Patrick K. Lucy - 02 Jan 2026 Form 4 Insider Report for DYADIC INTERNATIONAL INC (DYAI)

Reporting relationship: Director
Issuer ticker: DYAI
Reported as of: 02 Jan 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 Jan 2026, 18:10:38 UTC
Prior SEC filing: 07 Jan 2025
Source filing: View source filing
Reporting owner signature: /s/ Ping Rawson, attorney-in-fact

Key filing fact

Patrick K. Lucy filed Form 4 for DYADIC INTERNATIONAL INC (DYAI) on 06 Jan 2026.

Key facts

This page summarizes Patrick K. Lucy's Form 4 filing for DYADIC INTERNATIONAL INC (DYAI).
4 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 06 Jan 2026, 18:10.

Change

Previous filing in this sequence was filed on 07 Jan 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001612843 Primary reporting owner

Lucy Patrick K.

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

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

DYAI transaction

Common Stock

Options Exercise

Transaction value
Shares: +21,552
Change %: +42%
Price
Shares after: 72,311
Date: 02 Jan 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

DYAI transaction Derivative

Restricted Stock Unit

Options Exercise

Transaction value: $0
Shares: -21,552
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 02 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 21,552
Exercise price
Footnotes: F1, F5

DYAI transaction Derivative

Stock Option

Award

Transaction value: $0
Shares: +67,500
Change %
Price: $0.000000
Shares after: 67,500
Date: 02 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 67,500
Exercise price: $0.9400
Footnotes: F2

DYAI transaction Derivative

Restricted Stock Unit

Award

Transaction value: $0
Shares: +39,894
Change %
Price: $0.000000
Shares after: 39,894
Date: 02 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 39,894
Exercise price
Footnotes: F1, F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Footnote F2

Annual grant of stock options.

Footnote F3

Annual grant of restricted stock units.

Footnote 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.

Footnote 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.