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Last Activity: 2009-07-02

Country: United States

Industry: Medical-Biomedical/Gene

Transactions: Currently showing holdings/transactions Filed between 2009-04-03 and 2009-07-02

Prices: Currenty using base stock prices on Filing Date compared to stock prices on 2009-07-02

Hypotheticals

Hypotheticals use the owners holdings and changes reported as a model portfolio combining with stock price changes between the base price date and end price date. All results/returns are hypothetical and are not actual results!

Contact Information

352 Knotter Drive,Cheshire, Ct 06410,,United States Phone: 203-272-2596 Fax: 203-271-8198 Website: HTTP://WWW.ALEXIONPHARM.COM

ISIN International Securities Identification Number

US0153511094

CUSIP Committee on Uniform Securities Identification Procedures

015351109

Stock Symbols and Exchanges
Exchange Symbol	Reuters	Bloomberg	Exchange Name	MICR	ACCR	City	Country	Website
alxn	alxn	alxn:us	Nasdaq	xnas	nasdaq	New York	United States	WWW.NASDAQ.COM

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Owners Summary
Owners:	519	Owners Buying:	262	Buying Pct.:	50.48 %	Owners Netrual:	38	Neutral Pct.:	7.32 %	Owners Selling:	211	Selling Pct.:	40.65 %
Score:	3.10	Brand New:	103	Increase Existing:	159	No Change:	38	Sold Some:	137	Dumped All:	74	No Comparison:	8

Owners Reporting Options
Use 'As-Of/On' instead of 'Filed' for dates:		Begin date:		End date:
A begin price of 1900-01-01 will use the date filed for begin price:		Begin Price date:		End Price date:
- report date span limited to 100 days, all dates in format of yyyy-mm-dd, all fields required!

Show/Hide Columns
Filed	As Of/On	Form	Name
Fundclass	Shares	Activity	Shares Change
Shares Change Pct.	Hypothetical Old Value	Hypothetical New Value	Hypothetical Value Change
Hypothetical Return	Hypothetical Results	Director	Ten Pct
Other	Officer	Officer Title	History

