SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

Conestoga Capital Advisors, LLC's Holding History (CIK: 0001163744)

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

Q2 2014
Shares 2,215 Value ($000) $225 Avg Close — Range —
Q1 2014
Shares 2,290 Value ($000) $214 Avg Close — Range —
Q4 2013
Shares 2,290 Value ($000) $215 Avg Close — Range —
Q2 2013
Shares 2,590 Value ($000) $208 Avg Close — Range —