Mark A. Emalfarb - 02 Jan 2026 Form 4 Insider Report for DYADIC INTERNATIONAL INC (DYAI)

Role
CEO, Director, 10%+ Owner
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, 18:04:36 UTC
Previous filing
29 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
EMALFARB MARK A CEO, Director, 10%+ Owner C/O DYADIC INTERNATIONAL, INC., 1044 NORTH U.S. HIGHWAY ONE, SUITE 201, JUPITER /s/ Ping Rawson, attorney-in-fact 06 Jan 2026 0001328287

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction DYAI Common Stock Award $0 +102,609 +2.2% $0.000000 4,832,667 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 Stock Option Award $0 +126,000 $0.000000 126,000 02 Jan 2026 Common Stock 126,000 $0.9400 Direct F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents common stock issued upon the vesting of RSUs. The RSUs were granted pursuant to the Issuer's key employee annual bonus, in lieu of a cash bonus earned for the year ended 2025. The RSUs vested in full upon grant.
F2 Annual grant of stock options.
F3 This option vests in four equal installments beginning on the first anniversary of the date of grant, subject to continued service to the Issuer.