Q1 2026 · 13F-HR
Rock Springs Capital Management LPholdings as filed
Filed 2026-05-15 · accession 0001172661-26-002225
$1.70B
Reported value
100
Positions
2026-03-31
Period end
The Brief · Rock Springs Capital Management LP · Q1 2026
AI · grounded in 13F
Rock Springs Capital Management LP exited its position in EXK, reducing exposure by $61.1M. The fund also closed its position in CDTX for $45.3M and trimmed its holding in TVTX by 33.1%. On the buy side, the fund established a new position in MMED worth $15.7M and increased its stake in ERAS by 15.9%.
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 76155X100 | RVMD | REVOLUTION MEDICINES INC | $117.6M | 6.93% | 1,209,465 | Common | SOLE |
| 532457108 | LLY | ELI LILLY & CO | $90.8M | 5.35% | 98,700 | Common | SOLE |
| 558868105 | MDGL | MADRIGAL PHARMACEUTICALS INC | $89.5M | 5.28% | 170,999 | Common | SOLE |
| 604749101 | MIRM | MIRUM PHARMACEUTICALS INC | $74.9M | 4.42% | 811,294 | Common | SOLE |
| 04016X101 | ARGX | ARGENX SE | $71.9M | 4.24% | 98,500 | Common | SOLE |
| 76243J105 | RYTM | RHYTHM PHARMACEUTICALS INC | $60.0M | 3.54% | 689,748 | Common | SOLE |
| 457669307 | INSM | INSMED INC | $51.4M | 3.03% | 314,300 | Common | SOLE |
| 04351P101 | ASNDUSD | ASCENDIS PHARMA A/S | $44.4M | 2.62% | 194,000 | Common | SOLE |
| 98420N105 | XENE | XENON PHARMACEUTICALS INC | $44.4M | 2.62% | 763,020 | Common | SOLE |
| 89422G107 | TVTX | TRAVERE THERAPEUTICS INC | $43.9M | 2.59% | 1,477,954 | Common | SOLE |
| 501575104 | KYMR | KYMERA THERAPEUTICS INC | $41.4M | 2.44% | 496,871 | Common | SOLE |
| 70975L107 | PEN | PENUMBRA INC | $39.6M | 2.33% | 120,500 | Common | SOLE |
| 46120E602 | ISRG | INTUITIVE SURGICAL INC | $37.8M | 2.23% | 82,000 | Common | SOLE |
| 80706P103 | SRRK | SCHOLAR ROCK HLDG CORP | $36.4M | 2.14% | 739,816 | Common | SOLE |
| 29337E102 | ELVN | ENLIVEN THERAPEUTICS INC | $32.4M | 1.91% | 826,500 | Common | SOLE |
| 101137107 | BSX | BOSTON SCIENTIFIC CORP | $32.3M | 1.91% | 515,300 | Common | SOLE |
| 450056106 | IRTC | IRHYTHM HOLDINGS INC | $30.9M | 1.82% | 261,750 | Common | SOLE |
| 86366E106 | GPCR | STRUCTURE THERAPEUTICS INC | $30.9M | 1.82% | 640,217 | Common | SOLE |
| 00847X104 | AGIO | AGIOS PHARMACEUTICALS INC | $27.0M | 1.59% | 799,163 | Common | SOLE |
| 90400D108 | RARE | ULTRAGENYX PHARMACEUTICAL IN | $25.5M | 1.50% | 1,218,773 | Common | SOLE |
| 02043Q107 | ALNY | ALNYLAM PHARMACEUTICALS INC | $24.5M | 1.44% | 74,000 | Common | SOLE |
| 19240Q201 | COGT | COGENT BIOSCIENCES INC | $24.0M | 1.42% | 624,155 | Common | SOLE |
| 88033G407 | THC | TENET HEALTHCARE CORP | $23.6M | 1.39% | 125,000 | Common | SOLE |
| 252131107 | DXCM | DEXCOM INC | $22.3M | 1.32% | 355,600 | Common | SOLE |
| 15117B202 | CLDX | CELLDEX THERAPEUTICS INC NEW | $20.6M | 1.22% | 650,270 | Common | SOLE |
| 92337R101 | VERA | VERA THERAPEUTICS INC | $20.3M | 1.19% | 503,585 | Common | SOLE |
| 64125C109 | NBIX | NEUROCRINE BIOSCIENCES INC | $19.8M | 1.17% | 150,450 | Common | SOLE |
| 03940C100 | ACLXGBX | ARCELLX INC | $19.5M | 1.15% | 169,859 | Common | SOLE |
