Insider Trading activities of Markwest Energy Partners L P insiders.

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Markwest Energy Partners L P since 2005 are illustrated in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Markwest Energy Partners L P since year 2005. Table 2 shows the detailed insider transactions of Markwest Energy Partners L P since 2005. The reporting company's ticker symbol is MWE. The reporting company's CIK number is 1166036.
The total value of stock buying since 2005 is $3,504,262.
The total value of stock sales since 2005 is $48,765,128.
The total value of stock option exercises since 2005 is $151,250.


Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Markwest Energy Partners L P (MWE).
Trading Period Insider Buying Insider Sales Option Exercises
year-month Shares Value Shares Value Shares Value
2015-07 0 $0 1,122 $76,520 0 $0
2015-06 0 $0 1,122 $72,043 0 $0
2015-05 0 $0 1,122 $74,719 0 $0
2015-04 0 $0 1,122 $72,930 0 $0
2015-03 0 $0 13,432 $853,152 0 $0
2015-01 0 $0 1,700 $114,172 0 $0
2014-12 0 $0 1,700 $119,146 0 $0
2014-11 0 $0 1,700 $117,328 0 $0
2014-10 0 $0 1,700 $130,048 0 $0
2014-09 0 $0 1,700 $135,088 0 $0
2014-08 0 $0 1,700 $116,297 0 $0
2014-07 0 $0 11,700 $839,484 0 $0
2014-06 0 $0 4,900 $317,000 0 $0
2014-05 3,850 $248,871 0 $0 0 $0
2014-04 0 $0 9,700 $628,795 0 $0
2014-03 0 $0 4,051 $258,925 0 $0
2014-02 0 $0 1,500 $105,390 0 $0
2014-01 0 $0 1,500 $99,399 0 $0
2013-12 0 $0 1,500 $103,096 0 $0
2013-11 0 $0 1,500 $111,630 0 $0
2013-10 0 $0 6,500 $473,405 0 $0
2013-09 0 $0 16,500 $1,158,265 0 $0
2013-08 0 $0 1,500 $106,080 0 $0
2013-07 0 $0 1,500 $100,455 0 $0
2013-06 0 $0 1,500 $98,464 0 $0
2013-05 0 $0 13,900 $940,437 0 $0
2013-04 0 $0 23,400 $1,436,567 0 $0
2013-02 0 $0 35,405 $2,011,154 0 $0
2013-01 0 $0 20,000 $1,047,470 0 $0
2012-12 0 $0 15,000 $766,410 0 $0
2012-11 6,200 $300,729 10,000 $520,130 0 $0
2012-10 0 $0 22,500 $1,231,280 0 $0
2012-09 0 $0 10,000 $536,470 0 $0
2012-08 0 $0 2,500 $132,500 0 $0
2012-05 0 $0 4,100 $246,799 0 $0
2012-04 0 $0 9,100 $540,183 0 $0
2012-03 0 $0 4,000 $240,680 0 $0
2012-02 0 $0 20,000 $1,167,570 0 $0
2012-01 0 $0 450 $25,353 0 $0
2011-12 0 $0 450 $24,052 0 $0
2011-11 0 $0 450 $22,981 0 $0
2011-10 0 $0 3,350 $165,911 0 $0
2011-09 0 $0 450 $21,622 0 $0
2011-08 5,000 $216,130 450 $21,100 0 $0
2011-07 0 $0 12,699 $623,834 0 $0
2011-06 3,165 $149,957 5,599 $264,849 0 $0
2011-05 3,360 $150,441 5,599 $286,176 0 $0
2011-04 0 $0 5,599 $271,775 0 $0
2011-03 0 $0 20,000 $906,915 0 $0
2011-02 244 $10,381 0 $0 0 $0
2011-01 0 $0 7,500 $320,812 0 $0
2010-12 0 $0 7,500 $310,417 0 $0
2010-11 0 $0 7,500 $316,987 0 $0
2010-10 0 $0 17,500 $641,802 0 $0
2010-09 0 $0 12,500 $436,640 0 $0
2010-08 1,500 $51,210 7,500 $258,217 0 $0
2010-07 0 $0 5,000 $170,000 0 $0
2010-06 0 $0 5,000 $155,105 0 $0
2010-05 0 $0 17,000 $512,168 0 $0
2010-04 0 $0 5,000 $153,430 0 $0
2010-03 500 $15,475 0 $0 0 $0
2010-02 0 $0 15,000 $432,850 0 $0
2010-01 0 $0 210,000 $6,274,161 0 $0
2009-12 0 $0 131,000 $3,327,340 0 $0
2009-11 2,817 $68,391 129,000 $3,112,784 0 $0
2009-08 19 $399 600,000 $12,039,600 0 $0
