Who
Mark A. Emalfarb
CEO
Company insider
Files Form 4 as: CEO, Dyadic International.
In numbers
- Trades disclosed
- 37
- Buys
- 0
- Sells
- 9
- Bought
- $0
- Sold
- $1.6M
- Companies
- 1
- Companies where not an officer
- 0
- First trade
- 1 May 2006
- Last trade
- 2 Jan 2026
- Last filed
- 6 Jan 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 2 Jan 2026filed 6 Jan 2026 | DYAI Dyadic InternationalBiotechnology | SEC FORM 4 Code A | —102,609 at $0.00 | filing |
| 2 Jan 2026filed 6 Jan 2026 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code A | —126,000 at $0.00 | filing |
| 2 Jan 2026filed 6 Jan 2026 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code A | —126,000 at $0.00 | filing |
| 2 Jan 2026filed 6 Jan 2026 | DYAI Dyadic InternationalBiotechnology | SEC FORM 4 Code A | —102,609 at $0.00 | filing |
| 23 Dec 2025filed 29 Dec 2025 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code D | — | filing |
| 23 Dec 2025filed 29 Dec 2025 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code A | — | filing |
| 15 Sep 2025filed 17 Sep 2025 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code P | — | filing |
| 2 Jan 2025filed 7 Jan 2025 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code A | —172,000 at $0.00 | filing |
| 2 Jan 2025filed 7 Jan 2025 | DYAI Dyadic InternationalBiotechnology | SEC FORM 4 Code A | —73,111 at $0.00 | filing |
| 13 Mar 2024filed 15 Apr 2024 | DYAI Dyadic InternationalBiotechnology | SEC FORM 4 Code A | —124,454 at $0.00 | filing |
| 2 Jan 2024filed 4 Jan 2024 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code A | —200,000 at $0.00 | filing |
| 3 Jan 2023filed 5 Jan 2023 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code A | —200,000 at $0.00 | filing |
| 3 Jan 2023filed 5 Jan 2023 | DYAI Dyadic InternationalBiotechnology | SEC FORM 4 Code A | $191K138,478 at $1.38 | filing |
| 3 Jan 2022filed 5 Jan 2022 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code A | —200,000 at $0.00 | filing |
| 23 Dec 2021filed 23 Dec 2021 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code M | —150,000 at $0.00 | filing |
| 23 Dec 2021filed 23 Dec 2021 | DYAI Dyadic InternationalBiotechnology | SEC FORM 4 Sold | $118K28,767 at $4.10 | filing |
| 23 Dec 2021filed 23 Dec 2021 | DYAI Dyadic InternationalBiotechnology | SEC FORM 4 Code M | $245K150,000 at $1.63 | filing |
| 22 Dec 2021filed 23 Dec 2021 | DYAI Dyadic InternationalBiotechnology | SEC FORM 4 Sold | $147K35,649 at $4.12 | filing |
| 21 Dec 2021filed 23 Dec 2021 | DYAI Dyadic InternationalBiotechnology | SEC FORM 4 Sold | $115K26,486 at $4.33 | filing |
| 9 Jun 2021filed 9 Jun 2021 | DYAI Dyadic Internationaloption or derivative · Biotechnology | SEC FORM 4 Code M | —100,000 at $0.00 | filing |
News
No headline names them, or the companies they trade most, lately.