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
INSURANCE COMPANIES AS DEFINED IN SECTION 3(a)(19) OF THE ACT:
National Indemnity Company
Berkshire Hathaway Homestate Insurance Company
British Insurance Company of Cayman
GEICO Advantage Insurance Company
GEICO Secure Insurance Company
GEICO Choice Insurance Company
National FireĀ & Marine Insurance Company