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  Name: Rock Springs Capital Management LP
  City: Baltimore
  State: MD
  Zip: 21202
   
Achive data
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Portfolio Summary View Filing
  Filing Report Date : 2023-12-31
  Total Value : $4,042,223,000
  Total Value Change : $317,379,000
  Securities Held Change : -17
   
All Securities Held : 99
  New Positions : 3
  Closed Positions : 20
  Increased Positions : 35
  Unchanged Positions : 32
  Decreased Positions : 29

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Holdings Found : 100     View All Holdings Currently Viewing:  ALL     Page 1 of 1
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Ticker Company Name Position
Rank
New/Closed
Postion
Last
Close
    Value Shares Held
% of
Portfolio
Value
Change
Change In
Shares Held
   % of Company    Industry
   (BPMC)1 Year Chart         BPMC Blueprint Medicines Corp 1 - $93.00 $265,796,000 2,881,567 6.58% 130,941,000 196,273 4.366    N/A
   (IMCR)1 Year Chart         IMCR Immunocore Holdings Adr 2 - $58.46 $181,834,000 2,661,507 4.5% 29,055,000 -282,203 6.078    N/A
   (KRTX)1 Year Chart         KRTX Karuna Therapeutics, Inc. 3 - $0.00 $163,010,000 515,024 4.03% 77,546,000 9,591 1.279    N/A
   (NBIX)1 Year Chart         NBIX Neurocrine Biosciences Inc 4 - $135.99 $157,585,000 1,196,000 3.9% 18,535,000 -40,000 1.28    Biotechnology
   (HUM)1 Year Chart         HUM Humana Inc 5 - $305.90 $141,921,000 310,000 3.51% -70,445,000 -126,500 0.234    Health Care Plans
   (PEN)1 Year Chart         PEN Penumbra Inc 6 - $204.41 $135,203,000 537,500 3.34% 13,341,000 33,750 1.48    N/A
   (EVH)1 Year Chart         EVH Evolent Health, Inc. 7 - $27.65 $130,799,000 3,960,000 3.24% 25,555,000 95,000 3.39    N/A
   (UNH)1 Year Chart         UNH Unitedhealth Group Inc 8 - $495.35 $121,088,000 230,000 3% 5,124,000 0 0.024    Health Care Plans
   (CERE)1 Year Chart         CERE Cerevel Therapeutics Holdin... 9 - $42.47 $113,388,000 2,674,245 2.81% 58,177,000 145,129 1.711    N/A
   (AGL)1 Year Chart         AGL Agilon Health, Inc. 10 - $5.00 $108,307,000 8,630,000 2.68% -38,968,000 337,500 1.841    N/A
   (ISRG)1 Year Chart         ISRG Intuitive Surgical Inc 11 - $372.63 $100,702,000 298,500 2.49% 13,453,000 0 0.083    Medical Appliances & ...
   (IDXX)1 Year Chart         IDXX Idexx Laboratories Inc 12 - $499.30 $99,493,000 179,250 2.46% 14,444,000 -15,250 0.21    Diagnostic Substances
   (PODD)1 Year Chart         PODD Insulet Corp 13 - $166.19 $93,681,000 431,750 2.32% 33,075,000 51,750 0.567    Medical Instruments &...
   (ARGX)1 Year Chart         ARGX Argenx Se 14 - $372.80 $87,214,000 229,250 2.16% -40,118,000 -29,750 0.488    N/A
   (RARE)1 Year Chart         RARE Ultragenyx Pharmaceutical Inc 15 - $44.24 $83,878,000 1,754,038 2.08% 31,243,000 277,597 2.573    Restaurants
   (ACHC)1 Year Chart         ACHC Acadia Healthcare Company Inc 16 - $73.18 $83,475,000 1,073,500 2.07% 19,634,000 165,500 1.083    N/A
   (EXAS)1 Year Chart         EXAS Exact Sciences Corp 17 - $58.85 $75,423,000 1,019,500 1.87% 5,958,000 1,250 0.574    Biotechnology
   (DXCM)1 Year Chart         DXCM DexCom Inc 18 - $124.34 $73,958,000 596,000 1.83% 19,471,000 12,000 0.153    Medical Instruments &...
   (BSX)1 Year Chart         BSX Boston Scientific Corp 19 - $73.17 $71,251,000 1,232,500 1.76% 10,003,000 72,500 0.086    Medical Instruments &...
   (RYTM)1 Year Chart         RYTM Rhythm Pharmaceuticals, Inc. 20 - $38.28 $70,007,000 1,522,893 1.73% 33,393,000 -74,230 2.482    N/A
   (ALGN)1 Year Chart         ALGN Align Technology Inc 21 - $309.02 $60,280,000 220,000 1.49% -5,974,000 3,000 0.279    Medical Appliances & ...
