SpiderRock Trading LLC - MARKWEST ENERGY PART ownership

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MARKWEST ENERGY PART's ticker is and the CUSIP is 57075910.

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Quarter-by-quarter ownership

SpiderRock Trading LLC ownership history of MARKWEST ENERGY PART
	Value		Shares		Weighting
Q4 2014	$90,000	+60.7%	2,241	-30.9%	0.25%	+29.0%
Q3 2014	$56,000	–	3,241	+1520.5%	0.19%	–
Q1 2014	$0	-100.0%	200	+2757.1%	0.00%	-100.0%
Q3 2013	$1,000	-97.8%	7	-99.5%	0.01%	-98.3%
Q2 2013	$46,000	–	1,462	–	0.36%	–
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Other shareholders

MARKWEST ENERGY PART shareholders Q1 2015
Name	Shares	Value	Weighting ↓
Capital Innovations LLC	12,565	$8,991,000	7.43%

View complete list of MARKWEST ENERGY PART shareholders