Holdings/Transactions

Filed	As-Of/On	Form	Fullname	Fund Class	Shares	Activity	Shares Change	Shares Pct. Change	Hypothetical Old Value	Hypothetical New Value	Hypothetical Value Chg.	Hypotheticals Return	Hypotheticals Results	Director	Other	Ten Pct	Officer	Officer Title	History
2009-07-02	2009-04-30	N-CSRS	Dws Balanced Fund-Dws Balanced Fund	Flexible Portfolio	17,100	Added More	6,600	62.85 %	$668,268	$668,268	$0	0.00 %	$0						History of Dws Balanced Fund-Dws Balanced Fund Ownership Of Alexion Pharmaceuticals Inc
2009-07-02	2009-04-30	N-CSRS	Old Westbury Funds Inc-International Fund	International Multi-Cap Core		Sold All	-2,800	-100 %				0.00 %	$0						History of Old Westbury Funds Inc-International Fund Ownership Of Alexion Pharmaceuticals Inc
2009-07-02	2009-04-30	N-CSRS	Riversource International Managers Series Inc-Riversource International Aggressive Growth Fund	International Multi-Cap Growth	22,000	Added More	6,000	37.50 %	$859,760	$859,760	$0	0.00 %	$0						History of Riversource International Managers Series Inc-Riversource International Aggressive Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-07-02	2009-03-31	13F-HR/A	Managed Account Advisors Llc	Institution		Sold All	-9,148	-100 %				0.00 %	$0						History of Managed Account Advisors Llc Ownership Of Alexion Pharmaceuticals Inc
2009-07-01	2009-04-30	N-CSRS	Managers Trust I-Managers Fremont Global Fund	Global Flex Port	1,600	New Holding	1,600	100 %	$63,312	$62,528	$-784	-1.23 %	$-784						History of Managers Trust I-Managers Fremont Global Fund Ownership Of Alexion Pharmaceuticals Inc
2009-07-01	2009-04-30	N-CSR	Mtb Group Of Funds-Mtb Small Cap Growth Fund	Small-Cap Growth	32,266	Added More	12,766	65.46 %	$1,276,766	$1,260,955	$-15,810	-1.23 %	$-6,255						History of Mtb Group Of Funds-Mtb Small Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-07-01	2009-04-30	N-CSRS	Nationwide Mutual Funds-Nationwide Small Cap Index Fund	Small-Cap Core		Sold All	-27,938	-100 %				-1.23 %	$13,690						History of Nationwide Mutual Funds-Nationwide Small Cap Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-07-01	2009-04-30	N-CSRS	Russell Investment Co-Emerging Markets Fund	Emerging Markets		Sold All	-3,600	-100 %				-1.23 %	$1,764						History of Russell Investment Co-Emerging Markets Fund Ownership Of Alexion Pharmaceuticals Inc
2009-07-01	2009-04-30	N-CSRS	Russell Investment Co-International Fund	International Multi-Cap Core	13,700	Added More	3,600	35.64 %	$542,109	$535,396	$-6,713	-1.23 %	$-1,764						History of Russell Investment Co-International Fund Ownership Of Alexion Pharmaceuticals Inc
2009-07-01	2009-04-30	N-CSRS	Vanguard Explorer Fund-Vanguard Explorer Fund	Small-Cap Growth	455,917	New Holding	455,917	100 %	$18,040,636	$17,817,236	$-223,399	-1.23 %	$-223,399						History of Vanguard Explorer Fund-Vanguard Explorer Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-30	2008-09-30	13F-HR/A	Russell Frank Co	Institution	512,762	Added More	312,848	156.49 %	$21,079,646	$20,038,739	$-1,040,907	-4.93 %	$-635,081						History of Russell Frank Co Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Advisors Inner Circle Fund Ii-Growth Fund	Small-Cap Growth	39,620	Added More	5,510	16.15 %	$1,585,592	$1,548,350	$-37,243	-2.34 %	$-5,179						History of Advisors Inner Circle Fund Ii-Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Fidelity Advisor Series Vii-Fidelity Advisor Biotechnology Fund	Health/Biotech	64,738	Sold Some	-64,738	-50.00 %	$2,590,815	$2,529,961	$-60,854	-2.34 %	$60,854						History of Fidelity Advisor Series Vii-Fidelity Advisor Biotechnology Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Fidelity Advisor Series Vii-Fidelity Advisor Health Care Fund	Health/Biotech	54,612	Sold Some	-7,388	-11.91 %	$2,185,572	$2,134,237	$-51,335	-2.34 %	$6,945						History of Fidelity Advisor Series Vii-Fidelity Advisor Health Care Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Fidelity Devonshire Trust-Fidelity Mid Cap Growth Fund	Mid-Cap Growth		Sold All	-39,000	-100 %				-2.34 %	$36,660						History of Fidelity Devonshire Trust-Fidelity Mid Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Fidelity Puritan Trust-Fidelity Balanced Fund	Flexible Portfolio		Sold All	-542,600	-100 %				-2.34 %	$510,044						History of Fidelity Puritan Trust-Fidelity Balanced Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Fidelity Securities Fund-Otc Portfolio	Multi-Cap Growth	360,960	No Change	0	0 %	$14,445,619	$14,106,317	$-339,302	-2.34 %	$0						History of Fidelity Securities Fund-Otc Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-CSRS	Harbor Funds-Harbor Mid Cap Growth Fund	Mid-Cap Growth		Sold All	-52,100	-100 %				-2.34 %	$48,974						History of Harbor Funds-Harbor Mid Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-CSRS	Harbor Funds-Harbor Small Cap Growth Fund	Small-Cap Growth	283,880	Sold Some	-6,700	-2.30 %	$11,360,878	$11,094,030	$-266,847	-2.34 %	$6,298						History of Harbor Funds-Harbor Small Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-CSRS	Harbor Funds-Harbor Small Company Growth Fund	Small-Cap Growth	11,890	Added More	676	6.02 %	$475,838	$464,661	$-11,177	-2.34 %	$-635						History of Harbor Funds-Harbor Small Company Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Lord Abbett Developing Growth Fund Inc New-Lord Abbett Developing Growth Fund Inc New	Small-Cap Growth	244,534	New Holding	244,534	100 %	$9,786,251	$9,556,389	$-229,862	-2.34 %	$-229,862						History of Lord Abbett Developing Growth Fund Inc New-Lord Abbett Developing Growth Fund Inc New Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Lord Abbett Large Cap Growth Fund-Lord Abbett Large Cap Growth Fund	Large-Cap Growth	51,412	New Holding	51,412	100 %	$2,057,508	$2,009,181	$-48,327	-2.34 %	$-48,327						History of Lord Abbett Large Cap Growth Fund-Lord Abbett Large Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Northern Lights Fund Trust-Biondo Fund	Health/Biotech	150	New Holding	150	100 %	$6,003	$5,862	$-141	-2.34 %	$-141						History of Northern Lights Fund Trust-Biondo Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Northern Lights Fund Trust-Palantir Fund	Specialty & Misc	14,000	New Holding	14,000	100 %	$560,280	$547,120	$-13,160	-2.34 %	$-13,160						History of Northern Lights Fund Trust-Palantir Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Profunds-Bull Profund	Large-Cap Core	3,948	Added More	2,884	271.05 %	$157,999	$154,288	$-3,711	-2.34 %	$-2,711						History of Profunds-Bull Profund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Profunds-Health Care Ultrasector Profund	Health/Biotech	170	Sold Some	-65	-27.65 %	$6,803	$6,644	$-160	-2.34 %	$61						History of Profunds-Health Care Ultrasector Profund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Profunds-Technology Ultrasector Profund	Science & Tech		Sold All	-6,815	-100 %				-2.34 %	$6,406						History of Profunds-Technology Ultrasector Profund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Usaa Mutual Funds Trust-Growth Fund	Multi-Cap Growth	1,300	New Holding	1,300	100 %	$52,026	$50,804	$-1,222	-2.34 %	$-1,222						History of Usaa Mutual Funds Trust-Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-29	2009-04-30	N-Q	Usaa Mutual Funds Trust-Small Cap Stock Fund	Small-Cap Core	12,828	Sold Some	-12,332	-49.01 %	$513,377	$501,318	$-12,058	-2.34 %	$11,592						History of Usaa Mutual Funds Trust-Small Cap Stock Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-26	2009-04-30	N-CSRS	Janus Investment Fund-Janus Global Life Sciences Fund	Health/Biotech	390,331	Added More	60,269	18.25 %	$15,211,199	$15,254,135	$42,936	0.28 %	$6,630						History of Janus Investment Fund-Janus Global Life Sciences Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-26	2009-04-30	N-CSRS	Janus Investment Fund-Janus Global Technology Fund	Science & Tech	47,745	Added More	13,110	37.85 %	$1,860,623	$1,865,875	$5,252	0.28 %	$1,442						History of Janus Investment Fund-Janus Global Technology Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-26	2009-04-30	N-Q	Old Mutual Advisor Funds-Old Mutual Copper Rock Emerging Growth Fund	Small-Cap Growth	8,812	Sold Some	-17,088	-65.97 %	$343,404	$344,373	$969	0.28 %	$-1,880						History of Old Mutual Advisor Funds-Old Mutual Copper Rock Emerging Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-26	2009-04-30	N-Q	Putnam Vista Fundnew-Putnam Vista Fundnew	Mid-Cap Growth	13,959	New Holding	13,959	100 %	$543,982	$545,518	$1,535	0.28 %	$1,535						History of Putnam Vista Fundnew-Putnam Vista Fundnew Ownership Of Alexion Pharmaceuticals Inc
2009-06-26	2009-04-30	N-Q	Unamerica Series Trust-Balanced Portfolio	Flexible Portfolio	470	New Holding	470	100 %	$18,316	$18,368	$52	0.28 %	$52						History of Unamerica Series Trust-Balanced Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-26	2009-04-30	N-Q	Unamerica Series Trust-Growth Opportunities Portfolio	Multi-Cap Growth	20,700	No Compare			$806,679	$808,956	$2,277	0.28 %							History of Unamerica Series Trust-Growth Opportunities Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-26	2008-09-30	13F-HR/A	Legal And General Group Plc	Institution		Sold All	-400	-100 %				0.28 %	$-44						History of Legal And General Group Plc Ownership Of Alexion Pharmaceuticals Inc
2009-06-26	2008-06-30	13F-HR/A	Legal And General Group Plc	Institution	400	New Holding	400	100 %	$15,588	$15,632	$44	0.28 %	$44						History of Legal And General Group Plc Ownership Of Alexion Pharmaceuticals Inc
2009-06-25	2009-04-30	N-Q	Morgan Stanley Health Sciences Trust-None	Specialty & Misc	7,739	New Holding	7,739	100 %	$317,531	$302,440	$-15,091	-4.75 %	$-15,091						History of Morgan Stanley Health Sciences Trust-None Ownership Of Alexion Pharmaceuticals Inc
2009-06-24	2009-04-30	N-Q	Alliancebernstein Cap Fund Inc-Alliancebernstein Small Cap Growth Portfolio	Small-Cap Growth	95,700	Sold Some	-3,700	-3.72 %	$3,725,601	$3,739,956	$14,355	0.38 %	$-555						History of Alliancebernstein Cap Fund Inc-Alliancebernstein Small Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-24	2009-04-30	N-Q	Alliancebernstein Mid Cap Growth Fund Inc-Alliancebernstein Mid Cap Growth Fund Inc	Mid-Cap Growth	136,300	Sold Some	-23,400	-14.65 %	$5,306,159	$5,326,604	$20,445	0.38 %	$-3,510						History of Alliancebernstein Mid Cap Growth Fund Inc-Alliancebernstein Mid Cap Growth Fund Inc Ownership Of Alexion Pharmaceuticals Inc
2009-06-24	2009-04-30	N-Q	Alliancebernstein Portfolios-Alliancebernstein Growth Fund	Multi-Cap Growth		Sold All	-212,500	-100 %				0.38 %	$-31,875						History of Alliancebernstein Portfolios-Alliancebernstein Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-23	2009-06-19	4	Hallal David	No Data	19,121	Sold Some	-789	-3.96 %	$717,802	$747,249	$29,446	4.10 %	$-1,215		X			Sr Vp Comm Ops Americas	History of Hallal David Ownership Of Alexion Pharmaceuticals Inc
2009-06-23	2009-04-30	N-CSRS	Oppenheimer Emerging Growth Fund-Oppenheimer Emerging Growth Fund	Small-Cap Growth	42,990	New Holding	42,990	100 %	$1,613,845	$1,680,049	$66,205	4.10 %	$66,205						History of Oppenheimer Emerging Growth Fund-Oppenheimer Emerging Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-23	2009-03-31	13F-HR/A	Ing Groep Nv	Institution	115,400	Added More	8,500	7.95 %	$4,332,116	$4,509,832	$177,716	4.10 %	$13,090						History of Ing Groep Nv Ownership Of Alexion Pharmaceuticals Inc
2009-06-19	2009-06-19	4	Norby R Dougla	Insider	31,089	Added More	20,000	-224.44 %	$1,197,237	$1,214,958	$17,721	1.48 %	$11,400	X					History of Norby R Dougla Ownership Of Alexion Pharmaceuticals Inc
2009-06-19	2009-06-19	4	Norby R Dougla	Insider	11,089	Sold Some	-20,000	-64.33 %	$427,037	$433,358	$6,321	1.48 %	$-11,400	X					History of Norby R Dougla Ownership Of Alexion Pharmaceuticals Inc
