0001172661-19-000782.txt : 20190214
0001172661-19-000782.hdr.sgml : 20190214
20190214144811
ACCESSION NUMBER: 0001172661-19-000782
CONFORMED SUBMISSION TYPE: 13F-HR
PUBLIC DOCUMENT COUNT: 2
CONFORMED PERIOD OF REPORT: 20181231
FILED AS OF DATE: 20190214
DATE AS OF CHANGE: 20190214
EFFECTIVENESS DATE: 20190214
FILER:
COMPANY DATA:
COMPANY CONFORMED NAME: Rock Springs Capital Management LP
CENTRAL INDEX KEY: 0001595725
IRS NUMBER: 800944416
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: 13F-HR
SEC ACT: 1934 Act
SEC FILE NUMBER: 028-16048
FILM NUMBER: 19604898
BUSINESS ADDRESS:
STREET 1: 650 SOUTH EXETER STREET
STREET 2: SUITE 1070
CITY: BALTIMORE
STATE: MD
ZIP: 21202
BUSINESS PHONE: 4102200129
MAIL ADDRESS:
STREET 1: 650 SOUTH EXETER STREET
STREET 2: SUITE 1070
CITY: BALTIMORE
STATE: MD
ZIP: 21202
13F-HR
1
primary_doc.xml
13F-HR
LIVE
false
true
false
0001595725
XXXXXXXX
12-31-2018
12-31-2018
false
Rock Springs Capital Management LP
650 South Exeter Street
Suite 1070
Baltimore
MD
21202
13F HOLDINGS REPORT
028-16048
N
Nnamdi Etoh
Controller
410-220-0129
/s/ Nnamdi Etoh
Baltimore
MD
02-14-2019
0
133
2118545
INFORMATION TABLE
2
infotable.xml
ACADIA HEALTHCARE COMPANY IN
COM
00404A109
23158
900750
SH
SOLE
900750
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0
ACHILLION PHARMACEUTICALS IN
COM
00448Q201
3697
2325000
SH
SOLE
2325000
0
0
ACLARIS THERAPEUTICS INC
COM
00461U105
9824
1329400
SH
SOLE
1329400
0
0
ADAPTIMMUNE THERAPEUTICS PLC
SPONDS ADR
00653A107
4313
750000
SH
SOLE
750000
0
0
AEGLEA BIOTHERAPEUTICS INC
COM
00773J103
4869
650000
SH
SOLE
650000
0
0
AGILENT TECHNOLOGIES INC
COM
00846U101
12332
182800
SH
SOLE
182800
0
0
ALDER BIOPHARMACEUTICALS INC
COM
014339105
15119
1475000
SH
SOLE
1475000
0
0
ALDER BIOPHARMACEUTICALS INC
NOTE 2.500% 2/0
014339AA3
4001
5000000
PRN
SOLE
5000000
0
0
ALEXION PHARMACEUTICALS INC
COM
015351109
23610
242500
SH
SOLE
242500
0
0
ALIGN TECHNOLOGY INC
COM
016255101
21990
105000
SH
SOLE
105000
0
0
ALLAKOS INC
COM
01671P100
21117
404000
SH
SOLE
404000
0
0
ALNYLAM PHARMACEUTICALS INC
COM
02043Q107
14145
194000
SH
SOLE
194000
0
0
AMARIN CORP PLC
SPONS ADR NEW
023111206
60918
4476000
SH
SOLE
4476000
0
0
AMICUS THERAPEUTICS INC
COM
03152W109
9580
1000000
SH
SOLE
1000000
0
0
ANAPTYSBIO INC
COM
032724106
8675
136000
SH
SOLE
136000
0
0
APTINYX INC
COM
03836N103
5045
305000
SH
SOLE
305000
0
0
ARDELYX INC
COM
039697107
3580
2000000
SH
SOLE
2000000
0
0
ARGENX SE
SPONSORED ADR
04016X101
17100
178000
SH
SOLE
178000
0
0
ARVINAS INC
COM
04335A105
1928
150000
SH
SOLE
150000
0
0
ASCENDIS PHARMA A S
SPONSORED ADR
