Comparable stake leader
Mark A. Emalfarb
SEC ownership of DYADIC INTERNATIONAL INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001213809.
Disclosed value leader
Mark A. Emalfarb
Comparable rows
39/48
Latest evidence
31 Mar 2026
- Public ticker
- DYAI on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Mark A. Emalfarb
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
39 of 48
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Mark A. Emalfarb
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001213809
- Issuer location
- Jupiter, FL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of DYADIC INTERNATIONAL INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Mark A. Emalfarb
Disclosed value leader
Mark A. Emalfarb
Comparable rows
39/48
Latest evidence
31 Mar 2026
13D/G
3/4/5
13F
Lead comparable stake: 18%
9 rows are not safely comparable across share classes.
13D/G row: Mark A. Emalfarb
Showing 1-8 of 48 holder rows.
Quick read
Mark A. Emalfarb leads the comparable SEC ownership view at 18%.
39 of 48 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Mark A. Emalfarb's linked filing trail.
Comparable ownership
Top 5
Mark A. Emalfarb
18%
Francisco Trust under agreement d...
12%
Bandera Partners LLC
4.6%
APIS CAPITAL ADVISORS, LLC
3.5%
VANGUARD CAPITAL MANAGEMENT LLC
2.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 48 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Mark A. Emalfarb |
13D/G
3/4/5
CEO, Director, 10%+ Owner
|
18%
|
$6,274,913
6,675,439 shares
|
+$405,229 | 31 Dec 2025 |
| Francisco Trust under agreement dated February 28, 1996 |
3/4/5
13D/G
10%+ Owner
|
12%
from 13D/G
|
$4,896,969
3,548,528 shares
|
— | 27 Jul 2021 |
| Bandera Partners LLC |
13D/G
|
4.6%
|
$1,355,642
1,383,308 shares
|
$0 | 30 Jun 2025 |
| APIS CAPITAL ADVISORS, LLC |
13F
Company
|
3.5%
|
$1,042,197
1,270,972 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
2.5%
|
$761,151
928,233 shares
|
— | 31 Mar 2026 |
| CHAPIN DAVIS, INC. |
13F
Company
|
2.4%
|
$728,166
888,004 shares
|
— | 31 Mar 2026 |
| TRUIST FINANCIAL CORP |
13F
Company
|
0.89%
|
$267,484
326,200 shares
|
— | 31 Mar 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
0.86%
|
$257,123
313,508 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$24,700.
Buys
$24,700
Insiders: 1
Sells
$0
Insiders: 0
Net
+$24,700
Shares: +26,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 26,000
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 26,000 | 0 | $24,700 | $0 | +$24,700 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-11 of 11 reporting-owner rows connected to DYADIC INTERNATIONAL INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
11
Largest Forms 3/4/5 holder
Francisco Trust under agreement dated February 28, 1996
Net 12M change
+$24,700
Latest report
02 Jan 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Francisco Trust under agreement dated February 28, 1996 | 10%+ Owner | $4,896,969 | Mixed | 27 Jul 2021 | ||
| Mark A. Emalfarb | CEO, Director, 10%+ Owner | $4,784,340 | Mixed | 02 Jan 2026 | ||
| Michael P. Tarnok | Director | $358,933 | Mixed | 20 Jun 2025 | ||
| Seth Herbst | Director | $221,192 | Mixed | 02 Jan 2026 | ||
| Joseph P. Hazelton | President & COO | $189,840 | +$24,700 | +15% | Mixed | 02 Jan 2026 |
