David W. Keiser serves as Executive at ALEXION PHARMACEUTICALS INC, where they oversee executive responsibilities. Since joining the company, David W. Keiser has executed 148 insider transactions totaling $20.9M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jun 1, 2009 involved exercising options for 4,810 shares valued at $99.0K.
David W. Keiser currently holds 166,796 shares of ALEXION PHARMACEUTICALS INC (ALXN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, David W. Keiser has been a net seller of ALXN stock. They have purchased $0 and sold $20.9M worth of shares.
David W. Keiser's most recent insider trade was on Jun 1, 2009, when they sold 4,810 shares at $20.58 per share.
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| 2,440 |
| $20.58 |
| Discretionary |
| Jun 1, 2009 | ALXN | $364.5K | Option Exercise | 17,500 | $20.83 | Discretionary |
| Jun 1, 2009 | ALXN | $491.8K | Option Exercise | 15,250 | $32.25 | Discretionary |
| Jun 1, 2009 | ALXN | $1.4M | Sale | 38,200 | $36.59 | Discretionary |
| Jun 1, 2009 | ALXN | $67.0K | Sale | 1,800 | $37.25 | Discretionary |
| Jun 1, 2009 | ALXN | $366.3K | Sale | 10,000 | $36.63 | Discretionary |
| May 11, 2009 | ALXN | $273.1K | Sale | 7,800 | $35.01 | Discretionary |
| May 7, 2009 | ALXN | $77.0K | Sale | 2,200 | $35.00 | Discretionary |
| May 1, 2009 | ALXN | $1.2M | Sale | 38,100 | $32.77 | Discretionary |
| May 1, 2009 | ALXN | $269.8K | Option Exercise | 16,500 | $16.35 | Discretionary |
| May 1, 2009 | ALXN | $313.8K | Option Exercise | 15,250 | $20.58 | Discretionary |
| May 1, 2009 | ALXN | $63.5K | Sale | 1,900 | $33.40 | Discretionary |
| May 1, 2009 | ALXN | $96.5K | Option Exercise | 7,000 | $13.79 | Discretionary |
| May 1, 2009 | ALXN | $12.9K | Option Exercise | 1,250 | $10.36 | Discretionary |
| Apr 1, 2009 | ALXN | $96.5K | Option Exercise | 7,000 | $13.79 | Discretionary |
| Apr 1, 2009 | ALXN | $113.6K | Option Exercise | 10,822 | $10.50 | Discretionary |
| Apr 1, 2009 | ALXN | $12.4K | Option Exercise | 1,178 | $10.50 | Discretionary |
| Apr 1, 2009 | ALXN | $233.5K | Sale | 6,500 | $35.92 | Discretionary |
| Apr 1, 2009 | ALXN | $86.0K | Sale | 2,337 | $36.78 | Discretionary |
| Apr 1, 2009 | ALXN | $187.2K | Sale | 5,200 | $36.00 | Discretionary |
| Apr 1, 2009 | ALXN | $25.0K | Sale | 696 | $35.95 | Discretionary |
| Apr 1, 2009 | ALXN | $588.2K | Sale | 16,000 | $36.76 | Discretionary |
| Apr 1, 2009 | ALXN | $862.1K | Sale | 24,000 | $35.92 | Discretionary |
| Apr 1, 2009 | ALXN | $128.7K | Sale | 3,500 | $36.78 | Discretionary |
| Apr 1, 2009 | ALXN | $67.1K | Option Exercise | 5,760 | $11.65 | Discretionary |
| Apr 1, 2009 | ALXN | $165.9K | Option Exercise | 14,240 | $11.65 | Discretionary |
| Apr 1, 2009 | ALXN | $10.2K | Option Exercise | 1,000 | $10.19 | Discretionary |
| Mar 16, 2009 | ALXN | $112.4K | Sale | 3,281 | $34.25 | Discretionary |
| Mar 13, 2009 | ALXN | $350.1K | Sale | 10,000 | $35.01 | Discretionary |