| 2015-06-30 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +1,396 sh | — | — | 6,551 |
| 2015-06-30 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +1,244 sh | — | — | 7,795 |
| 2015-05-15 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +326 sh | — | — | 5,155 |
| 2013-11-26 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,500 sh | $70.84 | ▼−$106K | 4,795 |
| 2013-02-25 | AMERICAN SCIENCE & ENGINEERING, INC. | I | −2,078 sh | $62.37 | −$130K | 0 |
| 2013-02-14 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,400 sh | $64.55 | ▼−$90.4K | 6,295 |
| 2013-02-14 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +3,000 sh | $39.06 | +$117K | 9,295 |
| 2013-02-14 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,000 sh | $63.99 | ▼−$192K | 6,295 |
| 2013-02-14 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −3,000 sh | — | — | 0 |
| 2012-11-20 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +676 sh | $51.56 | +$34.9K | 8,371 |
| 2012-11-20 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−676 sh | $61.17 | ▼−$41.4K | 7,695 |
| 2012-11-20 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −676 sh | — | — | 0 |
| 2012-05-22 | AMERICAN SCIENCE & ENGINEERING, INC. | I | +1,042 sh | $47.92 | +$49.9K | 2,034 |
| 2011-05-10 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−826 sh | $85.98 | ▼−$71K | 8,651 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +3,134 sh | $20.55 | +$64.4K | 12,611 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +312 sh | $61.45 | +$19.2K | 12,923 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +50 sh | $60.66 | +$3,033 | 12,973 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,496 sh | $89.00 | ▼−$311K | 9,477 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −50 sh | — | — | 101 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −3,134 sh | — | — | 0 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −312 sh | — | — | 623 |
| 2010-12-06 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,250 sh | $83.46 | ▼−$104K | 9,477 |
| 2010-05-27 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−2,621 sh | $71.53 | ▼−$187K | 10,727 |
| 2010-01-08 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +2,000 sh | $13.08 | +$26.2K | 14,392 |
| 2010-01-08 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−2,000 sh | $83.00 | ▼−$166K | 12,392 |
| 2010-01-08 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −2,000 sh | — | — | 7,635 |
| 2009-12-28 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +560 sh | $52.82 | +$29.6K | 12,952 |
| 2009-12-28 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−560 sh | $77.00 | ▼−$43.1K | 12,392 |
| 2009-12-28 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −560 sh | — | — | 9,635 |
| 2009-05-21 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,500 sh | $60.79 | ▼−$91.2K | 12,392 |
| 2009-05-15 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +3,698 sh | $61.40 | +$227K | 13,892 |
| 2009-05-15 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +1,010 sh | $61.40 | +$62K | 10,195 |
| 2007-09-14 | AMERICAN SECURITIES INVESTMENT CO | A | +151 sh | $60.66 | +$9,159.66 | 14,086 |
| 2007-08-13 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−434 sh | $67.22 | ▼−$29.2K | 4,162 |
| 2007-06-14 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−4,407 sh | $55.89 | ▼−$246K | 16,000 |
| 2007-06-14 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,000 sh | $55.89 | ▼−$168K | 13,000 |
| 2006-06-20 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +2,046 sh | $52.82 | +$108K | 4,596 |
| 2006-06-20 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +560 sh | — | — | 24,935 |
| 2006-03-16 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,750 sh | $87.55 | ▼−$153K | 26,625 |
| 2006-03-16 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,000 sh | $87.61 | ▼−$87.6K | 25,625 |
| 2006-03-16 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −1,000 sh | $88.23 | −$88.2K | 24,625 |
| 2006-03-16 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −250 sh | $88.23 | −$22.1K | 24,375 |