AMERICAN SCIENCE & ENGR INC

CUSIP: 029429107 Class: COM

VANGUARD GROUP INC's Holding History (CIK: 0000102909)

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

Q2 2016
Shares 352,495 Value ($000) $13,186 Avg Close — Range —
Q1 2016
Shares 423,915 Value ($000) $11,738 Avg Close — Range —
Q4 2015
Shares 569,956 Value ($000) $23,585 Avg Close — Range —
Q3 2015
Shares 562,572 Value ($000) $20,005 Avg Close — Range —
Q2 2015
Shares 576,271 Value ($000) $25,247 Avg Close — Range —
Q1 2015
Shares 566,143 Value ($000) $27,663 Avg Close — Range —
Q4 2014
Shares 522,506 Value ($000) $27,119 Avg Close — Range —
Q3 2014
Shares 550,148 Value ($000) $30,467 Avg Close — Range —
Q2 2014
Shares 539,369 Value ($000) $37,535 Avg Close — Range —
Q1 2014
Shares 527,401 Value ($000) $35,425 Avg Close — Range —
Q4 2013
Shares 507,927 Value ($000) $36,526 Avg Close — Range —
Q3 2013
Shares 493,493 Value ($000) $29,762 Avg Close — Range —
Q2 2013
Shares 453,896 Value ($000) $25,418 Avg Close — Range —