0001144204-15-038941.txt : 20150624 0001144204-15-038941.hdr.sgml : 20150624 20150624190355 ACCESSION NUMBER: 0001144204-15-038941 CONFORMED SUBMISSION TYPE: 3 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20150622 FILED AS OF DATE: 20150624 DATE AS OF CHANGE: 20150624 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: ALEXION PHARMACEUTICALS INC CENTRAL INDEX KEY: 0000899866 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 133648318 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 352 KNOTTER DRIVE CITY: CHESHIRE STATE: CT ZIP: 06511 BUSINESS PHONE: 2037761790 MAIL ADDRESS: STREET 1: 352 KNOTTER DRIVE CITY: CHESHIRE STATE: CT ZIP: 06511 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Baker Brothers Life Sciences LP CENTRAL INDEX KEY: 0001363364 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 000-27756 FILM NUMBER: 15950258 BUSINESS ADDRESS: STREET 1: 667 MADISON AVENUE STREET 2: 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 BUSINESS PHONE: 212-339-5633 MAIL ADDRESS: STREET 1: 667 MADISON AVENUE STREET 2: 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Baker Bros. Advisors (GP) LLC CENTRAL INDEX KEY: 0001580575 STATE OF INCORPORATION: E9 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 000-27756 FILM NUMBER: 15950260 BUSINESS ADDRESS: STREET 1: 667 MADISON AVENUE STREET 2: 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 BUSINESS PHONE: (212)339-5600 MAIL ADDRESS: STREET 1: 667 MADISON AVENUE STREET 2: 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: BAKER BROS. ADVISORS LP CENTRAL INDEX KEY: 0001263508 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 000-27756 FILM NUMBER: 15950261 BUSINESS ADDRESS: STREET 1: 667 MADISON AVE STREET 2: 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 BUSINESS PHONE: 2123395600 MAIL ADDRESS: STREET 1: 667 MADISON AVE STREET 2: 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 FORMER NAME: FORMER CONFORMED NAME: BAKER BROS ADVISORS LLC DATE OF NAME CHANGE: 20030911 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: BAKER JULIAN CENTRAL INDEX KEY: 0001087939 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 000-27756 FILM NUMBER: 15950262 MAIL ADDRESS: STREET 1: BAKER BROTHERS ADVISORS STREET 2: 667 MADISON AVENUE, 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: BAKER FELIX CENTRAL INDEX KEY: 0001087940 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 000-27756 FILM NUMBER: 15950263 MAIL ADDRESS: STREET 1: BAKER BROTHERS ADVISORS STREET 2: 667 MADISON AVENUE, 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: 667, L.P. CENTRAL INDEX KEY: 0001551139 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 000-27756 FILM NUMBER: 15950259 BUSINESS ADDRESS: STREET 1: 667 MADISON AVE. STREET 2: 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 BUSINESS PHONE: 212-339-5600 MAIL ADDRESS: STREET 1: 667 MADISON AVE. STREET 2: 21ST FLOOR CITY: NEW YORK STATE: NY ZIP: 10065 3 1 form334230_20150624070114-.xml X0206 3 2015-06-22 1 0000899866 ALEXION PHARMACEUTICALS INC ALXN 0001087940 BAKER FELIX 667 MADISON AVENUE, 21ST FLOOR NEW YORK NY 10065 1 0 0 0 0001087939 BAKER JULIAN 667 MADISON AVENUE, 21ST FLOOR NEW YORK NY 10065 1 0 0 0 0001263508 BAKER BROS. ADVISORS LP 667 MADISON AVENUE, 21ST FLOOR NEW YORK NY 10065 1 0 0 0 0001580575 Baker Bros. Advisors (GP) LLC 667 MADISION AVENUE 21ST FLOOR NEW YORK NY 10065 1 0 0 0 0001551139 667, L.P. 667 MADISON AVENUE 21ST FLOOR NEW YORK NY 10065 1 0 0 0 0001363364 Baker Brothers Life Sciences LP 667 MADISON AVENUE, 21ST FLOOR NEW YORK NY 10065 1 0 0 0 Felix J. Baker is a director of Alexion Pharmaceuticals, Inc. (the "Issuer"). For purposes of Section 16 of the Securities Exchange Act of 1934, as amended the Reporting Persons other than Felix J. Baker are deemed directors by deputization by virtue of their representation on the Board of the Issuer. /s/ Felix J. Baker 2015-06-24 /s/ Julian C. Baker 2015-06-24 Baker Bros. Advisors LP Name: Scott L. Lessing, Title: President /s/ Scott L. Lessing 2015-06-24 Baker Bros. Advisors (GP) LLC, Name:Scott L. Lessing, Title: President /s/ Scott L. Lessing 2015-06-24 Baker Bros. Advisors LP, Mgmt. Co. and Inv. Adviser to 667, L.P., pursuant to authority granted by Baker Biotech Capital, L.P., GP to 667, L.P. Name: Scott L. Lessing, Title: President /s/ Scott L. Lessing 2015-06-24 Baker Bros. Advisors LP, Mgmt. Co. and Inv. Adviser to Baker Brothers Life Sciences, L.P., pursuant to authority granted by Baker Brothers Life Sciences Capital, L.P., GP to Baker Brothers Life Name: Scott L. Lessing, Title: President /s/ Scott L. Lessing 2015-06-24