2009-06-19	2009-04-30	N-CSRS	Oppenheimer Midcap Fund-Oppenheimer Midcap Fund	Mid-Cap Core	213,000	New Holding	213,000	100 %	$8,202,630	$8,324,040	$121,410	1.48 %	$121,410						History of Oppenheimer Midcap Fund-Oppenheimer Midcap Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-12	2009-06-11	4	Hallal David	No Data	19,910	Sold Some	-3,590	-15.27 %	$782,264	$778,083	$-4,181	-0.53 %	$754		X			Sr Vp Comm Ops Americas	History of Hallal David Ownership Of Alexion Pharmaceuticals Inc
2009-06-10	2009-03-31	N-CSR	Ti Classic Funds-Small Cap Growth Stock Fund	Small-Cap Growth	132,048	Sold Some	-17,790	-11.87 %	$4,928,031	$5,160,436	$232,404	4.71 %	$-31,310						History of Ti Classic Funds-Small Cap Growth Stock Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-10	2009-03-31	N-CSR	Value Line Asset Allocation Fund Inc-Value Line Asset Allocation Fund Inc	Mixed-Asset Target Allocation Growth	9,000	No Change	0	0 %	$335,880	$351,720	$15,840	4.71 %	$0						History of Value Line Asset Allocation Fund Inc-Value Line Asset Allocation Fund Inc Ownership Of Alexion Pharmaceuticals Inc
2009-06-10	2009-03-31	N-CSR	Value Line Emerging Opportunities Fund Inc-Value Line Emerging Opportunities Fund Inc	Small-Cap Growth	118,000	No Change	0	0 %	$4,403,760	$4,611,440	$207,680	4.71 %	$0						History of Value Line Emerging Opportunities Fund Inc-Value Line Emerging Opportunities Fund Inc Ownership Of Alexion Pharmaceuticals Inc
2009-06-10	2009-03-31	N-CSR	Wisdomtree Trust-Wisdomtree Diefa Fund	Specialty & Misc	103	Added More	12	13.18 %	$3,844	$4,025	$181	4.71 %	$21						History of Wisdomtree Trust-Wisdomtree Diefa Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-09	2009-03-31	N-CSR	Assetmark Funds-Assetmark Large Cap Growth Fund	Large-Cap Growth		Sold All	-11,848	-100 %				3.14 %	$-14,099						History of Assetmark Funds-Assetmark Large Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-09	2009-03-31	13F-HR/A	Delaware Management Business Trust	Institution	47,400	Sold Some	-21,950	-31.65 %	$1,795,986	$1,852,392	$56,406	3.14 %	$-26,121						History of Delaware Management Business Trust Ownership Of Alexion Pharmaceuticals Inc
2009-06-09	2009-03-31	N-CSRS	Ei Institutional Managed Trust-Small Cap Growth Fund	Small-Cap Growth	64,880	Added More	41,553	178.13 %	$2,458,303	$2,535,510	$77,207	3.14 %	$49,448						History of Ei Institutional Managed Trust-Small Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-09	2009-03-31	N-Q/A	Forum Funds-Adams Harkness Small Cap Growth Fund	Small-Cap Growth	1,495	Sold Some	-205	-12.05 %	$56,646	$58,425	$1,779	3.14 %	$-244						History of Forum Funds-Adams Harkness Small Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-09	2009-03-31	N-CSR	Nicholas Applegate Institutional Funds-International Growth Fund	Multi-Cap Growth	4,730	Sold Some	-1,670	-26.09 %	$179,220	$184,848	$5,629	3.14 %	$-1,987						History of Nicholas Applegate Institutional Funds-International Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-09	2009-03-31	N-CSRS	Northern Lights Fund Trust-Biondo Fund	Health/Biotech		Sold All	-150	-100 %				3.14 %	$-179						History of Northern Lights Fund Trust-Biondo Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-08	2009-03-31	N-CSR	Easons Series Trust-Mid Cap Growth Portfolio	Mid-Cap Growth		Sold All	-8,800	-100 %				6.95 %	$-22,352						History of Easons Series Trust-Mid Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-08	2009-03-31	N-CSRS	Mallcap World Fund Inc-Smallcap World Fund Inc	Small-Cap Core	300,000	No Change	0	0 %	$10,962,000	$11,724,000	$762,000	6.95 %	$0						History of Mallcap World Fund Inc-Smallcap World Fund Inc Ownership Of Alexion Pharmaceuticals Inc
2009-06-08	2009-03-31	N-CSR	Pacific Life Funds-Pl Comstock Fund	Specialty & Misc	8,950	No Change	0	0 %	$327,033	$349,766	$22,733	6.95 %	$0						History of Pacific Life Funds-Pl Comstock Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-08	2009-03-31	N-CSRS	Touchstone Funds Group Trust-Touchstone Healthcare And Biotechnology Fund	Health/Biotech	48,980	Added More	32,580	198.65 %	$1,789,729	$1,914,138	$124,409	6.95 %	$82,753						History of Touchstone Funds Group Trust-Touchstone Healthcare And Biotechnology Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-08	2009-03-31	N-CSRS	Turner Funds-Turner Emerging Growth Fund	Small-Cap Growth	257,610	Added More	53,790	26.39 %	$9,413,069	$10,067,399	$654,329	6.95 %	$136,627						History of Turner Funds-Turner Emerging Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-08	2009-03-31	N-CSRS	Turner Funds-Turner Large Cap Growth Fund	Large-Cap Growth		Sold All	-259,117	-100 %				6.95 %	$-658,157						History of Turner Funds-Turner Large Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-08	2009-03-31	N-CSRS	Turner Funds-Turner New Enterprise Fund	Science & Tech		Sold All	-13,010	-100 %				6.95 %	$-33,045						History of Turner Funds-Turner New Enterprise Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-08	2009-03-31	N-CSRS	Turner Funds-Turner Small Cap Growth Fund	Small-Cap Growth	87,638	Added More	7,060	8.76 %	$3,202,293	$3,424,893	$222,601	6.95 %	$17,932						History of Turner Funds-Turner Small Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-08	2009-03-31	N-CSRS	Turner Funds-Turner Strategic Growth Fund	Multi-Cap Growth	249,997	Sold Some	-11,983	-4.57 %	$9,134,890	$9,769,883	$634,992	6.95 %	$-30,437						History of Turner Funds-Turner Strategic Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-06-04	4	Dubin Thomas I H	Insider	12,593	Sold Some	-10,000	-44.26 %	$468,711	$492,134	$23,423	4.99 %	$-18,600		X			Svp General Counsel	History of Dubin Thomas I H Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	13F-HR/A	Amvescap Plc	Institution	76,700	Added More	35,021	84.02 %	$2,854,774	$2,997,436	$142,662	4.99 %	$65,139						History of Amvescap Plc Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSRS	Calvert Social Index Series Inc-Calvert Social Index Fund	Multi-Cap Core	1,259	New Holding	1,259	100 %	$46,860	$49,202	$2,342	4.99 %	$2,342						History of Calvert Social Index Series Inc-Calvert Social Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Ishares Trust-Ishares Nasdaq Biotechnology Index Fund	Health/Biotech	788,796	Sold Some	-23,607	-2.90 %	$29,358,987	$30,826,148	$1,467,161	4.99 %	$-43,909						History of Ishares Trust-Ishares Nasdaq Biotechnology Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Ishares Trust-Ishares Russell 2000 Growth Index Fund	Multi-Cap Growth	555,218	Added More	15,210	2.81 %	$20,665,214	$21,697,919	$1,032,705	4.99 %	$28,291						History of Ishares Trust-Ishares Russell 2000 Growth Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Ishares Trust-Ishares Russell 2000 Index Fund	Specialty & Misc	1,011,099	Sold Some	-119,563	-10.57 %	$37,633,105	$39,513,749	$1,880,644	4.99 %	$-222,387						History of Ishares Trust-Ishares Russell 2000 Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Ishares Trust-Ishares Russell 3000 Growth Index Fund	Multi-Cap Growth	5,553	Sold Some	-1,591	-22.27 %	$206,683	$217,011	$10,329	4.99 %	$-2,959						History of Ishares Trust-Ishares Russell 3000 Growth Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Ishares Trust-Ishares Russell 3000 Index Fund	Specialty & Misc	21,646	Sold Some	-4,127	-16.01 %	$805,664	$845,926	$40,262	4.99 %	$-7,676						History of Ishares Trust-Ishares Russell 3000 Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Mgi Funds-Mgi Us Large Cap Value Equity Fund	Large-Cap Value		Sold All	-60,102	-100 %				4.99 %	$-111,790						History of Mgi Funds-Mgi Us Large Cap Value Equity Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Rainier Investment Management Mutual Funds-Rainier Mid Cap Equity Portfolio	Mid-Cap Core	25,125	New Holding	25,125	100 %	$935,153	$981,885	$46,733	4.99 %	$46,733						History of Rainier Investment Management Mutual Funds-Rainier Mid Cap Equity Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Rydex Series Funds-Absolute Return Strategies Fund	Equity Mkt Neutral Funds		Sold All	-430	-100 %				4.99 %	$-800						History of Rydex Series Funds-Absolute Return Strategies Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Rydex Series Funds-Banking Fund	Financial Services	2,603	Sold Some	-660	-20.22 %	$96,884	$101,725	$4,842	4.99 %	$-1,228						History of Rydex Series Funds-Banking Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Rydex Series Funds-Biotechnology Fund	Health/Biotech	60,140	Added More	2,400	4.15 %	$2,238,411	$2,350,271	$111,860	4.99 %	$4,464						History of Rydex Series Funds-Biotechnology Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Rydex Series Funds-Health Care Fund	Health/Biotech		Sold All	-4,441	-100 %				4.99 %	$-8,260						History of Rydex Series Funds-Health Care Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	N-CSR	Rydex Series Funds-Sector Rotation Fund	Multi-Cap Core	31,500	Added More	1,000	3.27 %	$1,172,430	$1,231,020	$58,590	4.99 %	$1,860						History of Rydex Series Funds-Sector Rotation Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-05	2009-03-31	13F-HR/A	Teachers Advisors Inc	Institution	129,579	Added More	39,654	44.09 %	$4,822,930	$5,063,947	$241,017	4.99 %	$73,756						History of Teachers Advisors Inc Ownership Of Alexion Pharmaceuticals Inc
2009-06-04	2009-03-31	13F-HR/A	Jefferies Group Inc	Institution	7,943	Sold Some	-14,757	-65.00 %	$297,783	$310,412	$12,629	4.24 %	$-23,464						History of Jefferies Group Inc Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-06-01	4	Keiser David W	Insider	199,546	Added More	15,250	9.02 %	$7,764,335	$7,798,258	$33,923	0.43 %	$2,593	X					History of Keiser David W Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-06-01	4	Keiser David W	Insider	159,546	Sold Some	-1,800	-1.11 %	$6,207,935	$6,235,058	$27,123	0.43 %	$-306	X					History of Keiser David W Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-06-01	4	Keiser David W	Insider	161,346	Sold Some	-38,200	-19.14 %	$6,277,973	$6,305,402	$27,429	0.43 %	$-6,494	X					History of Keiser David W Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-06-01	4	Keiser David W	Insider	161,986	Added More	2,440	1.55 %	$6,302,875	$6,330,413	$27,538	0.43 %	$415	X					History of Keiser David W Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-06-01	4	Keiser David W	Insider	166,796	Added More	4,810	3.06 %	$6,490,032	$6,518,388	$28,355	0.43 %	$818	X					History of Keiser David W Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-06-01	4	Keiser David W	Insider	184,296	Added More	17,500	11.72 %	$7,170,957	$7,202,288	$31,330	0.43 %	$2,975	X					History of Keiser David W Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-06-01	4	Keiser David W	Insider	149,546	Sold Some	-10,000	-6.26 %	$5,818,835	$5,844,258	$25,423	0.43 %	$-1,700	X					History of Keiser David W Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-03-31	13F-HR/A	Catapult Capital Management Llc	Institution	42,000	Sold Some	-38,000	-47.50 %	$1,634,220	$1,641,360	$7,140	0.43 %	$-6,460						History of Catapult Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-03-31	N-CSRS	Loomis Sayles Funds I-Loomis Sayles Bond Fund	Specialty & Misc	18,083	New Holding	18,083	100 %	$703,610	$706,684	$3,074	0.43 %	$3,074						History of Loomis Sayles Funds I-Loomis Sayles Bond Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-03-31	N-CSRS	Loomis Sayles Funds Ii-Loomis Sayles Aggressive Growth Fund	Mid-Cap Growth	34,673	Sold Some	-10,381	-23.04 %	$1,349,126	$1,355,021	$5,894	0.43 %	$-1,765						History of Loomis Sayles Funds Ii-Loomis Sayles Aggressive Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-03-31	N-CSRS	Loomis Sayles Funds Ii-Loomis Sayles Small Cap Growth Fund	Small-Cap Growth	18,083	Sold Some	-700	-3.72 %	$703,610	$706,684	$3,074	0.43 %	$-119						History of Loomis Sayles Funds Ii-Loomis Sayles Small Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-03-31	N-CSRS	Tiaa Cref Institutional Mutual Funds-Equity Index Fund	Specialty & Misc	20,298	Added More	1,341	7.07 %	$789,795	$793,246	$3,451	0.43 %	$228						History of Tiaa Cref Institutional Mutual Funds-Equity Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-03	2009-03-31	N-CSRS	Tiaa Cref Institutional Mutual Funds-Growth Equity Fund	Multi-Cap Growth	29,163	Added More	5,503	23.25 %	$1,134,732	$1,139,690	$4,958	0.43 %	$936						History of Tiaa Cref Institutional Mutual Funds-Growth Equity Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Advanced Series Trust-Ast International Value Portfolio	Multi-Cap Value	4,200	New Holding	4,200	100 %	$152,796	$164,136	$11,340	7.42 %	$11,340						History of Advanced Series Trust-Ast International Value Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q/A	Axa Premier Vip Trust-Multimanager Small Cap Growth Portfolio	Small-Cap Growth	111,340	Sold Some	-91,660	-45.15 %	$4,050,549	$4,351,167	$300,618	7.42 %	$-247,482						History of Axa Premier Vip Trust-Multimanager Small Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Massmutual Select Funds-Massmutual Select Emerging Growth Fund	Small-Cap Growth	12,300	Sold Some	-20,400	-62.38 %	$447,474	$480,684	$33,210	7.42 %	$-55,080						History of Massmutual Select Funds-Massmutual Select Emerging Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Massmutual Select Funds-Massmutual Select Mid Cap Growth Equity Fund	Mid-Cap Growth	8,600	Sold Some	-4,300	-33.33 %	$312,868	$336,088	$23,220	7.42 %	$-11,610						History of Massmutual Select Funds-Massmutual Select Mid Cap Growth Equity Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Massmutual Select Funds-Massmutual Select Mid Cap Growth Equity Ii Fund	Mid-Cap Growth	103,000	Added More	18,900	22.47 %	$3,747,140	$4,025,240	$278,100	7.42 %	$51,030						History of Massmutual Select Funds-Massmutual Select Mid Cap Growth Equity Ii Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Massmutual Select Funds-Massmutual Select Small Cap Growth Equity Fund	Small-Cap Growth		Sold All	-13,520	-100 %				7.42 %	$-36,504						History of Massmutual Select Funds-Massmutual Select Small Cap Growth Equity Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Massmutual Select Funds-Massmutual Select Small Company Growth Fund	Small-Cap Growth	5,810	Added More	490	9.21 %	$211,368	$227,055	$15,687	7.42 %	$1,323						History of Massmutual Select Funds-Massmutual Select Small Company Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Massmutual Select Funds-Massmutual Select Strategic Balanced Fund	Mixed-Asset Target Allocation Moderate	487	Sold Some	-113	-18.83 %	$17,717	$19,032	$1,315	7.42 %	$-305						History of Massmutual Select Funds-Massmutual Select Strategic Balanced Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Neuberger Berman Advisers Management Trust-Balanced Portfolio	Flexible Portfolio	1,800	Added More	800	80.00 %	$65,484	$70,344	$4,860	7.42 %	$2,160						History of Neuberger Berman Advisers Management Trust-Balanced Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Neuberger Berman Advisers Management Trust-Growth Portfolio	Multi-Cap Growth	88,700	Added More	37,700	73.92 %	$3,226,906	$3,466,396	$239,490	7.42 %	$101,790						History of Neuberger Berman Advisers Management Trust-Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Rydex Dynamic Funds-Dynamic Russell 2000 Fund	No Data	1,377	New Holding	1,377	100 %	$50,095	$53,813	$3,718	7.42 %	$3,718						History of Rydex Dynamic Funds-Dynamic Russell 2000 Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Rydex Variable Trust-Biotechnology Fund	Health/Biotech	19,297	Sold Some	-3,297	-14.59 %	$702,025	$754,127	$52,102	7.42 %	$-8,902						History of Rydex Variable Trust-Biotechnology Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Rydex Variable Trust-Health Care Fund	Health/Biotech		Sold All	-5,490	-100 %				7.42 %	$-14,823						History of Rydex Variable Trust-Health Care Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Rydex Variable Trust-Sector Rotation Fund	Specialty & Misc	11,800	Added More	1,400	13.46 %	$429,284	$461,144	$31,860	7.42 %	$3,780						History of Rydex Variable Trust-Sector Rotation Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Un Capital Advisers Trust-Sc Oppenheimer Main Street Small Cap Fund	Small-Cap Core	4,200	Added More	1,400	50.00 %	$152,796	$164,136	$11,340	7.42 %	$3,780						History of Un Capital Advisers Trust-Sc Oppenheimer Main Street Small Cap Fund Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Value Line Premier Growth Fund Inc-Value Line Premier Growth Fund Inc	Large-Cap Growth	56,000	No Change	0	0 %	$2,037,280	$2,188,480	$151,200	7.42 %	$0						History of Value Line Premier Growth Fund Inc-Value Line Premier Growth Fund Inc Ownership Of Alexion Pharmaceuticals Inc
2009-06-01	2009-03-31	N-Q	Value Line Strategic Asset Management Trust-Value Line Strategic Asset Management Trust	Multi-Cap Value	34,000	No Change	0	0 %	$1,236,920	$1,328,720	$91,800	7.42 %	$0						History of Value Line Strategic Asset Management Trust-Value Line Strategic Asset Management Trust Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Alger American Fund-Alger American Growth Portfolio	Multi-Cap Growth	27,200	New Holding	27,200	100 %	$992,800	$1,062,976	$70,176	7.06 %	$70,176						History of Alger American Fund-Alger American Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Alger American Fund-Alger American Midcap Growth Portfolio	Mid-Cap Growth	17,000	New Holding	17,000	100 %	$620,500	$664,360	$43,860	7.06 %	$43,860						History of Alger American Fund-Alger American Midcap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Alger American Fund-Alger American Small Capitalization Portfolio	Small-Cap Core	105,700	New Holding	105,700	100 %	$3,858,050	$4,130,756	$272,706	7.06 %	$272,706						History of Alger American Fund-Alger American Small Capitalization Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Alger American Fund-Alger American Smallcap And Midcap Growth Portfolio	No Data	330	No Compare			$12,045	$12,896	$851	7.06 %							History of Alger American Fund-Alger American Smallcap And Midcap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Allianz Funds-Occ Value	Large-Cap Value	20,545	Sold Some	-20,385	-49.80 %	$749,893	$802,899	$53,006	7.06 %	$-52,593						History of Allianz Funds-Occ Value Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Allianz Variable Insurance Products Trust-Azl Lmp Small Cap Growth Fund	Small-Cap Growth	2,880	No Change	0	0 %	$105,120	$112,550	$7,430	7.06 %	$0						History of Allianz Variable Insurance Products Trust-Azl Lmp Small Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	American Century Variable Portfolios Inc-Vp Vista Fund	Specialty & Misc	15,660	Added More	1,088	7.46 %	$571,590	$611,993	$40,403	7.06 %	$2,807						History of American Century Variable Portfolios Inc-Vp Vista Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Anchor Series Trust-Growth Portfolio	Multi-Cap Growth	1,636	New Holding	1,636	100 %	$59,714	$63,935	$4,221	7.06 %	$4,221						History of Anchor Series Trust-Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Calvert Variable Series Inc-Ameritas Mid Cap Growth Portfolio	Mid-Cap Growth	4,350	New Holding	4,350	100 %	$158,775	$169,998	$11,223	7.06 %	$11,223						History of Calvert Variable Series Inc-Ameritas Mid Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Dws Investments Vit Funds-Dws Small Cap Index Vip	Small-Cap Core	25,796	Added More	2,100	8.86 %	$941,554	$1,008,108	$66,554	7.06 %	$5,418						History of Dws Investments Vit Funds-Dws Small Cap Index Vip Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Dws Variable Series I-Dws Health Care Vip	Health/Biotech	23,500	No Change	0	0 %	$857,750	$918,380	$60,630	7.06 %	$0						History of Dws Variable Series I-Dws Health Care Vip Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Dws Variable Series Ii-Dws Balanced Vip	Flexible Portfolio	5,600	Added More	4,800	600.00 %	$204,400	$218,848	$14,448	7.06 %	$12,384						History of Dws Variable Series Ii-Dws Balanced Vip Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Dws Variable Series Ii-Dws Mid Cap Growth Vip	Mid-Cap Growth	1,200	No Change	0	0 %	$43,800	$46,896	$3,096	7.06 %	$0						History of Dws Variable Series Ii-Dws Mid Cap Growth Vip Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Dws Variable Series Ii-Dws Small Cap Growth Vip	Small-Cap Growth	18,800	Added More	300	1.62 %	$686,200	$734,704	$48,504	7.06 %	$774						History of Dws Variable Series Ii-Dws Small Cap Growth Vip Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Dws Variable Series Ii-Dws Turner Mid Cap Growth Vip	Mid-Cap Growth	14,310	Sold Some	-3,070	-17.66 %	$522,315	$559,235	$36,920	7.06 %	$-7,921						History of Dws Variable Series Ii-Dws Turner Mid Cap Growth Vip Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Eq Advisors Trust-Eqalliancebernstein Common Stock Portfolio	Specialty & Misc	32,100	No Change	0	0 %	$1,171,650	$1,254,468	$82,818	7.06 %	$0						History of Eq Advisors Trust-Eqalliancebernstein Common Stock Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Eq Advisors Trust-Eqalliancebernstein Small Cap Growth Portfolio	Small-Cap Growth	206,200	Added More	17,300	9.15 %	$7,526,300	$8,058,296	$531,996	7.06 %	$44,634						History of Eq Advisors Trust-Eqalliancebernstein Small Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Eq Advisors Trust-Eqbond Index Portfolio	Specialty & Misc	114,540	Added More	49,080	74.97 %	$4,180,710	$4,476,223	$295,513	7.06 %	$126,626						History of Eq Advisors Trust-Eqbond Index Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Eq Advisors Trust-Eqoppenheimer Main Street Small Cap Portfolio	Small-Cap Core	1,580	Added More	350	28.45 %	$57,670	$61,746	$4,076	7.06 %	$903						History of Eq Advisors Trust-Eqoppenheimer Main Street Small Cap Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Fidelity Contrafund-Fidelity Advisor New Insights Fund	Multi-Cap Growth		Sold All	-249,100	-100 %				7.06 %	$-642,678						History of Fidelity Contrafund-Fidelity Advisor New Insights Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	13F-HR/A	Fidelity International Ltd	Institution		Sold All	-1,600	-100 %				7.06 %	$-4,128						History of Fidelity International Ltd Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Fidelity Trend Fund-Fidelity Trend Fund	Large-Cap Core	35,100	Sold Some	-10,900	-23.69 %	$1,281,150	$1,371,708	$90,558	7.06 %	$-28,122						History of Fidelity Trend Fund-Fidelity Trend Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	13F-HR/A	Fmr Corp	Institution	12,252,696	Added More	565,438	4.83 %	$447,223,404	$478,835,360	$31,611,956	7.06 %	$1,458,830						History of Fmr Corp Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Forward Funds-Forward Legato Fund	Small-Cap Core	33,242	Sold Some	-20,520	-38.16 %	$1,213,333	$1,299,097	$85,764	7.06 %	$-52,942						History of Forward Funds-Forward Legato Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	John Hancock Funds Ii-Mid Cap Stock Fund	Mid-Cap Growth		Sold All	-28,300	-100 %				7.06 %	$-73,014						History of John Hancock Funds Ii-Mid Cap Stock Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	John Hancock Trust-Vista Trust	Specialty & Misc		Sold All	-13,300	-100 %				7.06 %	$-34,314						History of John Hancock Trust-Vista Trust Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Jpmorgan Insurance Trust-Jpmorgan Insurance Trust Balanced Portfolio	Flexible Portfolio	2,335	New Holding	2,335	100 %	$85,228	$91,252	$6,024	7.06 %	$6,024						History of Jpmorgan Insurance Trust-Jpmorgan Insurance Trust Balanced Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Jpmorgan Insurance Trust-Jpmorgan Insurance Trust Small Cap Equity Portfolio	Small-Cap Core	425	New Holding	425	100 %	$15,513	$16,609	$1,097	7.06 %	$1,097						History of Jpmorgan Insurance Trust-Jpmorgan Insurance Trust Small Cap