- -------------------------------------------------- ----------------------------- ENTITY NAME STATE OF INCORPORATION - -------------------------------------------------- ----------------------------- - -------------------------------------------------- ----------------------------- Atlas Energy Holdings, Inc. Delaware - -------------------------------------------------- ----------------------------- Atlas America, Inc. Delaware - -------------------------------------------------- ----------------------------- Atlas America, Inc. Pennsylvania - -------------------------------------------------- ----------------------------- AIC, Inc. Delaware - -------------------------------------------------- ----------------------------- Anthem Securities, Inc. Pennsylvania - -------------------------------------------------- ----------------------------- Atlas Energy Corporation Ohio - -------------------------------------------------- ----------------------------- Atlas Energy Group, Inc. 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Delaware - -------------------------------------------------- ----------------------------- Resource Properties XLVI, Inc. Delaware - -------------------------------------------------- ----------------------------- 2 - -------------------------------------------------- ----------------------------- ENTITY NAME STATE OF INCORPORATION - -------------------------------------------------- ----------------------------- - -------------------------------------------------- ----------------------------- Resource Properties XLVII, Inc. Delaware - -------------------------------------------------- ----------------------------- Resource Properties XLIX, Inc. Delaware - -------------------------------------------------- ----------------------------- Resource Properties 50, Inc. Delaware - -------------------------------------------------- ----------------------------- Resource Properties 51, Inc. 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