13F Filings History of Rock Springs Capital Management LP

Latest 13F report
Q3 2025 - 14 Nov 2025
Value $
$1,710,624,862
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 92 stock holdings with total value $1,710,624,862 as of Q3 2025. Top holdings included ARGX, LLY, RYTM, MDGL, and RVMD.

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Holdings Value
Quarter Holdings Value $ Bought Sold Net Top Holdings Form Type Filing Time
Q3 2025 92 $1,710,624,862 +$75,473,056 -$271,937,027 -$196,463,971 ARGX, LLY, RYTM, MDGL, RVMD 13F-HR 14 Nov 2025, 10:19
Q2 2025 93 $1,604,789,362 +$152,029,545 -$389,655,856 -$237,626,311 ARGX, LLY, MRUS, RYTM, INSM 13F-HR 14 Aug 2025, 08:55
Q1 2025 96 $1,747,790,415 +$68,334,713 -$792,073,974 -$723,739,261 ARGX, LLY, BPMC, MDGL, UNH 13F-HR 15 May 2025, 08:16
Q4 2024 107 $2,626,669,578 +$185,271,741 -$461,091,180 -$275,819,439 ARGX, ISRG, LLY, NBIX, BPMC 13F-HR 14 Feb 2025, 08:27
Q3 2024 109 $3,073,721,559 +$173,597,869 -$559,263,761 -$385,665,892 UNH, ISRG, ARGX, LLY, RARE 13F-HR 14 Nov 2024, 09:07
Q2 2024 110 $3,313,658,128 +$230,891,447 -$617,565,463 -$386,674,016 BPMC, UNH, ISRG, NBIX, LLY 13F-HR 14 Aug 2024, 10:48
Q1 2024 109 $3,914,050,197 +$401,226,925 -$552,013,841 -$150,786,916 BPMC, IMCR, NBIX, EVH, ISRG 13F-HR 15 May 2024, 10:09
Q4 2023 103 $4,050,716,785 +$256,674,891 -$438,158,498 -$181,483,607 BPMC, IMCR, KRTX, NBIX, HUM 13F-HR 14 Feb 2024, 11:13
Q3 2023 127 $3,726,199,063 +$267,562,556 -$301,919,355 -$34,356,799 HUM, IMCR, AGL, NBIX, BPMC 13F-HR 14 Nov 2023, 12:58
Q2 2023 128 $4,203,227,606 +$144,618,335 -$297,199,343 -$152,581,008 HUM, IMCR, PODD, AGL, BPMC 13F-HR 14 Aug 2023, 10:21
Q1 2023 120 $4,191,235,860 +$180,213,519 -$69,405,664 +$110,807,855 HUM, AGL, PODD, IMCR, ARGX 13F-HR 15 May 2023, 09:58
Q4 2022 119 $4,155,882,856 +$243,659,844 -$69,652,749 +$174,007,095 HUM, IMCR, PODD, UNH, NBIX 13F-HR 14 Feb 2023, 10:12
Q3 2022 127 $3,870,513,000 +$300,573,335 -$49,462,589 +$251,110,746 HUM, AGL, IMCR, UNH, ARGX 13F-HR 14 Nov 2022, 11:57
Q2 2022 130 $3,436,042,000 +$375,907,905 -$43,278,967 +$332,628,938 HUM, AGL, UNH, ARGX, NBIX 13F-HR 15 Aug 2022, 11:24
Q1 2022 134 $3,972,508,000 +$282,524,435 -$64,684,253 +$217,840,182 AGL, HUM, PODD, UNH, IDXX 13F-HR 16 May 2022, 10:02
Q4 2021 135 $4,327,978,000 +$336,958,203 -$77,642,967 +$259,315,236 AGL, HUM, ALGN, ISRG, PODD 13F-HR 14 Feb 2022, 12:35
Q3 2021 153 $4,755,966,000 +$464,039,845 -$382,134,709 +$81,905,136 AGL, HUM, ALGN, PODD, ISRG 13F-HR 15 Nov 2021, 16:40
Q2 2021 155 $5,049,846,000 +$722,494,833 -$248,507,616 +$473,987,217 AGL, ZLAB, AGIO, HUM, ALGN 13F-HR 16 Aug 2021, 16:10
Q1 2021 151 $4,583,741,000 +$672,892,637 -$636,480,932 +$36,411,705 AGIO, HUM, ZLAB, AVIR, UNH 13F-HR 17 May 2021, 13:30
Q4 2020 155 $4,716,262,000 +$678,181,548 -$268,523,030 +$409,658,518 NBIX, IRTC, UNH, HUM, ZLAB 13F-HR 16 Feb 2021, 12:41
Q3 2020 148 $3,941,221,000 +$449,475,980 -$123,509,304 +$325,966,676 IRTC, NBIX, IMMU, UNH, HUM 13F-HR 16 Nov 2020, 13:09
Q2 2020 143 $3,645,815,000 +$566,375,971 -$50,961,870 +$515,414,101 NBIX, UNH, CNC, IRTC, BPMC 13F-HR 14 Aug 2020, 13:35
