SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AM's Holding History (CIK: 0001132716)

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

Q4 2014
Shares 703,195 Value ($000) $96,528,000 Avg Close — Range —
Q3 2014
Shares 190,000 Value ($000) $25,842,000 Avg Close — Range —