2009-05 3,024 $50,165 0 $0 0 $0
2009-03 1,000 $9,440 0 $0 0 $0
2009-02 32 $362 0 $0 0 $0
2008-12 15,340 $136,795 0 $0 0 $0
2008-11 50,623 $606,103 0 $0 0 $0
2008-09 27,200 $704,561 0 $0 0 $0
2008-08 9,010 $296,323 0 $0 0 $0
2008-05 8 $289 0 $0 0 $0
2008-03 3,000 $101,460 0 $0 0 $0
2008-01 0 $0 0 $0 8,536 $0
2007-01 0 $0 0 $0 4,772 $0
2006-11 0 $0 7,500 $420,220 0 $0
2006-09 0 $0 0 $0 1,250 $60,500
2006-08 0 $0 0 $0 1,875 $90,750
2006-06 2,400 $99,768 0 $0 0 $0
2006-05 3,300 $150,008 0 $0 0 $0
2006-03 3,000 $137,004 714 $31,912 0 $0
2006-01 0 $0 0 $0 5,218 $0
2005-12 0 $0 1,707 $80,928 0 $0
2005-11 0 $0 713 $35,706 0 $0

Table 2. Detailed insider stock purchases, sales, and option exercises of Markwest Energy Partners L P insiders (MWE)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2015-07-13 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,122 68.20 76,520
2015-06-01 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,122 64.21 72,043
2015-05-08 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,122 66.60 74,719
2015-04-09 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,122 65.00 72,930
2015-03-30 Buese Nancy (EVP, Chief Financial Officer) Sale 10,000 63.00 630,000
2015-03-02 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 3,432 65.02 223,152
2015-01-02 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,700 67.16 114,172
2014-12-01 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,700 70.09 119,146
2014-11-03 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,700 69.02 117,328
2014-10-01 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,700 76.50 130,048
2014-09-02 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,700 79.46 135,088
2014-08-01 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,700 68.41 116,297
2014-07-28 Buese Nancy (EVP, Chief Financial Officer) Sale 10,000 71.79 717,900
2014-07-01 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,700 71.52 121,584
2014-06-06 Rosson Paula L (SVP/Chief Accounting Officer) Sale 1,500 64.00 96,000
2014-06-06 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 3,400 65.00 221,000
2014-05-12 Bailey Keith E Buy 3,850 64.64 248,871
2014-04-30 Bromley C Corwin (EVP, General Counsel) Sale 1,500 63.16 94,735
2014-04-23 Rosson Paula L (SVP/Chief Accounting Officer) Sale 1,500 65.04 97,560
2014-04-22 Bromley C Corwin (EVP, General Counsel) Sale 1,000 66.00 66,000
2014-04-21 Bromley C Corwin (EVP, General Counsel) Sale 4,000 65.00 260,000
2014-04-14 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,700 65.00 110,500
2014-03-27 Nicoletti William P Sale 2,821 64.32 181,435
2014-03-03 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,230 63.00 77,490
2014-02-03 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,500 70.26 105,390
2014-01-02 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,500 66.27 99,399
2013-12-02 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,500 68.73 103,096
2013-11-01 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,500 74.42 111,630
2013-10-01 Bromley C Corwin (EVP, General Counsel) Sale 5,000 73.02 365,075
