13FBOX
Rock Springs Capital Management LP · 13F Holdings
Options Calculator Rankings

Rock Springs Capital Management LP

No.1723 Data as of 2026Q2
Latest AUM (Q2 2026)
$2.05B
QoQ Change Q1 2026
+$352.2M+20.8%
Holdings
104
New Buys
16
Adds
40
Reduces
31
Exits
12
Unchanged
17
Holdings Value Trend
Holdings by Sector
Stock Ownership TrendPortfolio %Prev Q %Q2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
RREVOLUTION MEDICINES INC COMRVMD
10.1%6.93%$207.0M1.1M$117.6M1.2M-104,255-8.62%Reduce
TTRAVERE THERAPEUTICS INCTVTX
6.04%2.59%$123.8M2.2M$43.9M1.5M+701,115+47.44%Add
ELI LILLY & COLLY
5.78%5.35%$118.4M98,700$90.8M98,70000.00%Unchanged
MADRIGAL PHARMACEUTICALS INCMDGL
4.59%5.28%$94.0M174,999$89.5M170,999+4,000+2.34%Add
MMIRUM PHARMACEUTICALS INCMIRM
4.56%4.42%$93.4M798,145$74.9M811,294-13,149-1.62%Reduce
RHYTHM PHARMACEUTICALS INCRYTM
3.75%3.54%$76.9M692,598$60.0M689,748+2,850+0.41%Add
KYMERA THERAPEUTICS INCKYMR
2.54%2.44%$52.0M453,156$41.4M496,871-43,715-8.80%Reduce
ARGENX SE SPONSORED ADRARGX
2.39%4.24%$48.9M52,750$71.9M98,500-45,750-46.45%Reduce
AASCENDIS PHARMA A/S SPONSORED ADRASND
2.2%2.62%$45.0M168,750$44.4M194,000-25,250-13.02%Reduce
XENON PHARMACEUTICALS INCXENE
2.01%2.62%$41.3M683,907$44.4M763,020-79,113-10.37%Reduce
SCHOLAR ROCK HLDG CORPSRRK
1.92%2.14%$39.3M715,452$36.4M739,816-24,364-3.29%Reduce
INSMED INCINSM
1.88%3.03%$38.6M362,150$51.4M314,300+47,850+15.22%Add
PENUMBRA INCPEN
1.78%2.33%$36.5M115,750$39.6M120,500-4,750-3.94%Reduce
STRUCTURE THERAPEUTICS INCGPCR
1.68%1.82%$34.4M640,317$30.9M640,217+100+0.02%Add
UULTRAGENYX PHARMACEUTICAL INRARE
1.58%1.5%$32.3M967,855$25.5M1.2M-250,918-20.59%Reduce
IRHYTHM HOLDINGS INCIRTC
1.57%1.82%$32.1M269,650$30.9M261,750+7,900+3.02%Add
INTUITIVE SURGICAL INCISRG
1.48%2.23%$30.4M76,460$37.8M82,000-5,540-6.76%Reduce
AAGILON HEALTH INCAGL
1.37%0.12%$28.1M262,600$2.1M260,000+2,600+1.00%Add
UNITEDHEALTH GROUP INCUNH
1.29%0.85%$26.5M63,750$14.3M53,000+10,750+20.28%Add
CCELLDEX THERAPEUTICS INC NEWCLDX
1.27%1.22%$26.0M699,146$20.6M650,270+48,876+7.52%Add
EERASCA INCERAS
1.25%1.05%$25.7M1.4M$17.9M1.1M+298,681+27.07%Add
NEUROCRINE BIOSCIENCES INCNBIX
1.19%1.17%$24.4M144,750$19.8M150,450-5,700-3.79%Reduce
EENLIVEN THERAPEUTICS INCELVN
1.15%1.91%$23.6M464,625$32.4M826,500-361,875-43.78%Reduce
TTENET HEALTHCARE CORPTHC
1.14%1.39%$23.4M125,000$23.6M125,00000.00%Unchanged
DEXCOM INCDXCM
1.13%1.32%$23.1M343,000$22.3M355,600-12,600-3.54%Reduce
AACLARIS THERAPEUTICS INC COMACRS
1.12%0.99%$22.9M4.3M$16.8M4.5M-142,118-3.18%Reduce
MMINIMED GROUP INC COMMMED
1.11%0.93%$22.7M1.5M$15.7M1.1M+465,000+44.08%Add
BOSTON SCIENTIFIC CORP COMBSX
1.1%1.91%$22.6M528,500$32.3M515,300+13,200+2.56%Add
PHARVARIS N VPHVS
1.09%1.07%$22.4M648,333$18.2M645,533+2,800+0.43%Add
AAVALYN PHARMACEUTICALS INCAVLN
1.07%$21.8M662,918$00+662,918New Buy
HHEMAB THERAPEUTICS HLDGS INCCOAG
1.03%$21.1M575,432$00+575,432New Buy
DDYNE THERAPEUTICS INCDYN
1.02%1.04%$20.9M942,154$17.6M972,198-30,044-3.09%Reduce
ALNYLAM PHARMACEUTICALS INCALNY
0.98%1.44%$20.1M66,750$24.5M74,000-7,250-9.80%Reduce
COGENT BIOSCIENCES INCCOGT
0.97%1.42%$20.0M515,917$24.0M624,155-108,238-17.34%Reduce
AGIOS PHARMACEUTICALS INCAGIO
0.96%1.59%$19.8M532,563$27.0M799,163-266,600-33.36%Reduce
NNEWAMSTERDAM PHARMA COMPANYNAMS
0.96%1.11%$19.7M582,744$18.8M588,794-6,050-1.03%Reduce
VVERA THERAPEUTICS INCVERA
0.9%1.19%$18.3M427,584$20.3M503,585-76,001-15.09%Reduce
TTARSUS PHARMACEUTICALS INCTARS
0.85%0.93%$17.4M277,087$15.8M225,179+51,908+23.05%Add
HHEARTFLOW INCHTFL
0.82%0.82%$16.8M573,500$13.9M572,500+1,000+0.17%Add
MMBX BIOSCIENCES INCMBX
0.8%0.51%$16.5M298,218$8.6M287,967+10,251+3.56%Add
CYTOKINETICS INCCYTK
0.78%0.18%$16.0M187,980$3.0M45,364+142,616+314.38%Add
BBICARA THERAPEUTICS INCBCAX
0.78%0.57%$15.9M535,286$9.7M489,095+46,191+9.44%Add
PPARABILIS MEDICINES INCPBLS
0.77%$15.8M578,028$00+578,028New Buy
ZZAI LAB LIMITED ADS EACH REP 10 ORD SHSZLAB
0.76%0.9%$15.5M814,707$15.3M814,70700.00%Unchanged
DANAHER CORP DEL COMDHR
0.71%0.69%$14.5M76,300$11.7M61,500+14,800+24.07%Add
TTANGO THERAPEUTICS INCTNGX
0.7%0.48%$14.3M456,551$8.1M386,915+69,636+18.00%Add
EEVOLENT HEALTH INCEVH
0.66%0.36%$13.6M2.5M$6.1M2.7M-175,000-6.54%Reduce
PTC THERAPEUTICS INCPTCT
0.65%0.65%$13.2M162,298$11.0M161,798+500+0.31%Add
MINERALYS THERAPEUTICS INCMLYS
0.64%0.7%$13.1M484,951$11.9M439,751+45,200+10.28%Add
ZZENAS BIOPHARMA INCZBIO
0.62%0.58%$12.7M502,077$9.8M502,07700.00%Unchanged

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow