DYAINasdaqBiological Products, (No Diagnostic Substances)Fiscal year ends December 31
DYADIC INTERNATIONAL INC
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 12, 2026
$0.38−0.03 (-7.35%)
Close on Oct 19, 2026
- Market cap
- $13.88M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
12.7%
5M of 36M shares
Institutional holders
39
6 new, 3 sold out
Net institutional buying
-1M
In Q2 2026
Insider trades, 12 months
0 buys · 3 sales
Net sold $124.91K
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Mark A. Emalfarb | 6,675,439 | 17.50% | 13G (passive) amendment | Dec 31, 2025 |
| Francisco Trust under agreement dated February 28, 1996 | 4,232,653 | 10.32% | 13G (passive) amendment | Aug 14, 2026 |
| Empery Asset Management, LP | 3,346,275 | 8.35% | 13G (passive) | Sep 30, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of DYAI | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 928,233 | 2.55% | $831.70K | – | 0.00% |
| Chapin Davis, Inc. | 888,004 | 2.44% | $795.65K | – | 0.14% |
| Apis Capital Advisors, LLC | 804,882 | 2.21% | $721.17K | −466,090 | 0.07% |
| Truist Financial Corp | 326,200 | 0.90% | $292.28K | – | 0.00% |
| Geode Capital Management, LLC | 250,905 | 0.69% | $224.87K | −62,603 | 0.00% |
| BlackRock, Inc. | 197,749 | 0.54% | $177.18K | −77,676 | 0.00% |
| Vanguard Fiduciary Trust Co | 139,478 | 0.38% | $124.97K | – | 0.00% |
| Marathon Capital Management | 110,000 | 0.30% | $98.56K | – | 0.02% |
| Sage Mountain Advisors LLC | 106,564 | 0.29% | $95.48K | – | 0.01% |
| HighTower Advisors, LLC | 79,469 | 0.22% | $71.20K | – | 0.00% |
| Renaissance Technologies LLC | 78,786 | 0.22% | $70.59K | −2,879 | 0.00% |
| Citadel Advisors LLC | 74,336 | 0.20% | $66.61K | New | 0.00% |
| Northern Trust Corp | 69,745 | 0.19% | $62.49K | +36,894 | 0.00% |
| Landscape Capital Management, L.L.C. | 55,263 | 0.15% | $49.52K | −41,753 | 0.00% |
| AE Wealth Management LLC | 53,756 | 0.15% | $48.17K | – | 0.00% |
| Perkins Capital Management Inc | 48,050 | 0.13% | $43.05K | – | 0.03% |
| XTX Topco Ltd | 46,665 | 0.13% | $41.81K | New | 0.00% |
| State Street Corp | 42,550 | 0.12% | $38.13K | – | 0.00% |
| Pekin Hardy Strauss, Inc. | 41,745 | 0.11% | $37.40K | – | 0.00% |
| Jane Street Group, LLC | 41,217 | 0.11% | $36.93K | New | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 39 | 5M | 12.7% | 6 / 5 | 7 / 3 | 0M | 1M |
| Q1 2026 | 36 | 5M | 14.1% | 5 / 6 | 7 / 6 | 1M | 1M |
| Q4 2025 | 38 | 6M | 15.3% | 4 / 6 | 9 / 4 | 0M | 0M |
| Q3 2025 | 38 | 6M | 16.1% | 8 / 9 | 6 / 6 | 3M | 1M |
| Q2 2025 | 37 | 5M | 13.6% | 6 / 8 | 6 / 1 | 0M | 0M |
| Q1 2025 | 34 | 5M | 13.9% | 1 / 9 | 5 / 8 | 0M | 0M |
| Q4 2024 | 41 | 5M | 14.0% | 9 / 3 | 9 / 3 | 0M | 0M |
| Q3 2024 | 35 | 5M | 13.1% | 3 / 9 | 5 / 6 | 0M | 0M |
| Q2 2024 | 39 | 5M | 12.9% | 8 / 9 | 6 / 2 | 0M | 0M |
| Q1 2024 | 33 | 5M | 12.5% | 5 / 9 | 7 / 5 | 0M | 0M |
| Q4 2023 | 33 | 5M | 12.4% | 3 / 8 | 7 / 2 | 0M | 0M |
| Q3 2023 | 32 | 4M | 12.3% | 3 / 6 | 7 / 3 | 0M | 0M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of DYAI | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 583,627 | 1.60% | $522.93K | 0.00% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 344,606 | 0.95% | $308.77K | 0.00% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 151,125 | 0.41% | $122.11K | 0.00% | May 31, 2026 |
| Fidelity Nasdaq Composite Index Fund | 48,866 | 0.13% | $39.48K | 0.00% | May 31, 2026 |
| Fidelity Total Market Index Fund | 37,314 | 0.10% | $30.15K | 0.00% | May 31, 2026 |
| Fidelity Series Total Market Index Fund | 29,080 | 0.08% | $23.50K | 0.00% | May 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Mark A. Emalfarb | CEO, Director, 10% owner | 9,076,682 | 24.91% | Jan 6, 2026 |
