Exhibit 10.1

     ASSUMPTION AGREEMENT, dated as of August 31, 2009, made by SS&C Technologies Connecticut, LLC (the “ Additional Grantor ”), in favor of JPMorgan Chase Bank, N.A., as administrative agent (in such capacity, the “ Administrative Agent ”) for the banks and other financial institutions or entities (the “ Lenders ”) parties to the Credit Agreement referred to below. All capitalized terms not defined herein shall have the meaning ascribed to them in such Credit Agreement.

W I T N E S S E T H :

     WHEREAS, Sunshine Acquisition II, Inc., (the “ Initial US Borrower ”), SS&C Technologies, Inc., (the “ Surviving US Borrower ”), SS&C Technologies Canada Corp., as CDN Borrower, the Lenders, JPMorgan Chase Bank, N.A., Toronto Branch, as Canadian administrative agent (the “ Canadian Administrative Agent ”) and the Administrative Agent have entered into a Credit Agreement, dated as of November 23, 2005 (as amended, supplemented or otherwise modified from time to time, the “