SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

GAMCO INVESTORS, INC. ET AL's Holding History (CIK: 0000807249)

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

Q3 2015
Shares 369,400 Value ($000) $51,317 Avg Close — Range —
Q2 2015
Shares 454,250 Value ($000) $63,300 Avg Close — Range —
Q1 2015
Shares 434,150 Value ($000) $60,021 Avg Close — Range —
Q4 2014
Shares 373,857 Value ($000) $51,319 Avg Close — Range —
Q3 2014
Shares 322,900 Value ($000) $43,918 Avg Close — Range —