SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

Northwest & Ethical Investments L.P.'s Holding History (CIK: 0002033536)

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

Q1 2013
Shares 62,230 Value ($000) $4,834 Avg Close — Range —
Q4 2012
Shares 62,230 Value ($000) $4,579 Avg Close — Range —
Q3 2012
Shares 53,380 Value ($000) $3,842 Avg Close — Range —
Q2 2012
Shares 48,340 Value ($000) $3,574 Avg Close — Range —