X0303 4 2010-03-11 0 0001358831 LEGACY RESERVES LP LGCY 0001385051 Brown Cary D 303 W. WALL STREET, SUITE 1400 MIDLAND TX 79701 1 1 1 0 Chairman and CEO Units representing limited partner interests 2010-03-11 4 M 0 20000 17 A 974265 D Units representing limited partner interests 2010-03-11 4 D 0 20000 22.99 D 954265 D Units representing limited partner interests 4425080 I See footnotes Unit Options (right to buy) 17 2010-03-11 4 M 0 20000 0 D 2009-03-15 2011-07-17 Units 20000 0 D On March 11, 2010, the reporting person exercised 20,000 vested unit options at an exercise price of $17.00 per unit, and in connection with such exercise, to cover the exercise price and tax withholding obligations, agreed to transfer the units to be received upon such exercise to the Issuer in exchange for a payment by the Issuer of $22.99 per unit, the closing price of the Issuer's units on the NASDAQ Global Select Market on such date. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these units in this report shall not be deemed an admission of beneficial ownership of all of the reported units for purposes of Section 16 or for any other purpose. Includes 4,391,408 units held by Moriah Properties, Ltd. ("Moriah Properties") and 33,672 units owned by Moriah Resources, Inc. ("Moriah Resources"). Moriah Properties and Moriah Resources are entities owned and controlled by Mr. Dale A. Brown and Mr. Cary D. Brown. Chairman and Chief Executive Officer of Legacy Reserves GP, LLC, the general partner of Legacy Reserves LP. /s/ Cary D. Brown 2010-03-15