0001172661-19-001294.txt : 20190515
0001172661-19-001294.hdr.sgml : 20190515
20190515103219
ACCESSION NUMBER: 0001172661-19-001294
CONFORMED SUBMISSION TYPE: 13F-HR
PUBLIC DOCUMENT COUNT: 2
CONFORMED PERIOD OF REPORT: 20190331
FILED AS OF DATE: 20190515
DATE AS OF CHANGE: 20190515
EFFECTIVENESS DATE: 20190515
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: 19825843
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
03-31-2019
03-31-2019
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
05-15-2019
0
131
2593735
INFORMATION TABLE
2
infotable.xml
ACADIA HEALTHCARE COMPANY IN
COM
00404A109
27112
925000
SH
SOLE
925000
0
0
ACHILLION PHARMACEUTICALS IN
COM
00448Q201
7992
2700000
SH
SOLE
2700000
0
0
ACLARIS THERAPEUTICS INC
COM
00461U105
10183
1700000
SH
SOLE
1700000
0
0
ADAPTIMMUNE THERAPEUTICS PLC
SPONDS ADR
00653A107
3440
800000
SH
SOLE
800000
0
0
AEGLEA BIOTHERAPEUTICS INC
COM
00773J103
6440
800000
SH
SOLE
800000
0
0
AGILENT TECHNOLOGIES INC
COM
00846U101
14693
182800
SH
SOLE
182800
0
0
AGIOS PHARMACEUTICALS INC
COM
00847X104
7924
117500
SH
SOLE
117500
0
0
ALDER BIOPHARMACEUTICALS INC
COM
014339105
21294
1560000
SH
SOLE
1560000
0
0
ALDER BIOPHARMACEUTICALS INC
NOTE 2.500% 2/0
014339AA3
4798
5000000
PRN
SOLE
5000000
0
0
ALEXION PHARMACEUTICALS INC
COM
015351109
32781
242500
SH
SOLE
242500
0
0
ALIGN TECHNOLOGY INC
COM
016255101
29855
105000
SH
SOLE
105000
0
0
ALLAKOS INC
COM
01671P100
16362
404000
SH
SOLE
404000
0
0
ALNYLAM PHARMACEUTICALS INC
COM
02043Q107
21821
233500
SH
SOLE
233500
0
0
AMARIN CORP PLC
SPONS ADR NEW
023111206
93939
4525000
SH
SOLE
4525000
0
0
AMICUS THERAPEUTICS INC
COM
03152W109
13600
1000000
SH
SOLE
1000000
0
0
ANAPTYSBIO INC
COM
032724106
12419
170000
SH
SOLE
170000
0
0
ANTHEM INC
COM
036752103
5740
20000
SH
SOLE
20000
0
0
ARDELYX INC
COM
039697107
5600
2000000
SH
SOLE
2000000
0
0
ARGENX SE
SPONSORED ADR
04016X101
22683
181700
SH
SOLE
181700
0
0
ARVINAS INC
COM
04335A105
2214
150000
SH
SOLE
150000
0
0
ASCENDIS PHARMA A S
SPONSORED ADR
04351P101
25129
213500
SH
SOLE
213500
0
0
ASSEMBLY BIOSCIENCES INC
COM
045396108
8861
450000
SH
SOLE
450000
0
0
AUDENTES THERAPEUTICS INC
COM
05070R104
20388
522500
SH
SOLE
522500
0
0
AXOGEN INC
COM
05463X106
12720
603970
SH
SOLE
603970
0
0
AXONICS MODULATION TECH INC
COM
05465P101
9580
400000
SH
SOLE
400000
0
0
BAXTER INTL INC
COM
071813109
24450
300700
SH
SOLE
300700
0
0
BEIGENE LTD
