SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

Aurora Investment Counsel's Holding History (CIK: 0001316397)

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

Q4 2013
Shares 3,050 Value ($000) $287 Avg Close — Range —
Q3 2013
Shares 13,104 Value ($000) $1,118 Avg Close — Range —
Q2 2013
Shares 13,093 Value ($000) $1,064 Avg Close — Range —