Equity Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Jpmorgan Trust I-Jpmorgan Asia Equity Fund	Specialty & Misc	18	New Holding	18	100 %	$657	$703	$46	7.06 %	$46						History of Jpmorgan Trust I-Jpmorgan Asia Equity Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Jpmorgan Trust I-Jpmorgan Disciplined Equity Fund	Specialty & Misc	9	New Holding	9	100 %	$329	$352	$23	7.06 %	$23						History of Jpmorgan Trust I-Jpmorgan Disciplined Equity Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Jpmorgan Trust I-Jpmorgan Diversified Fund	Flexible Portfolio	3	No Change	0	0 %	$110	$117	$8	7.06 %	$0						History of Jpmorgan Trust I-Jpmorgan Diversified Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Jpmorgan Trust I-Jpmorgan Japan Fund	Japanese	52	New Holding	52	100 %	$1,898	$2,032	$134	7.06 %	$134						History of Jpmorgan Trust I-Jpmorgan Japan Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Jpmorgan Trust I-Jpmorgan Small Cap Core Fund	Small-Cap Core	61	New Holding	61	100 %	$2,227	$2,384	$157	7.06 %	$157						History of Jpmorgan Trust I-Jpmorgan Small Cap Core Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Lord Abbett Series Fund Inc-Growth Opportunities Portfolio	Multi-Cap Growth	15,573	Sold Some	-8,853	-36.24 %	$568,415	$608,593	$40,178	7.06 %	$-22,841						History of Lord Abbett Series Fund Inc-Growth Opportunities Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Maxim Series Fund Inc-Maxim Small-Cap Growth Portfolio	No Data	62,600	Added More	23,800	61.34 %	$2,284,900	$2,446,408	$161,508	7.06 %	$61,404						History of Maxim Series Fund Inc-Maxim Small-Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Maxim Series Fund Inc-Maxim Small-Cap Growth Portfolio	No Data	62,600	Added More	34,700	124.37 %	$2,284,900	$2,446,408	$161,508	7.06 %	$89,526						History of Maxim Series Fund Inc-Maxim Small-Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Oberweis Funds-Oberweis China Opportunities Fund	China Region	1,100	New Holding	1,100	100 %	$40,150	$42,988	$2,838	7.06 %	$2,838						History of Oberweis Funds-Oberweis China Opportunities Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Oppenheimer Variable Account Funds-Oppenheimer Main Street Fundva	Specialty & Misc		Sold All	-11,900	-100 %				7.06 %	$-30,702						History of Oppenheimer Variable Account Funds-Oppenheimer Main Street Fundva Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Phoenix Edge Series Fund-Phoenix Capital Growth	Large-Cap Growth	19,900	New Holding	19,900	100 %	$726,350	$777,692	$51,342	7.06 %	$51,342						History of Phoenix Edge Series Fund-Phoenix Capital Growth Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Pioneer Research Fund-Pioneer Research Fund	Large-Cap Core	14,000	New Holding	14,000	100 %	$511,000	$547,120	$36,120	7.06 %	$36,120						History of Pioneer Research Fund-Pioneer Research Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Pioneer Series Trust Ii-Pioneer Growth Opportunities Fund	Multi-Cap Growth	42,100	New Holding	42,100	100 %	$1,536,650	$1,645,268	$108,618	7.06 %	$108,618						History of Pioneer Series Trust Ii-Pioneer Growth Opportunities Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Pioneer Variable Contracts Trust Ma-Pioneer Growth Opportunities Vct Portfolio	Multi-Cap Growth	20,300	New Holding	20,300	100 %	$740,950	$793,324	$52,374	7.06 %	$52,374						History of Pioneer Variable Contracts Trust Ma-Pioneer Growth Opportunities Vct Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Profunds-Bull Profund	Large-Cap Core	1,064	Sold Some	-5,684	-84.23 %	$38,836	$41,581	$2,745	7.06 %	$-14,665						History of Profunds-Bull Profund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Profunds-Profund Vp Health Care	Health/Biotech		Sold All	-3,320	-100 %				7.06 %	$-8,566						History of Profunds-Profund Vp Health Care Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Putnam Variable Trust-Putnam Vt Vista Fund	Specialty & Misc	42,500	New Holding	42,500	100 %	$1,551,250	$1,660,900	$109,650	7.06 %	$109,650						History of Putnam Variable Trust-Putnam Vt Vista Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Treettracks Series Trust-Spdr Dividend Etf	Specialty & Misc	500,641	New Holding	500,641	100 %	$18,273,397	$19,565,050	$1,291,654	7.06 %	$1,291,654						History of Treettracks Series Trust-Spdr Dividend Etf Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Vanguard Variable Insurance Funds-Balanced Portfolio	Flexible Portfolio		Sold All	-26,773	-100 %				7.06 %	$-69,074						History of Vanguard Variable Insurance Funds-Balanced Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Variable Insurance Products Fund Ii-Contrafund Portfolio	Specialty & Misc	27,700	New Holding	27,700	100 %	$1,011,050	$1,082,516	$71,466	7.06 %	$71,466						History of Variable Insurance Products Fund Ii-Contrafund Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Variable Insurance Products Fund Ii-Disciplined Small Cap Portfolio	Small-Cap Core	1,110	Added More	432	63.71 %	$40,515	$43,379	$2,864	7.06 %	$1,115						History of Variable Insurance Products Fund Ii-Disciplined Small Cap Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Variable Insurance Products Fund Iv-Consumer Discretionary Portfolio	Specialty & Misc		Sold All	-1,000	-100 %				7.06 %	$-2,580						History of Variable Insurance Products Fund Iv-Consumer Discretionary Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Variable Insurance Products Fund Iv-Growth Stock Portfolio	Multi-Cap Growth	600	Sold Some	-1,500	-71.42 %	$21,900	$23,448	$1,548	7.06 %	$-3,870						History of Variable Insurance Products Fund Iv-Growth Stock Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Variable Insurance Products Fund Iv-Health Care Portfolio	Health/Biotech	11,900	Added More	7,000	142.85 %	$434,350	$465,052	$30,702	7.06 %	$18,060						History of Variable Insurance Products Fund Iv-Health Care Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Variable Insurance Products Iii-Growth Opportunities Portfolio	Multi-Cap Growth	21,300	New Holding	21,300	100 %	$777,450	$832,404	$54,954	7.06 %	$54,954						History of Variable Insurance Products Iii-Growth Opportunities Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Wilshire Mutual Funds Inc-Dow Jones Wilshire 5000 Index Portfolio	Multi-Cap Core		Sold All	-4,500	-100 %				7.06 %	$-11,610						History of Wilshire Mutual Funds Inc-Dow Jones Wilshire 5000 Index Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-29	2009-03-31	N-Q	Wilshire Mutual Funds Inc-Wilshire Small Company Growth Portfolio	Small-Cap Growth	1,050	No Change	0	0 %	$38,325	$41,034	$2,709	7.06 %	$0						History of Wilshire Mutual Funds Inc-Wilshire Small Company Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	13F-HR/A	Bank Of America Corp	Institution		Sold All	-583,548	-100 %				9.22 %	$-1,925,708						History of Bank Of America Corp Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	13F-HR/A	Clearbridge Advisors Llc	Institution	413,036	Sold Some	-94,005	-18.53 %	$14,778,428	$16,141,447	$1,363,019	9.22 %	$-310,217						History of Clearbridge Advisors Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Dreyfus Founders Funds Inc-Dreyfus Founders Discovery Fund	Small-Cap Growth	41,780	Added More	240	0.57 %	$1,494,888	$1,632,762	$137,874	9.22 %	$792						History of Dreyfus Founders Funds Inc-Dreyfus Founders Discovery Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Dreyfus Founders Funds Inc-Dreyfus Founders Growth Fund	Large-Cap Growth	97,033	New Holding	97,033	100 %	$3,471,841	$3,792,050	$320,209	9.22 %	$320,209						History of Dreyfus Founders Funds Inc-Dreyfus Founders Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Dreyfus Variable Investment Fund-Developing Leaders Portfolio	Specialty & Misc		Sold All	-325,000	-100 %				9.22 %	$-1,072,500						History of Dreyfus Variable Investment Fund-Developing Leaders Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Dreyfus Variable Investment Fund-Growth And Income Portfolio	Multi-Cap Growth	5,500	New Holding	5,500	100 %	$196,790	$214,940	$18,150	9.22 %	$18,150						History of Dreyfus Variable Investment Fund-Growth And Income Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Evergreen Variable Annuity Trust De-Evergreen Va Growth Fund	Multi-Cap Growth	10,800	Sold Some	-5,000	-31.64 %	$386,424	$422,064	$35,640	9.22 %	$-16,500						History of Evergreen Variable Annuity Trust De-Evergreen Va Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-CSRS	Fidelity Central Investment Portfolios Llc-Fidelity Health Care	Health/Biotech	116,318	New Holding	116,318	100 %	$4,161,858	$4,545,707	$383,849	9.22 %	$383,849						History of Fidelity Central Investment Portfolios Llc-Fidelity Health Care Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-CSRS	Fidelity Central Investment Portfolios Llc-Fidelity Utilitie	Utility		Sold All	-45,800	-100 %				9.22 %	$-151,140						History of Fidelity Central Investment Portfolios Llc-Fidelity Utilitie Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Jp Morgan Series Trust Ii-Jpmorgan Small Company Portfolio	Small-Cap Core	8,300	New Holding	8,300	100 %	$296,974	$324,364	$27,390	9.22 %	$27,390						History of Jp Morgan Series Trust Ii-Jpmorgan Small Company Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Legg Mason Partners Equity Trust-Legg Mason Partners Small Cap Growth Fund	Small-Cap Growth		Sold All	-437,200	-100 %				9.22 %	$-1,442,760						History of Legg Mason Partners Equity Trust-Legg Mason Partners Small Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Legg Mason Partners Variable Equity Trust-Legg Mason Partners Variable Small Cap Growth Portfolio	Small-Cap Growth		Sold All	-68,040	-100 %				9.22 %	$-224,532						History of Legg Mason Partners Variable Equity Trust-Legg Mason Partners Variable Small Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Masters Select Funds Trust-The Masters Select Smaller Companies Fund	Small-Cap Core	32,419	No Change	0	0 %	$1,159,952	$1,266,935	$106,983	9.22 %	$0						History of Masters Select Funds Trust-The Masters Select Smaller Companies Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	13F-HR/A	Merrill Lynch And Co Inc	Institution		Sold All	-15,661	-100 %				9.22 %	$-51,681						History of Merrill Lynch And Co Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Mma Praxis Mutual Funds-Mma Praxis Growth Index Fund	Large-Cap Growth	383	No Change	0	0 %	$13,704	$14,968	$1,264	9.22 %	$0						History of Mma Praxis Mutual Funds-Mma Praxis Growth Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	13F-HR	Northern Trust Co Of Connecticut	Institution	63,301	Added More	1,392	2.24 %	$2,264,910	$2,473,803	$208,893	9.22 %	$4,594						History of Northern Trust Co Of Connecticut Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	13F-HR/A	Oppenheimer Funds Inc	Institution	893,705	Added More	59,105	7.08 %	$31,976,765	$34,925,991	$2,949,227	9.22 %	$195,047						History of Oppenheimer Funds Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Pacific Select Fund-Pacific Select Fund	Pacific Region	5,300	Added More	100	1.92 %	$189,634	$207,124	$17,490	9.22 %	$330						History of Pacific Select Fund-Pacific Select Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Rs Investment Trust-Rs Emerging Growth Fund	Emerging Markets		Sold All	-56,690	-100 %				9.22 %	$-187,077						History of Rs Investment Trust-Rs Emerging Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Rs Investment Trust-Rs Smaller Company Growth Fund	Small-Cap Growth		Sold All	-28,380	-100 %				9.22 %	$-93,654						History of Rs Investment Trust-Rs Smaller Company Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Vanguard Balanced Index Funds-Vanguard Balanced Index Fund	Mixed-Asset Target Allocation Growth		Sold All	-34,092	-100 %				9.22 %	$-112,504						History of Vanguard Balanced Index Funds-Vanguard Balanced Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Vanguard