X0202 4 2007-11-20 0 0001364541 EAGLE ROCK ENERGY PARTNERS L P EROC 0000806085 LEHMAN BROTHERS HOLDINGS INC 745 SEVENTH AVENUE NEW YORK NY 10019 0 0 1 0 Common Units 2007-11-20 4 L 0 254 20.25 A 7646473 I See Footnote Common Units 2008-01-07 4 S 0 500 17.84 D 7645973 I See Footnote Common Units 2008-01-07 4 S 0 5400 17.9 D 7640573 I See Footnote Common Units 2008-01-07 4 S 0 4500 17.91 D 7636073 I See Footnote Common Units 2008-01-07 4 S 0 100 17.915 D 7635973 I See Footnote Common Units 2008-01-07 4 S 0 400 17.9175 D 7635573 I See Footnote Common Units 2008-01-07 4 S 0 1850 17.92 D 7633723 I See Footnote Common Units 2008-01-07 4 S 0 2043 17.93 D 7631680 I See Footnote Common Units 2008-01-07 4 S 0 300 17.9375 D 7631380 I See Footnote Common Units 2008-01-07 4 S 0 1307 17.94 D 7630073 I See Footnote Common Units 2008-01-07 4 S 0 500 17.945 D 7629573 I See Footnote Common Units 2008-01-07 4 S 0 4000 17.95 D 7625573 I See Footnote Common Units 2008-01-07 4 S 0 907 17.96 D 7624666 I See Footnote Common Units 2008-01-07 4 S 0 300 17.9675 D 7624366 I See Footnote Common Units 2008-01-07 4 S 0 2593 17.97 D 7621773 I See Footnote Common Units 2008-01-07 4 S 0 1200 17.975 D 7620573 I See Footnote Common Units 2008-01-07 4 S 0 100 17.9775 D 7620473 I See Footnote Common Units 2008-01-07 4 S 0 4100 17.98 D 7616373 I See Footnote Common Units 2008-01-07 4 S 0 400 17.985 D 7615973 I See Footnote Common Units 2008-01-07 4 S 0 800 17.9875 D 7615173 I See Footnote Common Units 2008-01-07 4 S 0 4900 17.99 D 7610273 I See Footnote Common Units 2008-01-07 4 S 0 200 17.9925 D 7610073 I See Footnote Common Units 2008-01-07 4 S 0 200 17.995 D 7609873 I See Footnote Common Units 2008-01-07 4 S 0 600 18 D 7609273 I See Footnote Common Units 2008-01-07 4 S 0 612 18.01 D 7608661 I See Footnote Common Units 2008-01-07 4 S 0 200 18.02 D 7608461 I See Footnote Common Units 2008-01-07 4 S 0 100 18.03 D 7608361 I See Footnote Common Units 2008-01-07 4 S 0 200 18.04 D 7608161 I See Footnote Common Units 2008-01-07 4 S 0 588 18.07 D 7607573 I See Footnote Common Units 2008-01-07 4 S 0 675 18.09 D 7606898 I See Footnote By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,674,421 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,673,921 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,668,521 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,664,021 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,663,921 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,663,521 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,661,671 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,659,628 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,659,328 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,658,021 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,657,521 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,653,521 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,652,614 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,652,314 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,649,721 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,648,521 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,648,421 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,644,321 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,643,921 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,643,121 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,638,221 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,638,021 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,637,821 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,637,221 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,636,609 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,636,409 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,636,309 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,636,109 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,635,521 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP By direct and indirect, wholly-owned subsidiaries of the Reporting Person: 2,634,846 common units held by Lehman Brothers Inc.; 3,590,859 common units held by Lehman Brothers MLP Opportunity Fund LP; and 1,381,193 common units held by Lehman Brothers MLP Partners, LP Because the SEC's electronic filing system does not allow for the disclosure of more than 30 transactions on one Form 4, the Reporting Persons are filing two simultaneous Forms 4 to report their reportable transactions, both of which together shall be deemed a single report filed on this date. This is the first Form 4 of the two filings. JOINT FILER INFORMATION: Title of Derivative Securities: Common Units Issuer & Ticker Symbol: Eagle Rock Energy Partners L P (EROC) 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. LB I Group Inc., 399 Park Avenue, New York NY 10022, a Delaware corporation, a direct wholly-owned subsidiary of Lehman Brothers Inc. 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 and general partner of Lehman Brothers MLP Opportunity Associates LP. Lehman Brothers MLP Opportunity Associates LP, 399 Park Avenue, New York, NY 10022, a Delaware limited partnership, 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. Lehman Brothers MLP Associates, LP, 399 Park Avenue New York, NY 10022, a Delaware limited partnership, wholly-owned by LB I Group Inc. Lehman Brothers MLP Partners, LP, 399 Park Avenue, New York, NY 10022 a Delaware limited partnership, wholly-owned by Lehman Brothers MLP Associates, LP. /s/ Barrett S. DiPaolo 2008-01-09