| 2011-05-13 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−801 sh | $88.00 | ▼−$70.5K | 3,110 |
| 2011-05-13 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −801 sh | — | — | 401 |
| 2011-05-13 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−235 sh | $88.00 | ▼−$20.7K | 3,110 |
| 2011-05-13 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +801 sh | $61.40 | +$49.2K | 3,911 |
| 2011-05-13 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −235 sh | — | — | 0 |
| 2011-05-13 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,859 sh | $88.54 | ▼−$165K | 3,110 |
| 2011-05-13 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +235 sh | $51.56 | +$12.1K | 3,345 |
| 2011-05-12 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,712 sh | $85.98 | ▼−$147K | 4,969 |
| 2011-02-16 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−725 sh | $93.13 | ▼−$67.5K | 6,681 |
| 2010-11-15 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−2,800 sh | $83.00 | ▼−$232K | 7,406 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +935 sh | $61.45 | +$57.5K | 11,701 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −469 sh | — | — | 235 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −151 sh | — | — | 0 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −935 sh | — | — | 0 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −560 sh | — | — | 0 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +469 sh | $51.56 | +$24.2K | 12,321 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +560 sh | $52.82 | +$29.6K | 10,766 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +151 sh | $60.66 | +$9,159.66 | 11,852 |
| 2010-11-12 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−2,115 sh | $82.52 | ▼−$175K | 10,206 |
| 2010-05-27 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,498 sh | $71.68 | ▼−$107K | 10,206 |
| 2010-05-12 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,200 sh | $80.00 | ▼−$96K | 11,061 |
| 2010-05-12 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,200 sh | $80.00 | ▼−$96K | 11,704 |
| 2010-02-18 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−650 sh | $76.52 | ▼−$49.7K | 12,261 |
| 2009-05-21 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−4,121 sh | $60.88 | ▼−$251K | 12,911 |
| 2009-05-15 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +1,202 sh | $61.40 | +$73.8K | 1,906 |
| 2009-05-15 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +4,400 sh | $61.40 | +$270K | 17,032 |
| 2007-09-14 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +151 sh | $60.66 | +$9,159.66 | 474 |
| 2007-08-09 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−474 sh | $64.19 | ▼−$30.4K | 2,949 |
| 2007-06-19 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,000 sh | $56.28 | ▼−$169K | 9,957 |
| 2006-06-20 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +560 sh | — | — | 21,957 |
| 2006-06-20 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +2,046 sh | $52.82 | +$108K | 3,423 |