   (XENE)1 Year Chart         XENE Xenon Pharmaceuticals Inc. 22 - $0.00 $57,832,000 1,255,577 1.43% 17,591,000 77,575 2.008    N/A
   (FRPT)1 Year Chart         FRPT Freshpet, Inc. 23 - $106.36 $57,479,000 662,500 1.42% 13,833,000 0 1.079    N/A
   (MIRM)1 Year Chart         MIRM Mirum Pharmaceuticals, Inc. 24 - $0.00 $54,655,000 1,851,464 1.35% -2,880,000 30,731 5.022    N/A
   (EW)1 Year Chart         EW Edwards Lifesciences Corp 26 - $29.43 $49,357,000 647,300 1.22% 4,512,000 0 0.104    Medical Appliances & ...
   (MRTX)1 Year Chart         MRTX Mirati Therapeutics, Inc. 27 - $58.70 $49,102,000 835,776 1.21% -173,000 -295,431 1.249    Biotechnology
   (WST)1 Year Chart         WST West Pharmaceutical Service... 28 - $360.43 $48,328,000 137,250 1.2% -27,464,000 -64,750 0.186    Rubber & Plastics
   (AGIO)1 Year Chart         AGIO Agios Pharmaceuticals Inc 29 - $31.49 $47,929,000 2,152,173 1.19% -19,145,000 -557,888 3.114    N/A
   (MDGL)1 Year Chart         MDGL Madrigal Pharmaceuticals Inc 30 - $193.33 $45,852,000 198,169 1.13% 17,174,000 1,800 1.195    Diagnostic Substances
   (ALNY)1 Year Chart         ALNY Alnylam Pharmaceuticals Inc 31 - $143.31 $44,981,000 235,000 1.11% -4,518,000 -44,500 0.191    Biotechnology
   (OLK)1 Year Chart         OLK Olink Holding Ab Publ Adr 32 - $0.00 $42,164,000 1,676,500 1.04% 17,436,000 0 1.409    N/A
   (ACCD)1 Year Chart         ACCD Accolade, Inc. 33 - $7.89 $41,855,000 3,485,000 1.04% 11,035,000 572,000 4.894    N/A
   (IMVT)1 Year Chart         IMVT Immunovant Inc 34 - $0.00 $41,426,000 983,301 1.02% 16,690,000 338,957 1.129    N/A
   (LLY)1 Year Chart         LLY Eli Lilly & Co 35 New $733.51 $40,513,000 69,500 1% 40,513,000 69,500 0.007    Drug Manufacturers - ...
   (KYMR)1 Year Chart         KYMR Kymera Therapeutics, Inc. 36 - $0.00 $38,756,000 1,522,238 0.96% 17,846,000 17,887 2.535    N/A
   (CLDX)1 Year Chart         CLDX Celldex Therapeutics Inc 37 - $36.30 $38,456,000 969,646 0.95% 24,693,000 469,545 1.852    Diagnostic Substances
   (IRTC)1 Year Chart         IRTC Irhythm Technologies, Inc. 38 - $111.91 $37,544,000 350,750 0.93% 4,482,000 0 0.999    N/A
   (ASND)1 Year Chart         ASND Ascendis Pharma AS 39 - $135.90 $36,526,000 290,000 0.9% -3,318,000 -135,500 0.449    N/A
   (PCRX)1 Year Chart         PCRX Pacira Pharmaceuticals, Inc. 40 - $26.33 $35,613,000 1,055,500 0.88% 3,230,000 0 2.134    Drug Manufacturers - ...
   (LFST)1 Year Chart         LFST Lifestance Health Group, Inc. 41 - $6.20 $35,509,000 4,535,000 0.88% 10,296,000 865,000 1.214    N/A
   (BRKS)1 Year Chart         BRKS Brooks Automation Inc 42 - $52.18 $33,059,000 507,500 0.82% 9,093,000 30,000 0.687    Semiconductor Equipme...
   (SRPT)1 Year Chart         SRPT Sarepta Therapeutics Inc 43 - $128.77 $31,590,000 327,600 0.78% -15,928,000 -64,400 0.389    Drug Manufacturers - ...
