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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 (2016Q1)
Portfolio Summary: 128 holdings with a total value of $1,193,502,000.
#
Name
Shares
Value ($)
%
Options
Notes
51 RTI SURGICAL HOLDINGS INC COM 1,860,000 7,440,000 0.62%
52 COOPER COS INC 47,600 7,329,000 0.61%
53 EPIZYME INC COM 589,000 7,139,000 0.60%
54 RETROPHIN INC 521,400 7,122,000 0.60%
55 SERES THERAPEUTICS INC 262,000 6,959,000 0.58%
56 EDWARDS LIFESCIENCES CORP 76,000 6,704,000 0.56%
57 VERTEX PHARMACEUTICALS INC 83,900 6,669,000 0.56%
58 ALKERMES PLC 194,500 6,650,000 0.56%
59 CORVUS PHARMACEUTICALS INC COM 456,887 6,625,000 0.56%
60 BEIGENE LTD 225,000 6,595,000 0.55%
61 Intersect ENT Inc 340,000 6,460,000 0.54%
62 ATHENA HEALTH INC. 45,750 6,349,000 0.53%
63 ADAPTIMMUNE THERAPEUTICS PLC 765,001 6,219,000 0.52%
64 NOVADAQ TECHNOLOGIES INC 555,000 6,155,000 0.52%
65 Heartware International, Inc. 193,000 6,064,000 0.51%
66 DERMIRA INC COM 290,000 5,997,000 0.50%
67 COHERUS BIOSCIENCES INC COM 282,000 5,987,000 0.50%
68 REGENERON PHARMACEUTICALS 16,500 5,947,000 0.50%
69 FIVE PRIME THERAPEUTICS INC 144,500 5,871,000 0.49%
70 INSYS THERAPEUTICS INC NEW COM NEW 365,500 5,844,000 0.49%
71 INSMED INC 450,000 5,702,000 0.48%
72 ENVISION HEALTHCARE HLDGS INC 266,000 5,426,000 0.45%
73 CHINA CORD BLOOD CORP 880,000 5,342,000 0.45%
74 ADURO BIOTECH INC 415,000 5,316,000 0.45%
75 INTRA-CELLULAR THERAPIES INC 187,500 5,213,000 0.44%
76 AMICUS THERAPEUTICS INC COM 613,500 5,184,000 0.43%
77 Ascendis Pharma 270,000 5,009,000 0.42%
78 XENOPORT INC 1,100,000 4,961,000 0.42%
79 TANDEM DIABETES CARE INC COM 562,500 4,899,000 0.41%
80 CARDIOME PHARMA CORP 1,190,000 4,867,000 0.41%
81 ALLERGAN PLC 5,000 4,585,000 0.38%
82 COMPUGEN LTD 820,000 4,576,000 0.38%
83 PROTEOSTASIS THERAPEUTICS IN COM 470,000 4,531,000 0.38%
84 CHIASMA INC 492,500 4,511,000 0.38%
85 NOVAVAX INC COM 852,500 4,399,000 0.37%
86 FIBROGEN INC 204,000 4,343,000 0.36%
87 MACROGENICS INC 225,000 4,219,000 0.35%
88 AIMMUNE THERAPEUTICS INC COM 293,000 3,973,000 0.33%
89 AVEXIS INC COM 142,758 3,889,000 0.33%
90 PERRIGO CO PLC 30,000 3,838,000 0.32%
91 GENOCEA BIOSCIENCES INC 480,000 3,715,000 0.31%
92 KITE PHARMA INCORPORATED 80,000 3,673,000 0.31%
93 Otonomy Inc 240,000 3,581,000 0.30%
94 PORTOLA PHARMACEUTICALS INC 175,000 3,570,000 0.30%
95 ADR - Nabriva Therapeutics AG- Usd 380,000 3,405,000 0.29%
96 MEDICINES CO SR GLBL CV NT 22 3,000,000 3,405,000 0.29% PRN
97 PARATEK PHARMACEUTICALS INC 223,000 3,383,000 0.28%
98 CIDARA THERAPEUTICS INC 250,000 3,175,000 0.27%
99 DYNAVAX TECHNOLOGIES CORP 165,000 3,175,000 0.27%
100 NOVOCURE LTD 214,316 3,103,000 0.26%
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Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001172661-16-003409, filed 2016.05.16).

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.