MDU RES GROUP INC

Ticker: MDU CUSIP: 552690109 Class: COM

RiverFront Investment Group, LLC's Holding History (CIK: 0001469751)

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

Q2 2009
Shares 106,135 Value ($000) $2,013 Avg Close — Range —
Q1 2009
Shares 77,884 Value ($000) $1,257 Avg Close — Range —
Q4 2008
Shares 54,052 Value ($000) $1,166 Avg Close — Range —