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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
+5.62%
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
$2.2B
AUM Growth
+$36.4M
Cap. Flow
+$49.6M
Cap. Flow %
2.25%
Top 10 Hldgs %
26.49%
Holding
159
New
12
Increased
46
Reduced
21
Closed
14

Top Buys

Rank Stock Value
1
TFX icon
Teleflex
TFX
+$23.1M
2
SYK icon
Stryker
SYK
+$19.3M
3
HOLX
Hologic
HOLX
+$13.4M
4
ZBH icon
Zimmer Biomet
ZBH
+$11.4M
5
MOH icon
Molina Healthcare
MOH
+$10.4M

Top Sells

Rank Stock Value
1
AET
Aetna Inc
AET
+$27.5M
2
DHR icon
Danaher
DHR
+$19.3M
3
MDT icon
Medtronic
MDT
+$19.2M
4
BCR
CR Bard Inc.
BCR
+$18.4M
5
WCG
Wellcare Health Plans, Inc.
WCG
+$12.3M

Sector Composition

Rank Sector Weight
1 Healthcare 85.16%
2 Financials 2.8%
3 Consumer Discretionary 0.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
WMGI
51
DELISTED
Wright Medical Group Inc
WMGI
$15.5M 0.71%
700,000
+30,000
+4% +$740K
KYNB
52
Kyntra Bio
KYNB
$28.2M
$15.4M 0.7%
13,000
– –
ARDX icon
53
Ardelyx
ARDX
$988M
$15M 0.68%
2,275,557
+275,557
+14% +$1.63M
BAX icon
54
Baxter International
BAX
$13.8B
$14.9M 0.67%
230,000
– –
ALGN icon
55
Align Technology
ALGN
$11.8B
$14.8M 0.67%
66,750
+5,450
+9% +$1.24M
ZBH icon
56
Zimmer Biomet
ZBH
$18.2B
$14.4M 0.65%
122,570
+100,837
+464% +$11.4M
SRPT icon
57
Sarepta Therapeutics
SRPT
$1.8B
$14.4M 0.65%
258,000
-1,200
-0.5% -$63.6K
ANAB icon
58
AnaptysBio
ANAB
$1.65B
$14.3M 0.65%
142,400
-7,600
-5% -$559K
HOLX
59
DELISTED
Hologic
HOLX
$14.3M 0.65%
+335,000
New +$13.4M
AXGN icon
60
Axogen
AXGN
$2.41B
$13.5M 0.61%
477,500
+77,500
+19% +$1.83M
FOLD
61
DELISTED
Amicus Therapeutics
FOLD
$13.1M 0.59%
910,000
– –
EHC icon
62
Encompass Health
EHC
$12.3B
$13.1M 0.59%
333,105
– –
ALDR
63
DELISTED
Alder Biopharmaceuticals
ALDR
$12.1M 0.55%
1,055,000
+180,000
+21% +$2.01M
NVTA
64
DELISTED
Invitae Corporation
NVTA
$11.9M 0.54%
1,306,000
– –
DERM
65
DELISTED
Dermira, Inc.
DERM
$11.7M 0.53%
420,000
+20,000
+5% +$530K
PRTA icon
66
Prothena Corp
PRTA
$437M
$11.6M 0.53%
310,000
+500
+0.2% +$25.5K
ASND icon
67
Ascendis Pharma A/S
ASND
$16.7B
$11.2M 0.51%
280,000
– –
XENT
68
DELISTED
Intersect ENT, Inc
XENT
$11.2M 0.51%
345,000
– –
BMRN icon
69
BioMarin Pharmaceuticals
BMRN
$12.4B
$11.1M 0.51%
125,000
– –
AIMT
70
DELISTED
Aimmune Therapeutics
AIMT
$11.1M 0.5%
293,000
– –
BPMC
71
DELISTED
Blueprint Medicines
BPMC
$11M 0.5%
146,500
+60,000
+69% +$4.22M
JUNO
72
DELISTED
Juno Therapeutics, Inc.
JUNO
$10.5M 0.48%
230,000
+5,000
+2% +$249K
ODT
73
DELISTED
Odonate Therapeutics, Inc. Common Stock
ODT
$10.3M 0.47%
+410,000
New +$9.69M
ACRS icon
74
Aclaris Therapeutics
ACRS
$851M
$10.2M 0.46%
415,000
-25,000
-6% -$609K
RIGL icon
75
Rigel Pharmaceuticals
RIGL
$738M
$9.6M 0.44%
247,500
+147,500
+148% +$5.61M
1 2
3
4 5

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Rock Springs Capital Management's Q4 2017 Portfolio in Review

As of Q4 2017, Rock Springs Capital Management held 159 positions worth $2.2B, up 1.7% from $2.17B the previous quarter. Its ten largest holdings account for 26% of the portfolio.

Rock Springs Capital Management's Q4 2017 filing shows 12 new, 46 increased, 21 reduced and 14 closed positions. Its largest new stake was Teleflex: 91,750 shares worth $22.8M. The largest sale was Aetna Inc, an estimated $27.5M.

By sector, the portfolio is most concentrated in Healthcare at 85% of assets, up from 80% a quarter earlier, followed by Financials and Consumer Discretionary.

  • Rock Springs Capital Management's largest Q4 2017 buy was Teleflex: 91,750 shares worth $22.8M.
  • Rock Springs Capital Management added most to Zimmer Biomet in Q4 2017, an estimated $11.4M increase.
  • Rock Springs Capital Management's biggest Q4 2017 reduction was Aetna Inc, cutting an estimated $27.5M.
  • Rock Springs Capital Management fully exited Danaher in Q4 2017, selling an estimated $19.3M.
  • Rock Springs Capital Management's ten largest holdings make up 26% of its $2.2B portfolio in Q4 2017.
  • Rock Springs Capital Management opened 12 new positions and closed 14 in Q4 2017.
  • Rock Springs Capital Management's portfolio value rose 1.7% quarter-over-quarter to $2.2B.

Based on Rock Springs Capital Management's 13F filing for Q4 2017, filed 14 Feb 2018.