☆Rock Springs Capital Management LP
Quality Q
0.441
AUM ($M)
2,049
Positions
104
Turnover
0.20
Top-10 wt
44%
Herfindahl
0.031
History (qtrs)
6
Excess Return
—
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Holdings · 117 positions · portfolio value $2,049M
| Ticker | Name | Activity | Security Type | Weight | Δ Weight | Value ($M) | Shares | Δ Shares | Qtrs Held | Excess Return |
|---|---|---|---|---|---|---|---|---|---|---|
| ☆RVMD funds › | REVOLUTION MEDICINES INC | TRIM | — | 10.1% | +3.2% | 207.0 | 1,105,210 | -104,255 | 5 | — |
| ☆TVTX funds › | TRAVERE THERAPEUTICS INC | ADD | — | 6.0% | +3.5% | 123.8 | 2,179,069 | +701,115 | 5 | — |
| ☆LLY funds › | ELI LILLY & CO | HOLD | — | 5.8% | +0.4% | 118.4 | 98,700 | +0 | 5 | — |
| ☆MDGL funds › | MADRIGAL PHARMACEUTICALS INC | ADD | — | 4.6% | -0.7% | 94.0 | 174,999 | +4,000 | 5 | — |
| ☆MIRM funds › | MIRUM PHARMACEUTICALS INC | TRIM | — | 4.6% | +0.1% | 93.4 | 798,145 | -13,149 | 5 | — |
| ☆RYTM funds › | RHYTHM PHARMACEUTICALS INC | ADD | — | 3.8% | +0.2% | 76.9 | 692,598 | +2,850 | 5 | — |
| ☆KYMR funds › | KYMERA THERAPEUTICS INC | TRIM | — | 2.5% | +0.1% | 52.0 | 453,156 | -43,715 | 5 | — |
| ☆ARGX funds › | ARGENX SE | TRIM | — | 2.4% | -1.9% | 48.9 | 52,750 | -45,750 | 5 | — |
| ☆ASND funds › | ASCENDIS PHARMA A/S | NEW | — | 2.2% | +2.2% | 45.0 | 168,750 | +168,750 | 1 | — |
| ☆XENE funds › | XENON PHARMACEUTICALS INC | TRIM | — | 2.0% | -0.6% | 41.3 | 683,907 | -79,113 | 5 | — |
| ☆SRRK funds › | SCHOLAR ROCK HLDG CORP | TRIM | — | 1.9% | -0.2% | 39.3 | 715,452 | -24,364 | 5 | — |
| ☆INSM funds › | INSMED INC | ADD | — | 1.9% | -1.1% | 38.6 | 362,150 | +47,850 | 5 | — |
| ☆PEN funds › | PENUMBRA INC | TRIM | — | 1.8% | -0.5% | 36.5 | 115,750 | -4,750 | 5 | — |
| ☆GPCR funds › | STRUCTURE THERAPEUTICS INC | ADD | — | 1.7% | -0.1% | 34.4 | 640,317 | +100 | 5 | — |
| ☆RARE funds › | ULTRAGENYX PHARMACEUTICAL IN | TRIM | — | 1.6% | +0.1% | 32.3 | 967,855 | -250,918 | 5 | — |
| ☆IRTC funds › | IRHYTHM HOLDINGS INC | ADD | — | 1.6% | -0.3% | 32.1 | 269,650 | +7,900 | 5 | — |
| ☆ISRG funds › | INTUITIVE SURGICAL INC | TRIM | — | 1.5% | -0.7% | 30.4 | 76,460 | -5,540 | 5 | — |
| ☆AGL funds › | AGILON HEALTH INC | ADD | — | 1.4% | +1.3% | 28.1 | 262,600 | +2,600 | 2 | — |
| ☆UNH funds › | UNITEDHEALTH GROUP INC | ADD | — | 1.3% | +0.4% | 26.5 | 63,750 | +10,750 | 3 | — |
| ☆CLDX funds › | CELLDEX THERAPEUTICS INC NEW | ADD | — | 1.3% | +0.1% | 26.0 | 699,146 | +48,876 | 5 | — |
| ☆ERAS funds › | ERASCA INC | ADD | — | 1.3% | +0.2% | 25.7 | 1,402,150 | +298,681 | 3 | — |
