DYAI's three largest insider shareholders as of April 28, 2026 are Mark A Emalfarb (President And Ceo, 12.95Mn shares), Mark A Emalfarb (Ceo, 4.83Mn shares), Trust Under Agreement Dated February 28, 1996 Francisco (TenPercentOwner, 3.55Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Mark A Emalfarb | President And Ceo | 0 | 12,946,461 | 23 Dec, 2021 |
| Mark A Emalfarb | Ceo | 4,832,667 | 0 | 06 Jan, 2026 |
| Trust Under Agreement Dated February 28, 1996 Francisco | - | 3,548,528 | 0 | 16 Aug, 2021 |
| Michael P. Tarnok | - | 281,033 | 0 | 24 Jun, 2025 |
| Seth Herbst | - | 202,311 | 0 | 06 Jan, 2026 |
| Joseph P Hazelton | President Coo | 191,758 | 0 | 06 Jan, 2026 |
| Ping Wang Rawson | Chief Financial Officer | 170,151 | 0 | 06 Jan, 2026 |
| Jack Kaye | - | 81,201 | 0 | 06 Jan, 2026 |
| Patrick K. Lucy | - | 72,311 | 0 | 06 Jan, 2026 |
| Arindam Bose | - | 61,535 | 0 | 24 Jun, 2025 |
| Ronen Tchelet | Vp Of Research And Bus. Dvlpmt | 50,897 | 0 | 06 Jan, 2026 |
| Barry Buckland | - | 38,967 | 0 | 13 Jun, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 02 Jan, 2026 | Seth Herbst | Common Stock | A | 21,552 | - | 202,311 | D | M |
| 02 Jan, 2026 | Ronen Tchelet | Common Stock | A | 18,064 | $0.00 | 50,897 | D | A |
| 02 Jan, 2026 | Mark A Emalfarb | Common Stock | A | 102,609 | $0.00 | 4,832,667 | D | A |
| 02 Jan, 2026 | Ping Wang Rawson | Common Stock | A | 29,158 | $0.00 | 170,151 | D | A |
| 02 Jan, 2026 | Jack Kaye | Common Stock | A | 21,552 | - | 81,201 | D | M |
| 02 Jan, 2026 | Joseph P Hazelton | Common Stock | A | 36,418 | $0.00 | 191,758 | D | A |
| 02 Jan, 2026 | Patrick K. Lucy | Common Stock | A | 21,552 | - | 72,311 | D | M |
| 02 Jan, 2026 | Joseph P Hazelton | Stock Option | A | 67,250 | $0.00 | 67,250 | D | A |
| 02 Jan, 2026 | Seth Herbst | Restricted Stock Unit | D | 21,552 | $0.00 | 0 | D | M |
| 02 Jan, 2026 | Mark A Emalfarb | Stock Option | A | 126,000 | $0.00 | 126,000 | D | A |
| 02 Jan, 2026 | Patrick K. Lucy | Restricted Stock Unit | D | 21,552 | $0.00 | 0 | D | M |
| 02 Jan, 2026 | Ronen Tchelet | Stock Option | A | 47,250 | $0.00 | 47,250 | D | A |
| 02 Jan, 2026 | Jack Kaye | Restricted Stock Unit | D | 21,552 | $0.00 | 0 | D | M |
| 02 Jan, 2026 | Ping Wang Rawson | Stock Option | A | 47,250 | $0.00 | 47,250 | D | A |
| 02 Jan, 2026 | Jack Kaye | Stock Option | A | 67,500 | $0.00 | 67,500 | D | A |
| 02 Jan, 2026 | Seth Herbst | Stock Option | A | 50,000 | $0.00 | 50,000 | D | A |
| 02 Jan, 2026 | Patrick K. Lucy | Stock Option | A | 67,500 | $0.00 | 67,500 | D | A |
| 02 Jan, 2026 | Patrick K. Lucy | Restricted Stock Unit | A | 39,894 | $0.00 | 39,894 | D | A |
| 02 Jan, 2026 | Jack Kaye | Restricted Stock Unit | A | 39,894 | $0.00 | 39,894 | D | A |
| 02 Jan, 2026 | Seth Herbst | Restricted Stock Unit | A | 39,894 | $0.00 | 39,894 | D | A |