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ALEXION PHARMACEUTICALS INC CO
(015351109)

Funds Reporting Holdings of ALEXION PHARMACEUTICALS INC CO according to 13F filings
Firm Name Shares Held / Principal Amount Market Value Option Report Period Effectiveness Date
Baker BROS Advisors LP 8,258,068 $1,081,642k Jun 30, 2019 Aug 14, 2019
Artisan Partners Limited Partnership 5,027,064 $658,445k Jun 30, 2019 Aug 9, 2019
Orbimed Advisors LLC 1,926,085 $252,279k Jun 30, 2019 Aug 14, 2019
Investec Asset Management Limited 648,507 $221,245k Jun 30, 2019 Jul 30, 2019
Renaissance Technologies LLC 1,642,542 $215,140k Jun 30, 2019 Aug 12, 2019
Cantab Capital Partners LLP 1,378 $193,000k Sep 30, 2017 Nov 14, 2017
PALO ALTO Investors LP 1,023,780 $134,095k Jun 30, 2019 Aug 14, 2019
Janus Capital Management LLC 933,211 $113,137k Mar 31, 2017 May 16, 2017
Managed Account Advisors LLC 604,494 $109,274k Jun 30, 2015 Aug 14, 2015
Polar Capital LLP 678,592 $88,882k Jun 30, 2019 Aug 14, 2019
Calamos Advisors LLC 649,223 $85,035k Jun 30, 2019 Aug 7, 2019
Candriam Luxembourg SCA 565,233 $73,709k Jun 30, 2019 Aug 1, 2019
Miller Value Partners LLC 448,780 $58,781k Jun 30, 2019 Aug 14, 2019
Tekla Capital Management LLC 400,014 $52,394k Jun 30, 2019 Aug 14, 2019
Camber Capital Management LP 400,000 $52,392k Jun 30, 2019 Aug 14, 2019
Eulav Asset Management 262,200 $34,343k Jun 30, 2019 Aug 5, 2019
1919 Investment Counsel LLC 193,772 $32,132k Sep 30, 2014 Nov 14, 2014
Rock Springs Capital Management LP 242,500 $31,763k Jun 30, 2019 Aug 14, 2019
Signature Estate & Investment Advisors LLC 198,002 $25,934k Jun 30, 2019 Aug 1, 2019
Peregrine Capital Management LLC 165,886 $21,728k Jun 30, 2019 Jul 18, 2019
Taurus Asset Management LLC 149,385 $19,566k Jun 30, 2019 Aug 14, 2019
Adams Diversified Equity Fund Inc 146,700 $19,215k Jun 30, 2019 Jul 29, 2019
van ECK Associates Corporation 130,965 $17,154k Jun 30, 2019 Aug 7, 2019
Asset Management One Co Ltd 127,762 $16,734k Jun 30, 2019 Aug 14, 2019
Thornburg Investment Management Inc 97,600 $12,784k Jun 30, 2019 Aug 6, 2019
Clearbridge Investments LLC 119,295 $11,615k Dec 31, 2018 Feb 14, 2019
Premier Asset Management LLC 88,210 $11,553k Jun 30, 2019 Aug 7, 2019
Summit Partners Public Asset Management LLC 85,000 $11,133k Jun 30, 2019 Aug 14, 2019
FRED Alger Management Inc 82,343 $10,785k Jun 30, 2019 Aug 14, 2019
PDT Partners LLC 79,500 $10,413k Jun 30, 2019 Aug 14, 2019
Stevens Capital Management LP 76,820 $10,062k Jun 30, 2019 Jul 31, 2019
Sectoral Asset Management Inc 73,199 $9,588k Jun 30, 2019 Aug 14, 2019
ZWJ Investment Counsel Inc 71,977 $9,428k Jun 30, 2019 Jul 24, 2019