04351P101
15255
243500
SH
SOLE
243500
0
0
ASSEMBLY BIOSCIENCES INC
COM
045396108
10179
450000
SH
SOLE
450000
0
0
AUDENTES THERAPEUTICS INC
COM
05070R104
10660
500000
SH
SOLE
500000
0
0
AXOGEN INC
COM
05463X106
12339
603970
SH
SOLE
603970
0
0
AXONICS MODULATION TECH INC
COM
05465P101
6044
400000
SH
SOLE
400000
0
0
BAXTER INTL INC
COM
071813109
19792
300700
SH
SOLE
300700
0
0
BEIGENE LTD
SPONSORED ADR
07725L102
30128
214800
SH
SOLE
214800
0
0
BIOCRYST PHARMACEUTICALS
COM
09058V103
5649
700000
SH
SOLE
700000
0
0
BIOGEN INC
COM
09062X103
15046
50000
SH
SOLE
50000
0
0
BIOHAVEN PHARMACTL HLDG CO L
COM
G11196105
9615
260000
SH
SOLE
260000
0
0
BIOMARIN PHARMACEUTICAL INC
COM
09061G101
10984
129000
SH
SOLE
129000
0
0
BLUEBIRD BIO INC
COM
09609G100
4464
45000
SH
SOLE
45000
0
0
BLUEPRINT MEDICINES CORP
COM
09627Y109
11518
213658
SH
SOLE
213658
0
0
BOSTON SCIENTIFIC CORP
COM
101137107
32336
915000
SH
SOLE
915000
0
0
CELGENE CORP
COM
151020104
11866
185150
SH
SOLE
185150
0
0
CHIASMA INC
COM
16706W102
1633
525000
SH
SOLE
525000
0
0
CLEMENTIA PHARMACEUTICALS IN
COM
185575107
3234
275000
SH
SOLE
275000
0
0
CLOVIS ONCOLOGY INC
COM
189464100
4598
256000
SH
SOLE
256000
0
0
COHERUS BIOSCIENCES INC
COM
19249H103
6064
670000
SH
SOLE
670000
0
0
COLLEGIUM PHARMACEUTICAL INC
COM
19459J104
27560
1605105
SH
SOLE
1605105
0
0
COMPUGEN LTD
ORD
M25722105
2387
1100000
SH
SOLE
1100000
0
0
CORREVIO PHARMA CORP
COM
22026V105
2988
1200000
SH
SOLE
1200000
0
0
CORVUS PHARMACEUTICALS INC
COM
221015100
1468
400000
SH
SOLE
400000
0
0
CYMABAY THERAPEUTICS INC
COM
23257D103
4829
613604
SH
SOLE
613604
0
0
DAVITA INC
COM
23918K108
11074
215200
SH
SOLE
215200
0
0
DERMIRA INC
COM
24983L104
3717
517000
SH
SOLE
517000
0
0
DERMIRA INC
NOTE 3.000% 5/1
24983LAB0
775
1000000
PRN
SOLE
1000000
0
0
DYNAVAX TECHNOLOGIES CORP
COM NEW
268158201
3477
380000
SH
SOLE
380000
0
0
EDWARDS LIFESCIENCES CORP
COM
28176E108
28107
183500
SH
SOLE
183500
0
0
ENCOMPASS HEALTH CORP
COM
29261A100
44733
725000
SH
SOLE
725000
0
0
EPIZYME INC
COM
29428V104
9902
1607500
SH
SOLE
1607500
0
0
EXACT SCIENCES CORP
COM
30063P105
24294
385000
SH
SOLE
385000
0
0
EXELIXIS INC
COM
30161Q104
12223
621400
SH
SOLE
621400
0
0
FIBROGEN INC
COM
31572Q808
14162
306000
SH
SOLE
306000
0
0
FIVE PRIME THERAPEUTICS INC
COM
33830X104
4697
505000
SH
SOLE
505000
0
0
FRESHPET INC
COM
358039105
7558
235000
SH
SOLE
235000
0
0
G1 THERAPEUTICS INC
COM
3621LQ109
1915
100000
SH
SOLE
100000
0
0
GALAPAGOS NV
SPON ADR
36315X101
16284
177500
SH
SOLE
177500
0
0
GLOBAL BLOOD THERAPEUTICS IN
COM
37890U108
10057
245000
SH
SOLE
245000
