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 Common Stock of Ally Financial Inc. 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, 2024	/s/ Warren E. Buffett
	Warren E. Buffett
	Berkshire Hathaway Inc.
Dated: February 14, 2024	/s/ Warren E. Buffett
	By: Warren E. Buffett Title: Chairman of the Board
	National Indemnity Company
Dated: February 14, 2024	/s/ Marc D. Hamburg
	By: Marc D. Hamburg Title: Chairman of the Board
	GEICO Corporation
Dated: February 14, 2024	/s/ Todd A. Combs
	By: Todd A. Combs
	Title: President
	Berkshire Hathaway Life Insurance Company of Nebraska
Dated: February 14, 2024	/s/ Dale D. Geistkemper
	By: Dale D. Geistkemper
	Title: Treasurer
	BHG Life Insurance Company
Dated: February 14, 2024	/s/ Dale D. Geistkemper
	By: Dale D. Geistkemper
	Title: Treasurer
	British Insurance Company of Cayman
Dated: February 14, 2024	/s/ Dale D. Geistkemper
	By: Dale D. Geistkemper
	Title: Treasurer

	Columbia Insurance Company
Dated: February 14, 2024	/s/ Marc D. Hamburg
	By: Marc D. Hamburg
	Title: Chairman of the Board
	GEICO Marine Insurance Company
Dated: February 14, 2024	/s/ Todd A. Combs
	By Todd A. Combs
	Title: President
	GEICO Secure Insurance Company
Dated: February 14, 2024	/s/ Todd A. Combs
	by Todd A. Combs
	Title: President
	Berkshire Hathaway Consolidated Pension Plan Master Trust
Dated: February 14, 2024	/s/ Mark D. Millard
	By Mark D. Millard
	Title: Vice President - Berkshire Hathaway
	Precision Castparts Corp. Master Trust
Dated: February 14, 2024	/s/ Shawn Hagel
	by Shawn Hagel
	Title: Executive Vice President - Precision Castparts
	BNSF Master Retirement Trust
Dated: February 14, 2024	/s/ Paul Bischler
	by Paul Bischler
	Title: Vice President - Burlington Northern Santa Fe, LLC