Rock Springs Capital Management LP

13F Filings History

Latest 13F report
Q2 2025 - Aug 14, 2025
Value $
$1.6B
Signature - Title
Nnamdi Etoh - Chief Financial Officer
Location
Baltimore, MD
Summary
This page shows a list of all the recent 13F filings made by Rock Springs Capital Management LP. Form 13F is required to be filed within 45 days of the end of a calendar quarter. Rock Springs Capital Management LP reported 93 stock holdings with total value $1.6B as of Q2 2025. Top holdings included ARGX, LLY, MRUS, RYTM, and INSM.
Holdings Value
Quarter Holdings Value $ Bought Sold Net Top Holdings Form Type Date Filed
Q2 2025 93 $1.6B +$152M -$390M -$238M ARGX, LLY, MRUS, RYTM, INSM 13F-HR 8/14/2025, 08:55 AM
Q1 2025 96 $1.75B +$68.3M -$792M -$724M ARGX, LLY, BPMC, MDGL, UNH 13F-HR 5/15/2025, 08:16 AM
Q4 2024 107 $2.63B +$185M -$461M -$276M ARGX, ISRG, LLY, NBIX, BPMC 13F-HR 2/14/2025, 08:27 AM
Q3 2024 109 $3.07B +$174M -$559M -$386M UNH, ISRG, ARGX, LLY, RARE 13F-HR 11/14/2024, 09:07 AM
Q2 2024 110 $3.31B +$231M -$618M -$387M BPMC, UNH, ISRG, NBIX, LLY 13F-HR 8/14/2024, 10:48 AM
Q1 2024 109 $3.91B +$401M -$552M -$151M BPMC, IMCR, NBIX, EVH, ISRG 13F-HR 5/15/2024, 10:09 AM
Q4 2023 103 $4.05B +$257M -$438M -$181M BPMC, IMCR, KRTX, NBIX, HUM 13F-HR 2/14/2024, 11:13 AM
Q3 2023 127 $3.73B +$268M -$302M -$34.4M HUM, IMCR, AGL, NBIX, BPMC 13F-HR 11/14/2023, 12:58 PM
Q2 2023 128 $4.2B +$145M -$297M -$153M HUM, IMCR, PODD, AGL, BPMC 13F-HR 8/14/2023, 10:21 AM
Q1 2023 120 $4.19B +$180M -$69.4M +$111M HUM, AGL, PODD, IMCR, ARGX 13F-HR 5/15/2023, 09:58 AM
Q4 2022 119 $4.16B +$244M -$69.7M +$174M HUM, IMCR, PODD, UNH, NBIX 13F-HR 2/14/2023, 10:12 AM
Q3 2022 127 $3.87B +$301M -$49.5M +$251M HUM, AGL, IMCR, UNH, ARGX 13F-HR 11/14/2022, 11:57 AM
Q2 2022 130 $3.44B +$376M -$43.3M +$333M HUM, AGL, UNH, ARGX, NBIX 13F-HR 8/15/2022, 11:24 AM
Q1 2022 134 $3.97B +$283M -$64.7M +$218M AGL, HUM, PODD, UNH, IDXX 13F-HR 5/16/2022, 10:02 AM
Q4 2021 135 $4.33B +$337M -$77.6M +$259M AGL, HUM, ALGN, ISRG, PODD 13F-HR 2/14/2022, 12:35 PM
Q3 2021 153 $4.76B +$464M -$382M +$81.9M AGL, HUM, ALGN, PODD, ISRG 13F-HR 11/15/2021, 04:40 PM
Q2 2021 155 $5.05B +$722M -$249M +$474M AGL, ZLAB, AGIO, HUM, ALGN 13F-HR 8/16/2021, 04:10 PM
Q1 2021 151 $4.58B +$673M -$636M +$36.4M AGIO, HUM, ZLAB, AVIR, UNH 13F-HR 5/17/2021, 01:30 PM
Q4 2020 155 $4.72B +$678M -$269M +$410M NBIX, IRTC, UNH, HUM, ZLAB 13F-HR 2/16/2021, 12:41 PM
Q3 2020 148 $3.94B +$449M -$124M +$326M IRTC, NBIX, IMMU, UNH, HUM 13F-HR 11/16/2020, 01:09 PM
