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
MedPro Group, Inc.
General Re 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 & Casualty Company
Government Employees Insurance Company
The Medical Protective Company
Berkshire Hathaway Assurance Corporation
Berkshire Hathaway Life Insurance Company of Nebraska
Berkshire Hathaway Homestate Insurance Company
Princeton Insurance Company
National Indemnity Company of Mid America
Berkshire Hathaway Specialty Insurance Company
AmGUARD Insurance Company
Finial
Reinsurance Company
Oak River Insurance Company
NorGUARD Insurance Company
Old
United Casualty Company
Central States Indemnity Company of Omaha
PLICO Inc.
Genesis Insurance
Company
GEICO Indemnity Company
General Star National Insurance Company
Mount Vernon Fire Insurance Company