X0304 4 2012-02-18 0 0001358831 LEGACY RESERVES LP LGCY 0001385048 Morris William M 303 W. WALL STREET, SUITE 1400 MIDLAND TX 79701 0 1 0 0 VP and CAO Units representing limited partner interests 2012-02-18 4 M 0 3787 0.00 A 8864 D Units representing limited partner interests 2012-02-18 4 D 0 3787 29.67 D 5077 D Phantom Units 2012-02-18 4 M 0 3787 0.00 D Units 3787 17219 D Each phantom unit represents the economic equivalent of a unit representing a limited partner interest in Legacy Reserves LP. Reflects the closing price of the units on February 17, 2012. Phantom units vest annually in one-third increments on February 18th of each applicable year and are payable in cash or, at the discretion of the compensation committee of the board of directors of the general partner of the Issuer, in units. Pursuant to the achievement of certain objective, performance-based criteria, 753 phantom units and 542 phantom units, or 32.27% each of the phantom units eligible to vest for the year ended December 31, 2011, granted on February 18, 2010 and February 18, 2011, respectively, vested. Accordingly, the remaining aggregate 2,717 phantom units eligible to vest during 2012 with respect to the February 18, 2010 and February 18, 2011 phantom unit grants did not vest and were forfeited. Additionally, 1,462 phantom units (the second tranche of the 2010 subjective phantom unit grant) and 1,030 phantom units (the first tranche of the 2011 subjective phantom unit grant), vested. Includes the remaining 3,794 phantom units, 5,417 phantom units and 8,008 phantom units from the phantom units granted on February 18, 2010, February 18, 2011 and February 2, 2012, respectively. Vice President and Chief Accounting Officer of Legacy Reserves GP, LLC, the general partner of Legacy Reserves LP. /s/ William M. Morris 2012-02-21