| ☆NBIX funds › | NEUROCRINE BIOSCIENCES INC | TRIM | — | 1.2% | +0.0% | 24.4 | 144,750 | -5,700 | 5 | — |
| ☆ELVN funds › | ENLIVEN THERAPEUTICS INC | TRIM | — | 1.2% | -0.8% | 23.6 | 464,625 | -361,875 | 5 | — |
| ☆THC funds › | TENET HEALTHCARE CORP | HOLD | — | 1.1% | -0.2% | 23.4 | 125,000 | +0 | 5 | — |
| ☆DXCM funds › | DEXCOM INC | TRIM | — | 1.1% | -0.2% | 23.1 | 343,000 | -12,600 | 5 | — |
| ☆ACRS funds › | ACLARIS THERAPEUTICS INC | TRIM | — | 1.1% | +0.1% | 22.9 | 4,330,532 | -142,118 | 5 | — |
| ☆MMED funds › | MINIMED GROUP INC | ADD | — | 1.1% | +0.2% | 22.7 | 1,520,000 | +465,000 | 2 | — |
| ☆BSX funds › | BOSTON SCIENTIFIC CORP | ADD | — | 1.1% | -0.8% | 22.6 | 528,500 | +13,200 | 5 | — |
| ☆PHVS funds › | PHARVARIS N V | ADD | — | 1.1% | +0.0% | 22.4 | 648,333 | +2,800 | 5 | — |
| ☆AVLN funds › | AVALYN PHARMACEUTICALS INC | NEW | — | 1.1% | +1.1% | 21.8 | 662,918 | +662,918 | 1 | — |
| ☆COAG funds › | HEMAB THERAPEUTICS HLDGS INC | NEW | — | 1.0% | +1.0% | 21.1 | 575,432 | +575,432 | 1 | — |
| ☆DYN funds › | DYNE THERAPEUTICS INC | TRIM | — | 1.0% | -0.0% | 20.9 | 942,154 | -30,044 | 5 | — |
| ☆ALNY funds › | ALNYLAM PHARMACEUTICALS INC | TRIM | — | 1.0% | -0.5% | 20.1 | 66,750 | -7,250 | 5 | — |
| ☆COGT funds › | COGENT BIOSCIENCES INC | TRIM | — | 1.0% | -0.4% | 20.0 | 515,917 | -108,238 | 5 | — |
| ☆AGIO funds › | AGIOS PHARMACEUTICALS INC | TRIM | — | 1.0% | -0.6% | 19.8 | 532,563 | -266,600 | 5 | — |
| ☆NAMS funds › | NEWAMSTERDAM PHARMA COMPANY | TRIM | — | 1.0% | -0.1% | 19.7 | 582,744 | -6,050 | 5 | — |
| ☆VERA funds › | VERA THERAPEUTICS INC | TRIM | — | 0.9% | -0.3% | 18.3 | 427,584 | -76,001 | 5 | — |
| ☆TARS funds › | TARSUS PHARMACEUTICALS INC | ADD | — | 0.9% | -0.1% | 17.4 | 277,087 | +51,908 | 5 | — |
| ☆HTFL funds › | HEARTFLOW INC | ADD | — | 0.8% | +0.0% | 16.8 | 573,500 | +1,000 | 4 | — |
| ☆MBX funds › | MBX BIOSCIENCES INC | ADD | — | 0.8% | +0.3% | 16.5 | 298,218 | +10,251 | 4 | — |
| ☆CYTK funds › | CYTOKINETICS INC | ADD | — | 0.8% | +0.6% | 16.0 | 187,980 | +142,616 | 3 | — |
| ☆BCAX funds › | BICARA THERAPEUTICS INC | ADD | — | 0.8% | +0.2% | 15.9 | 535,286 | +46,191 | 5 | — |
| ☆PBLS funds › | PARABILIS MEDICINES INC | NEW | — | 0.8% | +0.8% | 15.8 | 578,028 | +578,028 | 1 | — |
| ☆ZLAB funds › | ZAI LAB LTD | HOLD | — | 0.8% | -0.1% | 15.5 | 814,707 | +0 | 5 | — |
| ☆DHR funds › | DANAHER CORP DEL | ADD | — | 0.7% | +0.0% | 14.5 | 76,300 | +14,800 | 5 | — |
| ☆TNGX funds › | TANGO THERAPEUTICS INC | ADD | — | 0.7% | +0.2% | 14.3 | 456,551 | +69,636 | 3 | — |
