SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

WELCH & FORBES LLC's Holding History (CIK: 0000105495)

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

Q3 2015
Shares 18,993 Value ($000) $2,639 Avg Close — Range —
Q2 2015
Shares 18,968 Value ($000) $2,644 Avg Close — Range —
Q1 2015
Shares 18,518 Value ($000) $2,560 Avg Close — Range —
Q4 2014
Shares 18,943 Value ($000) $2,600 Avg Close — Range —
Q3 2014
Shares 18,768 Value ($000) $2,553 Avg Close — Range —
Q2 2014
Shares 17,559 Value ($000) $1,782 Avg Close — Range —
Q1 2014
Shares 17,581 Value ($000) $1,642 Avg Close — Range —
Q4 2013
Shares 17,581 Value ($000) $1,653 Avg Close — Range —
Q3 2013
Shares 17,931 Value ($000) $1,529 Avg Close — Range —
Q2 2013
Shares 18,077 Value ($000) $1,454 Avg Close — Range —