SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

PDT Partners, LLC's Holding History (CIK: 0001564702)

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

Q2 2014
Shares 40,850 Value ($000) $4,145 Avg Close — Range —
Q1 2014
Shares 33,486 Value ($000) $3,127 Avg Close — Range —
Q4 2013
Shares 10,292 Value ($000) $968 Avg Close — Range —