| ☆EVH funds › | EVOLENT HEALTH INC | TRIM | — | 0.7% | +0.3% | 13.6 | 2,500,000 | -175,000 | 5 | — |
| ☆PTCT funds › | PTC THERAPEUTICS INC | ADD | — | 0.6% | -0.0% | 13.2 | 162,298 | +500 | 3 | — |
| ☆MLYS funds › | MINERALYS THERAPEUTICS INC | ADD | — | 0.6% | -0.1% | 13.1 | 484,951 | +45,200 | 5 | — |
| ☆ZBIO funds › | ZENAS BIOPHARMA INC | HOLD | — | 0.6% | +0.0% | 12.7 | 502,077 | +0 | 5 | — |
| ☆ARDX funds › | ARDELYX INC | TRIM | — | 0.6% | -0.3% | 11.4 | 2,241,769 | -57,704 | 5 | — |
| ☆INSP funds › | INSPIRE MED SYS INC | ADD | — | 0.5% | +0.1% | 10.9 | 244,000 | +112,200 | 5 | — |
| ☆BBIO funds › | BRIDGEBIO PHARMA INC | ADD | — | 0.5% | -0.0% | 10.8 | 144,750 | +16,500 | 4 | — |
| ☆ALKS funds › | ALKERMES PLC | ADD | — | 0.5% | +0.1% | 10.5 | 199,811 | +15,825 | 4 | — |
| ☆SMMT funds › | SUMMIT THERAPEUTICS INC | ADD | — | 0.5% | -0.3% | 10.4 | 715,000 | +5,000 | 5 | — |
| ☆AZTA funds › | AZENTA INC | TRIM | — | 0.5% | -0.2% | 10.3 | 403,000 | -166,100 | 5 | — |
| ☆INDV funds › | INDIVIOR PHARMACEUTICALS INC | ADD | — | 0.5% | +0.1% | 10.1 | 245,500 | +45,500 | 2 | — |
| ☆SYK funds › | STRYKER CORPORATION | ADD | — | 0.4% | +0.2% | 9.1 | 29,000 | +14,200 | 2 | — |
| ☆AMLX funds › | AMYLYX PHARMACEUTICALS INC | HOLD | — | 0.4% | +0.0% | 9.0 | 499,764 | +0 | 5 | — |
| ☆CAI funds › | CARIS LIFE SCIENCES INC | TRIM | — | 0.4% | -0.2% | 8.7 | 487,500 | -75,500 | 5 | — |
| ☆OMDA funds › | OMADA HEALTH INC | TRIM | — | 0.4% | -0.0% | 8.2 | 373,000 | -168,000 | 5 | — |
| ☆CMPX funds › | COMPASS THERAPEUTICS INC | ADD | — | 0.4% | -0.7% | 7.7 | 3,524,929 | +219,621 | 5 | — |
| ☆IMNM funds › | IMMUNOME INC | HOLD | — | 0.4% | -0.1% | 7.4 | 347,666 | +0 | 3 | — |
| ☆FOCL funds › | EDAP TMS S A | ADD | — | 0.4% | +0.0% | 7.2 | 1,386,000 | +8,000 | 5 | — |
| ☆PHR funds › | PHREESIA INC | ADD | — | 0.4% | +0.1% | 7.2 | 696,900 | +96,500 | 5 | — |
| ☆OMER funds › | OMEROS CORP | NEW | — | 0.3% | +0.3% | 6.8 | 718,499 | +718,499 | 1 | — |
| ☆DFTX funds › | DEFINIUM THERAPEUTICS INC | NEW | — | 0.3% | +0.3% | 6.7 | 143,187 | +143,187 | 1 | — |
| ☆CORT funds › | CORCEPT THERAPEUTICS INC | ADD | — | 0.3% | +0.2% | 6.3 | 72,000 | +21,750 | 3 | — |
| ☆JANX funds › | JANUX THERAPEUTICS INC | HOLD | — | 0.3% | -0.0% | 5.6 | 367,009 | +0 | 5 | — |
| ☆MOBI funds › | MOBIA MED INC | NEW | — | 0.3% | +0.3% | 5.6 | 418,200 | +418,200 | 1 | — |
| ☆RCUS funds › | ARCUS BIOSCIENCES INC | HOLD | — | 0.3% | +0.0% | 5.5 | 180,000 | +0 | 3 | — |
| ☆TMO funds › | THERMO FISHER SCIENTIFIC INC | HOLD | — | 0.2% | -0.0% | 5.0 | 10,000 | +0 | 5 | — |
