MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

AVENIR CORP's Holding History (CIK: 0001033475)

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

Q3 2015
Shares 231,539 Value ($000) $9,935 Avg Close — Range —
Q2 2015
Shares 232,109 Value ($000) $13,086 Avg Close — Range —
Q1 2015
Shares 234,344 Value ($000) $15,490 Avg Close — Range —
Q4 2014
Shares 234,519 Value ($000) $15,757 Avg Close — Range —
Q3 2014
Shares 237,149 Value ($000) $18,218 Avg Close — Range —
Q2 2014
Shares 237,149 Value ($000) $16,975 Avg Close — Range —
Q1 2014
Shares 238,199 Value ($000) $15,559 Avg Close — Range —
Q4 2013
Shares 238,909 Value ($000) $15,799 Avg Close — Range —
Q3 2013
Shares 246,134 Value ($000) $17,778 Avg Close — Range —
Q2 2013
Shares 249,774 Value ($000) $16,697 Avg Close — Range —