| 2015-03-31 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +1,148 sh | — | — | 15,796 |
| 2015-03-31 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +1,784 sh | — | — | 14,648 |
| 2014-02-14 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−8,629 sh | $65.02 | ▼−$561K | 13,314 |
| 2014-02-14 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −8,629 sh | — | — | 0 |
| 2014-02-14 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +8,629 sh | $39.06 | +$337K | 21,943 |
| 2013-11-20 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−2,684 sh | $68.80 | ▼−$185K | 13,314 |
| 2012-05-17 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +2,871 sh | $39.06 | +$112K | 15,998 |
| 2012-05-17 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −2,871 sh | — | — | 0 |
| 2011-05-12 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−1,750 sh | $85.99 | ▼−$150K | 13,127 |
| 2011-02-28 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −5,000 sh | — | — | 0 |
| 2011-02-28 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−5,000 sh | $94.75 | ▼−$474K | 14,877 |
| 2011-02-28 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +5,000 sh | $15.65 | +$78.3K | 19,877 |
| 2011-02-25 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +2,000 sh | $39.06 | +$78.1K | 16,877 |
| 2011-02-25 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −2,000 sh | — | — | 8,629 |
| 2011-02-25 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−2,000 sh | $94.02 | ▼−$188K | 14,877 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +5,000 sh | $15.65 | +$78.3K | 19,877 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −5,000 sh | — | — | 5,000 |
| 2011-01-27 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−5,000 sh | $89.75 | ▼−$449K | 14,877 |
| 2010-10-29 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−2,000 sh | $83.00 | ▼−$166K | 14,877 |
| 2010-10-13 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +630 sh | $52.82 | +$33.3K | 17,075 |
| 2010-10-13 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −630 sh | — | — | 25,339 |
| 2010-10-13 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−630 sh | $78.00 | ▼−$49.1K | 16,877 |
| 2009-12-30 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −6,000 sh | — | — | 25,969 |
| 2009-12-30 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +6,000 sh | $11.35 | +$68.1K | 22,445 |
| 2009-12-30 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−6,000 sh | $79.80 | ▼−$479K | 16,445 |
| 2009-11-06 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−5,000 sh | $74.75 | ▼−$374K | 16,445 |
| 2009-11-06 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +5,000 sh | $11.35 | +$56.8K | 21,445 |
| 2009-11-06 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −5,000 sh | — | — | 31,969 |
| 2009-10-01 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−5,000 sh | $69.75 | ▼−$349K | 16,445 |
| 2009-10-01 | AMERICAN SCIENCE & ENGINEERING, INC. | M | −5,000 sh | — | — | 36,969 |
| 2009-10-01 | AMERICAN SCIENCE & ENGINEERING, INC. | M | +5,000 sh | $11.35 | +$56.8K | 21,445 |
| 2009-06-01 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−3,649 sh | $63.52 | ▼−$232K | 16,445 |
| 2009-05-21 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−668 sh | $61.22 | ▼−$40.9K | 20,094 |
| 2009-05-15 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +4,340 sh | $61.40 | +$266K | 20,762 |
| 2009-05-15 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +1,186 sh | $61.40 | +$72.8K | 41,969 |
| 2007-09-14 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +173 sh | $60.66 | +$10.5K | 36,249 |
| 2006-06-20 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +630 sh | — | — | 40,611 |
| 2006-06-20 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +2,301 sh | $52.82 | +$122K | 12,397 |
| 2006-03-16 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−2,000 sh | $88.95 | ▼−$178K | 6,428 |
| 2005-12-14 | AMERICAN SCIENCE & ENGINEERING, INC. | C | +2,000 sh | $64.37 | +$129K | 34,000 |
| 2005-08-30 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−5,000 sh | $60.96 | ▼−$305K | 36,000 |
| 2005-08-18 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−5,000 sh | $56.95 | ▼−$285K | 41,000 |
| 2005-02-09 | AMERICAN SCIENCE & ENGINEERING, INC. | S | ▼−5,000 sh | $46.75 | ▼−$234K | 24,000 |
| 2004-12-02 | AMERICAN SCIENCE & ENGINEERING, INC. | A | +13.5K sh | $39.06 | +$527K | 13,500 |