MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC's Holding History (CIK: 0001629649)

Note: Option positions (PUT/CALL) are excluded.

Q3 2015
Shares 525,000 Value ($000) $22,528 Avg Close — Range —
Q2 2015
Shares 420,000 Value ($000) $23,680 Avg Close — Range —
Q1 2015
Shares 420,000 Value ($000) $27,762 Avg Close — Range —