SEC Form 4
Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*

(Last) (First) (Middle)

JUPITER FL 33477-5094

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director X 10% Owner
X Officer (give title below) Other (specify below)
President and CEO
3. Date of Earliest Transaction (Month/Day/Year)
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 06/07/2021 S 44,000(1) D $3.95(2) 4,287,917 I Through Mark A. Emalfarb Trust U/A DTD 10/1/1987
Common Stock 06/08/2021 S 30,000(1) D $3.82(2) 4,257,917 I Through Mark A Emalfarb Trust U/A/DTD 10/1/1987
Common Stock 06/09/2021 S 23,000(1) D $3.72(2) 4,234,917 I Through Mark A. Emalfarb Trust U/A/ DTD 10/1/1987
Common Stock 06/09/2021 M 100,000 A $1.67 4,334,917 I Through Mark A. Emalfarb Trust U/A DTD 10/1/1987
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option $1.67 06/09/2021 M 100,000(3) 06/21/2016 06/21/2021 Common Stock 100,000 $0 0 D
Explanation of Responses:
1. These shares were sold to satisfy exercise price and tax withholding obligations to be funded for options expiring on June 21, 2021. As a result of the option exercises and sale transactions reported on this Form 4 together with the Form 4 filed on June 4, 2021, the reporting person's net share ownership increased by an aggregate of 167,930 shares, from 4,166,987 to 4,334,917 shares of Common Stock.
2. The price reported in Column 4 is a weighted average price. These sold in multiple transactions at prices ranging from $4.01 to $3.92, inclusive, on June 7, 2021, $3.96 to $3.80, inclusive, on June 8, 2021, and $3.85 to $3.68, inclusive, on June 9, 2021. The reporting person undertakes to provide to Dyadic International, Inc., any security holder of Dyadic International, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of footnote (2) to this Form 4.
3. Exercise of reporting person's stock options that would otherwise expire June 21, 2021.
/s/ Mark A Emalfarb 06/09/2021
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.