| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| ALXN | SVP & Chief Legal Officer | Aug 23, 2012 | Sale | $103.30 | 33,528 | 3,463,577 | 74,905 | Aug 27, 2012, 04:15 PM |
| ALXN | SVP & Chief Legal Officer | Jul 27, 2012 | Option Exercise | $25.08 | 171,045 | 4,289,839 | 271,626 | Jul 31, 2012, 05:17 PM |
| ALXN | SVP & Chief Legal Officer | Jul 31, 2012 | Sale | $104.94 | 680 | 71,359 | 99,233 | Jul 31, 2012, 05:17 PM |
| ALXN | SVP & Chief Legal Officer | Jul 27, 2012 | Sale | $108.06 | 171,713 | 18,554,731 | 265,358 | Jul 31, 2012, 05:17 PM |
| ALXN | SVP & Chief Legal Officer | Jun 15, 2012 | Option Exercise | $17.70 | 42,578 | 753,672 | 143,159 | Jun 19, 2012, 04:14 PM |
| ALXN | SVP & Chief Legal Officer | Jun 15, 2012 | Sale | $93.98 | 42,578 | 4,001,350 | 109,591 | Jun 19, 2012, 04:14 PM |
| ALXN | SVP and Chief Legal Officer | May 29, 2012 | Option Exercise | $13.76 | 103,400 | 1,422,879 | 203,981 | May 31, 2012, 05:25 PM |
| ALXN | SVP and Chief Legal Officer | May 29, 2012 | Sale | $92.02 | 103,400 | 9,514,485 | 100,581 | May 31, 2012, 05:25 PM |
| ALXN | SVP & Chief Legal Officer | May 10, 2012 | Option Exercise | $12.53 | 20,600 | 258,052 | 82,493 | May 14, 2012, 04:47 PM |
| ALXN | SVP & Chief Legal Officer | May 14, 2012 | Option Exercise | $8.18 | 18,088 | 147,960 | 100,581 | May 14, 2012, 04:47 PM |
| ALXN | SVP & Chief Legal Officer | Mar 14, 2012 | Option Exercise | $8.35 | 65,912 | 550,640 | 127,935 | Mar 16, 2012, 04:39 PM |
| ALXN | SVP & Chief Legal Officer | Mar 14, 2012 | Sale | $88.81 | 65,912 | 5,853,537 | 73,233 | Mar 16, 2012, 04:39 PM |
| ALXN | SVP & Chief Legal Officer | Feb 22, 2012 | Option Exercise | $5.14 | 72,000 | 369,760 | 151,894 | Feb 23, 2012, 04:39 PM |
| ALXN | SVP & Chief Legal Officer | Feb 22, 2012 | Sale | $83.47 | 89,871 | 7,501,685 | 67,023 | Feb 23, 2012, 04:39 PM |
| ALXN | SVP & Chief Legal Officer | Jan 27, 2012 | Sale | $74.41 | 663 | 49,334 | 73,896 | Jan 30, 2012, 04:23 PM |
| ALXN | SVP & Chief Legal Officer | Jan 30, 2012 | Sale | $74.51 | 2,002 | 149,169 | 71,894 | Jan 30, 2012, 04:23 PM |
| ALXN | SVP & Chief Legal Officer | Jan 10, 2012 | Sale | $75.00 | 562 | 42,150 | 74,559 | Jan 11, 2012, 05:14 PM |
| ALXN | SVP & Chief Legal Officer | Oct 24, 2011 | Option Exercise | $5.52 | 38,960 | 214,867 | 114,081 | Oct 25, 2011, 04:43 PM |
| ALXN | SVP & Chief Legal Officer | Oct 24, 2011 | Sale | $69.70 | 38,960 | 2,715,512 | 75,121 | Oct 25, 2011, 04:43 PM |
| ALXN | SVP & Chief Legal Officer | Aug 22, 2011 | Option Exercise | $5.21 | 33,528 | 174,539 | 75,121 | Aug 24, 2011, 03:48 PM |
| ALXN | SVP & Chief Legal Officer | Jul 25, 2011 | Option Exercise | $4.03 | 31,512 | 126,993 | 73,774 | Jul 27, 2011, 05:12 PM |
| ALXN | SVP & Chief Legal Officer | Jul 27, 2011 | Sale | $57.27 | 669 | 38,314 | 41,593 | Jul 27, 2011, 05:12 PM |
| ALXN | SVP & Chief Legal Officer | Jul 25, 2011 | Sale | $58.48 | 31,512 | 1,842,822 | 42,262 | Jul 27, 2011, 05:12 PM |
| ALXN | SVP & Chief Legal Officer | Jul 11, 2011 | Sale | $50.00 | 501 | 25,050 | 42,262 | Jul 12, 2011, 04:19 PM |
| ALXN | SVP & Chief Legal Officer | Mar 02, 2011 | Sale | $99.27 | 4,310 | 427,854 | 21,632 | Mar 03, 2011, 03:48 PM |
| ALXN | SVP & Chief Legal Officer | Jan 27, 2011 | Sale | $84.70 | 1,323 | 112,058 | 20,942 | Jan 28, 2011, 04:16 PM |
| ALXN | SVP & Chief Legal Officer | Jan 18, 2011 | Sale | $82.66 | 265 | 21,905 | 22,265 | Jan 18, 2011, 04:17 PM |
