Table of Contents Table of Contents 2 List of Tables 4 List of Figures 6 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Year, 2010 to YTD 2016 7 MarkWest Energy Partners, L.P., Oil & Gas Deals By Type, 2010 to YTD 2016 8 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Region, 2010 to YTD 2016 9 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Sector, 2010 to YTD 2016 10 MarkWest Energy Partners, L.P., Oil & Gas, Deals Summary, 2010 to YTD 2016 11 MarkWest Energy Partners, L.P., Oil & Gas, Deal Details 14 Asset Purchase 14 MarkWest Energy Acquires Midstream Assets In Anadarko Basin From Chesapeake Energy For US$245 Million 14 Eureka hunters Sells Thomas Russell Cryogenic Natural Gas Processing Plant To MarkWest Liberty 16 MarkWest Energy Acquires Natural Gas Processing Complex From EQT For US$230 Million 17 Partnerships 19 Enterprise, Anadarko, DCP Midstream And MarkWest Form Joint Venture To Develop Panola NGL Pipeline 19 MarkWest Energy Forms Joint Venture With Energy & Minerals Group 21 MarkWest Energy And Energy & Minerals Group Partner With Gulfport Energy 22 Kinder Morgan Energy Plans To Form Joint Venture With MarkWest Utica EMG 23 Equity Offering 25 MarkWest Energy Partners Completes Public Offering Of Units For US$298.8 Million 25 MarkWest Energy Completes Public Offering Of Units For US$454.5 Million 27 MarkWest Energy Partners Completes Public Offering Of Units For US$350 Million 28 MarkWest Energy Partners Completes Public Offering Of Units For US$442 Million 30 MarkWest Energy Completes Public Offering Of Units For US$351.3 Million 32 MarkWest Energy Completes Public Offering Of Common Units For US$542.5 Million 34 MarkWest Energy Partners Completes Public Offering Of Common Units For US$261.7 Million 36 MarkWest Energy Partners Completes Public Offering Of US$193.2 Million 38 MarkWest Energy Partners Completes Public Offering Of US$142 Million 40 MarkWest Energy Partners Completes Public Offering Of US$148.7 Million 42 Debt Offering 44 MarkWest Energy Completes Public Offering Of 4.875% Senior Notes Due 2025 for US$1.2 Billion 44 MarkWest Energy Completes Public Offering Of 4.875% Senior Notes Due 2024 For US$650 Million 46 MarkWest Energy Completes Public Offering Of 4.875% Senior Notes, Due 2024, For US$500 Million 48 MarkWest Energy Completes Public Offering Of 4.5% Notes Due 2023 For US$1 Billion 50 MarkWest Energy Partners Completes Public Offering Of 5.5% Senior Notes Due 2023 For US$750 Million 52 MarkWest Energy Completes Public Offering Of 6.25% Senior Unsecured Notes Due 2022 For US$700 Million 54 MarkWest Energy Partners Completes Offering 6.5% Senior Unsecured Notes Due 2021 For US$200 Million 56 MarkWest Energy Partners Completes 6.5% Senior Unsecured Notes Offering For US$300 Million 57 MarkWest Energy Partners Completes Offering Of 6.75% Senior Notes Due 2020 For US$500 Million 58 Asset Transactions 60 Summit Midstream Completes Acquisition Of Natural Gas Gathering And Compression Assets In Marcellus Shale Play, West Virginia, From MarkWest Energy For US$210 Million 60 Acquisition 62 MPLX Completes Acquisition Of MarkWest Energy For US$20 Billion 62 Summit Midstream To Acquire 40% Stake In Ohio Gathering From MarkWest Energy And Energy & Minerals Group 64 MarkWest Liberty Midstream Completes Acquisition Of Keystone Midstream From R.E. Gas Development, Stonehenge Energy And Summit Discovery For US$512 Million 66 MarkWest Energy Partners Acquires Remaining 49% Joint Venture Stake In MarkWest Liberty Midstream & Resources From Energy & Minerals Group 68 Rex Energy Completes Sale Of 30% Interest In Keystone Midstream Services 70 MarkWest Energy Partners Sells Its 50% Interest In Stingray Pipeline 71 Enbridge Offshore Acquires 50% Interest In Starfish Pipeline 72 MarkWest Energy Partners, L.P. - Key Competitors 73 Key Employees 74 Locations And Subsidiaries 75 Head Office 75 Other Locations & Subsidiaries 75 Recent Developments 78 Drilling and Production Updates 78 Jun 11, 2015: Rex Energy Announces Initial Well Results In The Moraine East Area 78 Financial Announcements 79 Feb 03, 2016: MPLX Reports Fourth-Quarter And Full-Year 2015 Financial Results 79 Nov 04, 2015: MarkWest Energy Partners Reports Third Quarter 2015 Financial Results 82 Aug 05, 2015: MarkWest Energy Partners Reports Second Quarter 2015 Financial Results 85 May 06, 2015: MarkWest Energy Partners Reports First Quarter Financial Results 88 Feb 25, 2015: MarkWest Energy Partners Reports Record 2014 Fourth Quarter and Full-Year Financial Results 91 Jan 21, 2015: MarkWest Energy Partners Increases Quarterly Cash Distribution: Update Jan 21, 2015 95 Other Significant Developments 96 Dec 04, 2015: MPLX And MarkWest Announce Successful Completion Of Combination And Director And Executive Appointments 96 Jul 30, 2015: Rockies Express Pipeline To Soon Begin Gas Supply From Ohio To Illinois 97 May 18, 2015: MarkWest Energy Partners Announces The Appointment Of J. Mike Stice To Board Of Directors 98 May 02, 2015: MarkWest Energy Partners Announces The Retirement In 2016 Of Randy Nickerson, Chief Commercial Officer, And Other Senior Management Organizational Changes 99 New Contracts Announcements 100 Jun 02, 2015: MarkWest Energy Partners Announces New Commercial Agreements To Provide Processing Services For Cimarex And Chevron In The Permian Basin 100 May 19, 2015: Rex Energy and Stonehenge Energy Resources Announce Moraine East Gathering Agreement 101 Appendix 102 Methodology 102 About GlobalData 102 Contact Us 102 Disclaimer 102

