SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

K2 PRINCIPAL FUND, L.P.'s Holding History (CIK: 0001461790)

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

Q2 2015
Shares 87,603 Value ($000) $12,207 Avg Close — Range —
Q1 2015
Shares 15,083 Value ($000) $2,085 Avg Close — Range —
Q4 2014
Shares 16,000 Value ($000) $2,196 Avg Close — Range —