P Stephen Squinto

Insider Trading: Sales

Symbol	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
ALXN	$92.17	3,085	$284,344.45	108,462	2013-03-08	Filing
ALXN	$91.21	16,915	$1,542,817.15	111,547	2013-03-08	Filing
ALXN	$96.49	52	$5,017.48	81,925	2013-02-04	Filing
ALXN	$95.66	2,520	$241,063.20	81,977	2013-02-04	Filing
ALXN	$94.32	767	$72,343.44	84,497	2013-01-29	Filing
ALXN	$94.50	715	$67,567.50	85,264	2013-01-28	Filing
ALXN	$105.01	1,015	$106,585.15	85,979	2012-07-31	Filing
ALXN	$106.14	668	$70,901.52	86,994	2012-07-27	Filing
ALXN	$108.88	16,300	$1,774,744.00	87,662	2012-07-27	Filing
ALXN	$107.75	38,951	$4,196,970.25	103,962	2012-07-27	Filing
ALXN	$106.93	19,069	$2,039,048.17	142,913	2012-07-27	Filing
ALXN	$105.86	25,680	$2,718,484.80	161,982	2012-07-27	Filing
ALXN	$101.81	1,200	$122,172.00	87,662	2012-07-09	Filing
ALXN	$100.98	4,700	$474,606.00	88,862	2012-07-09	Filing
ALXN	$100.34	44,100	$4,424,994.00	93,562	2012-07-09	Filing
ALXN	$90.00	50,000	$4,500,000.00	87,662	2012-06-06	Filing
ALXN	$82.03	6,779	$556,081.37	87,662	2012-02-17	Filing
ALXN	$81.27	48,481	$3,939,856.95	94,441	2012-02-17	Filing
ALXN	$74.51	3,004	$223,828.04	74,662	2012-01-30	Filing
ALXN	$74.41	663	$49,333.83	77,626	2012-01-27	Filing