List of Tables MarkWest Energy Partners, L.P., Oil & Gas, Key Facts, 2014 1 MarkWest Energy Partners, L.P., Oil & Gas, Deals Summary, 2010 to YTD 2016 1 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Year, 2010 to YTD 2016 7 MarkWest Energy Partners, L.P., Oil & Gas Deals By Type, 2010 to YTD 2016 8 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Region, 2010 to YTD 2016 9 MarkWest Energy Partners, L.P., Deals By Sector, 2010 to YTD 2016 10 MarkWest Energy Partners, L.P., Oil & Gas, Deals Summary, 2010 to YTD 2016 11 MarkWest Energy Acquires Midstream Assets In Anadarko Basin From Chesapeake Energy For US$245 Million 14 Eureka hunters Sells Thomas Russell Cryogenic Natural Gas Processing Plant To MarkWest Liberty 16 MarkWest Energy Acquires Natural Gas Processing Complex From EQT For US$230 Million 17 Enterprise, Anadarko, DCP Midstream And MarkWest Form Joint Venture To Develop Panola NGL Pipeline 19 MarkWest Energy Forms Joint Venture With Energy & Minerals Group 21 MarkWest Energy And Energy & Minerals Group Partner With Gulfport Energy 22 Kinder Morgan Energy Plans To Form Joint Venture With MarkWest Utica EMG 23 MarkWest Energy Partners Completes Public Offering Of Units For US$298.8 Million 25 MarkWest Energy Completes Public Offering Of Units For US$454.5 Million 27 MarkWest Energy Partners Completes Public Offering Of Units For US$350 Million 28 MarkWest Energy Partners Completes Public Offering Of Units For US$442 Million 30 MarkWest Energy Completes Public Offering Of Units For US$351.3 Million 32 MarkWest Energy Completes Public Offering Of Common Units For US$542.5 Million 34 MarkWest Energy Partners Completes Public Offering Of Common Units For US$261.7 Million 36 MarkWest Energy Partners Completes Public Offering Of US$193.2 Million 38 MarkWest Energy Partners Completes Public Offering Of US$142 Million 40 MarkWest Energy Partners Completes Public Offering Of US$148.7 Million 42 MarkWest Energy Completes Public Offering Of 4.875% Senior Notes Due 2025 for US$1.2 Billion 44 MarkWest Energy Completes Public Offering Of 4.875% Senior Notes Due 2024 For US$650 Million 46 MarkWest Energy Completes Public Offering Of 4.875% Senior Notes, Due 2024, For US$500 Million 48 MarkWest Energy Completes Public Offering Of 4.5% Notes Due 2023 For US$1 Billion 50 MarkWest Energy Partners Completes Public Offering Of 5.5% Senior Notes Due 2023 For US$750 Million 52 MarkWest Energy Completes Public Offering Of 6.25% Senior Unsecured Notes Due 2022 For US$700 Million 54 MarkWest Energy Partners Completes Offering 6.5% Senior Unsecured Notes Due 2021 For US$200 Million 56 MarkWest Energy Partners Completes 6.5% Senior Unsecured Notes Offering For US$300 Million 57 MarkWest Energy Partners Completes Offering Of 6.75% Senior Notes Due 2020 For US$500 Million 58 Summit Midstream Completes Acquisition Of Natural Gas Gathering And Compression Assets In Marcellus Shale Play, West Virginia, From MarkWest Energy For US$210 Million 60 MPLX Completes Acquisition Of MarkWest Energy For US$20 Billion 62 Summit Midstream To Acquire 40% Stake In Ohio Gathering From MarkWest Energy And Energy & Minerals Group 64 MarkWest Liberty Midstream Completes Acquisition Of Keystone Midstream From R.E. Gas Development, Stonehenge Energy And Summit Discovery For US$512 Million 66 MarkWest Energy Partners Acquires Remaining 49% Joint Venture Stake In MarkWest Liberty Midstream & Resources From Energy & Minerals Group 68 Rex Energy Completes Sale Of 30% Interest In Keystone Midstream Services 70 MarkWest Energy Partners Sells Its 50% Interest In Stingray Pipeline 71 Enbridge Offshore Acquires 50% Interest In Starfish Pipeline 72 MarkWest Energy Partners, L.P., Key Competitors 73 MarkWest Energy Partners, L.P., Key Employees 74 MarkWest Energy Partners, L.P., Other Locations 75 MarkWest Energy Partners, L.P., Subsidiaries 76 List of Figures MarkWest Energy Partners, L.P., Oil & Gas, Deals by Type, 2010 to YTD 2016 1 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Year, 2010 to YTD 2016 1 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Region, 2010 to YTD 2016 1 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Sector, 2010 to YTD 2016 1 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Year, 2010 to YTD 2016 7 MarkWest Energy Partners, L.P., Oil & Gas, Deals by Type, 2010 to YTD 2016 8 MarkWest Energy Partners, L.P., Oil & Gas, Deals By Region, 2010 to YTD 2016 9 MarkWest Energy Partners, L.P., Oil & Gas, Deals by Sector, 2010 to YTD 2016 10