O'Neill Julie Form 4 ALEXION PHARMACEUTICALS / Julie O'Neill ownership change

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

O'Neill Julie

(Last) (First) (Middle)

C/O ALEXION PHARMACEUTICALS, INC.

100 COLLEGE STREET

(Street)

NEW HAVEN CT 06510

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ALEXION PHARMACEUTICALS INC [ ALXN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
EVP. Global Operations

3. Date of Earliest Transaction (Month/Day/Year)
02/04/2016

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $.0001 per share	02/04/2016		A		11,763(1)	A	$0	33,206	D
Common Stock, par value $.0001 per share	02/05/2016		S		348(2)	D	$145.55(3)	32,858	D
Common Stock, par value $.0001 per share	02/05/2016		S		352(2)	D	$144.53(4)	32,506	D
Common Stock, par value $.0001 per share	02/05/2016		S		351(2)	D	$143.46(5)	32,155	D
Common Stock, par value $.0001 per share	02/05/2016		S		499(2)	D	$142.33(6)	31,656	D
Common Stock, par value $.0001 per share	02/05/2016		S		530(2)	D	$141.54(7)	31,126	D
Common Stock, par value $.0001 per share	02/08/2016		S		23(2)	D	$139.75(8)	31,103	D
Common Stock, par value $.0001 per share	02/08/2016		S		755(2)	D	$138.02(9)	30,348	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. On February 4, 2016, the Leadership and Compensation Committee determined that the reporting person earned 11,763 Performance Share Units upon achievement of certain performance targets previously established by the Committee. 1/3 of such shares vested on February 4, 2016 and 1/3 vest on each subsequent anniversary.

2. This sale was made to cover withholding taxes immediately following the vesting of previously granted Performance Stock Units.

3. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $145.00 - $145.99. 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.

4. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $144.00 - $144.99. 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.

5. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $143.00 - $143.99. 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.

6. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $142.00 - $142.99. 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.

7. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $141.00 - $141.99. 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.

8. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $139.00 - $139.99. 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.

9. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $138.00 - $138.99. 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.

Remarks:

	/s/ Michael Greco, Attorney-in-Fact for Julie O'Neill	02/08/2016
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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