MEDCO HEALTH SOLUTIONS

CUSIP: 58405U102 Class: COMMON STOCK

BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp's Holding History (CIK: 0001228242)

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

Q1 2012
Shares 307,004 Value ($000) $21,582 Avg Close — Range —
Q4 2011
Shares 285,349 Value ($000) $15,951 Avg Close — Range —
Q3 2011
Shares 225,824 Value ($000) $10,589 Avg Close — Range —