SETH HERBST - 02 Jan 2026 Form 4 Insider Report for DYADIC INTERNATIONAL INC (DYAI)

Role
Director
Signature
/s/ Ping Rawson, attorney-in-fact
Issuer symbol
DYAI
Transactions as of
02 Jan 2026
Net transactions value
$0
Form type
4
Filing time
06 Jan 2026, 18:07:37 UTC
Previous filing
08 Jan 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
HERBST SETH Director C/O DYADIC INTERNATIONAL, INC., 1044 NORTH U.S. HIGHWAY ONE, SUITE 201, JUPITER /s/ Ping Rawson, attorney-in-fact 06 Jan 2026 0001761275

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction DYAI Common Stock Options Exercise +21,552 +12% 202,311 02 Jan 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction DYAI Restricted Stock Unit Options Exercise $0 -21,552 -100% $0.000000 0 02 Jan 2026 Common Stock 21,552 Direct F1, F5
transaction DYAI Stock Option Award $0 +50,000 $0.000000 50,000 02 Jan 2026 Common Stock 50,000 $0.9400 Direct F2
transaction DYAI Restricted Stock Unit Award $0 +39,894 $0.000000 39,894 02 Jan 2026 Common Stock 39,894 Direct F1, F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
F2 Annual grant of stock options.
F3 Annual grant of restricted stock units.
F4 The restricted stock units will be settled 100% in Issuer's common stock when vested upon the first anniversary of the date of grant, subject to continued service as a member of the board of directors.
F5 The restricted stock units previously issued and vested upon the first anniversary of the date of grant, subject to continued service as a member of the board of directors, were settled 100% in Issuer's common stock.