0
0
GLOBAL CORD BLOOD CORPORATIO
SHS
G39342103
5966
925000
SH
SOLE
925000
0
0
GUARDANT HEALTH INC
COM
40131M109
8119
216000
SH
SOLE
216000
0
0
GW PHARMACEUTICALS PLC
ADS
36197T103
58385
599500
SH
SOLE
599500
0
0
HCA HEALTHCARE INC
COM
40412C101
56625
455000
SH
SOLE
455000
0
0
HERON THERAPEUTICS INC
COM
427746102
13619
525000
SH
SOLE
525000
0
0
HOMOLOGY MEDICINES INC
COM
438083107
10062
450000
SH
SOLE
450000
0
0
IDEXX LABS INC
COM
45168D104
20555
110500
SH
SOLE
110500
0
0
IMMUNOMEDICS INC
COM
452907108
11131
780000
SH
SOLE
780000
0
0
INCYTE CORP
COM
45337C102
19713
310000
SH
SOLE
310000
0
0
INFLARX NV
COM
N44821101
7925
217900
SH
SOLE
217900
0
0
INOGEN INC
COM
45780L104
14528
117000
SH
SOLE
117000
0
0
INSMED INC
COM PAR $.01
457669307
11152
850000
SH
SOLE
850000
0
0
INSMED INC
NOTE 1.750% 1/1
457669AA7
4296
6000000
PRN
SOLE
6000000
0
0
INTERSECT ENT INC
COM
46071F103
13104
465000
SH
SOLE
465000
0
0
INTUITIVE SURGICAL INC
COM NEW
46120E602
72796
152000
SH
SOLE
152000
0
0
INVITAE CORP
COM
46185L103
15484
1400000
SH
SOLE
1400000
0
0
IRHYTHM TECHNOLOGIES INC
COM
450056106
33489
482000
SH
SOLE
482000
0
0
LA JOLLA PHARMACEUTICAL CO
COM PAR $.0001 2
503459604
2614
277236
SH
SOLE
277236
0
0
LOXO ONCOLOGY INC
COM
548862101
33827
241500
SH
SOLE
241500
0
0
MACROGENICS INC
COM
556099109
1028
80981
SH
SOLE
80981
0
0
MADRIGAL PHARMACEUTICALS INC
COM
558868105
27166
241000
SH
SOLE
241000
0
0
MEDICINES CO
COM
584688105
13913
726900
SH
SOLE
726900
0
0
MEDICINES CO
NOTE 2.500% 1/1
584688AE5
2589
3000000
PRN
SOLE
3000000
0
0
MEDICINES CO
NOTE 2.750% 7/1
584688AG0
3793
5000000
PRN
SOLE
5000000
0
0
MERSANA THERAPEUTICS INC
COM
59045L106
4080
1000000
SH
SOLE
1000000
0
0
MIRATI THERAPEUTICS INC
COM
60468T105
6363
150000
SH
SOLE
150000
0
0
MOLINA HEALTHCARE INC
COM
60855R100
39747
342000
SH
SOLE
342000
0
0
MOMENTA PHARMACEUTICALS INC
COM
60877T100
4416
400000
SH
SOLE
400000
0
0
MYOVANT SCIENCES LTD
COM
G637AM102
5702
347500
SH
SOLE
347500
0
0
NABRIVA THERAPEUTICS PLC
SHS
G63637105
2336
1600000
SH
SOLE
1600000
0
0
NEUROCRINE BIOSCIENCES INC
COM
64125C109
56314
788600
SH
SOLE
788600
0
0
NEUROCRINE BIOSCIENCES INC
NOTE 2.250% 5/1
64125CAD1
1196
1000000
PRN
SOLE
1000000
0
0
NOVAVAX INC
COM
670002104
5980
3250000
SH
SOLE
3250000
0
0
NOVOCURE LTD
ORD SHS
G6674U108
6529
195000
SH
SOLE
195000
0
0
OBSEVA SA
COM
H5861P103
14179
1120000
SH
SOLE
1120000
0
0
ODONATE THERAPEUTICS INC
COM
676079106
6266
445000
SH
SOLE
445000
0
0
PACIRA PHARMACEUTICALS INC
COM
695127100
53775
1250000
SH
SOLE
1250000
0
0
PACIRA PHARMACEUTICALS INC
NOTE 2.375% 4/0
695127AD2
994
1000000