SPONSORED ADR
07725L102
28354
214800
SH
SOLE
214800
0
0
BIOCRYST PHARMACEUTICALS
COM
09058V103
5698
700000
SH
SOLE
700000
0
0
BIOGEN INC
COM
09062X103
23047
97500
SH
Call
SOLE
97500
0
0
BIOHAVEN PHARMACTL HLDG CO L
COM
G11196105
13382
260000
SH
SOLE
260000
0
0
BIOMARIN PHARMACEUTICAL INC
COM
09061G101
11992
135000
SH
SOLE
135000
0
0
BLUEBIRD BIO INC
COM
09609G100
7080
45000
SH
SOLE
45000
0
0
BLUEPRINT MEDICINES CORP
COM
09627Y109
22014
275000
SH
SOLE
275000
0
0
BOSTON SCIENTIFIC CORP
COM
101137107
37229
970000
SH
SOLE
970000
0
0
CELGENE CORP
COM
151020104
17467
185150
SH
SOLE
185150
0
0
CHIASMA INC
COM
16706W102
3380
650000
SH
SOLE
650000
0
0
CIGNA CORP NEW
COM
125523100
14474
90000
SH
SOLE
90000
0
0
CLEMENTIA PHARMACEUTICALS IN
COM
185575107
7178
275000
SH
SOLE
275000
0
0
CLOVIS ONCOLOGY INC
COM
189464100
6354
256000
SH
SOLE
256000
0
0
COHERUS BIOSCIENCES INC
COM
19249H103
9139
670000
SH
SOLE
670000
0
0
COLLEGIUM PHARMACEUTICAL INC
COM
19459J104
23889
1577893
SH
SOLE
1577893
0
0
COMPUGEN LTD
ORD
M25722105
4554
1100000
SH
SOLE
1100000
0
0
CORREVIO PHARMA CORP
COM
22026V105
3792
1200000
SH
SOLE
1200000
0
0
CORVUS PHARMACEUTICALS INC
COM
221015100
1608
400000
SH
SOLE
400000
0
0
COVETRUS INC
COM
22304C100
20703
650000
SH
SOLE
650000
0
0
CYMABAY THERAPEUTICS INC
COM
23257D103
9495
715000
SH
SOLE
715000
0
0
DERMIRA INC
COM
24983L104
10501
775000
SH
SOLE
775000
0
0
DERMIRA INC
NOTE 3.000% 5/1
24983LAB0
888
1000000
PRN
SOLE
1000000
0
0
DYNAVAX TECHNOLOGIES CORP
COM NEW
268158201
2778
380000
SH
SOLE
380000
0
0
EDWARDS LIFESCIENCES CORP
COM
28176E108
35109
183500
SH
SOLE
183500
0
0
ENCOMPASS HEALTH CORP
COM
29261A100
46720
800000
SH
SOLE
800000
0
0
EPIZYME INC
COM
29428V104
21724
1753375
SH
SOLE
1753375
0
0
EXACT SCIENCES CORP
COM
30063P105
34388
397000
SH
SOLE
397000
0
0
FIBROGEN INC
COM
31572Q808
16631
306000
SH
SOLE
306000
0
0
FIVE PRIME THERAPEUTICS INC
COM
33830X104
6767
505000
SH
SOLE
505000
0
0
FRESHPET INC
COM
358039105
9938
235000
SH
SOLE
235000
0
0
GALAPAGOS NV
SPON ADR
36315X101
19434
165000
SH
SOLE
165000
0
0
GLOBAL BLOOD THERAPEUTICS IN
COM
37890U108
12968
245000
SH
SOLE
245000
0
0
GLOBAL CORD BLOOD CORPORATIO
SHS
G39342103
6494
925000
SH
SOLE
925000
0
0
GUARDANT HEALTH INC
COM
40131M109
13806
180000
SH
SOLE
180000
0
0
GW PHARMACEUTICALS PLC
ADS
36197T103
117999
700000
SH
SOLE
700000
0
0
HCA HEALTHCARE INC
COM
40412C101
59323
455000
