Document:

Form of Short-Form Trust Agreement

 Exhibit 4.1 
 TRUST AGREEMENT 
 OF 
 TRAKRSSM TRUST I 
 THIS TRUST AGREEMENT, dated as of May 30, 2007, is being made between Merrill Lynch Alternative
Investments LLC, a Delaware limited liability company, as sponsor (the “Sponsor”), and Wilmington Trust Company, a Delaware banking corporation, as Delaware trustee (the “Delaware Trustee”), for the purpose of forming a statutory
trust pursuant to the Statutory Trust Act referred to below. The Sponsor and the Delaware Trustee hereby agree as follows: 
 1. The trust created hereby (the “Trust”) shall be known as “TRAKRSSM Trust I” in which name the Sponsor may conduct the business of the Trust, make and execute contracts, and sue and be sued. 
 2. The Sponsor hereby assigns, transfers, conveys and sets over to the Delaware Trustee the sum of $10. The Delaware Trustee hereby acknowledges receipt
of such amount in trust from the Sponsor, which amount shall constitute the initial trust estate. The Delaware Trustee hereby declares that it will hold the trust estate for the Sponsor. It is the intention of the parties hereto that the Trust
created hereby constitute a statutory trust under Chapter 38 of Title 12 of the Delaware Code, 12 Del. C. §§ 3801 et seq. (the “Statutory Trust Act”), and that this document constitute the governing
instrument of the Trust. The Delaware Trustee is hereby authorized and directed to execute and file a certificate of trust in the Office of the Secretary of State of the State of Delaware in accordance with the provisions of the Statutory Trust Act.

 3. The Trust is hereby established by the Sponsor and the Delaware Trustee for the purposes of (i) issuing and selling Receipts to
the Initial Purchaser in accordance with the Distribution Agreement and acquiring long positions in TRAKRS as a non-institutional customer and posting any cash delivered to the Trust by the Initial Purchaser with the FCM; (ii) issuing and
selling Receipts to the public, including effecting the IPO and listing of the Receipts on the Exchange; (iii) supporting the continuous offering of the Receipts, including maintaining a prospectus for the Receipts, entering into Authorized
Participant Agreements, issuing Baskets upon receipt of Purchase Orders from Authorized Participants, and redeeming Baskets upon receipt of Redemption Orders from Authorized Participants; (iv) establishing, closing out and holding long
positions in TRAKRS with the FCM as a non-institutional customer to meet the investment objective of the Trust; (v) maintaining the Trust’s status as a grantor trust for U.S. federal income tax purposes; (vi) bringing or defending,
paying, collecting, compromising, arbitrating, settling or otherwise adjusting claims or demands of or against the Trust; (vii) taking all action that may be necessary or appropriate for the preservation and the continuation of the Trust’s
valid existence, rights, franchises and privileges as a statutory trust under the laws of the State of Delaware and of each other jurisdiction in which such existence is necessary to protect 

