Filed: 8/14/2026ACC: 0001172661-26-003527
📋 What this filing means
ROCK SPRINGS CAPITAL MANAGEMENT LP filed this quarterly 13F‑HR report disclosing 104 equity positions with a total reported market value of $2.05B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
104
Positions
$2.05B
Total AUM (reported)
55.94M
Total Shares
Allocation by class
COM$1.58B77.3%
COM NEW$142.06M6.9%
SPONSORED ADR$56.12M2.7%
COM SHS$49.69M2.4%
ORD SHS$45.01M2.2%
COM PAR $.01$38.61M1.9%
SPONSORED ADS$37.33M1.8%
Portfolio Concentration
Top 3$449.16M21.9%
4–10$451.50M22.0%
11–25$444.48M21.7%
Rest$703.67M34.3%
Top 3 weight
21.9%
Top 10 weight
44.0%
Voting Authority Distribution
Total shares with voting rights: 55.94M
Sole
Full voting authority
55.94M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole104
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings104
Rows:
REVOLUTION MEDICINES INC
SOLEShares1.11M
TypeSH
Market value$206.98M
10.10%
Sole
1.11M
Shared
0.00
None
0.00
TRAVERE THERAPEUTICS INC
SOLEShares2.18M
TypeSH
Market value$123.79M
6.04%
Sole
2.18M
Shared
0.00
None
0.00
ELI LILLY & CO
SOLEShares98.70K
TypeSH
Market value$118.38M
5.78%
Sole
98.70K
Shared
0.00
None
0.00
MADRIGAL PHARMACEUTICALS INC
SOLEShares175K
TypeSH
Market value$93.97M
4.59%
Sole
175K
Shared
0.00
None
0.00
MIRUM PHARMACEUTICALS INC
SOLEShares798.14K
TypeSH
Market value$93.44M
4.56%
Sole
798.14K
Shared
0.00
None
0.00
RHYTHM PHARMACEUTICALS INC
SOLEShares692.60K
TypeSH
Market value$76.90M
3.75%
Sole
692.60K
Shared
0.00
None
0.00
KYMERA THERAPEUTICS INC
SOLEShares453.16K
TypeSH
Market value$51.96M
2.54%
Sole
453.16K
Shared
0.00
None
0.00
ARGENX SE
SOLEShares52.75K
TypeSH
Market value$48.94M
2.39%
Sole
52.75K
Shared
0.00
None
0.00
ASCENDIS PHARMA A/S
SOLEShares168.75K
TypeSH
Market value$45.01M
2.20%
Sole
168.75K
Shared
0.00
None
0.00
XENON PHARMACEUTICALS INC
SOLEShares683.91K
TypeSH
Market value$41.28M
2.01%
Sole
683.91K
Shared
0.00
None
0.00
SCHOLAR ROCK HLDG CORP
SOLEShares715.45K
TypeSH
Market value$39.35M
1.92%
Sole
715.45K
Shared
0.00
None
0.00
INSMED INC
SOLEShares362.15K
TypeSH
Market value$38.61M
1.88%
Sole
362.15K
Shared
0.00
None
0.00
PENUMBRA INC
SOLEShares115.75K
TypeSH
Market value$36.55M
1.78%
Sole
115.75K
Shared
0.00
None
0.00
STRUCTURE THERAPEUTICS INC
SOLEShares640.32K
TypeSH
Market value$34.37M
1.68%
Sole
640.32K
Shared
0.00
None
0.00
ULTRAGENYX PHARMACEUTICAL IN
SOLEShares967.86K
TypeSH
Market value$32.32M
1.58%
Sole
967.86K
Shared
0.00
None
0.00
IRHYTHM HOLDINGS INC
SOLEShares269.65K
TypeSH
Market value$32.07M
1.57%
Sole
269.65K
Shared
0.00
None
0.00
INTUITIVE SURGICAL INC
SOLEShares76.46K
TypeSH
Market value$30.41M
1.48%
Sole
76.46K
Shared
0.00
None
0.00
AGILON HEALTH INC
SOLEShares262.60K
TypeSH
Market value$28.15M
1.37%
Sole
262.60K
Shared
0.00
None
0.00
UNITEDHEALTH GROUP INC
SOLEShares63.75K
TypeSH
Market value$26.50M
1.29%
Sole
63.75K
Shared
0.00
None
0.00
CELLDEX THERAPEUTICS INC NEW
