| 2013-02-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +2,797 sh | $53.55 | +$150K | 19,488 |
| 2013-02-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −5,860 sh | — | — | 0 |
| 2013-02-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −3,734 sh | — | — | 0 |
| 2013-02-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −2,797 sh | — | — | 0 |
| 2013-02-27 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−12.4K sh | $62.55 | ▼−$775K | 16,691 |
| 2013-02-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +5,860 sh | $51.56 | +$302K | 29,082 |
| 2013-02-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +3,734 sh | $52.82 | +$197K | 23,222 |
| 2013-01-23 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,750 sh | $69.00 | ▼−$259K | 16,691 |
| 2012-12-17 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,579 sh | $65.00 | ▼−$103K | 20,441 |
| 2012-12-14 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−2,171 sh | $65.00 | ▼−$141K | 22,020 |
| 2012-09-17 | AMERICAN SCIENCE & ENGINEERING, INC. | D | −10.7K sh | — | — | 24,191 |
| 2011-05-31 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−15.8K sh | $85.47 | ▼−$1.35M | 34,862 |
| 2011-05-12 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−12.9K sh | $86.14 | ▼−$1.11M | 50,616 |
| 2010-12-23 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,652 sh | $85.69 | ▼−$313K | 63,466 |
| 2010-12-17 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,647 sh | $84.80 | ▼−$309K | 67,118 |
| 2010-12-10 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,647 sh | $82.57 | ▼−$301K | 63,466 |
| 2010-12-03 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,647 sh | $80.67 | ▼−$294K | 74,412 |
| 2010-11-26 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,647 sh | $81.91 | ▼−$299K | 78,059 |
| 2010-11-19 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,647 sh | $81.05 | ▼−$296K | 81,706 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,647 sh | $83.36 | ▼−$304K | 85,353 |
| 2010-10-29 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,647 sh | $81.28 | ▼−$296K | 89,000 |
| 2010-05-27 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−14.6K sh | $71.27 | ▼−$1.04M | 92,166 |
| 2009-12-07 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−16.1K sh | $70.32 | ▼−$1.13M | 106,598 |
| 2009-12-07 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +16.1K sh | $39.06 | +$629K | 122,704 |
| 2009-12-07 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −16.1K sh | — | — | 30,184 |
| 2009-05-21 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−20.9K sh | $60.79 | ▼−$1.27M | 107,079 |
| 2009-05-15 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +8,746 sh | $61.40 | +$537K | 33,509 |
| 2009-05-15 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +32K sh | $61.40 | +$1.97M | 127,978 |
| 2007-09-14 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +1,258 sh | $60.66 | +$76.3K | 23,653 |
| 2007-09-14 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−5,000 sh | $63.03 | ▼−$315K | 22,395 |
| 2007-08-09 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−8,694 sh | $63.89 | ▼−$555K | 34,367 |
| 2007-06-13 | AMERICAN SCIENCE & ENGINEERING, INC. | X | +9,727 sh | $55.02 | +$535K | 24,606 |
| 2007-06-13 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−5,000 sh | $55.05 | ▼−$275K | 19,606 |
| 2006-06-20 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +3,734 sh | — | — | 50,197 |
| 2006-06-20 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +13.6K sh | $52.82 | +$720K | 42,781 |
| 2004-12-02 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +28K sh | $39.06 | +$1.09M | 28,000 |
| 2003-09-25 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +75K sh | — | — | 75,000 |