 
the limited liability of the Registered Owners or to enable the Trust to effect the purposes for which the Trust was created; and (viii) taking any
action, not inconsistent with applicable law, that the Sponsor determines in its sole discretion may be necessary or desirable in carrying out the purposes and functions of the Trust as set forth in, or contemplated by, this Trust Agreement. Other
than issuing Receipts, the Trust shall not issue or sell any certificates or other obligations or otherwise incur, assume or guarantee any indebtedness for money borrowed. Each Registered Owner shall be a “beneficial owner” within the
meaning of the Statutory Trust Act. Consistent with treatment of the Trust as a grantor trust for U.S. federal income tax purposes, the Sponsor shall have no power under this Trust Agreement to vary the investment of the Beneficial Owners of the
Trust. 
 4. Concurrent with the first issuance of any Receipts by the Trust, the Sponsor and the Delaware Trustee, together with a person to
be designated as the Administrative Trustee, intend to enter into an amended and restated trust agreement (the “Amended and Restated Trust Agreement”), satisfactory to each such party and substantially in the form to be included as an
exhibit to the 1933 Act Registration Statement referred to below, or to a pre-effective amendment thereto, to provide for the contemplated operation of the Trust created hereby and the issuance of Receipts. The Delaware Trustee shall be a trustee of
the Trust for the sole and limited purpose of fulfilling the requirements of Section 3807(a) of the Statutory Trust Act and shall not have any other duty or obligation hereunder or with respect to the trust estate. 
 5. The Sponsor, as the sponsor of the Trust, is hereby authorized (i) to prepare and file with the Securities and Exchange Commission (the
“Commission”) and execute, in each case on behalf of the Trust, (a) a registration statement (the “1933 Act Registration Statement”) on Form S-1 under the Securities Act of 1933, as amended (the “Securities Act”),
including any amendments thereto, relating to the registration of the Receipts under the Securities Act, and (b) a registration statement on Form 8-A, including any amendments thereto, relating to the registration of the Receipts under
Section 12(b) of the Securities Exchange Act of 1934, as amended; (ii) to prepare and file with the NFA and execute, in each case on behalf of the Trust, a registration statement (which may be the 1933 Act Registration Statement) and any
and all amendments thereto; (iii) to prepare and file with the Exchange and execute a listing application and all other applications, statements, certificates, agreements and other instruments as shall be necessary or desirable to cause the
Receipts to be listed on the Exchange; (iv) to prepare and file and execute, in each case on behalf of the Trust, such applications, reports, surety bonds, irrevocable consents, appointments of attorney for service of process and other papers
and documents as shall be necessary or desirable to register the Receipts under the securities or “blue sky” laws of such jurisdictions as the Sponsor, on behalf of the Trust, may deem necessary or desirable; (v) to execute and
deliver letters or documents to, or instruments for filing with, a depository relating to the Receipts and also any filing required to be made with the NASD as determined by the Sponsor and any other filing or application necessary or desirable as
determined by the Sponsor in connection with the registration and/or offering of the Receipts; (vi) to negotiate the terms of, and execute on behalf of the Trust, the Distribution Agreement, Authorized Participant Agreements and any
underwriting agreement or purchase agreement relating to the Receipts as determined by the Sponsor; and (vii) to do all other acts which, in the Sponsor’s judgment, are reasonably necessary or desirable for the registration and/or offering
of the Receipts. It is hereby acknowledged and agreed that in connection with any execution, filing or document referred to in clauses (i)-(vii), (A) the Sponsor, acting 

  

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individually, is authorized on behalf of the Trust to prepare, file and execute such document on behalf of the Trust and (B) the Delaware Trustee shall
not be required to join in any such filing or execute on behalf of the Trust any such document unless required by the rules and regulations of the Commission or the Exchange or state securities or blue sky laws, and in such case only to the extent
so required. 
 6. This Trust Agreement may be executed in one or more counterparts. 
 7. The number of trustees of the Trust initially shall be one (1) and thereafter the number of trustees shall be such number as shall be fixed from
time to time by a written instrument signed by the Sponsor which may increase or decrease the number of trustees; provided, however, that the number of trustees shall in no event be fewer than one (1); and provided, further, however, that to the
extent required by the Statutory Trust Act, one trustee shall either be a natural person who is a resident of the State of Delaware or, if not a natural person, an entity that has its principal place of business in the State of Delaware and meets
any other requirements imposed by applicable law. Subject to the foregoing, the Sponsor is entitled to appoint or remove without cause any trustee at any time. Any trustee may resign upon thirty days prior notice to the Sponsor; provided, however,
that the Delaware Trustee may resign immediately upon notice to the Sponsor if the Delaware Trustee is required to join in any filing or execute on behalf of the Trust any document pursuant to the provisions of paragraph 5 hereof and, upon giving
such notice, the Delaware Trustee shall not be required to join in any such filing or execute on behalf of the Trust any such document; provided, further, however, that no resignation of the Delaware Trustee pursuant to the immediately preceding
proviso shall be effective until a successor Delaware Trustee has been appointed and has accepted such appointment by instrument executed by such successor Delaware Trustee and delivered to the Trust, the Sponsor and the resigning Delaware Trustee.

