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Rock Springs Capital Management Portfolio holdings

AUM $2.05B
1-Year Est. Return 161.37%
This Fund
S&P 500
This Quarter Est. Return
+15.5%
1 Year Est. Return
+161.37%
3 Year Est. Return
+342.48%
5 Year Est. Return
+531.16%
10 Year Est. Return
+6,258.71%
AUM
$2.17B
AUM Growth
+$187M
Cap. Flow
+$905K
Cap. Flow %
0.04%
Top 10 Hldgs %
27.68%
Holding
163
New
13
Increased
39
Reduced
20
Closed
16

Top Buys

Rank Stock Value
1
UNH icon
UnitedHealth
UNH
+$28M
2
IRTC icon
iRhythm Holdings
IRTC
+$17.5M
3
PBYI icon
Puma Biotechnology
PBYI
+$13.4M
4
PTLA
Portola Pharmaceuticals, Inc.
PTLA
+$10.8M
5
MOH icon
Molina Healthcare
MOH
+$10.4M

Top Sells

Rank Stock Value
1
AGN
Allergan plc
AGN
+$37.9M
2
HUM icon
Humana
HUM
+$31.9M
3
HOLX
Hologic
HOLX
+$19.1M
4
MDT icon
Medtronic
MDT
+$12.7M
5
WBA
Walgreens Boots Alliance
WBA
+$6.74M

Sector Composition

Rank Sector Weight
1 Healthcare 94.37%
2 Financials 3.75%
3 Miscellaneous 0.99%
4 Consumer Discretionary 0.9%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
UNH icon
1
UnitedHealth
UNH
$337B
$89.9M 4.15%
459,000
+145,000
+46% +$28M
ALXN
2
DELISTED
Alexion Pharmaceuticals
ALXN
$65M 3%
463,000
– –
TSRO
3
DELISTED
TESARO, Inc.
TSRO
$63.9M 2.95%
495,250
+4,750
+1% +$590K
AET
4
DELISTED
Aetna Inc
AET
$63.4M 2.93%
399,000
+11,000
+3% +$1.72M
ACHC icon
5
Acadia Healthcare
ACHC
$2.55B
$62.3M 2.88%
1,305,000
-45,000
-3% -$2.19M
ONCE
6
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
$53.2M 2.46%
597,000
-28,000
-4% -$2.13M
AAAP
7
DELISTED
Advanced Accelerator Applications S.A.
AAAP
$53M 2.45%
784,500
-55,500
-7% -$2.7M
CI icon
8
Cigna
CI
$76.3B
$50.5M 2.33%
270,000
– –
ISRG icon
9
Intuitive Surgical
ISRG
$133B
$50.2M 2.32%
432,000
– –
MRK icon
10
Merck
MRK
$355B
$48.5M 2.24%
794,384
– –
PCRX icon
11
Pacira BioSciences
PCRX
$960M
$40.9M 1.88%
1,088,000
+45,500
+4% +$1.83M
PBYI icon
12
Puma Biotechnology
PBYI
$477M
$39.5M 1.82%
330,000
+144,000
+77% +$13.4M
CELG
13
DELISTED
Celgene Corp
CELG
$38.3M 1.77%
262,500
+17,500
+7% +$2.38M
GWPH
14
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
$37.9M 1.75%
373,000
+7,500
+2% +$803K
PRAH
15
DELISTED
PRA Health Sciences, Inc.
PRAH
$36.4M 1.68%
477,500
+15,000
+3% +$1.13M
RDUS
16
DELISTED
Radius Health, Inc.
RDUS
$36.4M 1.68%
943,000
+32,750
+4% +$1.29M
WCG
17
DELISTED
Wellcare Health Plans, Inc.
WCG
$33.9M 1.56%
197,500
– –
MOH icon
18
Molina Healthcare
MOH
$10.8B
$29.1M 1.34%
422,500
+159,000
+60% +$10.4M
ONC
19
BeOne Medicines Ltd
ONC
$39.2B
$29M 1.34%
280,000
+15,000
+6% +$1.12M
PEN icon
20
Penumbra
PEN
$12.5B
$28M 1.29%
310,500
– –
NBIX icon
21
Neurocrine Biosciences
NBIX
$15.2B
$27M 1.24%
440,000
+21,000
+5% +$1.11M
LOXO
22
DELISTED
Loxo Oncology, Inc
LOXO
$26.3M 1.21%
285,500
-2,500
-0.9% -$194K
EPZM
23
DELISTED
Epizyme, Inc
EPZM
$25.7M 1.19%
1,350,000
+175,000
+15% +$2.67M
MDCO
24
DELISTED
Medicines Co
MDCO
$25.6M 1.18%
690,000
-4,446
-0.6% -$164K
GILD icon
25
Gilead Sciences
GILD
$181B
$25.4M 1.17%
313,400
– –
1
2 3 4 5

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Rock Springs Capital Management's Q3 2017 Portfolio in Review

As of Q3 2017, Rock Springs Capital Management held 163 positions worth $2.17B, up 9.5% from $1.98B the previous quarter. Its ten largest holdings account for 28% of the portfolio.

Rock Springs Capital Management's Q3 2017 filing shows 13 new, 39 increased, 20 reduced and 16 closed positions. Its largest new stake was iRhythm Holdings: 386,000 shares worth $20M. The largest sale was Allergan plc, an estimated $37.9M.

By sector, the portfolio is most concentrated in Healthcare at 94% of assets, up from 93% a quarter earlier, followed by Financials and Miscellaneous.

  • Rock Springs Capital Management's largest Q3 2017 buy was iRhythm Holdings: 386,000 shares worth $20M.
  • Rock Springs Capital Management added most to UnitedHealth in Q3 2017, an estimated $28M increase.
  • Rock Springs Capital Management's biggest Q3 2017 reduction was Medtronic, cutting an estimated $12.7M.
  • Rock Springs Capital Management fully exited Allergan plc in Q3 2017, selling an estimated $37.9M.
  • Rock Springs Capital Management's ten largest holdings make up 28% of its $2.17B portfolio in Q3 2017.
  • Rock Springs Capital Management opened 13 new positions and closed 16 in Q3 2017.
  • Rock Springs Capital Management's portfolio value rose 9.5% quarter-over-quarter to $2.17B.

Based on Rock Springs Capital Management's 13F filing for Q3 2017, filed 14 Nov 2017.