| Joseph P. Hazelton | President & COO | 191,758 | 0.53% | Jan 6, 2026 |
| Ping Wang Rawson | Chief Financial Officer | 185,957 | 0.51% | Jan 6, 2026 |
| Ronen Tchelet | VP of Research and Bus. Dvlpmt | 50,897 | 0.14% | Jan 6, 2026 |
| Seth Herbst | Director | 202,311 | 0.56% | Jan 6, 2026 |
| Patrick K. Lucy | Director | 72,311 | 0.20% | Jan 6, 2026 |
| Jack Kaye | Director | 81,201 | 0.22% | Jan 6, 2026 |
| Michael P. Tarnok | Director | 281,033 | 0.77% | Jun 24, 2025 |
| Arindam Bose | Director | 61,535 | 0.17% | Jun 24, 2025 |
| Francisco Trust under agreement dated February 28, 1996 | 10% owner | 3,280,272 | 9.00% | Jul 24, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Francisco Trust under agreement dated February 28, 1996 10% owner | Jul 24, 2026 | Sale | −2,616 | $1.21 | $3.17K | 3,280,272 |
| Francisco Trust under agreement dated February 28, 1996 10% owner | Jul 23, 2026 | Sale | −54,760 | $1.30 | $71.19K | 3,282,888 |
| Francisco Trust under agreement dated February 28, 1996 10% owner | Jul 22, 2026 | Sale | −38,016 | $1.33 | $50.56K | 3,337,648 |
| Ping Wang Rawson Chief Financial Officer | Jan 2, 2026 | Award | +29,158 | – | – | 170,151 |
| Joseph P. Hazelton President & COO | Jan 2, 2026 | Award | +36,418 | – | – | 191,758 |
| Ronen Tchelet VP of Research and Bus. Dvlpmt | Jan 2, 2026 | Award | +18,064 | – | – | 50,897 |
| Seth Herbst Director | Jan 2, 2026 | Option exercise | +21,552 | – | – | 202,311 |
| Patrick K. Lucy Director | Jan 2, 2026 | Option exercise | +21,552 | – | – | 72,311 |
| Jack Kaye Director | Jan 2, 2026 | Option exercise | +21,552 | – | – | 81,201 |
| Mark A. Emalfarb CEO, Director, 10% owner | Jan 2, 2026 | Award | +102,609 | – | – | 4,832,667 |
| Joseph P. Hazelton President and COO | Aug 1, 2025 | Buy | +26,000 | $0.95 | $24.70K | 155,340 |
| Michael P. Tarnok Director | Jun 20, 2025 | Option exercise | +10,776 | – | – | 281,033 |
| Arindam Bose Director | Jun 20, 2025 | Option exercise | +10,776 | – | – | 61,535 |
| Jack Kaye Director | Mar 5, 2025 | Option exercise | +22,500 | $1.33 | $29.93K | 87,166 |
| Jack Kaye Director | Mar 5, 2025 | Option exercise | +7,500 | $1.33 | $9.98K | 64,666 |
| Jack Kaye Director | Mar 5, 2025 | Tax withholding | −27,517 | $1.45 | $39.90K | 59,649 |
| Francisco Trust under agreement dated February 28, 1996 10% owner | Jan 7, 2025 | Sale | −15,000 | $2.01 | $30.15K | 3,375,664 |
| Francisco Trust under agreement dated February 28, 1996 10% owner | Jan 6, 2025 | Sale | −20,000 | $1.92 | $38.40K | 3,390,664 |
| Seth Herbst Director | Jan 6, 2025 | Option exercise | +18,750 | $0.97 | $18.19K | 174,509 |
| Seth Herbst Director | Jan 6, 2025 | Option exercise | +6,250 | $0.97 | $6.06K | 180,759 |
| Patrick K. Lucy Director | Jan 2, 2025 | Option exercise | +23,585 | – | – | 50,759 |
| Jack Kaye Director | Jan 2, 2025 | Option exercise | +23,585 | – | – | 57,166 |
| Seth Herbst Director | Jan 2, 2025 | Option exercise | +23,585 | – | – | 155,759 |
| Mark A. Emalfarb President and CEO, Director, 10% owner | Jan 2, 2025 | Award | +73,111 | – | – | 4,730,058 |
| Joseph P. Hazelton Chief Operating Officer | Jan 2, 2025 | Award | +30,172 | – | – | 129,340 |
| Arindam Bose Director | Jan 2, 2025 | Option exercise | +23,585 | – | – | 50,759 |
| Ronen Tchelet VP of Research and Bus. Dvlpmt | Jan 2, 2025 | Award | +8,980 | – | – | 32,833 |
| Michael P. Tarnok Director | Jan 2, 2025 | Option exercise | +23,585 | – | – | 270,257 |
| Ping Wang Rawson Chief Financial Officer | Jan 2, 2025 | Award | +20,776 | – | – | 140,993 |
| Francisco Trust under agreement dated February 28, 1996 10% owner | Dec 30, 2024 | Sale | −40,000 | $1.98 | $79.20K | 3,410,664 |
| Francisco Trust under agreement dated February 28, 1996 10% owner | Dec 24, 2024 | Sale | −5,100 | $1.80 | $9.18K | 3,450,664 |
