2026 Q1 Portfolio Activity
In 2026 Q1, RTW INVESTMENTS, LP maintained a portfolio of 99 distinct positions. The most significant new addition was WAYSTAR HLDG CORP, now representing 0.39% of the total fund value. They heavily accumulated shares in CG ONCOLOGY INC, increasing the position by 247.1%. Conversely, RTW INVESTMENTS, LP completely exited their position in PENUMBRA INC.
Position History
hover any row below to update
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Total Positions
99
Quarter
2026 Q1
Top Holding
MDGL (10.4%)
Top 10 Concentration
50.0%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 99
RTW INVESTMENTS, LP Full Holdings List — 2026 Q1
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
MDGL
MADRIGAL PHARMA...
|
Healthcare | 10.38% | 11.63% |
#1
Prev: #1
|
7.0 |
—
|
no change | no change |
P
S
|
1,993,687 | $1,043,635,334 |
$258.33
+88.5%
|
2023 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | ||
|
INSM
INSMED INC
|
Healthcare | 7.88% | 8.44% |
#2
Prev: #2
|
5.2 |
—
|
1 | 0.0% |
P
S
|
4,842,880 | $791,907,738 | 2023 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
PTGX
PROTAGONIST THE...
|
Healthcare | 5.31% | 4.43% |
#3
2
Prev: #5
|
4.1 |
—
|
no change | no change |
P
S
|
5,059,053 | $533,224,186 | 2019 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
PTCT
PTC THERAPEUTIC...
|
Healthcare | 5.25% | 5.89% |
#4
1
Prev: #3
|
3.6 |
—
|
no change | no change |
P
S
|
7,746,415 | $527,763,254 | 2016 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ARGX
ARGENX SE
|
Healthcare | 5.16% | 5.67% |
#5
1
Prev: #4
|
4.6 |
—
|
35,949 | 5.3% |
P
S
|
709,446 | $518,072,942 | 2017 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
CGON
CG ONCOLOGY INC
|
Healthcare | 4.70% | 0.84% |
#6
28
Prev: #34
|
4.9 |
—
|
4,972,681 | 247.1% |
P
S
|
6,984,808 | $472,731,805 | 2024 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
CELC
CELCUITY INC
|
Healthcare | 3.45% | 0.55% |
#7
40
Prev: #47
|
4.4 |
—
|
2,489,461 | 452.5% |
P
S
|
3,039,621 | $346,942,341 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TNGX
TANGO THERAPEUT...
|
Healthcare | 2.77% | 0.13% |
#8
59
Prev: #67
|
4.1 |
—
|
11,809,392 | 791.9% |
P
S
|
13,300,620 | $278,248,970 | 2021 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ERAS
ERASCA INC
|
Healthcare | 2.60% | 0.01% |
#9
81
Prev: #90
|
4.0 |
—
|
16,010,524 | 10917.4% |
P
S
|
16,157,175 | $261,423,092 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
NTRA
NATERA INC
|
Healthcare | 2.49% | 3.44% |
#10
4
Prev: #6
|
1.5 |
—
|
-250,000 | -16.7% |
P
S
|
1,250,000 | $249,987,500 | 2015 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
RDNT
RADNET INC
|
Healthcare | 2.38% | 2.81% |
#11
4
Prev: #7
|
3.0 |
—
|
346,500 | 8.8% |
P
S
|
4,285,000 | $239,488,650 | 2023 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TARS
TARSUS PHARMACE...
|
Healthcare | 2.34% | 2.74% |
#12
4
Prev: #8
|
1.4 |
—
|
10,705 | 0.3% |
P
S
|
3,346,025 | $234,723,654 | 2020 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
APGE
APOGEE THERAPEU...
|
Healthcare | 2.33% | 2.05% |
#13
1
Prev: #12
|
1.4 |
—
|
70,000 | 2.6% |
P
S
|
2,782,097 | $234,169,104 | 2023 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
SYRE
SPYRE THERAPEUT...
|
Healthcare | 2.09% | 1.37% |
#14
9
Prev: #23
|
1.8 |
—
|
no change | no change |
P
S
|
4,171,996 | $210,435,478 | 2023 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
COGT
COGENT BIOSCIEN...
|
Healthcare | 2.09% | 2.70% |
#15
6
Prev: #9
|
0.8 |
—
|
-2,133,566 | -28.1% |
P
S
|
5,458,675 | $210,104,401 | 2025 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
IRTC
IRHYTHM HOLDING...
