Cst Brands Inc. (CST): Billionaire Mario Gabelli’s GAMCO Investors Ups Stake

Page 18 of 18 – SEC Filing

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(f) under the securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with all other Reporting Entities (as such term is defined in the Schedule 13D referred to below) on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Common Stock of CST Brands, Inc. and that this Agreement be included as an Exhibit to such joint filing.  This Agreement may be executed in any number of counterparts all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement this June 2, 2016.

	MARIO J. GABELLI GGCP, INC. MJG ASSOCIATES, INC. GABELLI FOUNDATION, INC. MJG-IV LIMITED PARTNERSHIP By:/s/ Douglas R. Jamieson       Douglas R. Jamieson      Attorney-in-Fact
	TETON ADVISORS, INC. By: /s/ David Goldman        David Goldman        General Counsel – Teton Advisors, Inc.
	ASSOCIATED CAPITAL GROUP, INC. By:/s/ Kevin Handwerker   Kevin Handwerker General Counsel & Secretary – Associated Capital Group, Inc.
	GAMCO ASSET MANAGEMENT INC. GAMCO INVESTORS, INC. GABELLI SECURITIES, INC. G.RESEARCH, INC. GABELLI FUNDS, LLC By:/s/ Douglas R. Jamieson      Douglas R. Jamieson      President & Chief Operating Officer – GAMCO Investors, Inc.      President – GAMCO Asset Management Inc.      Vice President – Gabelli Securities, Inc.      Secretary – G.research, Inc.       President & Chief Operating Officer – sole member of           Gabelli Funds, LLC

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