X0202 3 2007-07-25 0 0001362705 Constellation Energy Partners LLC CEP 0000806085 LEHMAN BROTHERS HOLDINGS INC 745 SEVENTH AVENUE NEW YORK NY 10019 0 0 1 0 Common Stock 1749036 I See Footnote By indirect, wholly-owned subsidiaries of the Reporting Person: 603,450 shares held by Lehman Brothers Inc. and 1,164,736 shares held by Lehman Brothers MLP Opportunity Fund LP. Joint Filer Information Title of Derivative Securities: Common Stock Issuer & Ticker Symbol: Constellation Energy Partners LLC Designated Filer: Lehman Brothers Holdings Inc. 745 Seventh Avenue New York, NY 10019 Other Joint Filer Information (all filers share the Reporting Person's address): Lehman Brothers Inc., a Delaware corporation, a direct wholly-owned subsidiary of the Reporting Person. Lehman Brothers MLP Opportunity Associates LLC, a Delaware limited liability company, a direct wholly-owned subsidiary of the Reporting Person. Lehman Brothers MLP Opportunity Associates LP, a Delaware limited partnership, a direct wholly-owned subsidiary of Lehman Brothers MLP Opportunity Associates LLC and general partner of LB MLP Opp. Fund LP Lehman Brothers MLP Opportunity Fund LP, a Delaware limited partnership. /s/ James J. Killerlane III 2007-08-06