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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 (2016Q2)
Portfolio Summary: 137 holdings with a total value of $1,350,771,000.
#
Name
Shares
Value ($)
%
Options
Notes
51 EDWARDS LIFESCIENCES CORP 83,500 8,327,000 0.62%
52 HOLOGIC INC 230,000 7,958,000 0.59%
53 SERES THERAPEUTICS INC 262,000 7,611,000 0.56%
54 JUNO THERAPEUTICS INC COM 197,001 7,573,000 0.56%
55 ENVISION HEALTHCARE HLDGS INC 291,000 7,383,000 0.55%
56 INTRA-CELLULAR THERAPIES INC 190,000 7,376,000 0.55%
57 VERTEX PHARMACEUTICALS INC 85,500 7,355,000 0.54%
58 OPHTHOTECH CORP 142,500 7,272,000 0.54%
59 AMERICAN RENAL ASSOCIATES HO 250,000 7,243,000 0.54%
60 CORSICANTO LTD 7,000,000 7,214,000 0.53% PRN
61 ULTRAGENYX PHARMACEUTICAL INC COM 141,500 6,921,000 0.51%
62 COHERUS BIOSCIENCES INC COM 400,000 6,756,000 0.50%
63 BEIGENE LTD 225,000 6,705,000 0.50%
64 RTI SURGICAL HOLDINGS INC COM 1,860,000 6,677,000 0.49%
65 CORVUS PHARMACEUTICALS INC COM 450,000 6,417,000 0.48%
66 INVITAE CORP 858,380 6,343,000 0.47%
67 FIVE PRIME THERAPEUTICS INC 153,000 6,327,000 0.47%
68 ATHENA HEALTH INC. 45,750 6,314,000 0.47%
69 ADAPTIMMUNE THERAPEUTICS PLC 765,001 6,235,000 0.46%
70 NOVAVAX INC COM 852,500 6,198,000 0.46%
71 CARDIOME PHARMA CORP 1,200,000 6,144,000 0.45%
72 EPIZYME INC COM 597,500 6,118,000 0.45%
73 MACROGENICS INC 225,000 6,073,000 0.45%
74 HILL ROM HLDGS INC 120,000 6,054,000 0.45%
75 REGENERON PHARMACEUTICALS 17,000 5,937,000 0.44%
76 EGALET CORP 7,800,000 5,923,000 0.44% PRN
77 PARATEK PHARMACEUTICALS INC 418,500 5,821,000 0.43%
78 NOVADAQ TECHNOLOGIES INC 555,000 5,461,000 0.40%
79 AVEXIS INC COM 142,758 5,428,000 0.40%
80 COMPUGEN LTD 820,000 5,314,000 0.39%
81 CHINA CORD BLOOD CORP 880,000 5,060,000 0.37%
82 PROTEOSTASIS THERAPEUTICS IN COM 415,000 5,034,000 0.37%
83 INSMED INC 497,500 4,905,000 0.36%
84 INSYS THERAPEUTICS INC NEW COM NEW 365,500 4,730,000 0.35%
85 ADURO BIOTECH INC 415,000 4,694,000 0.35%
86 ALDER BIOPHARMACEUTICALS INC 180,500 4,507,000 0.33%
87 TANDEM DIABETES CARE INC COM 595,000 4,486,000 0.33%
88 Intersect ENT Inc 340,000 4,396,000 0.33%
89 ALLERGAN PLC 5,000 4,164,000 0.31%
90 PORTOLA PHARMACEUTICALS INC 175,000 4,130,000 0.31%
91 KITE PHARMA INCORPORATED 80,000 4,000,000 0.30%
92 Ascendis Pharma 300,000 3,981,000 0.29%
93 RIGEL PHARMACEUTICAL INC 1,750,000 3,903,000 0.29%
94 Otonomy Inc 240,000 3,811,000 0.28%
95 AMICUS THERAPEUTICS INC COM 680,000 3,713,000 0.27%
96 FIBROGEN INC 225,000 3,692,000 0.27%
97 AURIS MED HLDG AG 850,000 3,562,000 0.26%
98 MEDICINES CO SR GLBL CV NT 22 3,000,000 3,549,000 0.26% PRN
99 INNOVIVA INC COM 336,900 3,548,000 0.26%
100 ENDOCHOICE HLDGS INC 710,000 3,479,000 0.26%
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Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001172661-16-003863, filed 2016.08.15).

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.