2013-10-01 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,500 72.22 108,330
2013-09-30 Buese Nancy (EVP, Chief Financial Officer) Sale 5,000 72.00 360,000
2013-09-19 Buese Nancy (EVP, Chief Financial Officer) Sale 5,000 70.00 350,000
2013-09-12 Buese Nancy (EVP, Chief Financial Officer) Sale 5,000 69.52 347,600
2013-09-03 Nickerson Randy S (EVP, Chief Commercial Officer) Sale 1,500 67.11 100,665
2013-08-01 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 1,500 70.72 106,080
2013-07-01 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 1,500 66.97 100,455
2013-06-03 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 1,500 65.64 98,464
2013-05-22 Rosson Paula L (VP/Chief Accounting Officer) Sale 1,900 69.12 131,328
2013-05-22 Bromley C Corwin (SVP, General Counsel) Sale 2,500 70.02 175,045
2013-05-20 Bromley C Corwin (SVP, General Counsel) Sale 2,500 68.01 170,025
2013-05-15 Wolf Donald D Sale 3,000 67.14 201,432
2013-05-14 Bromley C Corwin (SVP, General Counsel) Sale 2,500 67.15 167,885
2013-05-01 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 1,500 63.15 94,722
2013-04-30 Bromley C Corwin (SVP, General Counsel) Sale 2,500 63.03 157,567
2013-04-29 Bromley C Corwin (SVP, General Counsel) Sale 7,500 61.60 462,007
2013-04-24 Rosson Paula L (VP/Chief Accounting Officer) Sale 1,900 63.25 120,175
2013-04-23 Buese Nancy (SVP, Chief Financial Officer) Sale 5,000 62.00 310,000
2013-04-08 Buese Nancy (SVP, Chief Financial Officer) Sale 5,000 60.00 300,000
2013-04-05 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 1,500 57.88 86,818
2013-02-15 Mollenkopf John C (SVP, Chief Operating Officer) Sale 10,000 58.08 580,770
2013-02-14 Bromley C Corwin (SVP, General Counsel) Sale 2,500 58.00 145,000
2013-02-13 Bromley C Corwin (SVP, General Counsel) Sale 2,500 57.00 142,500
2013-02-11 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 20,405 56.01 1,142,884
2013-01-15 Mollenkopf John C (SVP, Chief Operating Officer) Sale 10,000 52.75 527,470
2013-01-02 Mollenkopf John C (SVP, Chief Operating Officer) Sale 10,000 52.00 520,000
2012-12-10 Buese Nancy (SVP, Chief Financial Officer) Sale 15,000 51.09 766,410
2012-11-30 Mollenkopf John C (SVP, Chief Operating Officer) Sale 10,000 52.01 520,130
2012-11-19 Wolf Donald D Buy 1,000 49.32 49,325
2012-11-16 Bailey Keith E Buy 5,200 48.35 251,404
2012-10-15 Mollenkopf John C (SVP, Chief Operating Officer) Sale 10,000 54.95 549,510
2012-10-02 Bromley C Corwin (SVP, General Counsel) Sale 2,500 55.00 137,500
2012-10-01 Mollenkopf John C (SVP, Chief Operating Officer) Sale 10,000 54.43 544,270
2012-09-10 Mollenkopf John C (SVP, Chief Operating Officer) Sale 10,000 53.65 536,470
2012-08-10 Bromley C Corwin (SVP, General Counsel) Sale 2,500 53.00 132,500
2012-05-01 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 4,100 60.20 246,799
2012-04-23 Bromley C Corwin (SVP, General Counsel) Sale 5,000 60.01 300,055
2012-04-04 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 4,100 58.57 240,128
2012-03-22 Rosson Paula L (VP/Chief Accounting Officer) Sale 4,000 60.17 240,680
