AMERICAN SCIENCE & ENGR INC

CUSIP: 029429107 Class: COM

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q2 2016
Shares 14,972 Value ($000) $560 Avg Close — Range —
Q1 2016
Shares 15,657 Value ($000) $434 Avg Close — Range —
Q4 2015
Shares 13,640 Value ($000) $564 Avg Close — Range —
Q3 2015
Shares 13,492 Value ($000) $480 Avg Close — Range —
Q2 2015
Shares 13,492 Value ($000) $591 Avg Close — Range —
Q1 2015
Shares 13,484 Value ($000) $659 Avg Close — Range —
Q4 2014
Shares 14,584 Value ($000) $757 Avg Close — Range —
Q3 2014
Shares 14,522 Value ($000) $804 Avg Close — Range —
Q2 2014
Shares 14,340 Value ($000) $998 Avg Close — Range —
Q1 2014
Shares 14,840 Value ($000) $997 Avg Close — Range —
Q4 2013
Shares 14,740 Value ($000) $1,060 Avg Close — Range —
Q3 2013
Shares 14,640 Value ($000) $883 Avg Close — Range —
Q2 2013
Shares 14,212 Value ($000) $796 Avg Close — Range —
Q1 2013
Shares 14,624 Value ($000) $892 Avg Close — Range —