Managing Member

0001172661-15-001629.txt : 20150814 0001172661-15-001629.hdr.sgml : 20150814 20150814141042 ACCESSION NUMBER: 0001172661-15-001629 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20150630 FILED AS OF DATE: 20150814 DATE AS OF CHANGE: 20150814 EFFECTIVENESS DATE: 20150814 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Atika Capital Management LLC CENTRAL INDEX KEY: 0001599731 IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-15941 FILM NUMBER: 151054745 BUSINESS ADDRESS: STREET 1: 3 COLUMBUS CIRCLE, 25TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10019 BUSINESS PHONE: 212-408-2700 MAIL ADDRESS: STREET 1: 3 COLUMBUS CIRCLE, 25TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10019 13F-HR 1 primary_doc.xml 13F-HR LIVE false true false 0001599731 XXXXXXXX 06-30-2015 06-30-2015 false Atika Capital Management LLC

3 Columbus Circle, 25th Floor New York NY 10019

13F HOLDINGS REPORT 028-15941 N Brad Farber Managing Member 212-408-2772 /s/ Brad Farber New York NY 08-14-2015 1 132 222090 1 0001568986 028-16711 Atika Capital Partners LP INFORMATION TABLE 2 infotable.xml ABBVIE INC COM 00287Y109 1244 18513 SH SOLE 18513 0 0 ABBVIE INC COM 00287Y109 2912 43337 SH DFND 1 43337 0 0 ABIOMED INC COM 003654100 2854 43417 SH DFND 1 43417 0 0 ABIOMED INC COM 003654100 1221 18583 SH SOLE 18583 0 0 ACADIA HEALTHCARE COMPANY IN COM 00404A109 2075 26485 SH DFND 1 26485 0 0 ACADIA HEALTHCARE COMPANY IN COM 00404A109 867 11065 SH SOLE 11065 0 0 ACADIA PHARMACEUTICALS INC COM 004225108 209 5000 SH Call SOLE 5000 0 0 ACADIA PHARMACEUTICALS INC COM 004225108 502 12000 SH Call DFND 1 12000 0 0 ADEPTUS HEALTH INC CL A 006855100 5987 63028 SH DFND 1 63028 0 0 ADEPTUS HEALTH INC CL A 006855100 2562 26972 SH SOLE 26972 0 0 AGIOS PHARMACEUTICALS INC COM 00847X104 491 4414 SH DFND 1 4414 0 0 AGIOS PHARMACEUTICALS INC COM 00847X104 171 1536 SH SOLE 1536 0 0 ALLERGAN PLC 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