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

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

National Indemnity Company

Cypress Insurance Company

Government Employees Insurance Company 

AmGUARD Insurance Company

NorGUARD Insurance Company

General Reinsurance Corporation

EastGUARD Insurance Company

WestGUARD Insurance Company

Note: No Common Stock of HP Inc. is held directly by Berkshire Hathaway Inc. or by Warren E. Buffett, an individual who may be deemed to control Berkshire Hathaway Inc.