0000052388-15-000047 SC 13G/A 1 20150210 20150210 ENTERCOM COMMUNICATIONS CORP 0001067837 4832 231701044 PA 1231 SC 13G/A 34 005-55345 15592446 401 CITY AVENUE SUITE 809 BALA CYNWYD PA 19004 610-660-5610 401 CITY AVENUE SUITE 809 BALA CYNWYD PA 19004 AMERICAN CENTURY INVESTMENT MANAGEMENT INC 0000052388 0000 440640487 DE 1231 SC 13G/A 4500 MAIN STREET KANSAS CITY MO 64111 816-531-5575 4500 MAIN STREET KANSAS CITY MO 64111 INVESTORS RESEARCH CORP 19920929 SC 13G/A 1 entercom13g-a1.htm SCHEDULE 13G/A