 8. To the fullest extent permitted by applicable law, the Sponsor agrees to indemnify (i) the Delaware Trustee, (ii) any
affiliate of the Delaware Trustee, and (iii) any officers, directors, receipt holders, members, partners, employees, representatives, nominees, custodians or agents of the Delaware Trustee (each of the persons or entities in (i) through
(iii) being referred to as an “Indemnified Person”) for, and to hold each Indemnified Person harmless against, any loss, liability or expense incurred without gross negligence or bad faith on its part, arising out of or in connection
with the acceptance or administration of the trust hereunder, including the costs and expenses (including reasonable legal fees and expenses) of defending itself against, or investigating, any claim or liability in connection with the exercise or
performance of any of its powers or duties hereunder. The obligation to indemnify as set forth in this paragraph 8 shall survive the resignation or removal of the Delaware Trustee and the termination of this Trust Agreement. 
 9. The Trust may terminate without issuing any Receipts at the election of the Sponsor. 
  

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 10. In addition to terms otherwise defined herein, the following terms are used as defined below:

 “Administrative Trustee” means the Person designated as administrative trustee and party to the Amended and Restated Trust
Agreement. 
 “Authorized Participant” means a Person that, at the time of submitting to the Administrative Trustee, or any trust
administrator appointed by the Administrative Trustee, a Purchase Order or a Redemption Order (a) is a registered broker-dealer and, if required in connection with its activities, a registered futures commission merchant, (b) is a DTC
Participant, (c) has in effect a valid Authorized Participant Agreement and (d) is in a position to transfer TRAKRS and/or cash to, or take delivery of these assets from, the Administrative Trustee and/or the FCM through one or more
accounts. 
 “Authorized Participant Agreement” means an agreement among the Trust, the Sponsor and an Authorized Participant that
provides the procedures for the creation and redemption of Baskets and for the delivery of TRAKRS and/or cash required for such creations or redemptions. 
 “Basket” means a block of 50,000 Receipts, as such number may be increased or decreased from time to time in accordance with the terms of the Amended and Restated Trust Agreement. 
 “Beneficial Owner” means any Person owning a beneficial interest in any Receipts. 
 “CFTC” means the Commodity Futures Trading Commission of the United States, or any successor governmental agency in the United States.

 “CME” means the Chicago Mercantile Exchange Inc., or its successor. 
 “Distribution Agreement” means the Distribution Agreement to be entered into on or about the date hereof among the Sponsor, the Trust and the
Initial Purchaser. 
 “DTC Participant” means a Person that has an account with The Depository Trust Company, or its successor.

 “Exchange” means the New York Stock Exchange or such other exchange as the Sponsor shall determine. 
 “FCM” means the Trust’s futures commission merchant. 
 “Initial Purchaser” means the initial purchaser under the Distribution Agreement. 
 “IPO” means the initial public offering of the Receipts. 
 “NASD” means the National Association of Securities
Dealers. 
  

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 “NFA” means the National Futures Association. 
 “Person” means any natural person or any limited liability company, corporation, partnership, joint venture, association, joint stock company,
trust, unincorporated organization or government or any agency or political subdivision thereof. 
 “Purchase Order” means an order
placed with the Administrative Trustee by an Authorized Participant for the acquisition of one or more Baskets. 
 “Receipts” means
the securities, issued by the Trust, that represent fractional undivided beneficial interests in the net assets of the Trust. 
 “Redemption Order” means an order placed with the Administrative Trustee by an Authorized Participant for the redemption of one or more Baskets. 
 “Registered Owner” means a Person in whose name Receipts are registered on the books of the Administrative Trustee maintained for that purpose. 
 “TRAKRS” means PIMCO®
CommodityRealReturnSM DJ-AIGCISM TRAKRSSM futures contracts traded on the CME. 
 11. This Trust Agreement shall be governed, and construed in accordance with, by the laws of the State of Delaware, without regard to conflict of laws principles. 
 [Signature Page Follows] 
  

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 IN WITNESS WHEREOF, the parties hereto have caused this Trust Agreement to be duly executed as of the day
and year first above written. 
  

