X0303 4 2010-06-17 0 0001364541 EAGLE ROCK ENERGY PARTNERS L P EROC 0001478063 Langemeier Jeffrey D EAGLE ROCK ENERGY PARTNERS, L.P. P.O. BOX 2968 HOUSTON TX 77252 0 1 0 0 VP & Controller, Corp & Mids Common Units Representing Limited Partner Interest 2010-06-17 4 X 0 4715 2.50 A 24715 D Subscription Rights 2.50 2010-06-17 4 X 0 4715 0 D 2010-06-01 2010-06-30 Common Units and Warrants 4715 0 D Warrants 6.00 2010-06-17 4 X 0 4715 2.50 A 2010-08-15 2012-05-15 Common Units 4715 4715 D Represents common units that will be received, after the close of the rights offering, from the exercise of subscription rights. Mr. Langemeier has also elected to exercise the over-subscription privilege associated with his exercised rights and he will receive additional common units to the extent that his over-subscription is filled. Represents the exercise price of each subscription right entitling the holder to acquire, for $2.50 in cash, (i) one common unit and (ii) one warrant to purchase an additional common unit for $6.00 on the dates specified in Footnote 5. Each Warrant entitles the holder to acquire, for $6.00 in cash, one common unit on the dates specified in Footnote 5. Represents warrants that will be received, after the close of the rights offering, from the exercise of subscription rights. Mr. Langemeier has elected to exercise the over-subscription privilege associated with his exercised rights and he will receive additional warrants to the extent that his over-subscription is filled. Warrants are only exercisable on each of August 15, 2010, November 15, 2010, March 15, 2011, May 15, 2011, August 15, 2011, November 15, 2011, March 15, 2012 and May 15, 2012. The warrants will be freely tradeable starting on or about July 1, 2010 until May 15, 2012. The reporting person is Vice President and Controller, Midstream and Corporate of Eagle Rock Energy G&P, LLC the general partner of Eagle Rock Energy GP, L.P. the general partner of registrant. /s/ Charles C. Boettcher, Attorney-In-Fact 2010-06-17