X0202 4 2007-10-22 0 0001362705 Constellation Energy Partners LLC CEP 0000806085 LEHMAN BROTHERS HOLDINGS INC 745 SEVENTH AVENUE NEW YORK NY 10019 0 0 1 0 Common Units 2007-10-22 4 S 0 23900 36.2193 D 2161490 I See Footnote Common Units 2007-10-23 4 S 0 24200 36.0603 D 2137290 I See Footnote Common Units 2007-10-24 4 S 0 24600 36.3685 D 2112690 I See Footnote By indirect, wholly-owned subsidiaries of the Reporting Person: 293,500 shares held by Lehman Brothers Inc. and 1,867,990 shares held by Lehman Brothers MLP Opportunity Fund LP. By indirect, wholly-owned subsidiaries of the Reporting Person: 269,300 shares held by Lehman Brothers Inc. and 1,867,990 shares held by Lehman Brothers MLP Opportunity Fund LP. By indirect, wholly-owned subsidiaries of the Reporting Person: 244,700 shares held by Lehman Brothers Inc. and 1,867,990 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 (CEP) Designated Filer: Lehman Brothers Holdings Inc. 745 Seventh Avenue New York, NY 10019 Other Joint Filer Information: Lehman Brothers Inc. 745 Seventh Avenue New York, NY 10019, a Delaware corporation, a direct wholly-owned subsidiary of the Reporting Person. Lehman Brothers MLP Opportunity Associates LLC, 399 Park Avenue New York, NY 10022, a Delaware limited liability company, a direct wholly-owned subsidiary of the Reporting Person. Lehman Brothers MLP Opportunity Associates LP, 399 Park Avenue New York, NY 10022, a Delaware limited partnership, a direct wholly-owned subsidiary of Lehman Brothers MLP Opportunity Associates LLC and general partner of Lehman Brothers MLP Opportunity Fund LP. Lehman Brothers MLP Opportunity Fund LP, 399 Park Avenue New York, NY 10022, a Delaware limited partnership. /s/ Barrett S. DiPaolo 2007-10-24