 | 39,894 | Jan 6, 2026 |
| Jan 2, 2026 | Patrick K. Lucy director | AGrant or award Restricted Stock Unitderivative | +39,894 | $0.00 | $0 | 39,894 | Jan 6, 2026 |
| Jan 2, 2026 | Jack Kaye director | AGrant or award Restricted Stock Unitderivative | +39,894 | $0.00 | $0 | 39,894 | Jan 6, 2026 |
| Dec 23, 2025 | Mark A Emalfarb CEO | DDisposition to issuer Senior Secured Convertible Promissory Note due March 8, 2027derivativeindirect: Through Mark A Emalfarb Trust U/A/ DTD 10/1/1987 | - | - | - | 0 | Dec 29, 2025 |
| Dec 23, 2025 | Mark A Emalfarb CEO | AGrant or award Senior Secured Convertible Promissory Note due Dec 31, 2027derivativeindirect: Through Mark A Emalfarb Trust U/A/ DTD 10/1/1987 | - | - | - | - | Dec 29, 2025 |
| Sep 15, 2025 | Mark A Emalfarb CEO | POpen-market purchase Senior Secured Convertible Promissory Note due March 8, 2027derivativeindirect: Through Mark A Emalfarb Trust U/A/ DTD 10/1/1987 | - | $1,000,000.00 | - | - | Sep 17, 2025 |
| Aug 1, 2025 | Joseph P Hazelton President and COO | POpen-market purchase Common Stock | +26,000 | $0.95 | $25k | 155,340 | Aug 5, 2025 |
| Jun 20, 2025 | Arindam Bose director | MOption exercise Common Stock | +10,776 | - | - | 61,535 | Jun 24, 2025 |
| Jun 20, 2025 | Michael P. Tarnok director | MOption exercise Common Stock | +10,776 | - | - | 281,033 | Jun 24, 2025 |
| Jun 20, 2025 | Arindam Bose director | MOption exercise Restricted Stock Unitderivative | -10,776 | $0.00 | $0 | 0 | Jun 24, 2025 |
| Jun 20, 2025 | Michael P. Tarnok director | MOption exercise Restricted Stock Unitderivative | -10,776 | $0.00 | $0 | 0 | Jun 24, 2025 |
| Jun 20, 2025 | Arindam Bose director | DDisposition to issuer Restricted Stock Unitderivative | -10,776 | $0.00 | $0 | 0 | Jun 24, 2025 |
| May 30, 2025 | Joseph P Hazelton President and COO | AGrant or award Stock Optionderivative | +25,000 | $0.00 | $0 | 25,000 | Jun 6, 2025 |
| Mar 5, 2025 | Jack Kaye director | MOption exercise Common Stock | +7,500 | $1.33 | $9,975 | 64,666 | Mar 7, 2025 |
| Mar 5, 2025 | Jack Kaye director | MOption exercise Common Stock | +22,500 | $1.33 | $30k | 87,166 | Mar 7, 2025 |
| Mar 5, 2025 | Jack Kaye director | FTax withholding Common Stock | -27,517 | $1.45 | $40k | 59,649 | Mar 7, 2025 |
| Mar 5, 2025 | Jack Kaye director | MOption exercise Stock Optionderivative | -7,500 | $0.00 | $0 | 0 | Mar 7, 2025 |
| Mar 5, 2025 | Jack Kaye director | MOption exercise Stock Optionderivative | -22,500 | $0.00 | $0 | 0 | Mar 7, 2025 |
| Jan 6, 2025 | Seth Herbst director | MOption exercise Common Stock | +18,750 | $0.97 | $18k | 174,509 | Jan 8, 2025 |
| Jan 6, 2025 | Seth Herbst director | MOption exercise Common Stock | +6,250 | $0.97 | $6,063 | 180,759 | Jan 8, 2025 |
| Jan 6, 2024 | Seth Herbst director | MOption exercise Stock Optionderivative | -18,750 | $0.00 | $0 | 0 | Jan 8, 2025 |
| Jan 6, 2024 | Seth Herbst director | MOption exercise Stock Optionderivative | -6,250 | $0.00 | $0 | 0 | Jan 8, 2025 |
| Jan 2, 2025 | Seth Herbst director | MOption exercise Common Stock | +23,585 | - | - | 155,759 | Jan 7, 2025 |
| Jan 2, 2025 | Jack Kaye director | MOption exercise Common Stock | +23,585 | - | - | 57,166 | Jan 7, 2025 |
| Jan 2, 2025 | Michael P. Tarnok director | MOption exercise Common Stock | +23,585 | - | - | 270,257 | Jan 7, 2025 |
| Jan 2, 2025 | Patrick K. Lucy director | MOption exercise Common Stock | +23,585 | - | - | 50,759 | Jan 7, 2025 |
| Jan 2, 2025 | Ping Wang Rawson Chief Financial Officer | AGrant or award Common Stock | +20,776 | $0.00 | $0 | 140,993 | Jan 7, 2025 |
| Jan 2, 2025 | Joseph P Hazelton Chief Operating Officer | AGrant or award Common Stock | +30,172 | $0.00 | $0 | 129,340 | Jan 7, 2025 |
| Jan 2, 2025 | Arindam Bose director | MOption exercise Common Stock | +23,585 | - | - | 50,759 | Jan 7, 2025 |