|
Healthcare | 1.96% | 2.10% |
#16
5
Prev: #11
|
3.3 |
—
|
486,510 | 41.2% |
P
S
|
1,668,500 | $196,916,370 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
STOK
STOKE THERAPEUT...
|
Healthcare | 1.82% | 1.76% |
#17
1
Prev: #16
|
1.2 |
—
|
76,669 | 1.4% |
P
S
|
5,623,525 | $183,101,974 | 2019 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
CYTK
CYTOKINETICS IN...
|
Healthcare | 1.78% | 1.73% |
#18
Prev: #18
|
1.7 |
—
|
no change | no change |
P
S
|
2,721,158 | $179,351,524 | 2020 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ACAD
ACADIA PHARMACE...
|
Healthcare | 1.58% | 1.91% |
#19
5
Prev: #14
|
1.6 |
—
|
no change | no change |
P
S
|
7,144,524 | $159,037,104 | 2022 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ESTA
ESTABLISHMENT L...
|
Healthcare | 1.50% | 1.89% |
#20
5
Prev: #15
|
1.1 |
—
|
66,864 | 2.6% |
P
S
|
2,655,695 | $150,790,362 | 2018 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
APLS
APELLIS PHARMAC...
|
Healthcare | 1.48% | 1.93% |
#21
8
Prev: #13
|
0.6 |
—
|
-3,981,719 | -51.9% |
P
S
|
3,685,045 | $148,249,360 | 2021 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
IMCR
IMMUNOCORE HLDG...
|
Healthcare | 1.46% | 1.69% |
#22
3
Prev: #19
|
1.6 |
—
|
no change | no change |
P
S
|
4,869,798 | $146,824,410 | 2021 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
RGEN
REPLIGEN CORP
|
Healthcare | 1.41% | 1.75% |
#23
6
Prev: #17
|
2.6 |
—
|
142,000 | 13.3% |
P
S
|
1,206,000 | $142,090,920 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
NBIX
NEUROCRINE BIOS...
|
Healthcare | 1.39% | 1.51% |
#24
2
Prev: #22
|
1.6 |
—
|
no change | no change |
P
S
|
1,062,072 | $139,917,365 | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
GH
GUARDANT HEALTH...
|
Healthcare | 1.36% | 1.52% |
#25
4
Prev: #21
|
1.5 |
—
|
no change | no change |
P
S
|
1,481,033 | $136,803,018 | 2020 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
IMTX
IMMATICS N.V
|
Healthcare | 1.26% | 1.20% |
#26
1
Prev: #25
|
2.5 |
—
|
1,435,986 | 12.6% |
P
S
|
12,869,340 | $126,634,306 | 2020 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ZLAB
ZAI LAB LTD
|
Healthcare | 1.23% | 1.23% |
#27
3
Prev: #24
|
1.0 |
—
|
-385,000 | -5.5% |
P
S
|
6,574,032 | $123,657,542 | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
BLTE
BELITE BIO INC
|
Healthcare | 1.13% | 1.15% |
#28
2
Prev: #26
|
1.5 |
—
|
no change | no change |
P
S
|
715,332 | $114,052,534 | 2025 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ISRG
INTUITIVE SURGI...
|
Healthcare | 1.01% | 0.57% |
#29
16
Prev: #45
|
3.4 |
—
|
118,772 | 117.3% |
P
S
|
220,000 | $101,417,800 | 2023 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ORKA
ORUKA THERAPEUT...
|
Healthcare | 1.00% | 0.62% |
#30
12
Prev: #42
|
1.4 |
—
|
no change | no change |
P
S
|
2,058,148 | $100,952,159 | 2024 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
GHRS
GH RESEARCH PLC
|
Healthcare | 0.83% | 0.75% |
#31
7
Prev: #38
|
1.3 |
—
|
no change | no change |
P
S
|
5,933,815 | $83,429,439 | 2021 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
XNCR
XENCOR INC
|
Healthcare | 0.81% | 1.04% |
#32
4
Prev: #28
|
1.3 |
—
|
no change | no change |
P
S
|
6,777,461 | $81,736,180 | 2024 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
URGN
UROGEN PHARMA L...
