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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
+16.42%
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
$1.73B
AUM Growth
+$239M
Cap. Flow
+$39.4M
Cap. Flow %
2.27%
Top 10 Hldgs %
27.21%
Holding
142
New
9
Increased
33
Reduced
17
Closed
2

Top Buys

Rank Stock Value
1
HUM icon
Humana
HUM
+$27.4M
2
JNJ icon
Johnson & Johnson
JNJ
+$20.9M
3
PCRX icon
Pacira BioSciences
PCRX
+$12.4M
4
AFAM
Almost Family Inc
AFAM
+$10.8M
5
OBSV
ObsEva SA Ordinary Shares
OBSV
+$10.3M

Top Sells

Rank Stock Value
1
AET
Aetna Inc
AET
+$27.7M
2
TSRO
TESARO, Inc.
TSRO
+$22.6M
3
ACRS icon
Aclaris Therapeutics
ACRS
+$12.3M
4
MEDP icon
Medpace
MEDP
+$4.87M
5
ARIA
Ariad Pharmaceuticals Inc
ARIA
+$3.11M

Sector Composition

Rank Sector Weight
1 Healthcare 82.21%
2 Financials 2.45%
3 Consumer Discretionary 0.63%
4 Industrials 0.41%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TSRO
1
DELISTED
TESARO, Inc.
TSRO
$73.1M 4.22%
474,900
-138,600
-23% -$22.6M
ACHC icon
2
Acadia Healthcare
ACHC
$2.52B
$55.6M 3.21%
1,275,000
+117,500
+10% +$4.77M
ALXN
3
DELISTED
Alexion Pharmaceuticals
ALXN
$55.4M 3.2%
456,900
-8,100
-2% -$1.04M
MRK icon
4
Merck
MRK
$322B
$47.7M 2.75%
786,000
– –
PCRX icon
5
Pacira BioSciences
PCRX
$1.04B
$45.6M 2.63%
1,000,000
+287,000
+40% +$12.4M
GWPH
6
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
$43.1M 2.49%
356,500
+500
+0.1% +$61.3K
AGN
7
DELISTED
Allergan plc
AGN
$39.7M 2.29%
166,000
– –
CI icon
8
Cigna
CI
$78.4B
$39.6M 2.28%
270,000
+18,000
+7% +$2.65M
ISRG icon
9
Intuitive Surgical
ISRG
$127B
$36.8M 2.12%
432,000
– –
RDUS
10
DELISTED
Radius Health, Inc.
RDUS
$35.2M 2.03%
910,250
– –
MDCO
11
DELISTED
Medicines Co
MDCO
$34.2M 1.98%
700,000
+500
+0.1% +$22.8K
AAAP
12
DELISTED
Advanced Accelerator Applications S.A.
AAAP
$33.9M 1.96%
850,000
-80,000
-9% -$2.76M
ONCE
13
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
$33.3M 1.92%
625,000
– –
WCG
14
DELISTED
Wellcare Health Plans, Inc.
WCG
$32.9M 1.9%
234,500
– –
CELG
15
DELISTED
Celgene Corp
CELG
$30.2M 1.74%
242,500
– –
PRAH
16
DELISTED
PRA Health Sciences, Inc.
PRAH
$29.8M 1.72%
457,500
+157,500
+53% +$9.28M
AET
17
DELISTED
Aetna Inc
AET
$28.1M 1.62%
220,000
-221,000
-50% -$27.7M
LLY icon
18
Eli Lilly
LLY
$1.08T
$27.3M 1.58%
325,000
– –
HUM icon
19
Humana
HUM
$43.9B
$27.3M 1.58%
+132,500
New +$27.4M
UNH icon
20
UnitedHealth
UNH
$382B
$27.1M 1.56%
165,000
– –
PEN icon
21
Penumbra
PEN
$12.6B
$25.9M 1.5%
310,500
+15,000
+5% +$1.14M
ARDX icon
22
Ardelyx
ARDX
$1.24B
$25.3M 1.46%
2,000,000
– –
BMY icon
23
Bristol-Myers Squibb
BMY
$129B
$24.6M 1.42%
452,600
+2,600
+0.6% +$143K
SHPG
24
DELISTED
Shire pic
SHPG
$24.2M 1.4%
138,900
+1,700
+1% +$297K
INCY icon
25
Incyte
INCY
$25.4B
$22.6M 1.3%
169,000
– –
1
2 3 4 5

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Rock Springs Capital Management's Q1 2017 Portfolio in Review

As of Q1 2017, Rock Springs Capital Management held 142 positions worth $1.73B, up 16% from $1.49B the previous quarter. Its ten largest holdings account for 27% of the portfolio.

Rock Springs Capital Management's Q1 2017 filing shows 9 new, 33 increased, 17 reduced and 2 closed positions. Its largest new stake was Humana: 132,500 shares worth $27.3M. The largest sale was Aetna Inc, an estimated $27.7M.

By sector, the portfolio is most concentrated in Healthcare at 82% of assets, up from 81% a quarter earlier, followed by Financials and Consumer Discretionary.

  • Rock Springs Capital Management's largest Q1 2017 buy was Humana: 132,500 shares worth $27.3M.
  • Rock Springs Capital Management added most to Pacira BioSciences in Q1 2017, an estimated $12.4M increase.
  • Rock Springs Capital Management's biggest Q1 2017 reduction was Aetna Inc, cutting an estimated $27.7M.
  • Rock Springs Capital Management fully exited Medpace in Q1 2017, selling an estimated $4.87M.
  • Rock Springs Capital Management's ten largest holdings make up 27% of its $1.73B portfolio in Q1 2017.
  • Rock Springs Capital Management opened 9 new positions and closed 2 in Q1 2017.
  • Rock Springs Capital Management's portfolio value rose 16% quarter-over-quarter to $1.73B.

Based on Rock Springs Capital Management's 13F filing for Q1 2017, filed 15 May 2017.