Rex Energy Corporation $REXX Top 5 Holders of Institutional Holdings 1. FRANKLIN RESOURCES INC 9,051,987 2. PRIMECAP MANAGEMENT CO/CA/ 3,645,000 3. MACKAY SHIELDS LLC 3,268,830 4. VANGUARD GROUP INC 1,852,719 5. BLACKROCK INSTITUTIONAL TRUST COMPANY, N.A. 1,419,093 Read More: http://www.nasdaq.com/symbol/rexx/ownership-summary