SIO Capital Management LLC 71,521 $9,368k Jun 30, 2019 Aug 14, 2019
Channing Capital Management LLC 71,288 $9,337k Jun 30, 2019 Aug 14, 2019
Origin Asset Management LLP 69,700 $9,129k Jun 30, 2019 Aug 9, 2019
Granite Investment Partners LLC 68,127 $8,923k Jun 30, 2019 Aug 7, 2019
Granite Financial Partners LLC 68,127 $8,923k Jun 30, 2019 Aug 7, 2019
Numeric Investors LLC 73,700 $8,814k Dec 31, 2017 Feb 14, 2018
Altrinsic Global Advisors LLC 65,000 $8,514k Jun 30, 2019 Aug 14, 2019
GLG LLC 64,133 $7,670k Dec 31, 2017 Feb 14, 2018
Oak Ridge Investments LLC 57,581 $7,542k Jun 30, 2019 Aug 14, 2019
Hudson BAY Capital Management LP 55,000 $7,204k Jun 30, 2019 Aug 14, 2019
Magnetar Financial LLC 54,600 $7,152k Jun 30, 2019 Aug 14, 2019
Partners Capital Investment Group LLP 51,880 $6,795k Jun 30, 2019 Aug 12, 2019
Gabelli Funds LLC 51,000 $6,680k Jun 30, 2019 Aug 2, 2019
Sterling Capital Management LLC 50,090 $6,561k Jun 30, 2019 Aug 14, 2019
Arrowgrass Capital Partners US LP 50,000 $6,549k Put Jun 30, 2019 Aug 14, 2019
Congress Asset Management Company LLP 45,955 $6,019k Jun 30, 2019 Aug 7, 2019
DSC Advisors LP 45,000 $5,894k Jun 30, 2019 Aug 14, 2019
Point72 Asset Management LP 43,882 $5,748k Jun 30, 2019 Aug 14, 2019
ICON Advisers Inc 40,633 $5,322k Jun 30, 2019 Aug 2, 2019
Salem Investment Counselors Inc 37,950 $4,971k Jun 30, 2019 Aug 14, 2019
Pacer Advisors Inc 36,552 $4,788k Jun 30, 2019 Aug 12, 2019
Tokio Marine Asset Management USA Ltd 36,512 $4,782k Jun 30, 2019 Jul 25, 2019
Stralem & Company Incorporated 36,155 $4,736k Jun 30, 2019 Jul 16, 2019
Boston Advisors LLC 33,142 $4,341k Jun 30, 2019 Jul 30, 2019
Twin Capital Management Inc 31,200 $4,087k Jun 30, 2019 Aug 1, 2019
Bridgewater Associates LP 30,241 $3,961k Jun 30, 2019 Aug 13, 2019
Systematic Financial Management LP 29,058 $3,806k Jun 30, 2019 Jul 26, 2019
Calamos Wealth Management LLC 28,093 $3,680k Jun 30, 2019 Aug 7, 2019
First Light Asset Management LLC 26,920 $3,526k Jun 30, 2019 Aug 14, 2019
Meridian Wealth Management LLC 2,372 $3,107k Jun 30, 2019 Jul 19, 2019
Panagora Asset Management Inc 23,639 $3,096k Jun 30, 2019 Aug 9, 2019
Stephens Investment Management Group LLC 23,636 $3,096k Jun 30, 2019 Aug 1, 2019
Cornercap Investment Counsel Inc 23,505 $3,079k Jun 30, 2019 Aug 14, 2019
Nippon Life Global Investors Americas Inc 23,300 $3,052k Jun 30, 2019 Jul 23, 2019
LMR Partners LLC 22,295 $2,920k Jun 30, 2019 Aug 14, 2019
Quantitative Investment Management LLC 21,262 $2,784k Jun 30, 2019 Aug 14, 2019
Verition Fund Management LLC 21,234 $2,781k Jun 30, 2019 Aug 14, 2019
Morris Capital Advisors Inc 19,625 $2,570k Jun 30, 2019 Jul 15, 2019
