Markwest Energy Partners L P

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS

Report date

3/31/2014

Quarter

2014 Q1

Filed

5/8/2014

Shares

1,018,207

Value ($000)

66,509

Weight

1.0%

2013 Q4 - 2014 Q1 (2 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2014 Q1	5/8/2014	66,509	1.0%	1,018,207	3/31/2014
2013 Q4	2/7/2014	67,787	1.1%	1,025,063	12/31/2013