SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS's Holding History (CIK: 0001083190)

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

Q3 2015
Shares 96,959 Value ($000) $13,470 Avg Close — Range —
Q2 2015
Shares 102,697 Value ($000) $14,311 Avg Close — Range —
Q1 2015
Shares 102,987 Value ($000) $14,238 Avg Close — Range —
Q4 2014
Shares 111,016 Value ($000) $15,239 Avg Close — Range —
Q3 2014
Shares 111,106 Value ($000) $15,112 Avg Close — Range —
Q2 2014
Shares 21,766 Value ($000) $2,209 Avg Close — Range —
Q1 2014
Shares 22,886 Value ($000) $2,137 Avg Close — Range —
Q4 2013
Shares 22,840 Value ($000) $2,147 Avg Close — Range —
Q3 2013
Shares 24,556 Value ($000) $2,095 Avg Close — Range —
Q2 2013
Shares 24,503 Value ($000) $1,971 Avg Close — Range —