2026 Q2 Portfolio Activity
In 2026 Q2, Rock Springs Capital Management LP maintained a portfolio of 117 distinct positions. The most significant new addition was OMEROS CORP, now representing 0.33% of the total fund value. They heavily accumulated shares in TRAVERE THERAPEUTICS INC, increasing the position by 47.4%. Conversely, Rock Springs Capital Management LP completely exited their position in ASCENDIS PHARMA A/S.
Position History
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Total Positions
117
Quarter
2026 Q2
Top Holding
RVMD (10.1%)
Top 10 Concentration
44.0%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 117
Rock Springs Capital Management LP Full Holdings List — 2026 Q2
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
RVMD
REVOLUTION MEDI...
|
Healthcare | 10.10% | 6.93% |
#1
Prev: #1
|
6.5 |
—
|
-104,255 | -8.6% |
P
S
|
1,105,210 | $206,983,729 |
$29.47
+610.0%
|
2023 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
TVTX
TRAVERE THERAPE...
|
Healthcare | 6.04% | 2.59% |
#2
8
Prev: #10
|
6.4 |
—
|
701,115 | 47.4% |
P
S
|
2,179,069 | $123,792,910 | 2020 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LLY
ELI LILLY & CO
|
Healthcare | 5.78% | 5.35% |
#3
1
Prev: #2
|
4.3 |
—
|
no change | no change |
P
S
|
98,700 | $118,383,741 | 2015 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MDGL
MADRIGAL PHARMA...
|
Healthcare | 4.59% | 5.28% |
#4
1
Prev: #3
|
2.8 |
—
|
4,000 | 2.3% |
P
S
|
174,999 | $93,965,713 | 2016 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MIRM
MIRUM PHARMACEU...
|
Healthcare | 4.56% | 4.42% |
#5
1
Prev: #4
|
2.8 |
—
|
-13,149 | -1.6% |
P
S
|
798,145 | $93,438,835 | 2019 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
RYTM
RHYTHM PHARMACE...
|
Healthcare | 3.75% | 3.54% |
#6
Prev: #6
|
2.0 |
—
|
2,850 | 0.4% |
P
S
|
692,598 | $76,899,156 | 2017 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
KYMR
KYMERA THERAPEU...
|
Healthcare | 2.54% | 2.44% |
#7
4
Prev: #11
|
1.5 |
—
|
-43,715 | -8.8% |
P
S
|
453,156 | $51,963,399 | 2020 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ARGX
ARGENX SE
|
Healthcare | 2.39% | 4.24% |
#8
3
Prev: #5
|
1.0 |
—
|
-45,750 | -46.4% |
P
S
|
52,750 | $48,939,868 | 2018 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
N/A
ASCENDIS PHARMA...
|
|
Unknown | 2.20% | — |
#9
Prev: #—
|
4.4 |
—
|
168,750 | — |
NEW
|
168,750 | $45,009,000 | — | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
XENE
XENON PHARMACEU...
|
Healthcare | 2.01% | 2.62% |
#10
1
Prev: #9
|
1.3 |
—
|
-79,113 | -10.4% |
P
S
|
683,907 | $41,280,627 | 2020 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
SRRK
SCHOLAR ROCK HL...
|
Healthcare | 1.92% | 2.14% |
#11
3
Prev: #14
|
1.3 |
—
|
-24,364 | -3.3% |
P
S
|
715,452 | $39,349,860 | 2024 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
INSM
INSMED INC
|
Healthcare | 1.88% | 3.03% |
#12
5
Prev: #7
|
2.8 |
—
|
47,850 | 15.2% |
P
S
|
362,150 | $38,612,433 | 2015 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
PEN
PENUMBRA INC
|
Healthcare | 1.78% | 2.33% |
#13
1
Prev: #12
|
1.2 |
—
|
-4,750 | -3.9% |
P
S
|
115,750 | $36,548,063 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
GPCR
STRUCTURE THERA...
|
Healthcare | 1.68% | 1.82% |
#14
4
Prev: #18
|
1.2 |
—
|
100 | 0.0% |
P
S
|
640,317 | $34,365,813 | 2023 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
RARE
ULTRAGENYX PHAR...
|
Healthcare | 1.58% | 1.50% |
#15
5
Prev: #20
|
0.6 |
—
|
-250,918 | -20.6% |
P
S
|
967,855 | $32,316,678 | 2014 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
IRTC
IRHYTHM HOLDING...
