DYADIC INTERNATIONAL INC (DYAI)
Data as of , from SEC Form 4 filings.
Net insider selling (90d)Watch DYAI
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About DYADIC INTERNATIONAL INC (DYAI)
The SEC lists DYADIC INTERNATIONAL INC under CIK 0001213809, in biological products (no diagnostic substances). It is grouped with Health Care companies on this site. A registration statement was filed on 11 September 2026. No offering has priced.
DYAI Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 3 | 95,392 | $125K |
DYAI insider transactions (Form 4)
4716 Form 4 filings on record, the earliest from Nov 25, 2024, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 38,016 | $1.33 | $50K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 54,760 | $1.30 | $71K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 2,616 | $1.21 | $3K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 26,340 | $2.43 | $64K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 25,281 | $1.87 | $47K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 41,143 | $1.84 | $76K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 5,100 | $1.80 | $9K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 40,000 | $1.98 | $79K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 20,000 | $1.92 | $38K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market sale | Common Stock | 15,000 | $2.01 | $30K | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Open-market purchase | Common Stock | 558,659 footnote F1 | $0.00 | - | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Other | Common Stock | 155,627 footnote F3 | $0.00 | - | |
| Francisco Trust under agreement dated February 28, 1996 - 10% Owner | Other | Common Stock | 238,095 footnote F4 | $0.00 | - | |
| ||||||
 Ronen Tchelet - Officer | Grant or award | Common Stock | 18,064 | $0.00 | - | |
| Ronen Tchelet - Officer | Grant or award | Stock Option | 47,250 | $0.00 | - | |
 Ping Wang Rawson - Officer | Grant or award | Common Stock | 29,158 | $0.00 | - | |
| Ping Wang Rawson - Officer | Grant or award | Stock Option | 47,250 | $0.00 | - | |
| Patrick K. Lucy - Director | Option exercise | Common Stock | 21,552 | - | - | |
| Patrick K. Lucy - Director | Option exercise | Restricted Stock Unit | 21,552 | $0.00 | - | |
| Patrick K. Lucy - Director | Grant or award | Stock Option | 67,500 | $0.00 | - | |
| Patrick K. Lucy - Director | Grant or award | Restricted Stock Unit | 39,894 | $0.00 | - | |
| Jack Kaye - Director | Option exercise | Common Stock | 21,552 | - | - | |
| Jack Kaye - Director | Option exercise | Restricted Stock Unit | 21,552 | $0.00 | - | |
| Jack Kaye - Director | Grant or award | Stock Option | 67,500 | $0.00 | - | |
| Jack Kaye - Director | Grant or award | Restricted Stock Unit | 39,894 | $0.00 | - | |
| Seth Herbst - Director | Option exercise | Common Stock | 21,552 | - | - | |
| Seth Herbst - Director | Option exercise | Restricted Stock Unit | 21,552 | $0.00 | - | |
| Seth Herbst - Director | Grant or award | Stock Option | 50,000 | $0.00 | - | |
| Seth Herbst - Director | Grant or award | Restricted Stock Unit | 39,894 | $0.00 | - | |
| Joseph P. Hazelton - Officer | Grant or award | Common Stock | 36,418 | $0.00 | - | |
| Joseph P. Hazelton - Officer | Grant or award | Stock Option | 67,250 | $0.00 | - | |
| Mark A. Emalfarb - Officer | Grant or award | Common Stock | 102,609 | $0.00 | - | |
| Mark A. Emalfarb - Officer | Grant or award | Stock Option | 126,000 | $0.00 | - | |
| Mark A. Emalfarb - Officer | Derivative | Senior Secured Convertible Promissory Note due March 8, 2027 | 0 | - footnote F1 | - footnote F1 | |
| Mark A. Emalfarb - Officer | Grant or award | Senior Secured Convertible Promissory Note due Dec 31, 2027 | 0 | - footnote F1 | - footnote F1 | |
| ||||||
| Mark A. Emalfarb - Officer | Open-market purchase | Senior Secured Convertible Promissory Note due March 8, 2027 | 0 | $1,000,000.00 | - | |
| Joseph P. Hazelton - Officer | Open-market purchase | Common Stock | 26,000 | $0.95 | $25K | |
| Michael P. Tarnok - Director | Option exercise | Common Stock | 10,776 | - | - | |
| Michael P. Tarnok - Director | Option exercise | Restricted Stock Unit | 10,776 | $0.00 | - | |
| Arindam Bose - Director | Option exercise | Common Stock | 10,776 | - | - | |
| Arindam Bose - Director | Option exercise | Restricted Stock Unit | 10,776 | $0.00 | - | |
| Arindam Bose - Director | Derivative | Restricted Stock Unit | 10,776 | $0.00 | - | |
| Joseph P. Hazelton - Officer | Grant or award | Stock Option | 25,000 | $0.00 | - | |
| Michael P. Tarnok - Director | Option exercise | Common Stock | 6,250 | $0.97 | $6K | |
| Michael P. Tarnok - Director | Option exercise | Common Stock | 18,750 | $0.97 | $18K | |
| Michael P. Tarnok - Director | Option exercise | Stock Option | 6,250 | $0.00 | - | |
| Michael P. Tarnok - Director | Option exercise | Stock Option | 18,750 | $0.00 | - | |
Item 3.01
Item 1.01, 3.02, 8.01, 9.01
Item 2.02, 9.01
Item 8.01, 9.01
Recent DYAI Form 144 notices of proposed sale
1An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| - | - | - | - | View on EDGAR |
DYAI insider trading FAQ
What is the latest insider trade for DYAI?
DYADIC INTERNATIONAL INC (DYAI) had 1 insider filing in the last 90 days, with the most recent on 2026-07-24. The full record for DYAI runs to 16 Form 4 filings, the earliest from 2024-11-25. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying DYAI stock?
No insider purchases of DYAI were filed in the last 90 days. 3 purchases are on record for this company.
How many insiders are selling DYAI stock?
3 insider sales of DYAI were filed in the last 90 days, totaling $125K.
Where can I see DYAI SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects DYAI Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Francisco Trust under agreement dated February 28, 1996 view on EDGAR
- - Francisco Trust under agreement dated February 28, 1996 view on EDGAR
- - Ronen Tchelet view on EDGAR
- - Ping Wang Rawson view on EDGAR
- - Patrick K. Lucy view on EDGAR
- - Jack Kaye view on EDGAR
- - Seth Herbst view on EDGAR
- - Joseph P. Hazelton view on EDGAR
- - Mark A. Emalfarb view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Health Care
- Where DYAI's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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