2012-02-06 Buese Nancy (SVP, Chief Financial Officer) Sale 10,000 58.33 583,260
2012-02-06 Bromley C Corwin (SVP, General Counsel) Sale 10,000 58.43 584,310
2012-01-17 Rosson Paula L (VP/Chief Accounting Officer) Sale 450 56.34 25,353
2011-12-15 Rosson Paula L (VP/Chief Accounting Officer) Sale 450 53.45 24,052
2011-11-15 Rosson Paula L (VP/Chief Accounting Officer) Sale 450 51.07 22,981
2011-10-28 Buese Nancy (SVP, Chief Financial Officer) Sale 2,900 50.00 145,000
2011-10-17 Rosson Paula L (VP/Chief Accounting Officer) Sale 450 46.47 20,911
2011-09-15 Rosson Paula L (VP/Chief Accounting Officer) Sale 450 48.05 21,622
2011-08-22 Bailey Keith E Buy 5,000 43.23 216,130
2011-08-15 Rosson Paula L (VP/Chief Accounting Officer) Sale 450 46.89 21,100
2011-07-07 Buese Nancy (SVP, Chief Financial Officer) Sale 7,100 50.01 355,049
2011-07-01 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 5,599 48.01 268,785
2011-06-01 Beatty Michael L Buy 3,165 47.38 149,957
2011-06-01 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 5,599 47.30 264,849
2011-05-17 Semple Frank M (Chairman, President & CEO) Buy 1,160 43.18 50,088
2011-05-13 Bailey Keith E Buy 2,200 45.62 100,353
2011-05-02 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 5,599 51.11 286,176
2011-04-04 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 5,599 48.54 271,775
2011-03-21 Bromley C Corwin (SVP, General Counsel) Sale 5,000 45.51 227,565
2011-03-18 Bromley C Corwin (SVP, General Counsel) Sale 5,000 44.73 223,660
2011-03-08 Buese Nancy (SVP, Chief Financial Officer) Sale 10,000 45.57 455,690
2011-02-09 Nicoletti William P Buy 244 42.55 10,381
2011-01-18 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 7,500 42.78 320,812
2010-12-20 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 7,500 41.39 310,417
2010-11-22 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 7,500 42.26 316,987
2010-10-18 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 7,500 36.90 276,757
2010-10-01 Bromley C Corwin (SVP, General Counsel) Sale 7,500 36.50 272,545
2010-09-30 Bromley C Corwin (SVP, General Counsel) Sale 5,000 35.65 178,265
2010-09-20 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 7,500 34.45 258,375
2010-08-27 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 7,500 34.43 258,217
2010-08-13 Bailey Keith E Buy 1,500 34.14 51,210
2010-07-09 Bromley C Corwin (SVP, General Counsel) Sale 5,000 34.00 170,000
2010-06-17 Bromley C Corwin (SVP, General Counsel) Sale 5,000 31.02 155,105
2010-05-17 Buese Nancy (SVP, Chief Financial Officer) Sale 12,000 30.03 360,348
2010-05-17 Bromley C Corwin (SVP, General Counsel) Sale 5,000 30.36 151,820
2010-04-01 Buese Nancy (SVP, Chief Financial Officer) Sale 5,000 30.69 153,430
2010-03-19 Heppermann Donald C Buy 500 30.95 15,475
2010-02-16 Bromley C Corwin (SVP, General Counsel) Sale 10,000 28.61 286,100
2010-02-01 Buese Nancy (SVP, Chief Financial Officer) Sale 5,000 29.35 146,750
2010-01-26 Fox John M Sale 22,500 29.74 669,262
2010-01-25 Fox John M Sale 15,000 29.78 446,700
2010-01-21 Fox John M Sale 15,000 29.59 443,850
