Dark
Light
System
Institutional Investment Manager
Rock Springs Capital Management LP
Rock Springs Capital Management LP (CIK: 0001595725) incorporated in Delaware, located at 650 South Exeter Street, Baltimore, MD. Institutional holdings reported to the SEC.

Institutional Holdings (2016Q3)
Portfolio Summary: 137 holdings with a total value of $1,595,270,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 ARIAD PHARMACEUTICALS ORD (NMS) 25,000 342,000 0.02%
2 INFINITY PHARMACEUTICALS INC 270,000 421,000 0.03%
3 OREXIGEN THERAPEUTICS INC 165,300 549,000 0.03%
4 CERULEAN PHARMA INC 625,000 654,000 0.04%
5 MADRIGAL PHARMACEUTICALS INC 63,000 799,000 0.05%
6 WRIGHT MED GROUP INC SR CONV NT 2 20 1,000,000 1,073,000 0.07% PRN
7 INSYS THERAPEUTICS INC NEW COM NEW 100,000 1,179,000 0.07%
8 CERNER CORP 20,000 1,235,000 0.08%
9 BLUEBIRD BIO INC COM 20,000 1,356,000 0.09%
10 Life Technologies Corp 433,500 1,379,000 0.09%
11 ANTHERA PHARMACEUTICALS I 450,000 1,418,000 0.09%
12 CHIASMA INC 492,500 1,448,000 0.09%
13 EXELIXIS INC 125,000 1,599,000 0.10%
14 VALEANT PHARMACEUTICALS INTL 68,600 1,684,000 0.11%
15 DYNAVAX TECHNOLOGIES CORP 165,000 1,731,000 0.11%
16 NOVAVAX INC COM 852,500 1,773,000 0.11%
17 NOVOCURE LTD 214,316 1,830,000 0.11%
18 DIMENSION THERAPEUTICS INC 271,370 2,168,000 0.14%
19 AMSURG CORP 32,500 2,179,000 0.14%
20 GLOBAL BLOOD THERAPEUTICS INCORPORATED 98,000 2,259,000 0.14%
21 Egalet Corp 300,000 2,283,000 0.14%
22 SCYNEXIS INC 635,000 2,457,000 0.15%
23 GENOCEA BIOSCIENCES INC 480,000 2,458,000 0.15%
24 TETRAPHASE PHARMACEUTICALS INC COM 662,500 2,537,000 0.16%
25 DBV TECHNOLOGIES S A 73,000 2,652,000 0.17%
26 SERES THERAPEUTICS INC 220,000 2,704,000 0.17%
27 ASSEMBLY BIOSCIENCES INC 390,000 2,812,000 0.18%
28 CIDARA THERAPEUTICS INC 250,000 2,863,000 0.18%
29 INTRA-CELLULAR THERAPIES INC 190,000 2,896,000 0.18%
30 STERIS PLC SHS USD 40,000 2,924,000 0.18%
31 ADR - Nabriva Therapeutics AG- Usd 426,000 3,003,000 0.19%
32 MEDNAX INC 50,000 3,313,000 0.21%
33 AEGLEA BIOTHERAPEUTICS INC 524,089 3,359,000 0.21%
34 PERRIGO CO PLC 37,900 3,499,000 0.22%
35 INNOVIVA INC COM 336,900 3,703,000 0.23%
36 CARDIOME PHARMA CORP 1,200,000 3,751,000 0.24%
37 Otonomy Inc 210,000 3,820,000 0.24%
38 MEDICINES CO SR GLBL CV NT 22 3,000,000 3,898,000 0.24% PRN
39 Nivalis Therapeutics Inc 489,000 3,976,000 0.25%
40 MEDPACE HLDGS INC 135,000 4,031,000 0.25%
41 ALLERGAN PLC 5,000 4,106,000 0.26%
42 BIOSCRIP INC 1,490,492 4,308,000 0.27%
43 AIMMUNE THERAPEUTICS INC COM 293,000 4,395,000 0.28%
44 KITE PHARMA INCORPORATED 79,000 4,413,000 0.28%
45 CHINA CORD BLOOD CORP 880,000 4,497,000 0.28%
46 CLOVIS ONCOLOGY INC 125,000 4,506,000 0.28%
47 TANDEM DIABETES CARE INC COM 595,000 4,558,000 0.29%
48 PUMA BIOTECHNOLOGY 69,500 4,660,000 0.29%
49 ADAPTIMMUNE THERAPEUTICS PLC 675,000 4,759,000 0.30%
50 FIBROGEN INC 233,500 4,833,000 0.30%
Page 1 of 3

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001172661-16-004294, filed 2016.11.14).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.