Contract

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 “Credit Agreement”);

     WHEREAS, in connection with the Credit Agreement, the Initial US Borrower, the Surviving US Borrower and certain of its Affiliates (other than the Additional Grantor) have entered into the Guarantee and Collateral Agreement, dated as of November 23, 2005 (as amended, supplemented or otherwise modified from time to time, the “Guarantee and Collateral Agreement”) in favor of the Administrative Agent for the benefit of the Administrative Agent, the Canadian Administrative Agent and the Lenders;

     WHEREAS, the Credit Agreement requires the Additional Grantor to become a party to the Guarantee and Collateral Agreement; and

     WHEREAS, the Additional Grantor has agreed to execute and deliver this Assumption Agreement in order to become a party to the Guarantee and Collateral Agreement;

     NOW, THEREFORE, IT IS AGREED:

     1. Guarantee and Collateral Agreement. By executing and delivering this Assumption Agreement, the Additional Grantor, as provided in Section 8.14 of the Guarantee and Collateral Agreement, hereby becomes a party to the Guarantee and Collateral Agreement as a Grantor thereunder with the same force and effect as if originally named therein as a Grantor and, without limiting the generality of the foregoing, hereby expressly assumes all obligations and liabilities of a Grantor thereunder. The information set forth in Annex 1-A hereto is hereby added to the information set forth in the Schedules to the Guarantee and Collateral Agreement. The Additional Grantor hereby represents and warrants, to the extent applicable, that each of the representations and warranties contained in Section 4 of the Guarantee and Collateral Agreement is true and correct on and as of the date hereof (after giving effect to this Assumption Agreement) as if made on and as of such date.

     2. GOVERNING LAW. THIS ASSUMPTION AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

     IN WITNESS WHEREOF, the undersigned has caused this Assumption Agreement to be duly executed and delivered as of the date first above written.

	SS&C TECHNOLOGIES CONNECTICUT, LLC
	By:	/s/ Xxxxxxx X. Xxxxxxx
		Name:	Xxxxxxx X. Xxxxxxx
		Title:	Senior Vice President

Annex 1-A to
Assumption Agreement

Supplement to Schedule 1

SS&C Technologies Connecticut, LLC
00 Xxxxxxxxx Xx
Xxxxxxx, XX 00000

Supplement to Schedule 2

Pledged Notes:

Issuer		Payee		Principal Amount
SS&C Technologies Canada Corp.		SS&C Technologies Connecticut, LLC		$	70,465,500

Supplement to Schedule 3

Uniform Commercial Code Filings

Grantor		Office
SS&C Technologies Connecticut, LLC		Connecticut Secretary of State

Supplement to Schedule 4

		Jurisdiction of		Location of Chief
Grantor		Organization		Executive Office
SS&C Technologies Connecticut,		Connecticut		00 Xxxxxxxxx Xxxx
LLC [Note: include # appearing on Articles				Xxxxxxx, XX 00000
when “stamped” by CT]

Supplement to Schedule 5

None.

Supplement to Schedule 6

None.