Dyadic International Inc (DYAI) Insider Ownership

Historic Insider Ownership Trends

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).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
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