SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

Walleye Trading LLC's Holding History (CIK: 0001388391)

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

Q4 2014
Shares 57,450 Value ($000) $7,886 Avg Close — Range —
Q4 2013
Shares 1,731 Value ($000) $163 Avg Close — Range —