Q2 2020 143 $3.65B +$566M -$51M +$515M NBIX, UNH, CNC, IRTC, BPMC 13F-HR 8/14/2020, 01:35 PM
Q1 2020 131 $2.42B +$364M -$256M +$108M NBIX, ISRG, UNH, BIIB, IRTC 13F-HR 5/15/2020, 09:19 AM
Q4 2019 130 $3.16B +$489M -$159M +$330M UNH, NBIX, WCG, AMRN, ISRG 13F-HR 2/14/2020, 08:18 AM
Q3 2019 138 $2.51B +$249M -$86.1M +$163M UNH, NBIX, WCG, ISRG, AMRN 13F-HR 11/14/2019, 08:44 AM
Q2 2019 135 $2.76B +$285M -$47.8M +$237M UNH, GWPH, WCG, AMRN, NBIX 13F-HR 8/14/2019, 09:35 AM
Q1 2019 131 $2.59B +$211M -$71.8M +$139M UNH, GWPH, AMRN, ISRG, WCG 13F-HR 5/15/2019, 10:32 AM
Q4 2018 133 $2.12B +$185M -$124M +$61.4M UNH, WCG, ISRG, AMRN, GWPH 13F-HR 2/14/2019, 01:48 PM
Q3 2018 144 $2.76B +$198M -$111M +$87.1M UNH, ISRG, MOH, NBIX, WCG 13F-HR 11/14/2018, 09:31 AM
Q2 2018 147 $2.6B +$256M -$75.1M +$181M UNH, MDGL, ISRG, NBIX, GWPH 13F-HR 8/14/2018, 09:47 AM
Q1 2018 149 $2.34B +$449M -$36.8M +$413M UNH, ISRG, ABBV, ALXN, NBIX 13F-HR 5/15/2018, 09:43 AM
Q4 2017 145 $2.2B +$274M -$68.6M +$205M UNH, AAAP, CIXXXX, ALXN, ISRG 13F-HR 2/14/2018, 08:33 AM
Q3 2017 147 $2.17B +$206M -$52.8M +$153M UNH, ALXN, TSRO, AET, ACHC 13F-HR 11/14/2017, 08:17 AM
Q2 2017 149 $1.98B +$361M -$60.9M +$301M TSRO, ACHC, AET, UNH, ALXN 13F-HR 8/14/2017, 06:52 AM
Q1 2017 140 $1.73B +$143M -$80.3M +$62.9M TSRO, ACHC, ALXN, MRK, PCRX 13F-HR 5/15/2017, 01:37 PM
Q4 2016 133 $1.49B +$172M -$32.2M +$140M TSRO, ALXN, AET, MRK, GWPH 13F-HR 2/14/2017, 12:02 PM
Q3 2016 137 $1.6B +$206M -$21M +$185M TSRO, AET, RDUS, ACHC, GWPH 13F-HR 11/14/2016, 12:57 PM
Q2 2016 137 $1.35B +$196M -$7.27M +$188M AET, ACHC, AGN, TSRO, PFE 13F-HR 8/15/2016, 01:04 PM
Q1 2016 127 $1.19B +$156M -$3.74M +$152M AET, AGN, ACHC, HCA, BXLT 13F-HR 5/16/2016, 12:54 PM
Q4 2015 120 $1.32B +$261M -$96.1M +$165M AGN, AET, ACHC, ALXN, RDUS 13F-HR 2/16/2016, 12:06 PM
Q3 2015 121 $1.23B +$273M -$83.5M +$189M ACHC, AET, ABBV, RDUS, HCA 13F-HR 11/16/2015, 12:41 PM
Q2 2015 117 $1.37B +$360M -$19.1M +$341M ABBV, MDT, VRX, ACHC, HCA 13F-HR 8/14/2015, 01:40 PM
Q1 2015 105 $1.07B +$352M -$22.1M +$330M MDT, ABBV, MCK, B108PS, HCA 13F-HR 5/15/2015, 01:05 PM
Q4 2014 93 $855M +$231M -$27.7M +$203M MDTXXXX, ABBV, F113PS, HCA, MCK 13F-HR 2/17/2015, 01:01 PM
Q3 2014 82 $644M +$140M -$5.95M +$134M GILD, MDTXXXX, ABBV, MRK, MCK 13F-HR 11/14/2014, 03:10 PM
Q2 2014 78 $558M +$207M -$9.19M +$198M GILD, MRK, MDTXXXX, ITMN, MCK 13F-HR 8/14/2014, 03:11 PM
Q1 2014 75 $434M +$180M -$16.5M +$163M JNJ, GILD, ABBV, BIIB, MCK 13F-HR 5/15/2014, 03:05 PM
Q4 2013 69 $280M GILD, XLV, BIIB, ABBV, CELG 13F-HR 2/14/2014, 03:32 PM