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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
+10.65%
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
$4.58B
AUM Growth
-$133M
Cap. Flow
-$75.4M
Cap. Flow %
-1.64%
Top 10 Hldgs %
23.53%
Holding
172
New
18
Increased
60
Reduced
32
Closed
21

Top Buys

Rank Stock Value
1
IMCR icon
Immunocore
IMCR
+$102M
2
BOLT icon
Bolt Biotherapeutics
BOLT
+$50.7M
3
FPRX
Five Prime Therapeutics, Inc.
FPRX
+$48.4M
4
CGEM icon
Cullinan Oncology
CGEM
+$43.7M
5
AZN icon
AstraZeneca
AZN
+$32.7M

Top Sells

Rank Stock Value
1
NBIX icon
Neurocrine Biosciences
NBIX
+$58.7M
2
ALXN
Alexion Pharmaceuticals
ALXN
+$47.9M
3
UNH icon
UnitedHealth
UNH
+$45M
4
CNC icon
Centene
CNC
+$43.8M
5
IMVT icon
Immunovant
IMVT
+$41.2M

Sector Composition

Rank Sector Weight
1 Healthcare 93.74%
2 Consumer Staples 1.75%
3 Industrials 0.62%
4 Financials 0.12%
5 Consumer Discretionary 0%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
HQY icon
151
HealthEquity
HQY
$8.93B
– –
-75,000
Closed -$5.23M
IMVT icon
152
Immunovant
IMVT
$8.24B
– –
-891,000
Closed -$41.2M
INCY icon
153
Incyte
INCY
$24.6B
– –
-300,000
Closed -$26.1M
ITOS
154
DELISTED
iTeos Therapeutics
ITOS
– –
-159,957
Closed -$5.41M
JAZZ icon
155
Jazz Pharmaceuticals
JAZZ
$16.7B
– –
-87,500
Closed -$14.4M
OSW icon
156
OneSpaWorld
OSW
$2.62B
– –
-690,000
Closed -$7M
QURE icon
157
uniQure
QURE
$3.2B
– –
-208,500
Closed -$7.53M
TXG icon
158
10x Genomics
TXG
$7.44B
– –
-76,000
Closed -$10.8M
MYOV
159
DELISTED
Myovant Sciences Ltd.
MYOV
– –
-515,000
Closed -$14.2M
ODT
160
DELISTED
Odonate Therapeutics, Inc. Common Stock
ODT
– –
-377,700
Closed -$7.25M
ALXN
161
DELISTED
Alexion Pharmaceuticals
ALXN
– –
-306,750
Closed -$47.9M
GWPH
162
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
– –
-119,188
Closed -$13.8M
PANA.U
163
DELISTED
Panacea Acquisition Corp. Units, each consisting of one share of Class A common stock and one-third
PANA.U
– –
-402,088
Closed -$5.13M
CO
164
DELISTED
Global Cord Blood Corporation
CO
– –
-775,000
Closed -$2.88M
3 4 5 6
7

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Rock Springs Capital Management's Q1 2021 Portfolio in Review

As of Q1 2021, Rock Springs Capital Management held 172 positions worth $4.58B, down 2.8% from $4.72B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

Rock Springs Capital Management's Q1 2021 filing shows 18 new, 60 increased, 32 reduced and 21 closed positions. Its largest new stake was Immunocore: 2,292,285 shares worth $97.6M. The largest sale was Neurocrine Biosciences, an estimated $58.7M.

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

  • Rock Springs Capital Management's largest Q1 2021 buy was Immunocore: 2,292,285 shares worth $97.6M.
  • Rock Springs Capital Management added most to Five Prime Therapeutics, Inc. in Q1 2021, an estimated $48.4M increase.
  • Rock Springs Capital Management's biggest Q1 2021 reduction was Neurocrine Biosciences, cutting an estimated $58.7M.
  • Rock Springs Capital Management fully exited Alexion Pharmaceuticals in Q1 2021, selling an estimated $47.9M.
  • Rock Springs Capital Management's ten largest holdings make up 24% of its $4.58B portfolio in Q1 2021.
  • Rock Springs Capital Management opened 18 new positions and closed 21 in Q1 2021.
  • Rock Springs Capital Management's portfolio value fell 2.8% quarter-over-quarter to $4.58B.

Based on Rock Springs Capital Management's 13F filing for Q1 2021, filed 17 May 2021.