X0303 4 2011-04-07 0001090403 CATALYST HEALTH SOLUTIONS, INC. CHSI 0001126328 PRINCIPAL FINANCIAL GROUP INC 711 HIGH STREET DES MOINES IA 50392 0 0 1 0 0001094589 PRINCIPAL FINANCIAL SERVICES INC 711 HIGH STREET DES MOINES IA 50392 0 0 1 0 0000009712 PRINCIPAL LIFE INSURANCE CO 711 HIGH STREET DES MOINES IA 50392 0 0 1 0 0001126327 PRINCIPAL HOLDING CO 711 HIGH STREET DES MOINES IA 50392 0 0 1 0 Common Stock 2011-04-07 4 S 0 1000000 50.62 D 4227500 I By Subsidiary Common Stock 2011-04-08 4 S 0 825000 50.62 D 3402500 I By Subsidiary 2,602,500 of these shares are owned directly by Principal Holding Company, a wholly-owned subsidiary of Principal Life Insurance Company, a wholly-owned subsidiary of Principal Financial Services, Inc., a wholly-owned subsidiary of Principal Financial Group, Inc. The remaining 800,000 shares were contributed by Principal Holding Company to Final Sequel Newco, LLC, a Delaware limited liability company of which Principal Holding Company is a 50 percent owner. Principal Life Insurance Company, Principal Financial Services, Inc. and Principal Financial Group, Inc. are indirect beneficial owners of the reported securities. Karen E. Shaff, Executive Vice President and General Counsel, Principal Financial Group 2011-04-11