0000080255-10-000554 SC 13G 1 20101008 20101008 ATLAS ENERGY, INC. 0001279228 4922 510404430 DE 1231 SC 13G 34 005-80454 101116101 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 PRICE T ROWE ASSOCIATES INC /MD/ 0000080255 6200 520556948 MD 1231 SC 13G 100 EAST PRATT ST BALTIMORE MD 21202 (410)345- P.O. BOX 89000 BALTIMORE MD 21289 SC 13G 1 atls13gsep10.txt ATLS AS OF 9/30/2010