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Rock Springs Capital Management Portfolio holdings

AUM $1.7B
1-Year Est. Return 93.03%
This Fund
S&P 500
This Quarter Est. Return
-17.49%
1 Year Est. Return
+93.03%
3 Year Est. Return
+228.43%
5 Year Est. Return
+368.14%
10 Year Est. Return
+4,607.77%
AUM
$2.12B
AUM Growth
-$643M
Cap. Flow
-$73.8M
Cap. Flow %
-3.48%
Top 10 Hldgs %
32.59%
Holding
150
New
6
Increased
39
Reduced
39
Closed
17

Top Buys

Rank Stock Value
1
WCG
Wellcare Health Plans, Inc.
WCG
+$41.3M
2
GWPH
GW Pharmaceuticals Plc American Depositary Shares
GWPH
+$26.2M
3
NBIX icon
Neurocrine Biosciences
NBIX
+$13.8M
4
SGEN
Seagen Inc. Common Stock
SGEN
+$12.7M
5
RARE icon
Ultragenyx Pharmaceutical
RARE
+$12.3M

Top Sells

Rank Stock Value
1
ABBV icon
AbbVie
ABBV
+$30.7M
2
MOH icon
Molina Healthcare
MOH
+$26.6M
3
ARNA
Arena Pharmaceuticals Inc
ARNA
+$17.3M
4
MDGL icon
Madrigal Pharmaceuticals
MDGL
+$15.6M
5
ECYT
Endocyte, Inc. Common Stock
ECYT
+$15.1M

Sector Composition

Rank Sector Weight
1 Healthcare 88.36%
2 Consumer Staples 0.36%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ADVM
126
DELISTED
Adverum Biotechnologies
ADVM
– –
-90,000
Closed -$5.45M
CDTX
127
DELISTED
Cidara Therapeutics
CDTX
– –
-15,000
Closed -$1.32M
CLSD
128
DELISTED
Clearside Biomedical
CLSD
– –
-65,000
Closed -$6M
ELAN icon
129
Elanco Animal Health
ELAN
$11.1B
– –
-375,000
Closed -$13.1M
ENTA icon
130
Enanta Pharmaceuticals
ENTA
$400M
– –
-92,500
Closed -$7.91M
KURA icon
131
Kura Oncology
KURA
$850M
– –
-405,000
Closed -$7.09M
MCRB icon
132
Seres Therapeutics
MCRB
$48.9M
– –
-11,000
Closed -$1.67M
SCYX icon
133
SCYNEXIS
SCYX
$52M
– –
-10,250
Closed -$984K
VKTX icon
134
Viking Therapeutics
VKTX
$4B
– –
-200,000
Closed -$3.48M
YARW
135
Yarrow Bioscience, Inc. Common Stock
YARW
$111M
– –
-92
Closed -$3.25M
ITCI
136
DELISTED
Intra-Cellular Therapies Inc.
ITCI
– –
-187,500
Closed -$4.07M
ONCT
137
CALL
DELISTED
Oncternal Therapeutics, Inc. Common Stock
ONCT
– –
-357
Closed -$79K
ARNA
138
DELISTED
Arena Pharmaceuticals Inc
ARNA
– –
-375,000
Closed -$17.3M
UROV
139
DELISTED
Urovant Sciences Ltd.
UROV
– –
-100,000
Closed -$1.2M
AGN
140
DELISTED
Allergan plc
AGN
– –
-17,665
Closed -$3.37M
ECYT
141
DELISTED
Endocyte, Inc. Common Stock
ECYT
– –
-850,000
Closed -$15.1M
2 3 4 5
6

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Rock Springs Capital Management's Q4 2018 Portfolio in Review

As of Q4 2018, Rock Springs Capital Management held 150 positions worth $2.12B, down 23% from $2.76B the previous quarter. Its ten largest holdings account for 33% of the portfolio.

Rock Springs Capital Management withdrew a net $73.8M in Q4 2018, closing 17 positions and reducing 39 holdings. Its most notable exit was AbbVie, an estimated $30.7M position sold in full.

By sector, the portfolio is most concentrated in Healthcare at 88% of assets, down from 90% a quarter earlier, followed by Consumer Staples.

Against the trend, Rock Springs Capital Management opened a new position in Seagen Inc. Common Stock worth $11.5M.

  • Rock Springs Capital Management's largest Q4 2018 buy was Seagen Inc. Common Stock: 202,500 shares worth $11.5M.
  • Rock Springs Capital Management added most to Wellcare Health Plans, Inc. in Q4 2018, an estimated $41.3M increase.
  • Rock Springs Capital Management's biggest Q4 2018 reduction was Molina Healthcare, cutting an estimated $26.6M.
  • Rock Springs Capital Management fully exited AbbVie in Q4 2018, selling an estimated $30.7M.
  • Rock Springs Capital Management's ten largest holdings make up 33% of its $2.12B portfolio in Q4 2018.
  • Rock Springs Capital Management opened 6 new positions and closed 17 in Q4 2018.
  • Rock Springs Capital Management's portfolio value fell 23% quarter-over-quarter to $2.12B.

Based on Rock Springs Capital Management's 13F filing for Q4 2018, filed 14 Feb 2019.