Q1 2020 131 $2,418,471,000 +$363,933,176 -$256,212,707 +$107,720,469 NBIX, ISRG, UNH, BIIB, IRTC 13F-HR 15 May 2020, 09:19
Q4 2019 130 $3,164,999,000 +$488,941,108 -$159,149,047 +$329,792,061 UNH, NBIX, WCG, AMRN, ISRG 13F-HR 14 Feb 2020, 08:18
Q3 2019 138 $2,509,651,000 +$248,826,924 -$86,113,116 +$162,713,808 UNH, NBIX, WCG, ISRG, AMRN 13F-HR 14 Nov 2019, 08:44
Q2 2019 135 $2,764,118,000 +$284,589,037 -$47,777,435 +$236,811,602 UNH, GWPH, WCG, AMRN, NBIX 13F-HR 14 Aug 2019, 09:35
Q1 2019 131 $2,593,735,000 +$210,621,160 -$71,819,736 +$138,801,424 UNH, GWPH, AMRN, ISRG, WCG 13F-HR 15 May 2019, 10:32
Q4 2018 133 $2,118,545,000 +$185,350,914 -$123,981,044 +$61,369,870 UNH, WCG, ISRG, AMRN, GWPH 13F-HR 14 Feb 2019, 13:48
Q3 2018 144 $2,762,039,000 +$198,073,574 -$110,938,566 +$87,135,008 UNH, ISRG, MOH, NBIX, WCG 13F-HR 14 Nov 2018, 09:31
Q2 2018 147 $2,598,744,000 +$256,038,009 -$75,051,662 +$180,986,347 UNH, MDGL, ISRG, NBIX, GWPH 13F-HR 14 Aug 2018, 09:47
Q1 2018 149 $2,344,209,000 +$449,433,426 -$36,750,630 +$412,682,796 UNH, ISRG, ABBV, ALXN, NBIX 13F-HR 15 May 2018, 09:43
Q4 2017 145 $2,203,927,000 +$273,673,959 -$68,645,589 +$205,028,370 UNH, AAAP, CIXXXX, ALXN, ISRG 13F-HR 14 Feb 2018, 08:33
Q3 2017 147 $2,167,567,000 +$205,657,527 -$52,789,040 +$152,868,487 UNH, ALXN, TSRO, AET, ACHC 13F-HR 14 Nov 2017, 08:17
Q2 2017 149 $1,980,252,000 +$361,411,641 -$60,869,486 +$300,542,155 TSRO, ACHC, AET, UNH, ALXN 13F-HR 14 Aug 2017, 06:52
Q1 2017 140 $1,733,063,000 +$143,145,093 -$80,293,391 +$62,851,702 TSRO, ACHC, ALXN, MRK, PCRX 13F-HR 15 May 2017, 13:37
Q4 2016 133 $1,494,403,000 +$171,728,003 -$32,176,196 +$139,551,807 TSRO, ALXN, AET, MRK, GWPH 13F-HR 14 Feb 2017, 12:02
Q3 2016 137 $1,595,270,000 +$205,577,966 -$20,994,003 +$184,583,963 TSRO, AET, RDUS, ACHC, GWPH 13F-HR 14 Nov 2016, 12:57
Q2 2016 137 $1,350,771,000 +$195,583,594 -$7,269,764 +$188,313,830 AET, ACHC, AGN, TSRO, PFE 13F-HR 15 Aug 2016, 13:04
Q1 2016 127 $1,188,635,000 +$155,581,800 -$3,743,272 +$151,838,528 AET, AGN, ACHC, HCA, BXLT 13F-HR 16 May 2016, 12:54
Q4 2015 120 $1,319,729,000 +$261,251,969 -$96,054,082 +$165,197,887 AGN, AET, ACHC, ALXN, RDUS 13F-HR 16 Feb 2016, 12:06
Q3 2015 121 $1,231,971,000 +$272,824,172 -$83,482,308 +$189,341,864 ACHC, AET, ABBV, RDUS, HCA 13F-HR 16 Nov 2015, 12:41
Q2 2015 117 $1,369,933,000 +$359,840,220 -$19,078,835 +$340,761,385 ABBV, MDT, VRX, ACHC, HCA 13F-HR 14 Aug 2015, 13:40
Q1 2015 105 $1,069,136,000 +$351,728,589 -$22,104,973 +$329,623,616 MDT, ABBV, MCK, B108PS, HCA 13F-HR 15 May 2015, 13:05
Q4 2014 93 $854,895,000 +$230,704,102 -$27,680,882 +$203,023,220 MDTXXXX, ABBV, F113PS, HCA, MCK 13F-HR 17 Feb 2015, 13:01
Q3 2014 82 $644,013,000 +$140,406,064 -$5,946,812 +$134,459,252 GILD, MDTXXXX, ABBV, MRK, MCK 13F-HR 14 Nov 2014, 15:10
Q2 2014 78 $557,716,000 +$207,404,575 -$9,187,636 +$198,216,939 GILD, MRK, MDTXXXX, ITMN, MCK 13F-HR 14 Aug 2014, 15:11
Q1 2014 75 $433,561,000 +$179,700,522 -$16,546,636 +$163,153,886 JNJ, GILD, ABBV, BIIB, MCK 13F-HR 15 May 2014, 15:05
Q4 2013 69 $279,910,000 $0 GILD, XLV, BIIB, ABBV, CELG 13F-HR 14 Feb 2014, 15:32