| Jan 2, 2025 | Ronen Tchelet VP of Research and Bus. Dvlpmt | AGrant or award Common Stock | +8,980 | $0.00 | $0 | 32,833 | Jan 7, 2025 |
| Jan 2, 2025 | Mark A Emalfarb President and CEO | AGrant or award Common Stock | +73,111 | $0.00 | $0 | 4,730,058 | Jan 7, 2025 |
| Jan 2, 2025 | Michael P. Tarnok director | MOption exercise Restricted Stock Unitderivative | -23,585 | $0.00 | $0 | 0 | Jan 7, 2025 |
| Jan 2, 2025 | Arindam Bose director | MOption exercise Restricted Stock Unitderivative | -23,585 | $0.00 | $0 | 0 | Jan 7, 2025 |
| Jan 2, 2025 | Jack Kaye director | MOption exercise Restricted Stock Unitderivative | -23,585 | $0.00 | $0 | 0 | Jan 7, 2025 |
| Jan 2, 2025 | Ronen Tchelet VP of Research and Bus. Dvlpmt | AGrant or award Stock Optionderivative | +45,000 | $0.00 | $0 | 45,000 | Jan 7, 2025 |
| Jan 2, 2025 | Seth Herbst director | MOption exercise Restricted Stock Unitderivative | -23,585 | $0.00 | $0 | 0 | Jan 7, 2025 |
| Jan 2, 2025 | Mark A Emalfarb President and CEO | AGrant or award Stock Optionderivative | +172,000 | $0.00 | $0 | 172,000 | Jan 7, 2025 |
| Jan 2, 2025 | Joseph P Hazelton Chief Operating Officer | AGrant or award Stock Optionderivative | +75,000 | $0.00 | $0 | 75,000 | Jan 7, 2025 |
| Jan 2, 2025 | Ping Wang Rawson Chief Financial Officer | AGrant or award Stock Optionderivative | +64,500 | $0.00 | $0 | 64,500 | Jan 7, 2025 |
| Jan 2, 2025 | Patrick K. Lucy director | MOption exercise Restricted Stock Unitderivative | -23,585 | $0.00 | $0 | 0 | Jan 7, 2025 |
| Jan 2, 2025 | Michael P. Tarnok director | AGrant or award Stock Optionderivative | +25,000 | $0.00 | $0 | 25,000 | Jan 7, 2025 |
| Jan 2, 2025 | Arindam Bose director | AGrant or award Stock Optionderivative | +67,500 | $0.00 | $0 | 67,500 | Jan 7, 2025 |
| Jan 2, 2025 | Jack Kaye director | AGrant or award Stock Optionderivative | +67,500 | $0.00 | $0 | 67,500 | Jan 7, 2025 |
| Jan 2, 2025 | Seth Herbst director | AGrant or award Stock Optionderivative | +50,000 | $0.00 | $0 | 50,000 | Jan 7, 2025 |
| Jan 2, 2025 | Patrick K. Lucy director | AGrant or award Stock Optionderivative | +67,500 | $0.00 | $0 | 67,500 | Jan 7, 2025 |
| Jan 2, 2025 | Arindam Bose director | AGrant or award Restricted Stock Unitderivative | +21,552 | $0.00 | $0 | 21,552 | Jan 7, 2025 |
| Jan 2, 2025 | Seth Herbst director | AGrant or award Restricted Stock Unitderivative | +21,552 | $0.00 | $0 | 21,552 | Jan 7, 2025 |
| Jan 2, 2025 | Michael P. Tarnok director | AGrant or award Restricted Stock Unitderivative | +10,776 | $0.00 | $0 | 10,776 | Jan 7, 2025 |
| Jan 2, 2025 | Patrick K. Lucy director | AGrant or award Restricted Stock Unitderivative | +21,552 | $0.00 | $0 | 21,552 | Jan 7, 2025 |
| Jan 2, 2025 | Jack Kaye director | AGrant or award Restricted Stock Unitderivative | +21,552 | $0.00 | $0 | 21,552 | Jan 7, 2025 |
| Nov 22, 2024 | Michael P. Tarnok director | MOption exercise Common Stock | +6,250 | $0.97 | $6,063 | 227,922 | Nov 25, 2024 |
| Nov 22, 2024 | Michael P. Tarnok director | MOption exercise Common Stock | +18,750 | $0.97 | $18k | 246,672 | Nov 25, 2024 |
| Nov 22, 2024 | Michael P. Tarnok director | MOption exercise Stock Optionderivative | -6,250 | $0.00 | $0 | 0 | Nov 25, 2024 |
| Nov 22, 2024 | Michael P. Tarnok director | MOption exercise Stock Optionderivative | -18,750 | $0.00 | $0 | 0 | Nov 25, 2024 |
Insiders
Everyone who has filed a Form 4 here.
- Arindam Bosedirector
- Mark A EmalfarbCEO
- Seth Herbstdirector
- Joseph P HazeltonPresident & COO
- Jack Kayedirector
- Patrick K. Lucydirector
- Ping Wang RawsonChief Financial Officer
- Ronen TcheletVP of Research and Bus. Dvlpmt
- Michael P. Tarnokdirector
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.