0000919574-10-001562 SC 13G 1 20100216 20100216 ATLAS ENERGY, INC. 0001279228 4922 510404430 DE 1231 SC 13G 34 005-80454 10607391 WESTPOINTE CORPORATE CENTER ONE 1550 CORAOPOLIS HEIGHTS RD. 2ND. FLOOR MOONTOWNSHIP PA 15108 412-262-2830 WESTPOINTE CORPORATE CENTER ONE 1550 CORAOPOLIS HEIGHTS RD. 2ND. FLOOR MOONTOWNSHIP PA 15108 ATLAS AMERICA INC 20040209 PENNANT CAPITAL MANAGEMENT LLC 0001168664 000000000 SC 13G 26 MAIN STREET SUITE 203 CHATHAM NJ 07928 9737011100 26 MAIN STREET SUITE 203 CHATHAM NJ 07928 PENNANT CAPITAL MANAGEMENT INC 20020307 SC 13G 1 d1072984_13-g.htm