2010-01-19 Fox John M Sale 22,500 29.98 674,437
2010-01-14 Fox John M Sale 15,000 29.06 435,975
2010-01-11 Fox John M Sale 22,500 30.11 677,475
2010-01-04 Fox John M Sale 97,500 30.02 2,926,462
2009-12-08 Fox John M Sale 18,000 25.20 453,600
2009-12-07 Fox John M Sale 18,000 25.30 455,400
2009-12-04 Fox John M Sale 19,000 24.97 474,430
2009-12-03 Fox John M Sale 20,000 25.50 510,000
2009-12-02 Schroeder Andrew L (VP Finance) Sale 7,500 25.57 191,775
2009-12-02 Fox John M Sale 18,000 25.48 458,640
2009-12-01 Buese Nancy (SVP, Chief Financial Officer) Sale 5,000 25.71 128,550
2009-12-01 Schroeder Andrew L (VP Finance) Sale 7,500 25.61 192,075
2009-12-01 Fox John M Sale 18,000 25.72 462,870
2009-11-23 Fox John M Sale 19,000 24.51 465,690
2009-11-20 Fox John M Sale 20,000 24.38 487,600
2009-11-19 Fox John M Sale 13,900 24.46 339,994
2009-11-18 Fox John M Sale 1,100 25.00 27,500
2009-11-17 Beatty Michael L Buy 1,800 24.42 43,956
2009-11-17 Heppermann Donald C Buy 1,000 24.03 24,030
2009-11-16 Buese Nancy (SVP, Chief Financial Officer) Sale 5,000 23.98 119,900
2009-11-16 Bromley C Corwin (SVP, General Counsel) Sale 10,000 24.03 240,300
2009-11-16 Beatty Michael L Buy 17 23.87 405
2009-11-16 Fox John M Sale 20,000 23.95 479,000
2009-11-13 Fox John M Sale 40,000 23.82 952,800
2009-08-18 Mwhc Holding Inc (10% Owner) Sale 300,000 20.07 6,019,800
2009-08-18 Fox John M Sale 300,000 20.07 6,019,800
2009-08-17 Beatty Michael L Buy 19 21.03 399
2009-05-27 Bailey Keith E Buy 3,000 16.59 49,782
2009-05-18 Beatty Michael L Buy 24 15.96 383
2009-03-06 Teets Bryan (VP Compliance & Internal Audit) Buy 1,000 9.44 9,440
2009-02-17 Beatty Michael L Buy 32 11.33 362
2008-12-23 Schroeder Andrew L (VP Finance & Treasurer) Buy 2,000 7.15 14,292
2008-12-22 Bailey Keith E Buy 3,890 7.61 29,618
2008-12-19 Dempster Charles Buy 2,820 8.97 25,286
2008-12-18 Dempster Charles Buy 1,070 9.38 10,031
2008-12-17 Dempster Charles Buy 1,010 9.93 10,029
2008-12-17 Nicoletti William P Buy 2,000 9.93 19,856
2008-12-16 Dempster Charles Buy 960 10.41 9,993
2008-12-15 Dempster Charles Buy 940 10.66 10,020
2008-12-11 Dempster Charles Buy 650 11.80 7,670
2008-11-21 Fox John M Buy 7,000 10.25 71,750
2008-11-20 Fox Mounsey Anne E Buy 10,000 10.75 107,500
2008-11-19 Fox Mounsey Anne E Buy 30,000 12.53 375,870
2008-11-17 Beatty Michael L Buy 23 14.89 342
2008-11-14 Bailey Keith E Buy 3,600 14.07 50,641
2008-09-18 Fox John M Buy 9,000 22.59 203,301
2008-09-17 Fox John M Buy 6,000 25.60 153,576
2008-09-16 Bailey Keith E Buy 7,200 26.92 193,824
2008-09-09 Semple Frank M (President, CEO) Buy 5,000 30.77 153,860
2008-08-22 Wolf Donald D Buy 4,000 33.37 133,492
2008-08-18 Beatty Michael L Buy 10 33.13 331
2008-08-15 Wolf Donald D Buy 5,000 32.50 162,500
2008-05-16 Beatty Michael L Buy 8 36.14 289
2008-03-07 Wolf Donald D Buy 3,000 33.82 101,460
2008-01-31 Bromley C Corwin (SVP, General Counsel) Option Ex 732 .00 0
2008-01-31 Schroeder Andrew L (VP Finance & Treasurer) Option Ex 614 .00 0
2008-01-31 Semple Frank M (President, CEO) Option Ex 2,214 .00 0
2008-01-31 Dempster Charles Option Ex 334 .00 0