| ☆TRVI funds › | TREVI THERAPEUTICS INC | NEW | — | 0.2% | +0.2% | 4.8 | 260,000 | +260,000 | 1 | — |
| ☆SION funds › | SIONNA THERAPEUTICS INC | HOLD | — | 0.2% | -0.0% | 4.4 | 99,429 | +0 | 5 | — |
| ☆CVS funds › | CVS HEALTH CORP | HOLD | — | 0.2% | +0.0% | 4.1 | 40,000 | +0 | 2 | — |
| ☆EYPT funds › | EYEPOINT INC | ADD | — | 0.2% | -0.0% | 3.8 | 268,519 | +9,780 | 4 | — |
| ☆OCUL funds › | OCULAR THERAPEUTIX INC | HOLD | — | 0.2% | -0.0% | 3.8 | 383,716 | +0 | 4 | — |
| ☆SYRE funds › | SPYRE THERAPEUTICS INC | NEW | — | 0.2% | +0.2% | 3.8 | 42,254 | +42,254 | 1 | — |
| ☆TLPH funds › | TALPHERA INC | HOLD | — | 0.2% | +0.0% | 3.7 | 3,589,186 | +0 | 5 | — |
| ☆CUSIP:G76279101 funds › | ROIVANT SCIENCES LTD | ADD | — | 0.2% | +0.0% | 3.6 | 101,000 | +4,000 | 3 | — |
| ☆PCVX funds › | VAXCYTE INC | HOLD | — | 0.2% | -0.0% | 3.5 | 60,250 | +0 | 5 | — |
| ☆NGNE funds › | NEUROGENE INC | ADD | — | 0.2% | +0.0% | 3.4 | 106,750 | +2,411 | 5 | — |
| ☆IPSC funds › | CENTURY THERAPEUTICS INC | HOLD | — | 0.2% | -0.0% | 3.2 | 1,304,347 | +0 | 2 | — |
| ☆ATEC funds › | ALPHATEC HLDGS INC | ADD | — | 0.2% | -0.1% | 3.1 | 360,000 | +10,000 | 5 | — |
| ☆NVO funds › | NOVO-NORDISK A S | TRIM | — | 0.1% | -0.0% | 3.0 | 63,500 | -26,500 | 2 | — |
| ☆OLMA funds › | OLEMA PHARMACEUTICALS INC | ADD | — | 0.1% | -0.0% | 2.9 | 235,178 | +64,800 | 3 | — |
| ☆NGEN funds › | NERVGEN PHARMA CORP | NEW | — | 0.1% | +0.1% | 2.5 | 1,208,231 | +1,208,231 | 1 | — |
| ☆MDT funds › | MEDTRONIC PLC | NEW | — | 0.1% | +0.1% | 2.4 | 30,900 | +30,900 | 1 | — |
| ☆TEVA funds › | TEVA PHARMACEUTICAL INDS LTD | ADD | — | 0.1% | +0.0% | 2.0 | 59,000 | +13,500 | 3 | — |
| ☆DNTH funds › | DIANTHUS THERAPEUTICS INC | TRIM | — | 0.1% | -0.0% | 2.0 | 20,326 | -6,431 | 2 | — |
| ☆SGMT funds › | SAGIMET BIOSCIENCES INC | NEW | — | 0.1% | +0.1% | 1.9 | 250,000 | +250,000 | 1 | — |
| ☆CAPR funds › | CAPRICOR THERAPEUTICS INC | NEW | — | 0.1% | +0.1% | 1.8 | 74,448 | +74,448 | 1 | — |
| ☆LENZ funds › | LENZ THERAPEUTICS INC | HOLD | — | 0.1% | -0.1% | 1.5 | 257,460 | +0 | 5 | — |
| ☆ALT funds › | ALTIMMUNE INC | NEW | — | 0.1% | +0.1% | 1.4 | 471,465 | +471,465 | 1 | — |
| ☆KLRA funds › | KAILERA THERAPEUTICS INC | NEW | — | 0.1% | +0.1% | 1.4 | 65,000 | +65,000 | 1 | — |
| ☆SGRY funds › | SURGERY PARTNERS INC | TRIM | — | 0.1% | -0.1% | 1.4 | 84,000 | -124,000 | 3 | — |
| ☆AXSM funds › | AXSOME THERAPEUTICS INC. | NEW | — | 0.1% | +0.1% | 1.3 | 5,500 | +5,500 | 1 | — |
| ☆ORKA funds › | ORUKA THERAPEUTICS INC | ADD | — | 0.1% | +0.0% | 1.1 | 12,051 | +7,928 | 2 | — |
| ☆VKTX funds › | VIKING THERAPEUTICS INC | TRIM | — | 0.0% | -0.1% | 1.0 | 25,500 | -70,500 | 2 | — |