SH
SOLE
455000
0
0
HERON THERAPEUTICS INC
COM
427746102
8554
350000
SH
SOLE
350000
0
0
HOMOLOGY MEDICINES INC
COM
438083107
10260
370000
SH
SOLE
370000
0
0
IDEXX LABS INC
COM
45168D104
26877
120200
SH
SOLE
120200
0
0
IMMUNOMEDICS INC
COM
452907108
15368
800000
SH
SOLE
800000
0
0
INCYTE CORP
COM
45337C102
26861
312300
SH
SOLE
312300
0
0
INFLARX NV
COM
N44821101
8503
225000
SH
SOLE
225000
0
0
INSMED INC
COM PAR $.01
457669307
24710
850000
SH
SOLE
850000
0
0
INSMED INC
NOTE 1.750% 1/1
457669AA7
6082
6000000
PRN
SOLE
6000000
0
0
INTERSECT ENT INC
COM
46071F103
14950
465000
SH
SOLE
465000
0
0
INTUITIVE SURGICAL INC
COM NEW
46120E602
87013
152500
SH
SOLE
152500
0
0
INVITAE CORP
COM
46185L103
26933
1150000
SH
SOLE
1150000
0
0
IRHYTHM TECHNOLOGIES INC
COM
450056106
37451
499615
SH
SOLE
499615
0
0
KALEIDO BIOSCIENCES INC
COM
483347100
1451
100050
SH
SOLE
100050
0
0
LA JOLLA PHARMACEUTICAL CO
COM PAR $.0001 2
503459604
1783
277236
SH
SOLE
277236
0
0
MACROGENICS INC
COM
556099109
5394
300000
SH
SOLE
300000
0
0
MADRIGAL PHARMACEUTICALS INC
COM
558868105
31973
255250
SH
SOLE
255250
0
0
MEDICINES CO
COM
584688105
20387
729400
SH
SOLE
729400
0
0
MEDICINES CO
NOTE 2.500% 1/1
584688AE5
3013
3000000
PRN
SOLE
3000000
0
0
MEDICINES CO
NOTE 2.750% 7/1
584688AG0
4231
5000000
PRN
SOLE
5000000
0
0
MERSANA THERAPEUTICS INC
COM
59045L106
7364
1400000
SH
SOLE
1400000
0
0
MIRATI THERAPEUTICS INC
COM
60468T105
13194
180000
SH
SOLE
180000
0
0
MOLINA HEALTHCARE INC
COM
60855R100
29457
207500
SH
SOLE
207500
0
0
MOMENTA PHARMACEUTICALS INC
COM
60877T100
5812
400000
SH
SOLE
400000
0
0
MYOVANT SCIENCES LTD
COM
G637AM102
8295
347500
SH
SOLE
347500
0
0
NABRIVA THERAPEUTICS PLC
SHS
G63637105
3904
1600000
SH
SOLE
1600000
0
0
NEUROCRINE BIOSCIENCES INC
COM
64125C109
74400
844500
SH
SOLE
844500
0
0
NEUROCRINE BIOSCIENCES INC
NOTE 2.250% 5/1
64125CAD1
1354
1000000
PRN
SOLE
1000000
0
0
NEVRO CORP
COM
64157F103
2169
34700
SH
SOLE
34700
0
0
NOVAVAX INC
COM
670002104
1790
3250000
SH
SOLE
3250000
0
0
NOVOCURE LTD
ORD SHS
G6674U108
9393
195000
SH
SOLE
195000
0
0
OBSEVA SA
COM
H5861P103
14325
1120000
SH
SOLE
1120000
0
0
ODONATE THERAPEUTICS INC
COM
676079106
9839
445000
SH
SOLE
445000
0
0
PACIRA PHARMACEUTICALS INC
COM
695127100
47575
1250000
SH
SOLE
1250000
0
0
PACIRA PHARMACEUTICALS INC
NOTE 2.375% 4/0
695127AD2
987
1000000
PRN
SOLE
1000000
0
0
PARATEK PHARMACEUTICALS INC
COM
699374302