| Francisco Trust under agreement dated February 28, 1996 10% owner | Dec 23, 2024 | Sale | −41,143 | $1.84 | $75.70K | 3,455,764 |
| Francisco Trust under agreement dated February 28, 1996 10% owner | Dec 20, 2024 | Sale | −25,281 | $1.87 | $47.28K | 3,496,907 |
| Michael P. Tarnok Director | Nov 22, 2024 | Option exercise | +6,250 | $0.97 | $6.06K | 227,922 |
| Michael P. Tarnok Director | Nov 22, 2024 | Option exercise | +18,750 | $0.97 | $18.19K | 246,672 |
| Barry Buckland Director | Jun 11, 2024 | Option exercise | +11,793 | $1.59 | $18.75K | 38,967 |
| Francisco Trust under agreement dated February 28, 1996 10% owner | Jun 6, 2024 | Sale | −26,340 | $2.43 | $64.01K | 3,522,188 |
| Michael P. Tarnok Director | May 21, 2024 | Option exercise | +7,500 | $1.36 | $10.20K | 223,603 |
| Michael P. Tarnok Director | May 21, 2024 | Option exercise | +16,875 | $1.36 | $22.95K | 246,103 |
| Michael P. Tarnok Director | May 21, 2024 | Tax withholding | −24,431 | $1.67 | $40.80K | 221,672 |
| Michael P. Tarnok Director | May 21, 2024 | Option exercise | +5,625 | $1.36 | $7.65K | 229,228 |
| Ping Wang Rawson Chief Financial Officer | Mar 13, 2024 | Award | +35,366 | – | – | 120,217 |
| Mark A. Emalfarb President and CEO, Director, 10% owner | Mar 13, 2024 | Award | +124,454 | – | – | 4,656,947 |
| Ronen Tchelet VP of Research and Bus. Dvlpmt | Mar 13, 2024 | Award | +11,169 | – | – | 23,853 |
| Joseph P. Hazelton Chief Business Officer | Mar 13, 2024 | Award | +41,720 | – | – | 99,168 |
| Patrick K. Lucy Director | Jan 3, 2024 | Option exercise | +27,174 | – | – | 27,174 |
| Jack Kaye Director | Jan 3, 2024 | Option exercise | +27,174 | – | – | 33,581 |
| Michael P. Tarnok Director | Jan 3, 2024 | Option exercise | +27,174 | – | – | 216,103 |
| Seth Herbst Director | Jan 3, 2024 | Option exercise | +27,174 | – | – | 132,174 |
| Arindam Bose Director | Jan 3, 2024 | Option exercise | +27,174 | – | – | 27,174 |
| Barry Buckland Director | Jan 3, 2024 | Option exercise | +27,174 | – | – | 27,174 |
| Ping Wang Rawson Chief Financial Officer | Jan 3, 2023 | Award | +39,351 | $1.38 | $54.30K | 84,851 |
| Joseph P. Hazelton Chief Business Officer | Jan 3, 2023 | Award | +57,448 | $1.38 | $79.28K | 57,448 |
| Mark A. Emalfarb President and CEO, Director, 10% owner | Jan 3, 2023 | Award | +138,478 | $1.38 | $191.10K | 4,532,493 |
| Ronen Tchelet VP of Research and Bus. Dvlpmt | Jan 3, 2023 | Award | +12,684 | $1.38 | $17.50K | 12,684 |
| Jack Kaye Director | Nov 21, 2022 | Gift | −33,150 | – | – | 39,557 |
| Jack Kaye Director | Nov 21, 2022 | Gift | −33,150 | – | – | 6,407 |
| Ronen Tchelet VP of Research and Bus. Dvlpmt | Jul 8, 2022 | Option exercise | +1,089 | $1.57 | $1.71K | 1,089 |
| Ronen Tchelet VP of Research and Bus. Dvlpmt | Jul 8, 2022 | Sale(10b5-1 plan) | −1,089 | $3.41 | $3.71K | 0 |
| Ronen Tchelet VP of Research and Bus. Dvlpmt | Jul 7, 2022 | Sale(10b5-1 plan) | −7,854 | $3.50 | $27.49K | 0 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Francisco Trust under agreement dated February 28, 1996 Greater than 10% holder | Jul 21, 2026 | 364,387 | $539.30K | Jul 21, 2026 | Various |
| Francisco Trust under agreement dated February 28, 1996 Greater than 10% holder | Jul 18, 2025 | 300,906 | $294.89K | Jul 18, 2025 | Various |
| Francisco Trust under agreement dated February 28, 1996 Greater than 10% holder | Mar 31, 2025 | 215,793 | $304.27K | Mar 31, 2025 | Various |
| Francisco Trust under agreement dated February 28, 1996 Greater than 10% holder | Dec 20, 2024 | 295,893 | $563.68K | Dec 20, 2024 | Various |
| Francisco Trust under agreement dated February 28, 1996 10% stockholder | Jun 6, 2024 | 292,400 | $657.90K | Jun 6, 2024 | Various |