|
Healthcare | 0.81% | 1.07% |
#33
6
Prev: #27
|
1.3 |
—
|
no change | no change |
P
S
|
4,543,895 | $81,699,232 | 2021 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
CNTA
CENTESSA PHARMA...
|
Healthcare | 0.81% | 0.45% |
#34
16
Prev: #50
|
2.3 |
—
|
263,338 | 14.7% |
P
S
|
2,054,175 | $81,591,831 | 2024 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
IMVT
IMMUNOVANT INC
|
Healthcare | 0.79% | 0.81% |
#35
1
Prev: #36
|
0.8 |
—
|
-1 | -0.0% |
P
S
|
3,177,849 | $78,937,769 | 2019 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
RARE
ULTRAGENYX PHAR...
|
Healthcare | 0.76% | 0.69% |
#36
4
Prev: #40
|
2.8 |
—
|
648,656 | 21.6% |
P
S
|
3,648,795 | $76,442,255 | 2021 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
HNGE
HINGE HEALTH IN...
|
Healthcare | 0.74% | 0.16% |
#37
26
Prev: #63
|
3.3 |
—
|
1,576,500 | 446.0% |
P
S
|
1,930,000 | $74,420,800 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
CSTL
CASTLE BIOSCIEN...
|
Healthcare | 0.67% | 0.82% |
#38
3
Prev: #35
|
2.8 |
—
|
643,098 | 30.4% |
P
S
|
2,758,335 | $67,717,124 | 2019 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
RCKT
ROCKET PHARMACE...
|
Healthcare | 0.63% | 0.62% |
#39
4
Prev: #43
|
1.3 |
—
|
no change | no change |
P
S
|
17,687,772 | $63,322,224 | 2018 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TSHA
TAYSHA GENE THE...
|
Healthcare | 0.61% | 0.90% |
#40
10
Prev: #30
|
0.7 |
—
|
-2,718,049 | -16.6% |
P
S
|
13,680,248 | $61,150,709 | 2023 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ALKS
ALKERMES PLC
|
Healthcare | 0.59% | 0.47% |
#41
8
Prev: #49
|
1.2 |
—
|
no change | no change |
P
S
|
1,672,356 | $59,134,508 | 2023 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
CMPS
COMPASS PATHWAY...
|
Healthcare | 0.59% | 0.61% |
#42
2
Prev: #44
|
2.7 |
—
|
1,875,000 | 21.4% |
P
S
|
10,632,390 | $58,797,117 | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
KOD
KODIAK SCIENCES...
|
Healthcare | 0.56% | 0.42% |
#43
8
Prev: #51
|
0.7 |
—
|
1 | 0.0% |
P
S
|
1,487,934 | $56,720,044 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
REPL
REPLIMUNE GROUP...
|
Healthcare | 0.56% | 0.70% |
#44
5
Prev: #39
|
0.7 |
—
|
216,564 | 3.0% |
P
S
|
7,356,916 | $56,280,407 | 2024 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
CRNX
CRINETICS PHARM...
|
Healthcare | 0.52% | 0.63% |
#45
4
Prev: #41
|
2.2 |
—
|
100,000 | 7.4% |
P
S
|
1,451,326 | $52,712,160 | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
QURE
UNIQURE NV
|
Healthcare | 0.42% | 0.89% |
#46
14
Prev: #32
|
0.2 |
—
|
-1,125,106 | -30.3% |
P
S
|
2,586,356 | $42,286,921 | 2017 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
WAY
WAYSTAR HLDG CO...
|
Healthcare | 0.39% | — |
#47
Prev: #—
|
3.7 |
—
|
1,630,000 | — |
NEW
|
1,630,000 | $39,299,300 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ARWR
ARROWHEAD PHARM...
|
Healthcare | 0.37% | 0.39% |
#48
5
Prev: #53
|
0.6 |
—
|
966 | 0.2% |
P
S
|
585,682 | $36,722,261 | 2014 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
OBIO
ORCHESTRA BIOME...
|
Healthcare | 0.35% | 0.35% |
#49
6
Prev: #55
|
1.1 |
—
|
no change | no change |
P
S
|
8,306,063 | $35,300,768 | 2023 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
VSTM
VERASTEM INC
|
Healthcare | 0.35% | 0.51% |
#50
2
Prev: #48
|
1.1 |
—
|
no change | no change |
P
S
|
6,576,306 | $34,854,422 | 2025 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 |
Showing 1-50 of 99 holdings