| Ping Wang Rawson | Chief Financial Officer | $168,449 | Mixed | 02 Jan 2026 | ||
| Barry Buckland | Director | $127,033 | Mixed | 11 Jun 2024 | ||
| Jack Kaye | Director | $101,293 | Mixed | 02 Jan 2026 | ||
| Arindam Bose | Director | $97,208 | Mixed | 20 Jun 2025 | ||
| Patrick K. Lucy | Director | $92,492 | Mixed | 02 Jan 2026 | ||
| Ronen Tchelet | VP of Research and Bus. Dvlpmt | $50,388 | Mixed | 02 Jan 2026 |
Recent insider transactions for DYADIC INTERNATIONAL INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Ronen Tchelet | DYAI | Common Stock | Award | 55% | 18,064 | 50,897 | 02 Jan 2026 | Direct | ||
| Ronen Tchelet | DYAI | Stock Option | Award | 47,250 | 47,250 | 02 Jan 2026 | Direct | |||
| Ping Wang Rawson | DYAI | Common Stock | Award | 20.7% | 29,158 | 170,151 | 02 Jan 2026 | Direct | ||
| Ping Wang Rawson | DYAI | Stock Option | Award | 47,250 | 47,250 | 02 Jan 2026 | Direct | |||
| Patrick K. Lucy | DYAI | Common Stock | Options Exercise | 42.5% | 21,552 | 72,311 | 02 Jan 2026 | Direct | ||
| Patrick K. Lucy | DYAI | Restricted Stock Unit | Award | 39,894 | 39,894 | 02 Jan 2026 | Direct | |||
| Patrick K. Lucy | DYAI | Stock Option | Award | 67,500 | 67,500 | 02 Jan 2026 | Direct | |||
| Patrick K. Lucy | DYAI | Restricted Stock Unit | Options Exercise | -100% | -21,552 | 0 | 02 Jan 2026 | Direct | ||
| Jack Kaye | DYAI | Common Stock | Options Exercise | 36.1% | 21,552 | 81,201 | 02 Jan 2026 | Direct | ||
| Jack Kaye | DYAI | Restricted Stock Unit | Award | 39,894 | 39,894 | 02 Jan 2026 | Direct | |||
| Jack Kaye | DYAI | Stock Option | Award | 67,500 | 67,500 | 02 Jan 2026 | Direct | |||
| Jack Kaye | DYAI | Restricted Stock Unit | Options Exercise | -100% | -21,552 | 0 | 02 Jan 2026 | Direct | ||
| Seth Herbst | DYAI | Common Stock | Options Exercise | 11.9% | 21,552 | 202,311 | 02 Jan 2026 | Direct | ||
| Seth Herbst | DYAI | Restricted Stock Unit | Award | 39,894 | 39,894 | 02 Jan 2026 | Direct | |||
| Seth Herbst | DYAI | Stock Option | Award | 50,000 | 50,000 | 02 Jan 2026 | Direct | |||
| Seth Herbst | DYAI | Restricted Stock Unit | Options Exercise | -100% | -21,552 | 0 | 02 Jan 2026 | Direct | ||
| Joseph P. Hazelton | DYAI | Common Stock | Award | 23.4% | 36,418 | 191,758 | 02 Jan 2026 | Direct | ||
| Joseph P. Hazelton | DYAI | Stock Option | Award | 67,250 | 67,250 | 02 Jan 2026 | Direct | |||
| Mark A. Emalfarb | DYAI | Common Stock | Award | 2.17% | 102,609 | 4,832,667 | 02 Jan 2026 | Direct | ||
| Mark A. Emalfarb | DYAI | Stock Option | Award | 126,000 | 126,000 | 02 Jan 2026 | Direct | |||
| Mark A. Emalfarb | DYAI | Senior Secured Convertible Promissory Note due Dec 31, 2027 | Award | 0 | $1,000,000 | 23 Dec 2025 | Through Mark A Emalfarb Trust U/A/ DTD 10/1/1987 | |||
| Mark A. Emalfarb | DYAI | Senior Secured Convertible Promissory Note due March 8, 2027 | Disposed to Issuer | 0 | 0 | 23 Dec 2025 | Through Mark A Emalfarb Trust U/A/ DTD 10/1/1987 | |||
| Mark A. Emalfarb | DYAI | Senior Secured Convertible Promissory Note due March 8, 2027 | Purchase | 0 | $1,000,000 | 15 Sep 2025 | Through Mark A Emalfarb Trust U/A/ DTD 10/1/1987 | |||
| Joseph P. Hazelton | DYAI | Common Stock | Purchase | 20.1% | $24,700 | $0.9500 | 26,000 | 155,340 | 01 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.