| 2010-01-26 | MARKWEST ENERGY PARTNERS L P | S | ▼−19.5K sh | $29.75 | ▼−$580K | 5,545,466 |
| 2010-01-26 | MARKWEST ENERGY PARTNERS L P | S | ▼−3,000 sh | $29.74 | ▼−$89.2K | 911,990 |
| 2010-01-25 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,000 sh | $29.78 | ▼−$59.6K | 914,990 |
| 2010-01-25 | MARKWEST ENERGY PARTNERS L P | S | ▼−13K sh | $29.78 | ▼−$387K | 5,564,966 |
| 2010-01-21 | MARKWEST ENERGY PARTNERS L P | S | ▼−13K sh | $29.58 | ▼−$385K | 5,577,966 |
| 2010-01-21 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,000 sh | $29.60 | ▼−$59.2K | 916,990 |
| 2010-01-19 | MARKWEST ENERGY PARTNERS L P | S | ▼−19.5K sh | $29.98 | ▼−$585K | 5,590,966 |
| 2010-01-19 | MARKWEST ENERGY PARTNERS L P | S | ▼−3,000 sh | $29.97 | ▼−$89.9K | 918,990 |
| 2010-01-14 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,000 sh | $29.07 | ▼−$58.1K | 921,990 |
| 2010-01-14 | MARKWEST ENERGY PARTNERS L P | S | ▼−13K sh | $29.06 | ▼−$378K | 5,610,466 |
| 2010-01-11 | MARKWEST ENERGY PARTNERS L P | S | ▼−3,000 sh | $30.11 | ▼−$90.3K | 923,990 |
| 2010-01-11 | MARKWEST ENERGY PARTNERS L P | S | ▼−19.5K sh | $30.11 | ▼−$587K | 5,623,466 |
| 2010-01-04 | MARKWEST ENERGY PARTNERS L P | S | ▼−84.5K sh | $30.03 | ▼−$2.54M | 5,642,966 |
| 2010-01-04 | MARKWEST ENERGY PARTNERS L P | S | ▼−13K sh | $30.00 | ▼−$390K | 926,990 |
| 2009-12-08 | MARKWEST ENERGY PARTNERS L P | S | ▼−15.5K sh | $25.20 | ▼−$391K | 5,727,466 |
| 2009-12-08 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,500 sh | $25.20 | ▼−$63K | 939,990 |
| 2009-12-07 | MARKWEST ENERGY PARTNERS L P | S | ▼−15.5K sh | $25.30 | ▼−$392K | 5,742,966 |
| 2009-12-07 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,500 sh | $25.30 | ▼−$63.3K | 942,490 |
| 2009-12-04 | MARKWEST ENERGY PARTNERS L P | S | ▼−16.5K sh | $24.97 | ▼−$412K | 5,758,466 |
| 2009-12-04 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,500 sh | $24.97 | ▼−$62.4K | 944,990 |
| 2009-12-03 | MARKWEST ENERGY PARTNERS L P | S | ▼−17.5K sh | $25.50 | ▼−$446K | 5,774,966 |
| 2009-12-03 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,500 sh | $25.50 | ▼−$63.8K | 947,490 |
| 2009-12-02 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,500 sh | $25.48 | ▼−$63.7K | 949,990 |
| 2009-12-02 | MARKWEST ENERGY PARTNERS L P | S | ▼−15.5K sh | $25.48 | ▼−$395K | 5,792,466 |
| 2009-12-01 | MARKWEST ENERGY PARTNERS L P | S | ▼−15.5K sh | $25.71 | ▼−$399K | 5,807,966 |
| 2009-12-01 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,500 sh | $25.72 | ▼−$64.3K | 952,490 |
| 2009-11-23 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,500 sh | $24.51 | ▼−$61.3K | 954,990 |
| 2009-11-23 | MARKWEST ENERGY PARTNERS L P | S | ▼−16.5K sh | $24.51 | ▼−$404K | 5,823,466 |
| 2009-11-20 | MARKWEST ENERGY PARTNERS L P | S | ▼−2,500 sh | $24.38 | ▼−$61K | 957,490 |
| 2009-11-20 | MARKWEST ENERGY PARTNERS L P | S | ▼−17.5K sh | $24.38 | ▼−$427K | 5,839,966 |
| 2009-11-19 | MARKWEST ENERGY PARTNERS L P | S | ▼−12.2K sh | $24.46 | ▼−$298K | 5,857,466 |
| 2009-11-19 | MARKWEST ENERGY PARTNERS L P | S | ▼−1,700 sh | $24.46 | ▼−$41.6K | 959,990 |
| 2009-11-18 | MARKWEST ENERGY PARTNERS L P | S | ▼−300 sh | $25.00 | ▼−$7,500 | 961,690 |
| 2009-11-18 | MARKWEST ENERGY PARTNERS L P | S | ▼−800 sh | $25.00 | ▼−$20K | 5,869,666 |
| 2009-11-16 | MARKWEST ENERGY PARTNERS L P | S | ▼−20K sh | $23.95 | ▼−$479K | 5,870,466 |
| 2009-11-13 | MARKWEST ENERGY PARTNERS L P | S | ▼−8,000 sh | $23.83 | ▼−$191K | 961,990 |
| 2009-11-13 | MARKWEST ENERGY PARTNERS L P | S | ▼−32K sh | $23.81 | ▼−$762K | 5,890,466 |
| 2009-08-18 | MARKWEST ENERGY PARTNERS L P | S | ▼−300K sh | $20.07 | ▼−$6.02M | 5,922,466 |
| 2008-01-31 | MARKWEST ENERGY PARTNERS L P | M | −334 sh | — | — | 0 |
| 2008-01-31 | MARKWEST ENERGY PARTNERS L P | M | +334 sh | — | — | 92,462 |
| 2007-01-31 | MARKWEST ENERGY PARTNERS L P | M | −166 sh | — | — | 167 |
| 2007-01-31 | MARKWEST ENERGY PARTNERS L P | M | +166 sh | — | — | 46,064 |
| 2006-12-29 | MARKWEST ENERGY PARTNERS L P | A | +500 sh | — | — | 45,898 |
| 2006-03-30 | MARKWEST HYDROCARBON L.L.C. | P | ▲+3,507 sh | $23.00 | ▲+$80.7K | 85,155 |
| 2005-12-31 | MARKWEST HYDROCARBON L.L.C. | A | +1,000 sh | — | — | 200,214 |
| 2005-12-28 | MARKWEST HYDROCARBON L.L.C. | D | −1,000 sh | $11.05 | −$11.1K | 0 |
| 2005-12-28 | MARKWEST HYDROCARBON L.L.C. | A | +500 sh | $22.10 | +$11.1K | 199,214 |
| 2004-12-31 | MARKWEST ENERGY PARTNERS L P | A | +500 sh | — | — | 500 |
| 2004-12-31 | MARKWEST HYDROCARBON L.L.C. | A | +1,000 sh | — | — | 5,628 |
| 2004-09-22 | MARKWEST ENERGY PARTNERS L P | P | ▲+1,600 sh | $43.53 | ▲+$69.6K | 32,000 |