SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

GREAT WEST LIFE ASSURANCE CO /CAN/'s Holding History (CIK: 0001046192)

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

Q3 2015
Shares 87,313 Value ($000) $12,158 Avg Close — Range —
Q2 2015
Shares 81,035 Value ($000) $11,273 Avg Close — Range —
Q1 2015
Shares 54,640 Value ($000) $7,538 Avg Close — Range —
Q4 2014
Shares 55,832 Value ($000) $7,648 Avg Close — Range —
Q3 2014
Shares 57,124 Value ($000) $7,790 Avg Close — Range —
Q2 2014
Shares 57,719 Value ($000) $5,840 Avg Close — Range —
Q1 2014
Shares 58,843 Value ($000) $5,467 Avg Close — Range —
Q4 2013
Shares 55,202 Value ($000) $5,217 Avg Close — Range —
Q3 2013
Shares 53,182 Value ($000) $4,525 Avg Close — Range —
Q2 2013
Shares 489 Value ($000) $39 Avg Close — Range —