Index Funds-Vanguard Extended Market Index Fund	Mid-Cap Core		Sold All	-425,465	-100 %				9.22 %	$-1,404,035						History of Vanguard Index Funds-Vanguard Extended Market Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-28	2009-03-31	N-Q	Vanguard Index Funds-Vanguard Total Stock Market Index Fund	Multi-Cap Core		Sold All	-618,074	-100 %				9.22 %	$-2,039,644						History of Vanguard Index Funds-Vanguard Total Stock Market Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-27	2009-03-31	N-Q	Advisors Series Trust-Capital Advisors Growth Fund	Multi-Cap Growth		Sold All	-4,500	-100 %				9.59 %	$-15,390						History of Advisors Series Trust-Capital Advisors Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-27	2009-03-31	N-Q	Eligman Capital Fund Inc-Seligman Capital Fund Inc	Mid-Cap Growth	24,100	No Change	0	0 %	$859,406	$941,828	$82,422	9.59 %	$0						History of Eligman Capital Fund Inc-Seligman Capital Fund Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-27	2009-03-31	N-Q	Eligman Portfolios Incny-Seligman Capital Portfolio	Specialty & Misc	700	No Change	0	0 %	$24,962	$27,356	$2,394	9.59 %	$0						History of Eligman Portfolios Incny-Seligman Capital Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-27	2009-03-31	N-Q	Jpmorgan Trust Ii-Jpmorgan Technology Fund	Science & Tech		Sold All	-7	-100 %				9.59 %	$-24						History of Jpmorgan Trust Ii-Jpmorgan Technology Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-27	2009-03-31	N-Q	Mml Series Investment Fund Ii-Mml Small Cap Equity Fund	Small-Cap Core	2,260	New Holding	2,260	100 %	$80,592	$88,321	$7,729	9.59 %	$7,729						History of Mml Series Investment Fund Ii-Mml Small Cap Equity Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-27	2009-03-31	N-Q	Mml Series Investment Fund-Mml Emerging Growth Fund	Emerging Markets	4,100	New Holding	4,100	100 %	$146,206	$160,228	$14,022	9.59 %	$14,022						History of Mml Series Investment Fund-Mml Emerging Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-27	2009-03-31	N-Q	Mml Series Investment Fund-Mml Mid Cap Growth Fund	Mid-Cap Growth	24,600	New Holding	24,600	100 %	$877,236	$961,368	$84,132	9.59 %	$84,132						History of Mml Series Investment Fund-Mml Mid Cap Growth Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-27	2009-03-31	N-CSRS	Oppenheimer Discovery Fund-Oppenheimer Discovery Fund	Small-Cap Growth	222,600	New Holding	222,600	100 %	$7,937,916	$8,699,208	$761,292	9.59 %	$761,292						History of Oppenheimer Discovery Fund-Oppenheimer Discovery Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-27	2009-03-31	N-Q	Oppenheimer Main Street Small Cap Fund-Oppenheimer Main Street Small Cap Fund	Small-Cap Core		Sold All	-69,300	-100 %				9.59 %	$-237,006						History of Oppenheimer Main Street Small Cap Fund-Oppenheimer Main Street Small Cap Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	N-Q	Columbia Acorn Trust-Columbia Acorn Usa	Specialty & Misc	235,000	Sold Some	-235,000	-50.00 %	$8,394,200	$9,183,800	$789,600	9.40 %	$-789,600						History of Columbia Acorn Trust-Columbia Acorn Usa Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	N-Q	Ge Investment Funds Inc-Money Market Fund	Specialty & Misc	1,200	New Holding	1,200	100 %	$42,864	$46,896	$4,032	9.40 %	$4,032						History of Ge Investment Funds Inc-Money Market Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	N-Q	Jnl Variable Fund Llc-Jnlmcm Healthcare Sector Fund	Health/Biotech	8	No Change	0	0 %	$286	$313	$27	9.40 %	$0						History of Jnl Variable Fund Llc-Jnlmcm Healthcare Sector Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	N-Q	Ohio National Fund Inc-Bryton Growth Portfolio	Multi-Cap Growth	14,000	New Holding	14,000	100 %	$500,080	$547,120	$47,040	9.40 %	$47,040						History of Ohio National Fund Inc-Bryton Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	N-Q	Ohio National Fund Inc-Millennium Portfolio	Mid-Cap Growth	9,700	New Holding	9,700	100 %	$346,484	$379,076	$32,592	9.40 %	$32,592						History of Ohio National Fund Inc-Millennium Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	13F-HR	Qa3 Financial Llc	No Data	6	No Change	0	0 %	$214	$234	$20	9.40 %	$0						History of Qa3 Financial Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	13F-HR/A	Royal Bank Of Canada Investment Management Uk Ltd	Institution	6,365	Sold Some	-1,036	-13.99 %	$227,358	$248,744	$21,386	9.40 %	$-3,481						History of Royal Bank Of Canada Investment Management Uk Ltd Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	13F-HR/A	Td Asset Management Inc	Institution	162,200	Sold Some	-11,100	-6.40 %	$5,793,784	$6,338,776	$544,992	9.40 %	$-37,296						History of Td Asset Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	N-Q	Tiaa Cref Life Fund-Social Choice Equity Fund	Multi-Cap Core		Sold All	-200	-100 %				9.40 %	$-672						History of Tiaa Cref Life Fund-Social Choice Equity Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	N-Q	Tiaa Cref Life Fund-Stock Index Fund	Specialty & Misc	1,066	Added More	190	21.68 %	$38,078	$41,659	$3,582	9.40 %	$638						History of Tiaa Cref Life Fund-Stock Index Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-26	2009-03-31	N-Q	Wells Fargo Variable Trust-Vt Discovery Fund	Specialty & Misc	21,300	New Holding	21,300	100 %	$760,836	$832,404	$71,568	9.40 %	$71,568						History of Wells Fargo Variable Trust-Vt Discovery Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-21	2009-03-31	13F-HR/A	Allianz Global Investors Of America L P	Institution	125,113	Sold Some	-7,018	-5.31 %	$4,136,236	$4,889,416	$753,180	18.20 %	$-42,248						History of Allianz Global Investors Of America L P Ownership Of Alexion Pharmaceuticals Inc
2009-05-20	2009-03-31	13F-HR/A	Visium Asset Management Llc	Institution	200,000	Added More	190,000	1900.00 %	$6,584,000	$7,816,000	$1,232,000	18.71 %	$1,170,400						History of Visium Asset Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-19	2009-03-31	13F-HR/A	Zebra Capital Management Llc	Institution	100	Sold Some	-154	-60.62 %	$3,290	$3,908	$618	18.78 %	$-952						History of Zebra Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-18	2009-03-31	13F-HR/A	Ashfield Capital Partners Llc	Institution	1,635	New Holding	1,635	100 %	$54,478	$63,896	$9,418	17.28 %	$9,418						History of Ashfield Capital Partners Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-18	2009-03-31	13F-HR	Davidson D A And Co	Institution	6,161	Sold Some	-6,158	-49.98 %	$205,285	$240,772	$35,487	17.28 %	$-35,470						History of Davidson D A And Co Ownership Of Alexion Pharmaceuticals Inc
2009-05-18	2009-03-31	13F-HR/A	Diamondback Capital Management Llc	Institution	126,900	Added More	84,647	200.33 %	$4,228,308	$4,959,252	$730,944	17.28 %	$487,567						History of Diamondback Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-18	2009-03-31	13F-HR/A	Highbridge Capital Management Llc	Institution	270,814	Added More	216,147	395.38 %	$9,023,522	$10,583,411	$1,559,889	17.28 %	$1,245,007						History of Highbridge Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-18	2009-03-31	N-Q	Mutual Of America Institutional Funds Inc-Bond Fund	Specialty & Misc	1,024	Added More	150	17.16 %	$34,120	$40,018	$5,898	17.28 %	$864						History of Mutual Of America Institutional Funds Inc-Bond Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-18	2009-03-31	N-Q	Mutual Of America Investment Corp-Bond Fund	Specialty & Misc	56,312	Added More	7,250	14.77 %	$1,876,316	$2,200,673	$324,357	17.28 %	$41,760						History of Mutual Of America Investment Corp-Bond Fund Ownership Of Alexion Pharmaceuticals Inc
2009-05-18	2009-03-31	13F-HR	Value Line Inc	Institution	238,700	Added More	21,200	9.74 %	$7,953,484	$9,328,396	$1,374,912	17.28 %	$122,112						History of Value Line Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-18	2008-12-31	13F-HR/A	Value Line Inc	Institution	217,500	Sold Some	-21,200	-8.88 %	$7,247,100	$8,499,900	$1,252,800	17.28 %	$-122,112						History of Value Line Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-18	2008-09-30	13F-HR/A	Value Line Inc	Institution	238,700	Added More	119,600	100.41 %	$7,953,484	$9,328,396	$1,374,912	17.28 %	$688,896						History of Value Line Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-05-15	13F-HR	Credit Suisse	Institution		Sold All	-44,143	-100 %				15.96 %	$-237,489						History of Credit Suisse Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	1798 Global Partners Ltd	Institution	30,000	New Holding	30,000	100 %	$1,011,000	$1,172,400	$161,400	15.96 %	$161,400						History of 1798 Global Partners Ltd Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Alger Fred Management Inc	Institution	1,757,608	Sold Some	-594,379	-25.27 %	$59,231,390	$68,687,321	$9,455,931	15.96 %	$-3,197,759						History of Alger Fred Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Aqr Capital Management Llc	Institution	16,900	New Holding	16,900	100 %	$569,530	$660,452	$90,922	15.96 %	$90,922						History of Aqr Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Ashfield And Co Inc	Institution	1,635	New Holding	1,635	100 %	$55,100	$63,896	$8,796	15.96 %	$8,796						History of Ashfield And Co Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Axa	Institution	3,178,327	Sold Some	-299,181	-8.60 %	$107,109,620	$124,209,019	$17,099,399	15.96 %	$-1,609,594						History of Axa Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Bartlett And Co	Institution	1,200	No Change	0	0 %	$40,440	$46,896	$6,456	15.96 %	$0						History of Bartlett And Co Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Batterymarch Financial Management Inc	Institution	27,052	Sold Some	-113,478	-80.75 %	$911,652	$1,057,192	$145,540	15.96 %	$-610,512						History of Batterymarch Financial Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Blair William And Co	Institution	78,965	New Holding	78,965	100 %	$2,661,121	$3,085,952	$424,832	15.96 %	$424,832						History of Blair William And Co Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Bridgewater Investment Management Llc	Institution	85	New Holding	85	100 %	$2,865	$3,322	$457	15.96 %	$457						History of Bridgewater Investment Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Bridgeway Capital Management Inc	Institution	39,400	No Change	0	0 %	$1,327,780	$1,539,752	$211,972	15.96 %	$0						History of Bridgeway Capital Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Caisse De Depot Et Placement Du Quebec	Institution		Sold All	-5,697	-100 %				15.96 %	$-30,650						History of Caisse De Depot Et Placement Du Quebec Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Capital One Financial Corp	Institution	140	New Holding	140	100 %	$4,718	$5,471	$753	15.96 %	$753						History of Capital One Financial Corp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Capital World Investor	Institution	300,000	No Change	0	0 %	$10,110,000	$11,724,000	$1,614,000	15.96 %	$0						History of Capital World Investor Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Citadel L P	Institution	202,857	New Holding	202,857	100 %	$6,836,281	$7,927,652	$1,091,371	15.96 %	$1,091,371						History of Citadel L P Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Citigroup Inc	Institution	176,809	Sold Some	-130,935	-42.54 %	$5,958,463	$6,909,696	$951,232	15.96 %	$-704,430						History of Citigroup Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Driehaus Capital Management Llc	Institution	383,608	Added More	105,108	37.74 %	$12,927,590	$14,991,401	$2,063,811	15.96 %	$565,481						History of Driehaus Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Expo Capital Management Llc	Institution	135,000	New Holding	135,000	100 %	$4,549,500	$5,275,800	$726,300	15.96 %	$726,300						History of Expo Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Fifth Third Asset Management Inc	Institution	204,190	Sold Some	-11,690	-5.41 %	$6,881,203	$7,979,745	$1,098,542	15.96 %	$-62,892						History of Fifth