| 2009-05-04 | NightHawk Radiology Holdings Inc | A | −34.7K sh | — | — | 39,320 |
| 2009-05-04 | NightHawk Radiology Holdings Inc | A | +34.7K sh | — | — | 3,673,962 |
| 2008-11-17 | NightHawk Radiology Holdings Inc | M | +43.6K sh | — | — | 2,634,642 |
| 2008-11-17 | NightHawk Radiology Holdings Inc | M | −43.6K sh | — | — | 4,598 |
| 2008-11-17 | NightHawk Radiology Holdings Inc | M | +43.6K sh | — | — | 2,634,642 |
| 2008-11-17 | NightHawk Radiology Holdings Inc | M | −43.6K sh | — | — | 4,598 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−5,000 sh | $18.00 | ▼−$90K | 3,048,409 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−2,200 sh | $17.87 | ▼−$39.3K | 3,046,209 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−2,000 sh | $17.86 | ▼−$35.7K | 3,044,209 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−6,000 sh | $17.85 | ▼−$107K | 3,038,209 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−1,800 sh | $17.83 | ▼−$32.1K | 3,036,409 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−9,800 sh | $17.80 | ▼−$174K | 3,026,609 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−800 sh | $17.79 | ▼−$14.2K | 3,025,809 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−200 sh | $17.78 | ▼−$3,556 | 3,025,609 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−1,600 sh | $17.77 | ▼−$28.4K | 3,024,009 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−100 sh | $17.76 | ▼−$1,776 | 3,023,909 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−6,591 sh | $17.75 | ▼−$117K | 3,017,318 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−1,800 sh | $17.73 | ▼−$31.9K | 3,015,518 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−3,095 sh | $17.72 | ▼−$54.8K | 3,012,423 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−11.8K sh | $17.70 | ▼−$209K | 3,000,609 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−300 sh | $17.66 | ▼−$5,298 | 3,000,309 |
| 2007-06-22 | NightHawk Radiology Holdings Inc | S | ▼−6,900 sh | $17.65 | ▼−$122K | 2,993,409 |
| 2007-06-11 | NightHawk Radiology Holdings Inc | S | ▼−900 sh | $17.71 | ▼−$15.9K | 3,070,509 |
| 2007-06-11 | NightHawk Radiology Holdings Inc | S | ▼−1,800 sh | $17.70 | ▼−$31.9K | 3,068,709 |
| 2007-06-11 | NightHawk Radiology Holdings Inc | S | ▼−1,700 sh | $17.68 | ▼−$30.1K | 3,067,009 |
| 2007-06-11 | NightHawk Radiology Holdings Inc | S | ▼−3,600 sh | $17.65 | ▼−$63.5K | 3,063,409 |
| 2007-06-11 | NightHawk Radiology Holdings Inc | S | ▼−2,800 sh | $17.64 | ▼−$49.4K | 3,060,609 |
| 2007-06-11 | NightHawk Radiology Holdings Inc | S | ▼−3,600 sh | $17.63 | ▼−$63.5K | 3,057,009 |
| 2007-06-11 | NightHawk Radiology Holdings Inc | S | ▼−3,600 sh | $17.60 | ▼−$63.4K | 3,053,409 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−1,265 sh | $17.95 | ▼−$22.7K | 4,112,144 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−2,000 sh | $17.93 | ▼−$35.9K | 4,110,144 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−100 sh | $17.92 | ▼−$1,792 | 4,110,044 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−2,401 sh | $17.90 | ▼−$43K | 4,107,643 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−400 sh | $17.86 | ▼−$7,144 | 4,107,243 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−3,834 sh | $17.80 | ▼−$68.2K | 4,103,409 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−6,000 sh | $17.76 | ▼−$107K | 4,097,409 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−12K sh | $17.68 | ▼−$212K | 4,085,409 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−4,000 sh | $17.63 | ▼−$70.5K | 4,081,409 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−1,189 sh | $17.61 | ▼−$20.9K | 4,080,220 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−3,811 sh | $17.60 | ▼−$67.1K | 4,076,409 |
| 2007-06-08 | NightHawk Radiology Holdings Inc | S | ▼−5,000 sh | $17.58 | ▼−$87.9K | 4,071,409 |
| 2007-05-08 | NightHawk Radiology Holdings Inc | S | ▼−2,000 sh | $17.70 | ▼−$35.4K | 4,231,409 |
| 2007-05-08 | NightHawk Radiology Holdings Inc | S | ▼−2,000 sh | $17.67 | ▼−$35.3K | 4,229,409 |
| 2007-05-08 | NightHawk Radiology Holdings Inc | S | ▼−1,333 sh | $17.66 | ▼−$23.5K | 4,228,076 |
| 2007-05-08 | NightHawk Radiology Holdings Inc | S | ▼−3,667 sh | $17.65 | ▼−$64.7K | 4,224,409 |
| 2007-05-08 | NightHawk Radiology Holdings Inc | S | ▼−10.2K sh | $17.63 | ▼−$180K | 4,214,209 |
| 2007-05-08 | NightHawk Radiology Holdings Inc | S | ▼−12K sh | $17.62 | ▼−$211K | 4,202,209 |
| 2007-05-08 | NightHawk Radiology Holdings Inc | S | ▼−5,700 sh | $17.61 | ▼−$100K | 4,196,509 |
| 2007-05-08 | NightHawk Radiology Holdings Inc | S | ▼−16.1K sh | $17.60 | ▼−$283K | 4,180,409 |
| 2007-05-08 | NightHawk Radiology Holdings Inc | S | ▼−2,000 sh | $17.54 | ▼−$35.1K | 4,178,409 |