ODEY Asset Management LLP 18,898 $2,475k Jun 30, 2019 Aug 14, 2019
Laurion Capital Management LP 17,929 $2,348k Jun 30, 2019 Aug 13, 2019
EQIS Capital Management Inc 17,732 $2,323k Jun 30, 2019 Jul 18, 2019
IFM Investors PTY Ltd 15,994 $2,095k Jun 30, 2019 Jul 16, 2019
Tealwood Asset Management Inc 15,792 $2,068k Jun 30, 2019 Aug 6, 2019
Dupont Capital Management Corp 15,444 $2,023k Jun 30, 2019 Jul 30, 2019
Piedmont Investment Advisors Inc 15,299 $2,004k Jun 30, 2019 Aug 14, 2019
World Asset Management Inc 14,813 $1,940k Jun 30, 2019 Jul 23, 2019
Pinnacle Associates Ltd 14,200 $1,860k Jun 30, 2019 Aug 5, 2019
Altman Advisors Inc 13,754 $1,801k Jun 30, 2019 Jul 12, 2019
Richard Bernstein Advisors LLC 13,199 $1,728k Jun 30, 2019 Aug 9, 2019
Oakbrook Investments LLC 12,225 $1,601k Jun 30, 2019 Jul 18, 2019
Prelude Capital Management LLC 11,843 $1,551k Jun 30, 2019 Aug 14, 2019
Vision Capital Management Corporation 10,482 $1,373k Jun 30, 2019 Jul 29, 2019
Vision Capital Management Inc 10,482 $1,373k Jun 30, 2019 Jul 29, 2019
Patton Albertson Miller Group LLC 12,032 $1,323k Jun 30, 2019 Aug 12, 2019
Hussman Strategic Advisors Inc 10,000 $1,310k Jun 30, 2019 Jul 31, 2019
Gateway Investment Advisers LLC 9,402 $1,231k Jun 30, 2019 Jul 17, 2019
QS Investors LLC 9,242 $1,211k Jun 30, 2019 Aug 14, 2019
GLG Partners LP 9,602 $1,148k Dec 31, 2017 Feb 14, 2018
HIGH Pointe Capital Management LLC 8,700 $1,140k Jun 30, 2019 Aug 12, 2019
Schonfeld Strategic Advisors LLC 8,678 $1,136k Jun 30, 2019 Aug 14, 2019
Wilmington Funds Management Corporation 6,440 $1,006k Jun 30, 2014 Aug 13, 2014
Cambridge Investment Research Advisors Inc 7,504 $983k Jun 30, 2019 Aug 15, 2019
Gideon Capital Advisors Inc 7,290 $955k Jun 30, 2019 Aug 14, 2019
MAI Capital Management LLC 7,061 $925k Jun 30, 2019 Aug 15, 2019
Kovitz Investment Group Partners LLC 6,068 $794k Jun 30, 2019 Aug 14, 2019
Wilmington Trust Investment Management LLC 4,900 $766k Jun 30, 2014 Aug 13, 2014
Level Four Advisory Services LLC 5,528 $723k Jun 30, 2019 Aug 14, 2019
Landscape Capital Management LLC 5,435 $712k Jun 30, 2019 Aug 8, 2019
Veritable LP 5,164 $676k Jun 30, 2019 Aug 12, 2019
Weiss Multi-Strategy Advisers LLC 5,000 $655k Jun 30, 2019 Aug 14, 2019
Sentry Management Inc 4,934 $646k Jun 30, 2019 Aug 12, 2019
Sentry Investment Management LLC 4,934 $646k Jun 30, 2019 Aug 12, 2019
Grandfield & DODD LLC 4,460 $584k Jun 30, 2019 Jul 29, 2019
United Asset Strategies Inc 11,497 $567k Jun 30, 2019 Jul 31, 2019
Aristotle Atlantic Partners LLC 4,176 $547k Jun 30, 2019 Aug 13, 2019
Wetherby Asset Management 4,077 $534k Jun 30, 2019 Jul 25, 2019
