SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

AMARILLO NATIONAL BANK's Holding History (CIK: 0001053013)

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

Q3 2014
Shares 3,476 Value ($000) $473 Avg Close — Range —
Q2 2014
Shares 3,648 Value ($000) $371 Avg Close — Range —
Q1 2014
Shares 3,648 Value ($000) $341 Avg Close — Range —
Q4 2013
Shares 3,648 Value ($000) $343 Avg Close — Range —
Q3 2013
Shares 3,146 Value ($000) $268 Avg Close — Range —
Q2 2013
Shares 3,146 Value ($000) $253 Avg Close — Range —