SIMPLEX TRADING, LLC - MARKWEST ENERGY PARTNERS L P ownership

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MARKWEST ENERGY PARTNERS L P's ticker is and the CUSIP is 570759950.

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Quarter-by-quarter ownership
SIMPLEX TRADING, LLC ownership history of MARKWEST ENERGY PARTNERS L P
ValueSharesWeighting
Q3 2015$26,000
-43.5%
26
-77.0%
0.00%
-50.0%
Q2 2015$46,000
+253.8%
113
+56.9%
0.00%
+100.0%
Q1 2015$13,000
-38.1%
72
+132.3%
0.00%
-33.3%
Q4 2014$21,000–31–0.00%–
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Other shareholders
MARKWEST ENERGY PARTNERS L P shareholders Q4 2015
NameSharesValueWeighting ↓
PEAK6 Group LLC 125,300$9,626,0000.07%
GROUP ONE TRADING, L.P. 12,100$930,0000.01%
Citadel Advisors 22,700$1,744,0000.00%
SG Americas Securities, LLC 60,000$162,0000.00%
View complete list of MARKWEST ENERGY PARTNERS L P shareholders