| N62509109 | NAMS | NEWAMSTERDAM PHARMA COMPANY | $18.8M | 1.11% | 588,794 | Common | SOLE |
| N69605108 | PHVS | PHARVARIS N V | $18.2M | 1.07% | 645,533 | Common | SOLE |
| 29479A108 | ERAS | ERASCA INC | $17.9M | 1.05% | 1,103,469 | Common | SOLE |
| 26818M108 | DYN | DYNE THERAPEUTICS INC | $17.6M | 1.04% | 972,198 | Common | SOLE |
| 20454B104 | CMPX | COMPASS THERAPEUTICS INC | $17.5M | 1.03% | 3,305,308 | Common | SOLE |
| 00461U105 | ACRS | ACLARIS THERAPEUTICS INC | $16.8M | 0.99% | 4,472,650 | Common | SOLE |
| 87650L103 | TARS | TARSUS PHARMACEUTICALS INC | $15.8M | 0.93% | 225,179 | Common | SOLE |
| 60365F109 | MMED | MINIMED GROUP INC | $15.7M | 0.93% | 1,055,000 | Common | SOLE |
| 98887Q104 | ZLAB | ZAI LAB LTD | $15.3M | 0.90% | 814,707 | Common | SOLE |
| 91324P102 | UNH | UNITEDHEALTH GROUP INC | $14.3M | 0.85% | 53,000 | Common | SOLE |
| 152309100 | CNTA | CENTESSA PHARMACEUTICALS PLC | $14.0M | 0.82% | 351,828 | Common | SOLE |
| 42238D107 | HTFL | HEARTFLOW INC | $13.9M | 0.82% | 572,500 | Common | SOLE |
| 039697107 | ARDX | ARDELYX INC | $13.8M | 0.81% | 2,299,473 | Common | SOLE |
| 86627T108 | SMMT | SUMMIT THERAPEUTICS INC | $13.5M | 0.79% | 710,000 | Common | SOLE |
| 114340102 | AZTA | AZENTA INC | $12.0M | 0.71% | 569,100 | Common | SOLE |
| 603170101 | MLYS | MINERALYS THERAPEUTICS INC | $11.9M | 0.70% | 439,751 | Common | SOLE |
| 235851102 | DHR | DANAHER CORP DEL | $11.7M | 0.69% | 61,500 | Common | SOLE |
| 69366J200 | PTCT | PTC THERAPEUTICS INC | $11.0M | 0.65% | 161,798 | Common | SOLE |
| 142152107 | CAI | CARIS LIFE SCIENCES INC | $10.1M | 0.59% | 563,000 | Common | SOLE |
| 98937L105 | ZBIO | ZENAS BIOPHARMA INC | $9.8M | 0.58% | 502,077 | Common | SOLE |
| 055477103 | BCAX | BICARA THERAPEUTICS INC | $9.7M | 0.57% | 489,095 | Common | SOLE |
| 10806X102 | BBIO | BRIDGEBIO PHARMA INC | $9.5M | 0.56% | 128,250 | Common | SOLE |
| 834203309 | SLNO | SOLENO THERAPEUTICS INC | $8.6M | 0.51% | 257,253 | Common | SOLE |
| 55287L101 | MBX | MBX BIOSCIENCES INC | $8.6M | 0.51% | 287,967 | Common | SOLE |
| 87583X109 | TNGX | TANGO THERAPEUTICS INC | $8.1M | 0.48% | 386,915 | Common | SOLE |
| 75886F107 | REGN | REGENERON PHARMACEUTICALS | $7.8M | 0.46% | 10,100 | Common | SOLE |
| 45257U108 | IMNM | IMMUNOME INC | $7.6M | 0.45% | 347,666 | Common | SOLE |
| 03237H101 | AMLX | AMYLYX PHARMACEUTICALS INC | $6.9M | 0.41% | 499,764 | Common | SOLE |
| 68170A108 | OMDA | OMADA HEALTH INC | $6.8M | 0.40% | 541,000 | Common | SOLE |
| 457730109 | INSP | INSPIRE MED SYS INC | $6.8M | 0.40% | 131,800 | Common | SOLE |
| 03753U106 | APLSUSD | APELLIS PHARMACEUTICALS INC | $6.5M | 0.39% | 162,750 | Common | SOLE |
| G01767105 | ALKS | ALKERMES PLC | $6.5M | 0.38% | 183,986 | Common | SOLE |
| 30050B101 | EVH | EVOLENT HEALTH INC | $6.1M | 0.36% | 2,675,000 | Common | SOLE |
| 45579U109 | INDV | INDIVIOR PHARMACEUTICALS INC | $6.1M | 0.36% | 200,000 | Common | SOLE |
| 880881107 | 430 | TERNS PHARMACEUTICALS INC | $6.0M | 0.35% | 113,748 | Common | SOLE |
| 268311107 | EDAP | EDAP TMS S A | $5.1M | 0.30% | 1,378,000 | Common | SOLE |