SOLEShares699.15K
TypeSH
Market value$26.02M
1.27%
Sole
699.15K
Shared
0.00
None
0.00
ERASCA INC
SOLEShares1.40M
TypeSH
Market value$25.69M
1.25%
Sole
1.40M
Shared
0.00
None
0.00
NEUROCRINE BIOSCIENCES INC
SOLEShares144.75K
TypeSH
Market value$24.40M
1.19%
Sole
144.75K
Shared
0.00
None
0.00
ENLIVEN THERAPEUTICS INC
SOLEShares464.63K
TypeSH
Market value$23.58M
1.15%
Sole
464.63K
Shared
0.00
None
0.00
TENET HEALTHCARE CORP
SOLEShares125K
TypeSH
Market value$23.39M
1.14%
Sole
125K
Shared
0.00
None
0.00
DEXCOM INC
SOLEShares343K
TypeSH
Market value$23.10M
1.13%
Sole
343K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
REVOLUTION MEDICINES INCSOLE | COM | 1.11M | SH | $206.98M 10.10% | 1.11M | 0.00 | 0.00 |
TRAVERE THERAPEUTICS INCSOLE | COM | 2.18M | SH | $123.79M 6.04% | 2.18M | 0.00 | 0.00 |
ELI LILLY & COSOLE | COM | 98.70K | SH | $118.38M 5.78% | 98.70K | 0.00 | 0.00 |
MADRIGAL PHARMACEUTICALS INCSOLE | COM | 175K | SH | $93.97M 4.59% | 175K | 0.00 | 0.00 |
MIRUM PHARMACEUTICALS INCSOLE | COM | 798.14K | SH | $93.44M 4.56% | 798.14K | 0.00 | 0.00 |
RHYTHM PHARMACEUTICALS INCSOLE | COM | 692.60K | SH | $76.90M 3.75% | 692.60K | 0.00 | 0.00 |
KYMERA THERAPEUTICS INCSOLE | COM | 453.16K | SH | $51.96M 2.54% | 453.16K | 0.00 | 0.00 |
ARGENX SESOLE | SPONSORED ADR | 52.75K | SH | $48.94M 2.39% | 52.75K | 0.00 | 0.00 |
ASCENDIS PHARMA A/SSOLE | ORD SHS | 168.75K | SH | $45.01M 2.20% | 168.75K | 0.00 | 0.00 |
XENON PHARMACEUTICALS INCSOLE | COM | 683.91K | SH | $41.28M 2.01% | 683.91K | 0.00 | 0.00 |
SCHOLAR ROCK HLDG CORPSOLE | COM | 715.45K | SH | $39.35M 1.92% | 715.45K | 0.00 | 0.00 |
INSMED INCSOLE | COM PAR $.01 | 362.15K | SH | $38.61M 1.88% | 362.15K | 0.00 | 0.00 |
PENUMBRA INCSOLE | COM | 115.75K | SH | $36.55M 1.78% | 115.75K | 0.00 | 0.00 |
STRUCTURE THERAPEUTICS INCSOLE | SPONSORED ADS | 640.32K | SH | $34.37M 1.68% | 640.32K | 0.00 | 0.00 |
ULTRAGENYX PHARMACEUTICAL INSOLE | COM | 967.86K | SH | $32.32M 1.58% | 967.86K | 0.00 | 0.00 |
IRHYTHM HOLDINGS INCSOLE | COM | 269.65K | SH | $32.07M 1.57% | 269.65K | 0.00 | 0.00 |
INTUITIVE SURGICAL INCSOLE | COM NEW | 76.46K | SH | $30.41M 1.48% | 76.46K | 0.00 | 0.00 |
AGILON HEALTH INCSOLE | COM NEW | 262.60K | SH | $28.15M 1.37% | 262.60K | 0.00 | 0.00 |
UNITEDHEALTH GROUP INCSOLE | COM | 63.75K | SH | $26.50M 1.29% | 63.75K | 0.00 | 0.00 |
CELLDEX THERAPEUTICS INC NEWSOLE | COM NEW | 699.15K | SH | $26.02M 1.27% | 699.15K | 0.00 | 0.00 |
ERASCA INCSOLE | COM | 1.40M | SH | $25.69M 1.25% | 1.40M | 0.00 | 0.00 |
NEUROCRINE BIOSCIENCES INCSOLE | COM | 144.75K | SH | $24.40M 1.19% | 144.75K | 0.00 | 0.00 |
ENLIVEN THERAPEUTICS INCSOLE | COM | 464.63K | SH | $23.58M 1.15% | 464.63K | 0.00 | 0.00 |
TENET HEALTHCARE CORPSOLE | COM NEW | 125K | SH | $23.39M 1.14% | 125K | 0.00 | 0.00 |
DEXCOM INCSOLE | COM | 343K | SH | $23.10M 1.13% | 343K | 0.00 | 0.00 |
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