Institutional Fund
Rock Springs Capital Management LP
Baltimore, MDCIK 15957255 filings on record
Portfolio Value
$1.70B
Q1 2026
Holdings
100
Reported positions
New Buys
11
Opened this quarter
QoQ Change
-12.7%
from $1.94B
Portfolio Value Trend
Reported 13F value by quarter
Portfolio value trend — upgrade to see history
UpgradeTop Allocations
Largest positions by weight
- Revolution Medicines Inc6.9%
- Eli Lilly & Co5.4%
- Madrigal Pharmaceuticals Inc5.3%
- Mirum Pharmaceuticals Inc4.4%
- Argenx Se4.2%
- Rhythm Pharmaceuticals Inc3.5%
- Other70.2%
Portfolio Holdings
100 positions · Q1 2026
| # | Security | Shares | Value | % Port. | Δ Shares | Activity |
|---|---|---|---|---|---|---|
| 1 | Revolution Medicines Inc | 1.21M | $117.62M | 6.9% | −125.8K | Reduced |
| 2 | Eli Lilly & Co | 98.7K | $90.78M | 5.4% | −6.7K | Reduced |
| 3 | Madrigal Pharmaceuticals Inc | 171.0K | $89.51M | 5.3% | +31.4K | Added |
| 4 | Mirum Pharmaceuticals Inc | 811.3K | $74.95M | 4.4% | +49.0K | Added |
| 5 | Argenx Se | 98.5K | $71.93M | 4.2% | −4.8K | Reduced |
| 6 | Rhythm Pharmaceuticals Inc | 689.7K | $59.99M | 3.5% | −5.3K | Reduced |
| 7 | Insmed Inc | 314.3K | $51.39M | 3.0% | −5.0K | Reduced |
| 8 | Ascendis Pharma A/S | 194.0K | $44.37M | 2.6% | −9.5K | Reduced |
| 9 | Xenon Pharmaceuticals Inc | 763.0K | $44.37M | 2.6% | −24.8K | Reduced |
| 10 | Travere Therapeutics Inc | 1.48M | $43.91M | 2.6% | −732.4K | Reduced |
90 more holdings on Premium
See this fund's complete portfolio, full position changes, and activity history.
Unlock full portfolio