Presentations & Webcasts - Pre-merger

Date Title 11/04/15   Q3 2015 MarkWest Energy Partners, L.P. Earnings Conference Call 11/04/15   MarkWest 3Q15 Conference Call Presentation 09/10/15   Barclays CEO Energy-Power Conference 08/19/15   Citi 2015 MLP/Midstream Infrastructure Conference 08/05/15   Q2 2015 MarkWest Energy Partners, L.P. Earnings Conference Call 08/05/15   MarkWest 2Q15 Conference Call Presentation 06/03/15   MarkWest Energy Partners 2015 Investor & Analyst Day 06/03/15   2015 Investor & Analyst Day 05/21/15   MarkWest Energy Partners, L.P. at NAPTP 2015 MLP Investor Conference 05/21/15   Investor Presentation – May 2015 05/21/15   NAPTP 2015 MLP Investor Conference 05/06/15   Q1 2015 MarkWest Energy Partners, L.P. Earnings Conference Call 05/06/15   MarkWest 1Q15 Conference Call Presentation 02/25/15   Q4 2014 MarkWest Energy Partners, L.P. Earnings Conference Call 02/25/15   MarkWest 4Q14 Conference Call Presentation 02/04/15   Investor Presentation – February 2015 01/29/15   Hart Energy 2015 Marcellus-Utica Midstream Conference