| ☆LEGN funds › | LEGEND BIOTECH CORP | TRIM | — | 0.0% | +0.0% | 1.0 | 33,500 | -7,000 | 3 | — |
| ☆GKOS funds › | GLAUKOS CORP | NEW | — | 0.0% | +0.0% | 0.7 | 4,750 | +4,750 | 1 | — |
| ☆JSPR funds › | JASPER THERAPEUTICS INC | HOLD | — | 0.0% | -0.0% | 0.5 | 1,100,726 | +0 | 5 | — |
| ☆BCRX funds › | BIOCRYST PHARMACEUTICALS INC | ADD | — | 0.0% | +0.0% | 0.2 | 22,124 | +9,524 | 2 | — |
| ☆MLTX funds › | MOONLAKE IMMUNOTHERAPEUTICS | TRIM | — | 0.0% | -0.1% | 0.2 | 10,696 | -51,004 | 4 | — |
| ☆CUSIP:03152W109 funds › | AMICUS THERAPEUTIC | EXIT | — | 0.0% | -0.0% | 0.0 | 0 | -21,062 | 0 | — |
| ☆CUSIP:03753U106 funds › | APELLIS PHARMACEUTICALS INC | EXIT | — | 0.0% | -0.4% | 0.0 | 0 | -162,750 | 0 | — |
| ☆CUSIP:03940C100 funds › | ARCELLX INC | EXIT | — | 0.0% | -1.1% | 0.0 | 0 | -169,859 | 0 | — |
| ☆CUSIP:152309100 funds › | CENTESSA PHARMACEUTICALS PLC | EXIT | — | 0.0% | -0.8% | 0.0 | 0 | -351,828 | 0 | — |
| ☆GOSS funds › | GOSSAMER BIO INC | EXIT | — | 0.0% | -0.0% | 0.0 | 0 | -1,609,492 | 0 | — |
| ☆CUSIP:834203309 funds › | SOLENO THERAPEUTICS INC | EXIT | — | 0.0% | -0.5% | 0.0 | 0 | -257,253 | 0 | — |
| ☆CUSIP:880881107 funds › | TERNS PHARMACEUTICALS INC | EXIT | — | 0.0% | -0.4% | 0.0 | 0 | -113,748 | 0 | — |
| ☆REGN funds › | REGENERON PHARMACEUTICALS | EXIT | — | 0.0% | -0.5% | 0.0 | 0 | -10,100 | 0 | — |
| ☆ACHC funds › | ACADIA HEALTHCARE COMPANY IN | EXIT | — | 0.0% | -0.1% | 0.0 | 0 | -75,500 | 0 | — |
| ☆EW funds › | EDWARDS LIFESCIENCES CORP | EXIT | — | 0.0% | -0.1% | 0.0 | 0 | -28,900 | 0 | — |
| ☆XBI funds › | SPDR SERIES TRUST | EXIT | — | 0.0% | -0.2% | 0.0 | 0 | -30,000 | 0 | — |
| ☆JAZZ funds › | JAZZ PHARMACEUTICALS PLC | EXIT | — | 0.0% | -0.1% | 0.0 | 0 | -5,750 | 0 | — |
| ☆CUSIP:04351P101 funds › | ASCENDIS PHARMA A/S | EXIT | — | 0.0% | -2.6% | 0.0 | 0 | -194,000 | 0 | — |
Point-in-time history
| Period | AUM ($M) | Positions | Turnover | Top-10 wt | Herfindahl | Quality Q | Skill | Universe |
|---|---|---|---|---|---|---|---|---|
| 2026Q2 | 2,049 | 104 | 0.20 | 44% | 0.031 | 0.438 | — | in |
| 2026Q1 | 1,697 | 100 | 0.18 | 41% | 0.026 | 0.440 | — | in |
| 2025Q4 | 1,949 | 98 | 0.18 | 40% | 0.024 | 0.399 | — | in |
| 2025Q3 | 1,711 | 92 | 0.14 | 38% | 0.023 | 0.449 | — | in |
| 2025Q2 | 1,605 | 93 | 0.18 | 36% | 0.023 | 0.372 | — | entered |
| 2025Q1 | 1,748 | 96 | 0.00 | 37% | 0.024 | 0.000 | — | out |
Long US-equity 13F disclosures only · up to 45-day reporting lag · sells = reduce/avoid, not short.
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