|
Healthcare | 1.57% | 1.82% |
#16
1
Prev: #17
|
1.1 |
—
|
7,900 | 3.0% |
P
S
|
269,650 | $32,074,868 | 2017 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ISRG
INTUITIVE SURGI...
|
Healthcare | 1.48% | 2.23% |
#17
4
Prev: #13
|
1.1 |
—
|
-5,540 | -6.8% |
P
S
|
76,460 | $30,406,613 | 2013 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
N/A
AGILON HEALTH I...
|
|
Unknown | 1.37% | 0.12% |
#18
71
Prev: #89
|
1.0 |
—
|
2,600 | 1.0% |
P
S
|
262,600 | $28,145,468 | — | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
UNH
UNITEDHEALTH GR...
|
Healthcare | 1.29% | 0.85% |
#19
19
Prev: #38
|
3.0 |
—
|
10,750 | 20.3% |
P
S
|
63,750 | $26,496,413 | 2013 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
CLDX
CELLDEX THERAPE...
|
Healthcare | 1.27% | 1.22% |
#20
5
Prev: #25
|
2.5 |
—
|
48,876 | 7.5% |
P
S
|
699,146 | $26,015,223 | 2022 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ERAS
ERASCA INC
|
Healthcare | 1.25% | 1.05% |
#21
10
Prev: #31
|
3.0 |
—
|
298,681 | 27.1% |
P
S
|
1,402,150 | $25,687,388 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
NBIX
NEUROCRINE BIOS...
|
Healthcare | 1.19% | 1.17% |
#22
5
Prev: #27
|
1.0 |
—
|
-5,700 | -3.8% |
P
S
|
144,750 | $24,395,441 | 2014 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ELVN
ENLIVEN THERAPE...
|
Healthcare | 1.15% | 1.91% |
#23
8
Prev: #15
|
0.5 |
—
|
-361,875 | -43.8% |
P
S
|
464,625 | $23,579,719 | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
THC
TENET HEALTHCAR...
|
Healthcare | 1.14% | 1.39% |
#24
1
Prev: #23
|
1.5 |
—
|
no change | no change |
P
S
|
125,000 | $23,385,000 | 2024 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
DXCM
DEXCOM INC
|
Healthcare | 1.13% | 1.32% |
#25
1
Prev: #24
|
1.0 |
—
|
-12,600 | -3.5% |
P
S
|
343,000 | $23,101,050 | 2021 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ACRS
ACLARIS THERAPE...
|
Healthcare | 1.12% | 0.99% |
#26
8
Prev: #34
|
0.9 |
—
|
-142,118 | -3.2% |
P
S
|
4,330,532 | $22,908,514 | 2015 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
N/A
MINIMED GROUP I...
|
|
Unknown | 1.11% | 0.93% |
#27
9
Prev: #36
|
2.9 |
—
|
465,000 | 44.1% |
P
S
|
1,520,000 | $22,724,000 | — | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
BSX
BOSTON SCIENTIF...
|
Healthcare | 1.10% | 1.91% |
#28
12
Prev: #16
|
0.9 |
—
|
13,200 | 2.6% |
P
S
|
528,500 | $22,556,380 | 2018 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
PHVS
PHARVARIS N V
|
Healthcare | 1.09% | 1.07% |
#29
1
Prev: #30
|
0.9 |
—
|
2,800 | 0.4% |
P
S
|
648,333 | $22,419,355 | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
N/A
AVALYN PHARMACE...
|
|
Unknown | 1.07% | — |
#30
Prev: #—
|
3.9 |
—
|
662,918 | — |
NEW
|
662,918 | $21,823,261 | — | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
N/A
HEMAB THERAPEUT...
|
|
Unknown | 1.03% | — |
#31
Prev: #—
|
3.9 |
—
|
575,432 | — |
NEW
|
575,432 | $21,135,617 | — | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
DYN
DYNE THERAPEUTI...
|
Healthcare | 1.02% | 1.04% |
#32
Prev: #32
|
0.9 |
—
|
-30,044 | -3.1% |
P
S
|
942,154 | $20,925,240 | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ALNY
ALNYLAM PHARMAC...
