Arkolith/Funds/RTW INVESTMENTS, LP

RTW INVESTMENTS, LP

CIK: 1493215Q1 2026
Active Filer
Portfolio Value
$10.0B
Positions
100
New Buys
9
12 sold
Changes
30 ↑ / 13 ↓

Top HoldingsQ1 2026

100 total positions
#SecurityValueShares% PortChangeΔ Shares
1MADRIGAL PHARMACEUTICALS INC
COM
$1.0B1.99M10.4%
HELD
0
2INSMED INC
COM PAR $.01
$791.9M4.84M7.9%
ADDED
+1
3PROTAGONIST THERAPEUTICS INC
COM
$533.2M5.06M5.3%
HELD
0
4PTC THERAPEUTICS INC
COM
$527.8M7.75M5.3%
HELD
0
5ARGENX SE
SPONSORED ADR
$518.1M709.4K5.2%
ADDED
+35.9K
6CG ONCOLOGY INC
COM
$472.7M6.98M4.7%
ADDED
+4.97M
7CELCUITY INC
COM
$346.9M3.04M3.5%
ADDED
+2.49M
8TANGO THERAPEUTICS INC
COM
$278.2M13.30M2.8%
ADDED
+11.81M
9ERASCA INC
COM
$261.4M16.16M2.6%
ADDED
+16.01M
10NATERA INC
COM
$250.0M1.25M2.5%
REDUCED
-250,000
11RADNET INC
COM
$239.5M4.29M2.4%
ADDED
+346.5K
12TARSUS PHARMACEUTICALS INC
COM
$234.7M3.35M2.3%
ADDED
+10.7K
13APOGEE THERAPEUTICS INC
COM
$234.2M2.78M2.3%
ADDED
+70.0K
14SPYRE THERAPEUTICS INC
COM NEW
$210.4M4.17M2.1%
HELD
0
15COGENT BIOSCIENCES INC
COM
$210.1M5.46M2.1%
REDUCED
-2,133,566
16IRHYTHM HOLDINGS INC
COM
$196.9M1.67M2.0%
ADDED
+486.5K
17STOKE THERAPEUTICS INC
COM
$183.1M5.62M1.8%
ADDED
+76.7K
18CYTOKINETICS INC
COM NEW
$179.4M2.72M1.8%
HELD
0
19ACADIA PHARMACEUTICALS INC
COM
$159.0M7.14M1.6%
HELD
0
20
ESTABLISHMENT LABS HLDGS INC
COM
$150.8M2.66M1.5%
ADDED
+66.9K
21APELLIS PHARMACEUTICALS INC
COM
$148.2M3.69M1.5%
REDUCED
-3,981,719
22IMMUNOCORE HLDGS PLC
ADS
$146.8M4.87M1.5%
HELD
0
23REPLIGEN CORP
COM
$142.1M1.21M1.4%
ADDED
+142.0K
24NEUROCRINE BIOSCIENCES INC
COM
$139.9M1.06M1.4%
HELD
0
25GUARDANT HEALTH INC
COM
$136.8M1.48M1.4%
HELD
0
Showing top 25 of 100 positions

Filing History

Q1 202688 pos
$10.0B
Q4 202591 pos
$10.0B

Data Source

Holdings data sourced from SEC EDGAR 13F-HR filings. Updated quarterly, approximately 45 days after quarter end. All data is public domain.

Last filed: May 15, 2026