Third Asset Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Fifth Third Bancorp	Institution	51,552	Added More	4,880	10.45 %	$1,737,302	$2,014,652	$277,350	15.96 %	$26,254						History of Fifth Third Bancorp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Fifth Third Securitie	Institution	970	Sold Some	-487	-33.42 %	$32,689	$37,908	$5,219	15.96 %	$-2,620						History of Fifth Third Securitie Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Fort Washington Investment Advisors Inc	Institution	254,775	New Holding	254,775	100 %	$8,585,918	$9,956,607	$1,370,690	15.96 %	$1,370,690						History of Fort Washington Investment Advisors Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Galleon Management L P	Institution	20,000	New Holding	20,000	100 %	$674,000	$781,600	$107,600	15.96 %	$107,600						History of Galleon Management L P Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Gartmore Mutual Fund Capital Trust	Institution	134,716	Added More	38,861	40.54 %	$4,539,929	$5,264,701	$724,772	15.96 %	$209,072						History of Gartmore Mutual Fund Capital Trust Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	General Re New England Asset Management Inc	Institution	870	New Holding	870	100 %	$29,319	$34,000	$4,681	15.96 %	$4,681						History of General Re New England Asset Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Geode Capital Management Llc	Institution	165,091	Added More	13,392	8.82 %	$5,563,567	$6,451,756	$888,190	15.96 %	$72,049						History of Geode Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Hambrecht And Quist Capital Management Llc	Institution	300,800	Added More	23,100	8.31 %	$10,136,960	$11,755,264	$1,618,304	15.96 %	$124,278						History of Hambrecht And Quist Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Harris Financial Corp	Institution	24,870	Added More	1,600	6.87 %	$838,119	$971,920	$133,801	15.96 %	$8,608						History of Harris Financial Corp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Haw D E And Co Inc	Institution	112,493	Sold Some	-196,293	-63.56 %	$3,791,014	$4,396,226	$605,212	15.96 %	$-1,056,056						History of Haw D E And Co Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Igma Capital Management Llc	Institution	185,000	Added More	53,000	40.15 %	$6,234,500	$7,229,800	$995,300	15.96 %	$285,140						History of Igma Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Janus Capital Management Llc	Institution	1,014,219	Added More	137,035	15.62 %	$34,179,180	$39,635,679	$5,456,498	15.96 %	$737,248						History of Janus Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Jennison Associates Llc	Institution	471,000	Sold Some	-107,800	-18.62 %	$15,872,700	$18,406,680	$2,533,980	15.96 %	$-579,964						History of Jennison Associates Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Leuthold Weeden Capital Management Llc	Institution	421,435	Sold Some	-8,784	-2.04 %	$14,202,360	$16,469,680	$2,267,320	15.96 %	$-47,258						History of Leuthold Weeden Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Loomis Sayles And Co L P	Institution	124,756	Added More	12,652	11.28 %	$4,204,277	$4,875,464	$671,187	15.96 %	$68,068						History of Loomis Sayles And Co L P Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Lord Abbett And Co Llc	Institution	551,727	Sold Some	-155,708	-22.01 %	$18,593,200	$21,561,491	$2,968,291	15.96 %	$-837,709						History of Lord Abbett And Co Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	N-Q	Met Investors Series Trust-Lazard Mid Cap Portfolio	Mid-Cap Core	89,000	No Change	0	0 %	$2,999,300	$3,478,120	$478,820	15.96 %	$0						History of Met Investors Series Trust-Lazard Mid Cap Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	N-Q	Met Investors Series Trust-Turner Mid Cap Growth Portfolio	Mid-Cap Growth	96,890	Sold Some	-4,590	-4.52 %	$3,265,193	$3,786,461	$521,268	15.96 %	$-24,694						History of Met Investors Series Trust-Turner Mid Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Millennium Management Llc	Institution	152,300	Sold Some	-556,254	-78.50 %	$5,132,510	$5,951,884	$819,374	15.96 %	$-2,992,647						History of Millennium Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Morgan Stanley	Institution	1,140,324	Sold Some	-67,916	-5.62 %	$38,428,919	$44,563,862	$6,134,943	15.96 %	$-365,388						History of Morgan Stanley Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Nomura Asset Management Co Ltd	Institution	137,800	Added More	26,000	23.25 %	$4,643,860	$5,385,224	$741,364	15.96 %	$139,880						History of Nomura Asset Management Co Ltd Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Northern Trust Corp	Institution	782,171	Added More	89,243	12.87 %	$26,359,163	$30,567,243	$4,208,080	15.96 %	$480,127						History of Northern Trust Corp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Northwestern Mutual Wealth Management Co	Institution	2,610	Sold Some	-421	-13.88 %	$87,957	$101,999	$14,042	15.96 %	$-2,265						History of Northwestern Mutual Wealth Management Co Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Oberweis Asset Management Inc	Institution	21,430	Sold Some	-10,280	-32.41 %	$722,191	$837,484	$115,293	15.96 %	$-55,306						History of Oberweis Asset Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Old Mutual Asset Managers Uk Ltd	Institution	16,800	New Holding	16,800	100 %	$566,160	$656,544	$90,384	15.96 %	$90,384						History of Old Mutual Asset Managers Uk Ltd Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Onar Capital Management Llc	Institution	43,000	New Holding	43,000	100 %	$1,449,100	$1,680,440	$231,340	15.96 %	$231,340						History of Onar Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Orbimed Advisors Llc	Institution	1,128,500	Added More	1,012,900	876.21 %	$38,030,450	$44,101,780	$6,071,330	15.96 %	$5,449,402						History of Orbimed Advisors Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Partner Fund Management Lp	Institution	259,987	Added More	177,126	213.76 %	$8,761,562	$10,160,292	$1,398,730	15.96 %	$952,938						History of Partner Fund Management Lp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Partner Investment Management Lp	Institution	165,300	Added More	113,854	221.30 %	$5,570,610	$6,459,924	$889,314	15.96 %	$612,535						History of Partner Investment Management Lp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Pequot Capital Management Inc	Institution	409,200	No Change	0	0 %	$13,790,040	$15,991,536	$2,201,496	15.96 %	$0						History of Pequot Capital Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Perimeter Capital Partners Llc	Institution	178,642	Added More	13,520	8.18 %	$6,020,235	$6,981,329	$961,094	15.96 %	$72,738						History of Perimeter Capital Partners Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Polar Capital Llp	Institution	53,800	No Change	0	0 %	$1,813,060	$2,102,504	$289,444	15.96 %	$0						History of Polar Capital Llp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Principled Asset Administration Llc	Institution	248,600	Sold Some	-296,700	-54.41 %	$8,377,820	$9,715,288	$1,337,468	15.96 %	$-1,596,246						History of Principled Asset Administration Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Rafferty Asset Management Llc	Institution	26,612	Added More	10,897	69.34 %	$896,824	$1,039,997	$143,173	15.96 %	$58,626						History of Rafferty Asset Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Rainier Investment Management Inc	Institution	401,825	New Holding	401,825	100 %	$13,541,503	$15,703,321	$2,161,819	15.96 %	$2,161,819						History of Rainier Investment Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR/A	Redwood Investments Llc	Institution	62,830	Sold Some	-18,850	-23.07 %	$2,117,371	$2,455,396	$338,025	15.96 %	$-101,413						History of Redwood Investments Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Russell Frank Co	Institution	619,605	Added More	155,353	33.46 %	$20,880,689	$24,214,163	$3,333,475	15.96 %	$835,799						History of Russell Frank Co Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Sac Capital Advisors Lp	No Data	300,000	No Compare			$10,110,000	$11,724,000	$1,614,000	15.96 %							History of Sac Capital Advisors Lp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Thales Fund Management Llc	Institution	800	New Holding	800	100 %	$26,960	$31,264	$4,304	15.96 %	$4,304						History of Thales Fund Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Tryphon Capital Advisers Inc	Institution	146,915	New Holding	146,915	100 %	$4,951,036	$5,741,438	$790,403	15.96 %	$790,403						History of Tryphon Capital Advisers Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Two Sigma Investments Llc	Institution	187,557	Added More	150,999	413.03 %	$6,320,671	$7,329,728	$1,009,057	15.96 %	$812,375						History of Two Sigma Investments Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Ubs Ag	Institution	182,574	Added More	780	0.42 %	$6,152,744	$7,134,992	$982,248	15.96 %	$4,196						History of Ubs Ag Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Ubs Global Asset Management Americas Inc	Institution	323,600	Added More	25,400	8.51 %	$10,905,320	$12,646,288	$1,740,968	15.96 %	$136,652						History of Ubs Global Asset Management Americas Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Usquehanna International Group Llp	Institution	234,722	Sold Some	-20,105	-7.88 %	$7,910,131	$9,172,936	$1,262,804	15.96 %	$-108,165						History of Usquehanna International Group Llp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR/A	Vanguard Group Inc	Institution	2,609,850	Added More	145,142	5.88 %	$87,951,945	$101,992,938	$14,040,993	15.96 %	$780,864						History of Vanguard Group Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Wellington Management Co Llp	Institution	225,201	Sold Some	-540,690	-70.59 %	$7,589,274	$8,800,855	$1,211,581	15.96 %	$-2,908,912						History of Wellington Management Co Llp Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	World Asset Management Inc	Institution	10,149	Added More	416	4.27 %	$342,021	$396,623	$54,602	15.96 %	$2,238						History of World Asset Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-15	2009-03-31	13F-HR	Zacks Investment Management	Institution	16,081	Sold Some	-2,676	-14.26 %	$541,930	$628,445	$86,516	15.96 %	$-14,397						History of Zacks Investment Management Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Aronson And Johnson And Ortiz Lp	Institution	41,100	No Change	0	0 %	$1,344,792	$1,606,188	$261,396	19.43 %	$0						History of Aronson And Johnson And Ortiz Lp Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Barclays Global Investors Uk Holdings Ltd	Institution	4,342,986	Sold Some	-41,494	-0.94 %	$142,102,502	$169,723,893	$27,621,391	19.43 %	$-263,902						History of Barclays Global Investors Uk Holdings Ltd Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Bennett Lawrence Management L L C	Institution	163,350	Added More	44,150	37.03 %	$5,344,812	$6,383,718	$1,038,906	19.43 %	$280,794						History of Bennett Lawrence Management L L C Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Bnp Paribas Arbitrage Sa	Institution	11,993	New Holding	11,993	100 %	$392,411	$468,686	$76,275	19.43 %	$76,275						History of Bnp Paribas Arbitrage Sa Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Capital Fund Management S A	Institution		Sold All	-800	-100 %				19.43 %	$-5,088						History of Capital Fund Management S A Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Credit Suisse First Boston	Institution	42,421	No Compare			$1,388,015	$1,657,813	$269,798	19.43 %							History of Credit Suisse First Boston Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	First Mercantile Trust Co	Institution	937,734	Added More	80,031	9.33 %	$30,682,656	$36,646,645	$5,963,988	19.43 %	$508,997						History of First Mercantile Trust Co Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Goldman Sachs Group Inc	Institution	369,195	Sold Some	-394,429	-51.65 %	