BUTLER HEALTH SYSTEM IS THE SOLE CORPORATE MEMBER TO THE HOSPITAL (BUTLER HEALTHCARE PROVIDERS), THE PHYSICIANS' PRACTICE GROUP (BUTLER MEDICAL PROVIDERS), THE REAL ESTATE COMPANY (NIXSAR CORPORATION), THE FOUNDATION (BUTLER HEALTH SYSTEM FOUNDATION), AND CLARION HEALTHCARE SYSTEM, INC. BUTLER HEALTH SYSTEM DIRECTLY HOLDS THE BUILDING ASSETS FOR THE PRIMARY CARE ASSOCIATES PHYSICIAN PRACTICE AND A 51% INTEREST IN THE BUTLER AMBULATORY SURGERY CENTER.