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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
899866	Alexion Pharmaceuticals Inc	ALXN	Pharmaceutical Preparations (2834)	133648318

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1231954	P Stephen Squinto	C/O Alexion Pharmaceuticals Inc 352 Knotter Drive Cheshire CT 06410	Evp, Chief Global Ops. Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock, Par Value .0001 Per Share	Acquisiton	2013-10-28	32,437	$78.88	137,623	No	4	M	Direct
Common Stock, Par Value .0001 Per Share	Acquisiton	2013-10-28	7,600	$93.83	145,223	No	4	M	Direct
Common Stock, Par Value .0001 Per Share	Disposition	2013-10-28	39,537	$124.06	105,686	No	4	S	Direct
Common Stock, Par Value .0001 Per Share	Disposition	2013-10-28	500	$124.76	105,186	No	4	S	Direct
Common Stock, Par Value $.0001 Per Share	Disposition	2013-10-28	1,000	$123.89	104,186	No	4	S	Indirect	By family trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Indirect	By family trust

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock, Par Value $.0001 Per Share	Option to Purchase Common Stock	Disposition	2013-10-28	32,437	$78.88	32,437	$78.88
Common Stock	Option to Purchase Common Stock	Disposition	2013-10-28	7,600	$93.83	7,600	$93.83

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
32,437	2012-05-03	2022-02-03	No	4	M	Direct
7,600	2013-05-06	2023-02-06	No	4	M	Direct

Footnotes

This transaction was executed in multiple trades through a broker-dealer at prices ranging from $123.75 - $124.75. The price reported in this column reflects the weighted average sales price. Upon request, the reporting person will provide to the SEC staff full information regarding the number of shares sold at each price.
This transaction was executed in multiple trades through a broker-dealer at prices ranging from $124.75 - $125.75. The price reported in this column reflects the weighted average sales price. Upon request, the reporting person will provide to the SEC staff full information regarding the number of shares sold at each price.
Represents shares of common stock held by a trust for the benefit of the Reporting Person's child who is currently sharing the Reporting Person's household.