| 47103J105 | JANX | JANUX THERAPEUTICS INC | $5.1M | 0.30% | 367,009 | Common | SOLE |
| 71944F106 | PHR | PHREESIA INC | $5.0M | 0.30% | 600,400 | Common | SOLE |
| 883556102 | TMO | THERMO FISHER SCIENTIFIC INC | $4.9M | 0.29% | 10,000 | Common | SOLE |
| 863667101 | SYK | STRYKER CORPORATION | $4.9M | 0.29% | 14,800 | Common | SOLE |
| 829401108 | SION | SIONNA THERAPEUTICS INC | $4.0M | 0.23% | 99,429 | Common | SOLE |
| 03969F109 | RCUS | ARCUS BIOSCIENCES INC | $3.9M | 0.23% | 180,000 | Common | SOLE |
| 78464A870 | XBI | SPDR SERIES TRUST | $3.8M | 0.23% | 30,000 | Common | SOLE |
| 02081G201 | ATEC | ALPHATEC HLDGS INC | $3.8M | 0.22% | 350,000 | Common | SOLE |
| 92243G108 | PCVX | VAXCYTE INC | $3.5M | 0.21% | 60,250 | Common | SOLE |
| 30233G209 | EYPT | EYEPOINT INC | $3.3M | 0.20% | 258,739 | Common | SOLE |
| 670100205 | NVO | NOVO-NORDISK A S | $3.3M | 0.19% | 90,000 | Common | SOLE |
| 67576A100 | OCUL | OCULAR THERAPEUTIX INC | $3.3M | 0.19% | 383,716 | Common | SOLE |
| 92686J106 | VKTX | VIKING THERAPEUTICS INC | $3.1M | 0.18% | 96,000 | Common | SOLE |
| 23282W605 | CYTK | CYTOKINETICS INC | $3.0M | 0.18% | 45,364 | Common | SOLE |
| 15673T100 | IPSC | CENTURY THERAPEUTICS INC | $2.9M | 0.17% | 1,304,347 | Common | SOLE |
| 126650100 | CVS | CVS HEALTH CORP | $2.9M | 0.17% | 40,000 | Common | SOLE |
| G76279101 | ROIV | ROIVANT SCIENCES LTD | $2.7M | 0.16% | 97,000 | Common | SOLE |
| 00444T209 | TLPH | TALPHERA INC | $2.7M | 0.16% | 3,589,186 | Common | SOLE |
| 68062P106 | OLMA | OLEMA PHARMACEUTICALS INC | $2.5M | 0.15% | 170,378 | Common | SOLE |
| 86881A100 | SGRY | SURGERY PARTNERS INC | $2.5M | 0.15% | 208,000 | Common | SOLE |
| 52635N103 | LENZ | LENZ THERAPEUTICS INC | $2.4M | 0.14% | 257,460 | Common | SOLE |
| 28176E108 | EW | EDWARDS LIFESCIENCES CORP | $2.3M | 0.14% | 28,900 | Common | SOLE |
| 252828108 | DNTH | DIANTHUS THERAPEUTICS INC | $2.2M | 0.13% | 26,757 | Common | SOLE |
| 64135M105 | NGNE | NEUROGENE INC | $2.1M | 0.12% | 104,339 | Common | SOLE |
| 00857U206 | AGL | AGILON HEALTH INC | $2.1M | 0.12% | 260,000 | Common | SOLE |
| 218352102 | CORT | CORCEPT THERAPEUTICS INC | $2.0M | 0.12% | 50,250 | Common | SOLE |
| 00404A109 | ACHC | ACADIA HEALTHCARE COMPANY IN | $1.8M | 0.10% | 75,500 | Common | SOLE |
| 881624209 | TEVA | TEVA PHARMACEUTICAL INDS LTD | $1.4M | 0.08% | 45,500 | Common | SOLE |
| 61559X104 | MLTX | MOONLAKE IMMUNOTHERAPEUTICS | $1.2M | 0.07% | 61,700 | Common | SOLE |
| G50871105 | JAZZ | JAZZ PHARMACEUTICALS PLC | $1.1M | 0.06% | 5,750 | Common | SOLE |
| 471871202 | JSPR | JASPER THERAPEUTICS INC | $964,456 | 0.06% | 1,100,726 | Common | SOLE |
| 52490G102 | LEGN | LEGEND BIOTECH CORP | $732,645 | 0.04% | 40,500 | Common | SOLE |
| 38341P102 | GOSS | GOSSAMER BIO INC | $528,718 | 0.03% | 1,609,492 | Common | SOLE |
| 03152W109 | AM6 | AMICUS THERAPEUTIC | $304,557 | 0.02% | 21,062 | Common | SOLE |
| 687604108 | ORKA | ORUKA THERAPEUTICS INC | $202,233 | 0.01% | 4,123 | Common | SOLE |
| 09058V103 | BCRX | BIOCRYST PHARMACEUTICALS INC | $119,952 | 0.01% | 12,600 | Common | SOLE |
Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.