Global X Management Company LLC 4,280 $531k Jun 30, 2018 Aug 16, 2018
American National Registered Investment Advisor Inc 3,640 $477k Jun 30, 2019 Aug 5, 2019
Atria Investments LLC 4,311 $470k Jun 30, 2019 Aug 26, 2019
Bienville Capital Management LLC 3,421 $448k Jun 30, 2019 Aug 14, 2019
Conning Inc 3,390 $444k Jun 30, 2019 Jul 25, 2019
Cleararc Capital Inc 3,329 $436k Jun 30, 2019 Aug 7, 2019
ETF Managers Group LLC 3,204 $404k Jun 30, 2019 Aug 14, 2019
The Colony Group LLC 2,960 $388k Jun 30, 2019 Aug 19, 2019
Pillar Pacific Capital Management LLC 2,795 $366k Jun 30, 2019 Aug 7, 2019
Advisor Partners LLC 2,338 $306k Jun 30, 2019 Jul 26, 2019
Mckinley Carter Wealth Services Inc 2,300 $301k Jun 30, 2019 Aug 2, 2019
Chicago Equity Partners LLC 2,220 $291k Jun 30, 2019 Aug 2, 2019
Miles Capital Inc 2,059 $270k Jun 30, 2019 Aug 13, 2019
Campbell & Company Investment Adviser LLC 2,018 $264k Jun 30, 2019 Jul 10, 2019
Madison Investment Holdings Inc 1,965 $257k Jun 30, 2019 Aug 13, 2019
Ziegler Capital Management LLC 1,955 $227k Sep 30, 2013 Nov 6, 2013
Driehaus Capital Management LLC 1,565 $205k Jun 30, 2019 Aug 14, 2019
OFI Advisors LLC 1,212 $190k Sep 30, 2015 Nov 16, 2015
Advantage Investment Management LLC 1,093 $143k Jun 30, 2019 Jul 30, 2019
Shine Investment Advisory Services Inc 897 $117k Jun 30, 2019 Jul 25, 2019
Prime Capital Investment Advisors LLC 550 $72k Jun 30, 2019 Aug 6, 2019
Kaizen Advisory LLC 610 $59k Dec 31, 2018 Feb 15, 2019
Capital Bank and Trust Company 269 $35k Jun 30, 2019 Aug 14, 2019
Pathstone Family Office LLC 230 $30k Jun 30, 2019 Aug 14, 2019
Maytech Global Investments LLC 200 $26k Jun 30, 2019 Aug 12, 2019
Hudock Capital Group LLC 182 $23k Jun 30, 2019 Jul 30, 2019
MARK Sheptoff Financial Planning LLC 150 $20k Jun 30, 2019 Aug 12, 2019
RPG Investment Advisory LLC 125 $16k Jun 30, 2019 Jul 10, 2019
CSAT Investment Advisory LP 97 $13k Jun 30, 2019 Aug 15, 2019
FNY Investment Advisers LLC 100 $13k Jun 30, 2019 Jul 24, 2019
Hexavest Inc 77 $10k Jun 30, 2019 Jul 10, 2019
Loring Wolcott & Coolidge Fiduciary Advisors LLP 46 $6k Jun 30, 2019 Aug 9, 2019
HOWE and Rusling Inc 35 $5k Jun 30, 2019 Aug 12, 2019
Litman Gregory Asset Management LLC 30 $4k Jun 30, 2019 Jul 31, 2019
Rational Advisors Inc 28 $4k Jun 30, 2019 Aug 8, 2019
James Investment Research Inc 21 $3k Jun 30, 2019 Jul 24, 2019
Hilton Capital Management LLC 20 $3k Jun 30, 2019 Aug 14, 2019
Sonora Investment Management LLC 20 $3k Jun 30, 2019 Jul 19, 2019
Winch Advisory Services LLC 19 $2k Jun 30, 2019 Aug 7, 2019
Kayne Anderson Rudnick Investment Management LLC 4 $1k Jun 30, 2019 Aug 14, 2019

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