SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q2 2015
Shares 1,234 Value ($000) $172 Avg Close — Range —
Q1 2015
Shares 1,019 Value ($000) $141 Avg Close — Range —
Q4 2014
Shares 3 Value ($000) $0 Avg Close — Range —
Q3 2014
Shares 1,415 Value ($000) $192 Avg Close — Range —
Q1 2014
Shares 545 Value ($000) $51 Avg Close — Range —
Q4 2013
Shares 946 Value ($000) $89 Avg Close — Range —
Q3 2013
Shares 2,057 Value ($000) $175 Avg Close — Range —
Q2 2013
Shares 897 Value ($000) $72 Avg Close — Range —