SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

GATEWAY INVESTMENT ADVISERS LLC's Holding History (CIK: 0001114618)

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

Q3 2015
Shares 13,976 Value ($000) $1,942 Avg Close — Range —
Q2 2015
Shares 14,796 Value ($000) $2,062 Avg Close — Range —
Q1 2015
Shares 15,089 Value ($000) $2,086 Avg Close — Range —
Q4 2014
Shares 15,255 Value ($000) $2,094 Avg Close — Range —
Q3 2014
Shares 15,592 Value ($000) $2,121 Avg Close — Range —
Q2 2014
Shares 15,840 Value ($000) $1,607 Avg Close — Range —
Q1 2014
Shares 12,456 Value ($000) $1,163 Avg Close — Range —
Q4 2013
Shares 12,676 Value ($000) $1,192 Avg Close — Range —
Q3 2013
Shares 12,976 Value ($000) $1,107 Avg Close — Range —
Q2 2013
Shares 12,062 Value ($000) $969 Avg Close — Range —