|
Healthcare | 0.98% | 1.44% |
#33
12
Prev: #21
|
0.9 |
—
|
-7,250 | -9.8% |
P
S
|
66,750 | $20,093,753 | 2017 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
COGT
COGENT BIOSCIEN...
|
Healthcare | 0.97% | 1.42% |
#34
12
Prev: #22
|
0.9 |
—
|
-108,238 | -17.3% |
P
S
|
515,917 | $19,965,988 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
AGIO
AGIOS PHARMACEU...
|
Healthcare | 0.96% | 1.59% |
#35
16
Prev: #19
|
0.4 |
—
|
-266,600 | -33.4% |
P
S
|
532,563 | $19,763,413 | 2019 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
NAMS
NEWAMSTERDAM PH...
|
Healthcare | 0.96% | 1.11% |
#36
7
Prev: #29
|
0.9 |
—
|
-6,050 | -1.0% |
P
S
|
582,744 | $19,749,194 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
VERA
VERA THERAPEUTI...
|
Healthcare | 0.90% | 1.19% |
#37
11
Prev: #26
|
0.9 |
—
|
-76,001 | -15.1% |
P
S
|
427,584 | $18,347,629 | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
TARS
TARSUS PHARMACE...
|
Healthcare | 0.85% | 0.93% |
#38
3
Prev: #35
|
2.8 |
—
|
51,908 | 23.1% |
P
S
|
277,087 | $17,439,856 | 2024 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
HTFL
HEARTFLOW INC
|
Healthcare | 0.82% | 0.82% |
#39
1
Prev: #40
|
0.8 |
—
|
1,000 | 0.2% |
P
S
|
573,500 | $16,826,490 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MBX
MBX BIOSCIENCES...
|
Healthcare | 0.80% | 0.51% |
#40
12
Prev: #52
|
0.8 |
—
|
10,251 | 3.6% |
P
S
|
298,218 | $16,461,634 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
CYTK
CYTOKINETICS IN...
|
Healthcare | 0.78% | 0.18% |
#41
37
Prev: #78
|
3.3 |
—
|
142,616 | 314.4% |
P
S
|
187,980 | $16,014,016 | 2020 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
BCAX
BICARA THERAPEU...
|
Healthcare | 0.78% | 0.57% |
#42
7
Prev: #49
|
2.3 |
—
|
46,191 | 9.4% |
P
S
|
535,286 | $15,892,641 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
N/A
PARABILIS MEDIC...
|
|
Unknown | 0.77% | — |
#43
Prev: #—
|
3.8 |
—
|
578,028 | — |
NEW
|
578,028 | $15,820,626 | — | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
ZLAB
ZAI LAB LTD
|
Healthcare | 0.76% | 0.90% |
#44
7
Prev: #37
|
1.3 |
—
|
no change | no change |
P
S
|
814,707 | $15,479,433 | 2017 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
DHR
DANAHER CORP DE...
|
Healthcare | 0.71% | 0.69% |
#45
Prev: #45
|
2.8 |
—
|
14,800 | 24.1% |
P
S
|
76,300 | $14,533,624 | 2014 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
TNGX
TANGO THERAPEUT...
|
Healthcare | 0.70% | 0.48% |
#46
7
Prev: #53
|
2.3 |
—
|
69,636 | 18.0% |
P
S
|
456,551 | $14,271,784 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
EVH
EVOLENT HEALTH ...
|
Healthcare | 0.66% | 0.36% |
#47
14
Prev: #61
|
0.8 |
—
|
-175,000 | -6.5% |
P
S
|
2,500,000 | $13,550,000 | 2021 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
PTCT
PTC THERAPEUTIC...
|
Healthcare | 0.65% | 0.65% |
#48
2
Prev: #46
|
0.8 |
—
|
500 | 0.3% |
P
S
|
162,298 | $13,238,648 | 2015 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MLYS
MINERALYS THERA...
|
Healthcare | 0.64% | 0.70% |
#49
5
Prev: #44
|
2.3 |
—
|
45,200 | 10.3% |
P
S
|
484,951 | $13,083,978 | 2023 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ZBIO
ZENAS BIOPHARMA...
|
Healthcare | 0.62% | 0.58% |
#50
2
Prev: #48
|
1.2 |
—
|
no change | no change |
P
S
|
502,077 | $12,742,714 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 |
Showing 1-50 of 117 holdings