			
	 MERRILL LYNCH ALTERNATIVE
 INVESTMENTS LLC,
as Sponsor

		
	By:	 	 /s/ Tom Lee

	Name:	 	Tom Lee
	Title:	 	Vice President
	
	 WILMINGTON TRUST COMPANY,
 as Delaware
Trustee

		
	 By:
	 	 /s/ Joseph B. Feil

	Name:	 	Joseph B. Feil
	Title:	 	Assistant Vice President

  

 6Reporting Period

    Exhibit
      10.1

    
 

    FOURTH
      AMENDMENT

    TO

    REVOLVING
      NOTE

    

    THIS
      FOURTH AMENDMENT (this “Fourth
      Amendment”)
      is
      made to that certain Revolving Note dated as of May 29, 2003 (the “Note”)
      in
      favor of MARK A. EMALFARB TRUST U/A/D dated October 1, 1987 (the “Lender”)
      by a
      wholly-owned subsidiary of DYADIC INTERNATIONAL, INC., a Delaware corporation
      (the “Borrower”),
      Dyadic International (USA), Inc., a Florida corporation (formerly known as
      Dyadic International, Inc.) (the “Borrower’s
      Predecessor”)
      and
      assumed by the Borrower pursuant to an Assumption Agreement dated October 29,
      2004 by and between the Borrower and the Lender.

    

    RECITALS:

    

    A. The
      Note
      is secured pursuant to the terms of a Security Agreement dated as of May 29,
      2003. 

    

    B. Capitalized
      terms not expressly defined herein shall have the meaning assigned those terms
      in the Note, as amended by First Amendment dated February 13, 2004 and Second
      Amendment dated August 19, 2004.

    

    C. Lender
      owns and holds the Note.

    

    D. Borrower
      has requested that Lender extend the scheduled Maturity Date under the Note
      until January 1, 2009.

    

    AMENDMENT
      TO NOTE:

    

    NOW,
      THEREFORE, in consideration of the foregoing Recitals and for other good and
      valuable consideration, the receipt and sufficiency of which are hereby
      expressly acknowledged by Lender, Borrower and Lender hereby agree as
      follows:

    

    1. Incorporation
      of Recitals.
      The
      foregoing Recitals are incorporated herein and by this reference made a part
      hereof, and this Fourth Amendment shall be construed in accordance
      therewith.

    

    2. Amendment
      of Maturity Date.
      The
      Note shall be amended by deleting all references contained therein to the phrase
      “January 1, 2008” and substituting therefore the phrase “January 1,
      2009”.

    

    3. Attachment;
      Continued Effectiveness of Note.
      This
      Fourth Amendment is attached to and forms an integral part of the Note. All
      of
      the provisions of the Note, as amended by this Fourth Amendment, shall remain
      in
      full force and effect.

    

    4. Effective
      Date.
      This
      Fourth Amendment shall be effective as of March 21, 2007.

    

    5. Counterparts.
      This
      Fourth Amendment may be signed in multiple counterparts, each of which shall
      be
      deemed to be an original and all of which, taken together, shall constitute
      one
      and the same instrument.

    

    DYADIC
      INTERNATIONAL, INC., a Delaware

    corporation

    

    

    

    Accepted:

    

    MARK
      A.
      EMALFARB TRUST U/A/D October 1, 1987

    

    

    

    By:
      /s/
      Mark A. Emalfarb__________

    Mark
      A.
      Emalfarb, Trustee

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