PRN
SOLE
1000000
0
0
PARATEK PHARMACEUTICALS INC
COM
699374302
2309
450000
SH
SOLE
450000
0
0
PENUMBRA INC
COM
70975L107
27495
225000
SH
SOLE
225000
0
0
PHASEBIO PHARMACEUTICALS INC
COM
717224109
2580
835000
SH
SOLE
835000
0
0
PORTOLA PHARMACEUTICALS INC
COM
737010108
5856
300000
SH
SOLE
300000
0
0
PRA HEALTH SCIENCES INC
COM
69354M108
18392
200000
SH
SOLE
200000
0
0
PROTEOSTASIS THERAPEUTICS IN
COM
74373B109
1296
400000
SH
SOLE
400000
0
0
PUMA BIOTECHNOLOGY INC
COM
74587V107
9289
456462
SH
SOLE
456462
0
0
RA PHARMACEUTICALS INC
COM
74933V108
13650
750000
SH
SOLE
750000
0
0
RADIUS HEALTH INC
COM NEW
750469207
18139
1100000
SH
SOLE
1100000
0
0
RADIUS HEALTH INC
NOTE 3.000% 9/0
750469AA6
1157
1500000
PRN
SOLE
1500000
0
0
RESTORBIO INC
COM
76133L103
3448
400000
SH
SOLE
400000
0
0
RETROPHIN INC
COM
761299106
9052
400000
SH
SOLE
400000
0
0
RHYTHM PHARMACEUTICALS INC
COM
76243J105
5820
216500
SH
SOLE
216500
0
0
RIGEL PHARMACEUTICALS INC
COM NEW
766559603
9660
4200000
SH
SOLE
4200000
0
0
RTI SURGICAL INC
COM
74975N105
7215
1950000
SH
SOLE
1950000
0
0
SAGE THERAPEUTICS INC
COM
78667J108
4694
49000
SH
SOLE
49000
0
0
SAREPTA THERAPEUTICS INC
COM
803607100
35686
327000
SH
SOLE
327000
0
0
SEATTLE GENETICS INC
COM
812578102
11474
202500
SH
SOLE
202500
0
0
SOLID BIOSCIENCES INC
COM
83422E105
1581
58999
SH
SOLE
58999
0
0
SPARK THERAPEUTICS INC
COM
84652J103
21038
537500
SH
SOLE
537500
0
0
SPERO THERAPEUTICS INC
COM
84833T103
3229
525000
SH
SOLE
525000
0
0
STRYKER CORP
COM
863667101
28058
179000
SH
SOLE
179000
0
0
TELEFLEX INC
COM
879369106
33602
130000
SH
SOLE
130000
0
0
TESARO INC
COM
881569107
44676
601700
SH
SOLE
601700
0
0
THERAVANCE BIOPHARMA INC
NOTE 3.250%11/0
88339KAA0
1547
1500000
PRN
SOLE
1500000
0
0
THERAVANCE BIOPHARMA INC
COM
G8807B106
14075
550000
SH
SOLE
550000
0
0
THERMO FISHER SCIENTIFIC INC
COM
883556102
21484
96000
SH
SOLE
96000
0
0
TRANSLATE BIO INC
COM
89374L104
7569
1009179
SH
SOLE
1009179
0
0
ULTRAGENYX PHARMACEUTICAL IN
COM
90400D108
18479
425000
SH
SOLE
425000
0
0
UNITEDHEALTH GROUP INC
COM
91324P102
150244
603100
SH
SOLE
603100
0
0
VERTEX PHARMACEUTICALS INC
COM
92532F100
33639
203000
SH
SOLE
203000
0
0
WELLCARE HEALTH PLANS INC
COM
94946T106
91957
389500
SH
SOLE
389500
0
0
WEST PHARMACEUTICAL SVSC INC
COM
955306105
15685
160000
SH
SOLE
160000
0
0
WRIGHT MED GROUP N V
ORD SHS 0.03 PAR
N96617118
27220
1000000
SH
SOLE
1000000
0
0
ZAI LAB LTD
ADR
98887Q104
8127
350000
SH
SOLE
350000
0
0
ZIMMER BIOMET HLDGS INC
COM
98956P102
12187
117500
SH
SOLE
117500
0
0
ZOGENIX INC
COM NEW
98978L204
8568
235000
SH
SOLE
235000
0
0