| ALXN | SVP & Chief Legal Officer | Jan 10, 2011 | Sale | $81.27 | 280 | 22,756 | 22,530 | Jan 12, 2011, 01:16 PM |
| ALXN | SVP & Chief Legal Officer | Nov 29, 2010 | Option Exercise | $17.69 | 50,000 | 884,500 | 72,810 | Dec 01, 2010, 04:55 PM |
| ALXN | SVP & Chief Legal Officer | Nov 29, 2010 | Sale | $75.21 | 50,000 | 3,760,292 | 28,855 | Dec 01, 2010, 04:55 PM |
| ALXN | SVP & Chief Legal Officer | Oct 26, 2010 | Option Exercise | $17.69 | 20,010 | 353,905 | 42,820 | Oct 28, 2010, 04:39 PM |
| ALXN | SVP & Chief Legal Officer | Oct 26, 2010 | Sale | $67.79 | 20,010 | 1,356,478 | 22,810 | Oct 28, 2010, 04:39 PM |
| ALXN | SVP & Chief Legal Officer | Sep 03, 2010 | Option Exercise | $17.69 | 20,000 | 353,800 | 29,934 | Sep 03, 2010, 04:53 PM |
| ALXN | SVP & Chief Legal Officer | Sep 03, 2010 | Sale | $58.14 | 20,000 | 1,162,800 | 9,934 | Sep 03, 2010, 04:53 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| ALXN | SVP & Chief Legal Officer | Aug 23, 2012 | Sale | 3,463,577 |
| ALXN | SVP & Chief Legal Officer | Jul 27, 2012 | Option Exercise | 4,289,839 |
| ALXN | SVP & Chief Legal Officer | Jul 31, 2012 | Sale | 71,359 |
| ALXN | SVP & Chief Legal Officer | Jul 27, 2012 | Sale | 18,554,731 |
| ALXN | SVP & Chief Legal Officer | Jun 15, 2012 | Option Exercise | 753,672 |
| ALXN | SVP & Chief Legal Officer | Jun 15, 2012 | Sale | 4,001,350 |
| ALXN | SVP and Chief Legal Officer | May 29, 2012 | Option Exercise | 1,422,879 |
| ALXN | SVP and Chief Legal Officer | May 29, 2012 | Sale | 9,514,485 |
| ALXN | SVP & Chief Legal Officer | May 10, 2012 | Option Exercise | 258,052 |
| ALXN | SVP & Chief Legal Officer | May 14, 2012 | Option Exercise | 147,960 |
| ALXN | SVP & Chief Legal Officer | Mar 14, 2012 | Option Exercise | 550,640 |
| ALXN | SVP & Chief Legal Officer | Mar 14, 2012 | Sale | 5,853,537 |
| ALXN | SVP & Chief Legal Officer | Feb 22, 2012 | Option Exercise | 369,760 |
| ALXN | SVP & Chief Legal Officer | Feb 22, 2012 | Sale | 7,501,685 |
| ALXN | SVP & Chief Legal Officer | Jan 27, 2012 | Sale | 49,334 |
| ALXN | SVP & Chief Legal Officer | Jan 30, 2012 | Sale | 149,169 |
| ALXN | SVP & Chief Legal Officer | Jan 10, 2012 | Sale | 42,150 |
| ALXN | SVP & Chief Legal Officer | Oct 24, 2011 | Option Exercise | 214,867 |
| ALXN | SVP & Chief Legal Officer | Oct 24, 2011 | Sale | 2,715,512 |
| ALXN | SVP & Chief Legal Officer | Aug 22, 2011 | Option Exercise | 174,539 |
| ALXN | SVP & Chief Legal Officer | Jul 25, 2011 | Option Exercise | 126,993 |
| ALXN | SVP & Chief Legal Officer | Jul 27, 2011 | Sale | 38,314 |
| ALXN | SVP & Chief Legal Officer | Jul 25, 2011 | Sale | 1,842,822 |
| ALXN | SVP & Chief Legal Officer | Jul 11, 2011 | Sale | 25,050 |
| ALXN | SVP & Chief Legal Officer | Mar 02, 2011 | Sale | 427,854 |
| ALXN | SVP & Chief Legal Officer | Jan 27, 2011 | Sale | 112,058 |
| ALXN | SVP & Chief Legal Officer | Jan 18, 2011 | Sale | 21,905 |
| ALXN | SVP & Chief Legal Officer | Jan 10, 2011 | Sale | 22,756 |
| ALXN | SVP & Chief Legal Officer | Nov 29, 2010 | Option Exercise | 884,500 |
| ALXN | SVP & Chief Legal Officer | Nov 29, 2010 | Sale | 3,760,292 |
| ALXN | SVP & Chief Legal Officer | Oct 26, 2010 | Option Exercise | 353,905 |
| ALXN | SVP & Chief Legal Officer | Oct 26, 2010 | Sale | 1,356,478 |
| ALXN | SVP & Chief Legal Officer | Sep 03, 2010 | Option Exercise | 353,800 |
| ALXN | SVP & Chief Legal Officer | Sep 03, 2010 | Sale | 1,162,800 |