Exhibit 10.9

Business Subsidy Agreement

THIS AGREEMENT is made and entered into as of the 7^th day of December, 2010, by and between the Economic Development Authority in and for the City of Coon Rapids (the “City”) and Biovest International, Inc. (the “Borrower”). The provisions herein constitute the “business subsidy agreement” for purposes of the Minnesota Business Subsidy Act (Minnesota Statutes Sections 116J.993-995 and its successor statute.)

Section 1. Definitions. In this Agreement, unless a different meaning clearly appears from the context:

(a) “Benefit Date” means the date when the Borrower occupies the Project, but shall be no later than March 31, 2011.

(b) “City” means the Economic Development Authority in and for the City of Coon Rapids.

(c) “Compliance Date” means the date that is two (2) years after the Benefit Date.

(d) “Borrower” means Biovest International, Inc., a Delaware corporation.

(e) “Development Property” means the real property legally described as TRACT B R.L.S. NO 86 .

(f) “Initial Disbursement Date” means the date of the first disbursement of any Loan Proceeds by the City to the Borrower.

(g) “Jurisdiction” means a city or township.

(h) “Leveraged Funds” means the funds described in Section 2.3. of the Loan Agreement.

(i) “Loan” means the funds loaned by the City to the Borrower pursuant to the Loan Agreement.

(j) “Loan Agreement” means the agreement and documents stating the terms and conditions of the Loan.

(k) “Loan Proceeds” means the funds disbursed to the Borrower pursuant to this Agreement and any proceeds thereof.

(l) “Project” means the Borrower’s construction of tenant improvements to the real property it leases at 8500 Evergreen Boulevard, Coon Rapids, MN 55433 as generally discussed in the application for MIF which resulted in the Grant Agreement.

(m) “Termination Date” means the date of the final payment made to the City.

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Section 2. Agreement. The Borrower acknowledges and agrees that the provisions of Minnesota’s Business Subsidy Act apply to this Agreement, as Borrower is receiving under the terms of this Agreement government assistance.

Section 3. Reporting. The Borrower shall provide to the City information regarding goals and results for two years after the benefit date or until the goals are met, whichever is later. This reporting requirement will expire if the goals are met by the Compliance Date. If the goals are not met, the Borrower must continue to provide information on the loan until the loan is repaid. If the report is not submitted by March 15, the City shall mail the Borrower a warning within one week of the required filing date. If, after 14 days of the postmarked date of the warning, the Borrower fails to provide a report, the Borrower must pay to the City a penalty of $100 for each subsequent day until the report is filed. The maximum penalty shall not exceed $1,000.

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IN WITNESS WHEREOF, the City has caused this Agreement to be duly executed in its name and behalf and the Borrower has caused this Agreement to be duly executed in its name and behalf as of the date first written above.

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