$12,080,060	$14,428,141	$2,348,080	19.43 %	$-2,508,568						History of Goldman Sachs Group Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Hillsdale Investment Management Inc	Institution	1,000	Sold Some	-400	-28.57 %	$32,720	$39,080	$6,360	19.43 %	$-2,544						History of Hillsdale Investment Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Investec Asset Management Ltd	Institution	380,730	Sold Some	-838	-0.21 %	$12,457,486	$14,878,928	$2,421,443	19.43 %	$-5,330						History of Investec Asset Management Ltd Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Jacobs Levy Equity Management Inc	Institution		Sold All	-7,900	-100 %				19.43 %	$-50,244						History of Jacobs Levy Equity Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	N-Q	Mainstay Vp Series Fund Inc-Vp Mid Cap Growth Portfolio	Mid-Cap Growth	39,600	New Holding	39,600	100 %	$1,295,712	$1,547,568	$251,856	19.43 %	$251,856						History of Mainstay Vp Series Fund Inc-Vp Mid Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	N-Q	Mainstay Vp Series Fund Inc-Vp Small Cap Growth Portfolio	Small-Cap Growth	31,700	Added More	5,100	19.17 %	$1,037,224	$1,238,836	$201,612	19.43 %	$32,436						History of Mainstay Vp Series Fund Inc-Vp Small Cap Growth Portfolio Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Martingale Asset Management L P	Institution	39,132	Added More	826	2.15 %	$1,280,399	$1,529,279	$248,880	19.43 %	$5,253						History of Martingale Asset Management L P Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Next Century Growth Investors Llc	Institution	153,588	Added More	19,248	14.32 %	$5,025,399	$6,002,219	$976,820	19.43 %	$122,417						History of Next Century Growth Investors Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Pioneer Investment Management Inc	Institution	367,877	Sold Some	-6,451	-1.72 %	$12,036,935	$14,376,633	$2,339,698	19.43 %	$-41,028						History of Pioneer Investment Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Price T Rowe Associates Inc	Institution	6,438,140	Sold Some	-266,460	-3.97 %	$210,655,941	$251,602,511	$40,946,570	19.43 %	$-1,694,686						History of Price T Rowe Associates Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Profund Advisors Llc	Institution	17,640	Sold Some	-7,736	-30.48 %	$577,181	$689,371	$112,190	19.43 %	$-49,201						History of Profund Advisors Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Proshare Advisors Llc	Institution	41,629	Added More	8,419	25.35 %	$1,362,101	$1,626,861	$264,760	19.43 %	$53,545						History of Proshare Advisors Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Provident Investment Counsel	Institution	187,929	Added More	154,840	467.95 %	$6,149,037	$7,344,265	$1,195,228	19.43 %	$984,782						History of Provident Investment Counsel Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Rbc Dain Rauscher Inc	Institution	2,887	Sold Some	-49,977	-94.53 %	$94,463	$112,824	$18,361	19.43 %	$-317,854						History of Rbc Dain Rauscher Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Renaissance Technologies Corp	Institution	243,876	Added More	36,600	17.65 %	$7,979,623	$9,530,674	$1,551,051	19.43 %	$232,776						History of Renaissance Technologies Corp Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Rodney Square Management Corp	Institution	6,850	Added More	1,200	21.23 %	$224,132	$267,698	$43,566	19.43 %	$7,632						History of Rodney Square Management Corp Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Roxbury Capital Management	Institution		Sold All	-454,560	-100 %				19.43 %	$-2,891,002						History of Roxbury Capital Management Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Royal Bank Of Canada	Institution	155	Sold Some	-90	-36.73 %	$5,072	$6,057	$986	19.43 %	$-572						History of Royal Bank Of Canada Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Royal Bank Of Scotland Group Plc	Institution	16,330	Added More	47	0.28 %	$534,318	$638,176	$103,859	19.43 %	$299						History of Royal Bank Of Scotland Group Plc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Ubs Oconnor Llc	Institution	152,118	New Holding	152,118	100 %	$4,977,301	$5,944,771	$967,470	19.43 %	$967,470						History of Ubs Oconnor Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Us Bancorp De	Institution	3,802	Sold Some	-1,293	-25.37 %	$124,401	$148,582	$24,181	19.43 %	$-8,223						History of Us Bancorp De Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Westfield Capital Management Co Llc	Institution	3,323,576	Sold Some	-427,835	-11.40 %	$108,747,407	$129,885,350	$21,137,943	19.43 %	$-2,721,031						History of Westfield Capital Management Co Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-14	2009-03-31	13F-HR	Wexford Capital Llc	Institution	33,132	Added More	3,100	10.32 %	$1,084,079	$1,294,799	$210,720	19.43 %	$19,716						History of Wexford Capital Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	American Century Companies Inc	Institution	1,744,065	Added More	64,294	3.82 %	$58,705,228	$68,158,060	$9,452,832	16.10 %	$348,473						History of American Century Companies Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Barclays Plc	Institution	67,734	Sold Some	-147,283	-68.49 %	$2,279,926	$2,647,045	$367,118	16.10 %	$-798,274						History of Barclays Plc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Commonwealth Of Pennsylvania Public School Empls Retrmt Sy	Institution		Sold All	-81,930	-100 %				16.10 %	$-444,061						History of Commonwealth Of Pennsylvania Public School Empls Retrmt Sy Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR/A	Duquesne Capital Management L L C	Institution	25,000	New Holding	25,000	100 %	$841,500	$977,000	$135,500	16.10 %	$135,500						History of Duquesne Capital Management L L C Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	First Quadrant L P	Institution	95,990	Added More	56,150	140.93 %	$3,231,023	$3,751,289	$520,266	16.10 %	$304,333						History of First Quadrant L P Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Fortaleza Asset Management Inc	Institution	41,731	Added More	11,375	37.47 %	$1,404,665	$1,630,847	$226,182	16.10 %	$61,653						History of Fortaleza Asset Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Fortis Investments Management Usa Inc	Institution	134,600	New Holding	134,600	100 %	$4,530,636	$5,260,168	$729,532	16.10 %	$729,532						History of Fortis Investments Management Usa Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Globeflex Capital L P	Institution	43,300	Added More	500	1.16 %	$1,457,478	$1,692,164	$234,686	16.10 %	$2,710						History of Globeflex Capital L P Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Goodman And Company Investment Counsel Ltd	Institution	500,000	New Holding	500,000	100 %	$16,830,000	$19,540,000	$2,710,000	16.10 %	$2,710,000						History of Goodman And Company Investment Counsel Ltd Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Great West Life Assurance Co	Institution		Sold All	-56,000	-100 %				16.10 %	$-303,520						History of Great West Life Assurance Co Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Independent Portfolio Consultants Inc	No Data	8,680	New Holding	8,680	100 %	$292,169	$339,214	$47,046	16.10 %	$47,046						History of Independent Portfolio Consultants Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	J P Morgan Chase And Co	Institution	1,172,278	Sold Some	-44,177	-3.63 %	$39,458,877	$45,812,624	$6,353,747	16.10 %	$-239,439						History of J P Morgan Chase And Co Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Julius Baer Investment Management Llc	Institution	2,330	Sold Some	-570	-19.65 %	$78,428	$91,056	$12,629	16.10 %	$-3,089						History of Julius Baer Investment Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Marshall Ilsley Corp	Institution	125,804	No Compare			$4,234,563	$4,916,420	$681,858	16.10 %							History of Marshall Ilsley Corp Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Neuberger Berman Llc	Institution	381,700	Added More	150,200	64.88 %	$12,848,022	$14,916,836	$2,068,814	16.10 %	$814,084						History of Neuberger Berman Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Overeign Asset Management Corp	Institution	33,820	New Holding	33,820	100 %	$1,138,381	$1,321,686	$183,304	16.10 %	$183,304						History of Overeign Asset Management Corp Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Pier Capital Llc	Institution	26,416	New Holding	26,416	100 %	$889,163	$1,032,337	$143,175	16.10 %	$143,175						History of Pier Capital Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Rbc Asset Management Inc	Institution	21,000	No Change	0	0 %	$706,860	$820,680	$113,820	16.10 %	$0						History of Rbc Asset Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Rigel Capital Llc	Institution	16,970	Sold Some	-4,605	-21.34 %	$571,210	$663,188	$91,977	16.10 %	$-24,959						History of Rigel Capital Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Signaturefd Llc	No Data	20	No Change	0	0 %	$673	$782	$108	16.10 %	$0						History of Signaturefd Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Technical Financial Services Llc	Institution	14,275	New Holding	14,275	100 %	$480,497	$557,867	$77,371	16.10 %	$77,371						History of Technical Financial Services Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Tokum Capital Management Lp	Institution	95,167	Added More	16,984	21.72 %	$3,203,321	$3,719,126	$515,805	16.10 %	$92,053						History of Tokum Capital Management Lp Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Uffolk Capital Management Llc	Institution	14,000	Sold Some	-9,000	-39.13 %	$471,240	$547,120	$75,880	16.10 %	$-48,780						History of Uffolk Capital Management Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-13	2009-03-31	13F-HR	Untrust Banks Inc	Institution	173,021	Sold Some	-14,209	-7.58 %	$5,823,887	$6,761,661	$937,774	16.10 %	$-77,013						History of Untrust Banks Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-05-11	4	Keiser David W	Insider	159,546	Sold Some	-7,800	-4.66 %	$5,539,437	$6,235,058	$695,621	12.55 %	$-34,008	X					History of Keiser David W Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-03-31	13F-HR	Ameriprise Financial Inc	Institution	193,670	Added More	26,330	15.73 %	$6,724,222	$7,568,624	$844,401	12.55 %	$114,799						History of Ameriprise Financial Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-03-31	13F-HR	Bbt Capital Management Inc	Institution	240,000	Added More	65,000	37.14 %	$8,332,800	$9,379,200	$1,046,400	12.55 %	$283,400						History of Bbt Capital Management Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-03-31	13F-HR	Columbia Wanger Asset Management Lp	Institution	4,083,700	Sold Some	-7,400	-0.18 %	$141,786,064	$159,590,996	$17,804,932	12.55 %	$-32,264						History of Columbia Wanger Asset Management Lp Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-03-31	13F-HR	Comerica Bank	Institution	13,105	Added More	1,355	11.53 %	$455,006	$512,143	$57,138	12.55 %	$5,908						History of Comerica Bank Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-03-31	13F-HR	Federated Investors Inc	Institution	49,706	Sold Some	-88,214	-63.96 %	$1,725,792	$1,942,510	$216,718	12.55 %	$-384,613						History of Federated Investors Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-03-31	13F-HR	Franklin Resources Inc	Institution	64,600	Sold Some	-29,700	-31.49 %	$2,242,912	$2,524,568	$281,656	12.55 %	$-129,492						History of Franklin Resources Inc Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-03-31	13F-HR	G Americas Securities Llc	Institution		Sold All	-21,052	-100 %				12.55 %	$-91,787						History of G Americas Securities Llc Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-03-31	13F-HR	Hartford Investment Management Co	Institution	163,407	Added More	17,650	12.10 %	$5,673,491	$6,385,946	$712,455	12.55 %	$76,954						History of Hartford Investment Management Co Ownership Of Alexion Pharmaceuticals Inc
2009-05-12	2009-03-31	13F-H