EXPRESS SCRIPTS INC

CUSIP: 302182100 Class: COM

RATIONAL ADVISORS LLC's Holding History (CIK: 0001143565)

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

Q1 2012
Shares 7,239 Value ($000) $392 Avg Close — Range —
Q2 2011
Shares 2,800 Value ($000) $151 Avg Close — Range —
Q1 2011
Shares 2,800 Value ($000) $156 Avg Close — Range —
Q1 2010
Shares 25,560 Value ($000) $2,601 Avg Close — Range —
Q4 2009
Shares 25,560 Value ($000) $2,209 Avg Close — Range —
Q3 2009
Shares 25,560 Value ($000) $1,983 Avg Close — Range —
Q2 2009
Shares 25,560 Value ($000) $1,757 Avg Close — Range —
Q1 2009
Shares 27,020 Value ($000) $1,248 Avg Close — Range —