2008-01-31 Nicoletti William P Option Ex 334 .00 0
2008-01-31 Kellstrom William A Option Ex 334 .00 0
2008-01-31 Mollenkopf John C (SVP, Chief Opns Officer) Option Ex 1,320 .00 0
2008-01-31 Nickerson Randy S (SVP, Chief Commercial Officer) Option Ex 1,986 .00 0
2008-01-31 Heppermann Donald C Option Ex 334 .00 0
2008-01-31 Fox John M Option Ex 334 .00 0
2007-01-31 Bromley C Corwin (SVP, General Counsel) Option Ex 365 .00 0
2007-01-31 Young David Lee (SVP, Corporate Svcs) Option Ex 135 .00 0
2007-01-31 Schroeder Andrew L (VP Finance & Treasurer) Option Ex 307 .00 0
2007-01-31 Semple Frank M (President, CEO) Option Ex 1,107 .00 0
2007-01-31 Dempster Charles Option Ex 291 .00 0
2007-01-31 Nicoletti William P Option Ex 291 .00 0
2007-01-31 Kellstrom William A Option Ex 291 .00 0
2007-01-31 Mollenkopf John C (SVP, Chief Opns Officer) Option Ex 660 .00 0
2007-01-31 Nickerson Randy S (SVP, Chief Commercial Officer) Option Ex 993 .00 0
2007-01-31 Heppermann Donald C Option Ex 166 .00 0
2007-01-31 Fox John M Option Ex 166 .00 0
2006-11-16 Young David Lee (SVP, Corporate Svcs) Sale 500 55.27 27,635
2006-11-14 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 3,900 56.35 219,765
2006-11-13 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 1,100 55.90 61,220
2006-11-10 Nickerson Randy S (SVP, Chief Commercial Officer) Sale 1,000 56.00 56,000
2006-09-28 Ivey James G (Chief Financial Officer) Option Ex 1,250 48.40 60,500
2006-08-30 Semple Frank M (President, CEO) Option Ex 1,875 48.40 90,750
2006-06-30 Bailey Keith E Buy 2,400 41.57 99,768
2006-05-08 Bailey Keith E Buy 3,300 45.46 150,008
2006-03-31 Dempster Charles Sale 500 44.58 22,290
2006-03-30 Young David Lee (SVP, Corporate Svcs) Sale 91 44.78 4,074
2006-03-24 Marle Kimberly H (VP - NGL Marketing) Sale 123 45.11 5,548
2006-03-17 Bailey Keith E Buy 3,000 45.67 137,004
2006-01-31 Bromley C Corwin (General Counsel) Option Ex 367 .00 0
2006-01-31 Ivey James G (Chief Financial Officer) Option Ex 590 .00 0
2006-01-31 Young David Lee (Sr. VP NE Business U) Option Ex 136 .00 0
2006-01-31 Smith Ted S (Chief Accounting Officer) Option Ex 220 .00 0
2006-01-31 Schroeder Andrew L (VP of Finance) Option Ex 307 .00 0
2006-01-31 Semple Frank M (President, CEO) Option Ex 1,109 .00 0
2006-01-31 Dempster Charles Option Ex 167 .00 0
2006-01-31 Nicoletti William P Option Ex 167 .00 0
2006-01-31 Kellstrom William A Option Ex 167 .00 0
2006-01-31 Mollenkopf John C (SVP) Option Ex 660 .00 0
2006-01-31 Nickerson Randy S (SVP) Option Ex 994 .00 0
2006-01-31 Heppermann Donald C Option Ex 167 .00 0
2006-01-31 Fox John M Option Ex 167 .00 0
2005-12-06 Young David Lee (Sr. VP NE Business U) Sale 1,024 47.41 48,547
2005-11-22 Ivey James G (Chief Financial Officer) Sale 396 48.56 19,229
2005-11-22 Young David Lee (Sr. VP NE Business U) Sale 317 51.98 16,477

Insider trading activities including stock purchases, stock sales, and option exercises of MWE listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Markwest Energy Partners L P (symbol MWE, CIK number 1166036) see the Securities and Exchange Commission (SEC) website.