SCHEDULE 13G

EXHIBIT B

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1)

The undersigned persons hereby agree that reports on Schedule 13G, and amendments thereto, with respect to the Series A SiriusXM Common Stock of Liberty Media Corporation may be filed in a single statement on behalf of each of such persons, and further, each of such persons designates Warren E. Buffett as its agent and Attorney-in-Fact for the purpose of executing any and all Schedule 13G filings required to be made by it with the Securities and Exchange Commission.

Dated: February 14, 2017	/S/ Warren E. Buffett
	Warren E. Buffett
	Berkshire Hathaway Inc.
Dated: February 14, 2017	/S/ Warren E. Buffett
	By:	Warren E. Buffett
	Title:	Chairman of the Board
	National Indemnity Company
Dated: February 14, 2017	/S/ Marc D. Hamburg
	By:	Marc D. Hamburg
	Title:	Chairman of the Board
	GEICO Corporation
Dated: February 14, 2017	/S/ William E. Roberts
	By:	William E. Roberts
	Title:	President
	Government Employees Insurance Company
Dated: February 14, 2017	/S/ William E. Roberts
	By:	William E. Roberts
	Title:	President

	FlightSafety International Inc. Retirement Income Plan
Dated: February 14, 2017	/S/ Bruce Whitman
	By:	Bruce Whitman
	Title:	President and Chief Executive Officer,
	FlightSafety International, Inc.
	National Fire & Marine Insurance Company
Dated: February 14, 2017	/S/ Marc D. Hamburg
	By:	Marc D. Hamburg
	Title:	Chairman of the Board
	GEICO Indemnity Company
Dated: February 14, 2017	/S/ William E. Roberts
	By:	William E. Roberts
	Title:	President
	Fruit of the Loom Pension Trust
Dated: February 14, 2017	/S/ Melissa Burgess-Taylor
	By:	Melissa Burgess-Taylor
	Title:	President and Chief Executive Officer, Fruit of the Loom
	GEICO Corporation Pension Plan Trust
Dated: February 14, 2017	/S/ William E. Roberts
	By:	William E. Roberts
	Title:	President, GEICO Corporation
	Johns Manville Corporation Master Pension Plan
Dated: February 14, 2017	/S/ Mary Rhinehart
	By:	Mary Rhinehart
	Title: President and Chief Executive Officer Johns Manville Corporation
	BNSF Master Retirement Trust
Dated: February 14, 2017	/S/ Julie Piggott
	By:	Julie Piggott
	Title:	Vice President, Burlington Northern Santa Fe, LLC

	General Re Corp. Employee Retirement Trust
Dated: February 14, 2017	/S/ Kara Raiguel
	By:	Kara Raiguel
	Title:	President, General Re Corporation
	Lubrizol Corp. Master Trust Pension
Dated: February 14, 2017	/S/ Brian Valentine
	By:	Brian Valentine
	Title:	Senior Vice President, The Lubrizol Corporation
Dated: February 14, 2017	/s/ R. Ted Weschler
	R. Ted Weschler