AMERICAN SCIENCE & ENGR INC

CUSIP: 029429107 Class: COM

Swiss National Bank's Holding History (CIK: 0001582202)

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

Q1 2016
Shares 11,100 Value ($000) $296 Avg Close — Range —
Q4 2015
Shares 8,900 Value ($000) $368 Avg Close — Range —
Q3 2015
Shares 8,900 Value ($000) $316 Avg Close — Range —
Q2 2015
Shares 7,700 Value ($000) $337 Avg Close — Range —
Q1 2015
Shares 7,700 Value ($000) $376 Avg Close — Range —
Q4 2014
Shares 7,700 Value ($000) $400 Avg Close — Range —
Q3 2014
Shares 7,700 Value ($000) $426 Avg Close — Range —
Q2 2014
Shares 7,700 Value ($000) $536 Avg Close — Range —
Q1 2014
Shares 7,700 Value ($000) $517 Avg Close — Range —
Q4 2013
Shares 6,000 Value ($000) $431 Avg Close — Range —
Q3 2013
Shares 6,000 Value ($000) $362 Avg Close — Range —
Q2 2013
Shares 6,600 Value ($000) $370 Avg Close — Range —