2412
450000
SH
SOLE
450000
0
0
PENUMBRA INC
COM
70975L107
33077
225000
SH
SOLE
225000
0
0
PHASEBIO PHARMACEUTICALS INC
COM
717224109
10841
1140000
SH
SOLE
1140000
0
0
PORTOLA PHARMACEUTICALS INC
COM
737010108
30363
875000
SH
SOLE
875000
0
0
PRA HEALTH SCIENCES INC
COM
69354M108
26470
240000
SH
SOLE
240000
0
0
PROTEOSTASIS THERAPEUTICS IN
COM
74373B109
504
400000
SH
SOLE
400000
0
0
PUMA BIOTECHNOLOGY INC
COM
74587V107
17766
458000
SH
SOLE
458000
0
0
RA PHARMACEUTICALS INC
COM
74933V108
18010
804000
SH
SOLE
804000
0
0
RADIUS HEALTH INC
COM NEW
750469207
23430
1175000
SH
SOLE
1175000
0
0
RADIUS HEALTH INC
NOTE 3.000% 9/0
750469AA6
1249
1500000
PRN
SOLE
1500000
0
0
RESTORBIO INC
COM
76133L103
2728
400000
SH
SOLE
400000
0
0
RETROPHIN INC
COM
761299106
18783
830000
SH
SOLE
830000
0
0
RHYTHM PHARMACEUTICALS INC
COM
76243J105
5934
216500
SH
SOLE
216500
0
0
RIGEL PHARMACEUTICALS INC
COM NEW
766559603
10794
4200000
SH
SOLE
4200000
0
0
RTI SURGICAL HOLDINGS INC
COM
74975N105
11720
1950000
SH
SOLE
1950000
0
0
SAGE THERAPEUTICS INC
COM
78667J108
14712
92500
SH
SOLE
92500
0
0
SAREPTA THERAPEUTICS INC
COM
803607100
39869
334500
SH
SOLE
334500
0
0
SEATTLE GENETICS INC
COM
812578102
17724
242000
SH
SOLE
242000
0
0
SOLID BIOSCIENCES INC
COM
83422E105
552
60000
SH
SOLE
60000
0
0
SPARK THERAPEUTICS INC
COM
84652J103
61211
537500
SH
SOLE
537500
0
0
SPERO THERAPEUTICS INC
COM
84833T103
6725
525000
SH
SOLE
525000
0
0
STRYKER CORP
COM
863667101
35356
179000
SH
SOLE
179000
0
0
TELEFLEX INC
COM
879369106
39281
130000
SH
SOLE
130000
0
0
THERAVANCE BIOPHARMA INC
NOTE 3.250%11/0
88339KAA0
1457
1500000
PRN
SOLE
1500000
0
0
THERAVANCE BIOPHARMA INC
COM
G8807B106
12469
550000
SH
SOLE
550000
0
0
THERMO FISHER SCIENTIFIC INC
COM
883556102
22171
81000
SH
SOLE
81000
0
0
TRANSLATE BIO INC
COM
89374L104
10284
1009179
SH
SOLE
1009179
0
0
ULTRAGENYX PHARMACEUTICAL IN
COM
90400D108
40229
580000
SH
SOLE
580000
0
0
UNITEDHEALTH GROUP INC
COM
91324P102
146131
591000
SH
SOLE
591000
0
0
VERTEX PHARMACEUTICALS INC
COM
92532F100
37342
203000
SH
SOLE
203000
0
0
WELLCARE HEALTH PLANS INC
COM
94946T106
86320
320000
SH
SOLE
320000
0
0
WEST PHARMACEUTICAL SVSC INC
COM
955306105
13775
125000
SH
SOLE
125000
0
0
WRIGHT MED GROUP N V
ORD SHS
N96617118
28953
920608
SH
SOLE
920608
0
0
ZAI LAB LTD
ADR
98887Q104
12199
413400
SH
SOLE
413400
0
0
ZOGENIX INC
COM NEW
98978L204
12927
235000
SH
SOLE
235000
0
0