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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
-4.17%
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
$1.49B
AUM Growth
-$101M
Cap. Flow
+$10.3M
Cap. Flow %
0.69%
Top 10 Hldgs %
30.22%
Holding
143
New
5
Increased
56
Reduced
18
Closed
10

Top Buys

Rank Stock Value
1
UNH icon
UnitedHealth
UNH
+$24.6M
2
ALXN
Alexion Pharmaceuticals
ALXN
+$24.2M
3
RARX
Ra Pharmaceuticals, Inc. Common Stock
RARX
+$11.2M
4
BMY icon
Bristol-Myers Squibb
BMY
+$10.9M
5
MRK icon
Merck
MRK
+$9.97M

Top Sells

Rank Stock Value
1
PFE icon
Pfizer
PFE
+$35.8M
2
HCA icon
HCA Healthcare
HCA
+$32.5M
3
MCK icon
McKesson
MCK
+$13.7M
4
ISEE
IVERIC bio, Inc. Common Stock
ISEE
+$6.83M
5
GI
EndoChoice Holdings, Inc.
GI
+$5.77M

Sector Composition

Rank Sector Weight
1 Healthcare 81.35%
2 Financials 4.56%
3 Industrials 0.44%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
DARE icon
126
Dare Bioscience
DARE
$21M
$443K 0.03%
5,208
– –
INFI
127
DELISTED
Infinity Pharmaceuticals, Inc.
INFI
$365K 0.02%
270,000
– –
OREX
128
DELISTED
Orexigen Therapeutics, Inc.
OREX
$288K 0.02%
165,300
– –
ANTH
129
DELISTED
Anthera Pharmaceuticals, Inc.
ANTH
$247K 0.02%
47,500
-8,750
-16% -$151K
HCA icon
130
HCA Healthcare
HCA
$89.5B
– –
-430,000
Closed -$32.5M
MCK icon
131
McKesson
MCK
$101B
– –
-82,000
Closed -$13.7M
MD icon
132
Pediatrix Medical
MD
$2.2B
– –
-50,000
Closed -$3.31M
OPCH icon
133
Option Care Health
OPCH
$3.56B
– –
-372,623
Closed -$4.31M
PFE icon
134
Pfizer
PFE
$153B
– –
-1,112,813
Closed -$35.8M
ISEE
135
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
– –
-148,000
Closed -$6.83M
CERN
136
DELISTED
Cerner Corp
CERN
– –
-20,000
Closed -$1.24M
INSY
137
DELISTED
Insys Therapeutics, Inc.
INSY
– –
-100,000
Closed -$1.18M
AMSG
138
DELISTED
Amsurg Corp
AMSG
– –
-32,500
Closed -$2.18M
GI
139
DELISTED
EndoChoice Holdings, Inc.
GI
– –
-722,500
Closed -$5.77M
2 3 4 5
6

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Rock Springs Capital Management's Q4 2016 Portfolio in Review

As of Q4 2016, Rock Springs Capital Management held 143 positions worth $1.49B, down 6.3% from $1.6B the previous quarter. Its ten largest holdings account for 30% of the portfolio.

Rock Springs Capital Management's Q4 2016 filing shows 5 new, 56 increased, 18 reduced and 10 closed positions. Its largest new stake was UnitedHealth: 165,000 shares worth $26.4M. The largest sale was Pfizer, an estimated $35.8M.

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

  • Rock Springs Capital Management's largest Q4 2016 buy was UnitedHealth: 165,000 shares worth $26.4M.
  • Rock Springs Capital Management added most to Alexion Pharmaceuticals in Q4 2016, an estimated $24.2M increase.
  • Rock Springs Capital Management's biggest Q4 2016 reduction was Gilead Sciences, cutting an estimated $5.02M.
  • Rock Springs Capital Management fully exited Pfizer in Q4 2016, selling an estimated $35.8M.
  • Rock Springs Capital Management's ten largest holdings make up 30% of its $1.49B portfolio in Q4 2016.
  • Rock Springs Capital Management opened 5 new positions and closed 10 in Q4 2016.
  • Rock Springs Capital Management's portfolio value fell 6.3% quarter-over-quarter to $1.49B.

Based on Rock Springs Capital Management's 13F filing for Q4 2016, filed 14 Feb 2017.