Billionaire Warren Buffett Raises Stake in Wells Fargo & Company (WFC) to 10%

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SCHEDULE 13G

EXHIBIT A

RELEVANT SUBSIDIARIES AND MEMBERS OF FILING GROUP

PARENT HOLDING COMPANIES OR CONTROL PERSONS:

Warren E. Buffett (an individual who may be deemed to control Berkshire Hathaway Inc.)

Berkshire Hathaway Inc.

GEICO
Corporation

General Re Corporation

U.S. Investment Corporation

Medical Protective Corporation

Central States of Omaha Companies, Inc.

Boat America Corporation

INSURANCE COMPANIES AS
DEFINED IN SECTION 3(a)(19) OF THE ACT:

National Indemnity Company

National Fire & Marine Insurance Company

Columbia Insurance Company

National Liability & Fire Insurance Company

Cypress Insurance Company

National Indemnity Company of the South

Redwood Fire and Casualty Company

Government Employees Insurance Company

General Reinsurance Corporation

General Re Life Corporation

General Star Indemnity Company

Mount Vernon Fire Insurance Company

U.S. Underwriters Insurance Company

United States Liability Insurance Company

The Medical Protective Company

Berkshire Hathaway Assurance Corporation

Berkshire Hathaway Life Insurance Company of Nebraska

Berkshire Hathaway Homestate Insurance Company

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