   (ZLAB)1 Year Chart         ZLAB Zai Lab Ltd 44 - $15.91 $31,075,000 1,137,023 0.77% 1,003,000 -100,000 1.292    N/A
   (LEGN)1 Year Chart         LEGN Churchill Cap Corp Iii 45 - $45.30 $29,630,000 492,444 0.73% -1,152,000 34,179 0.381    N/A
   (WRBY)1 Year Chart         WRBY Warby Parker Inc. 46 - $12.92 $28,599,000 2,028,300 0.71% 7,872,000 453,300 2.114    N/A
   (AKRO)1 Year Chart         AKRO Akero Therapeutics, Inc. 47 - $0.00 $25,243,000 1,081,064 0.62% -46,538,000 -338,086 2.152    N/A
   (TVTX)1 Year Chart         TVTX Travere Therapeutics, Inc 48 - $5.26 $24,915,000 2,771,446 0.62% 8,754,000 963,704 3.163    N/A
   (MRUS)1 Year Chart         MRUS Merus Nv 49 - $45.04 $23,982,000 872,069 0.59% 4,212,000 33,641 2.044    N/A
   (DVAX)1 Year Chart         DVAX Dynavax Technologies Corp 50 - $11.21 $23,423,000 1,675,474 0.58% -3,366,000 -138,284 1.243    Drug Manufacturers - ...
   (SWAV)1 Year Chart         SWAV Shockwave Medical, Inc. 51 - $330.00 $22,867,000 120,000 0.57% -6,500,000 -27,500 0.35    N/A
   (PRTA)1 Year Chart         PRTA Prothena Corp Plc 52 - $20.87 $22,714,000 625,048 0.56% -6,926,000 10,750 1.211    N/A
   (IMGN)1 Year Chart         IMGN Immunogen Inc 53 - $31.23 $22,515,000 759,365 0.56% 10,464,000 0 0.344    Drug Manufacturers - ...
   (NVRO)1 Year Chart         NVRO Nevro Corp 54 - $11.32 $22,058,000 1,025,000 0.55% -1,229,000 -186,600 2.76    N/A
   (AMGN)1 Year Chart         AMGN Amgen Inc 55 - $269.98 $21,457,000 74,500 0.53% 3,181,000 6,500 0.013    Biotechnology
   (IRON)1 Year Chart         IRON Disc Medicine, Inc 56 - $27.55 $20,994,000 363,468 0.52% 3,918,000 0 2.088    N/A
   (RVMD)1 Year Chart         RVMD Revolution Medicines, Inc. 57 - $35.96 $20,797,000 725,152 0.51% 725,000 0 0.633    N/A
   (INSP)1 Year Chart         INSP Inspire Medical Systems Inc 58 - $237.45 $20,140,000 99,000 0.5% 11,309,000 54,500 0.344    N/A
   (IMTX)1 Year Chart         IMTX Immatics N.V 59 - $10.01 $19,749,000 1,875,466 0.49% -1,969,000 0 2.981    N/A
   (BCRX)1 Year Chart         BCRX Biocryst Pharmaceuticals Inc 60 - $4.16 $19,590,000 3,270,381 0.48% 1,527,000 719,155 1.852    Biotechnology
   (MREO)1 Year Chart         MREO Mereo Biopharma Group plc 61 - $2.74 $18,443,000 7,983,851 0.46% 8,540,000 307,370 7.375    N/A
   (COLL)1 Year Chart         COLL Collegium Pharmaceutical, Inc 62 - $36.42 $17,298,000 562,000 0.43% 4,737,000 0 1.354    N/A
   (INZY)1 Year Chart         INZY Inozyme Pharma, Inc. 63 - $0.00 $15,682,000 3,681,174 0.39% 221,000 0 5.961    N/A
   (FOLD)1 Year Chart         FOLD Amicus Therapeutics Inc 64 - $10.61 $15,095,000 1,063,806 0.37% 2,159,000 0 0.313    Biotechnology
   (BMRN)1 Year Chart         BMRN Biomarin Pharmaceutical Inc 65 - $88.63 $14,350,000 148,832 0.36% -9,053,000 -115,668 0.079    Drug Manufacturers - ...
   (ICVX)1 Year Chart         ICVX Icosavax, Inc. 66 - $0.00 $13,686,000 868,409 0.34% 6,956,000 0 2.205    N/A
   (KRYS)1 Year Chart         KRYS Krystal Biotech Inc 67 - $156.88 $12,898,000 103,969 0.32% 2,393,000 13,409 0.417    N/A
   (GPCR)1 Year Chart         GPCR Structure Therapeutics Inc. 68 New $38.94 $11,685,000 286,676 0.29% 11,685,000 286,676 0.749    N/A
   (MGNX)1 Year Chart         MGNX Macrogenics Inc 69 - $14.56 $11,340,000 1,178,796 0.28% 5,847,000 0 1.918    Biotechnology
   (MLYS)1 Year Chart         MLYS Mineralys Therapeutics, Inc. 70 - $0.00 $10,040,000 1,167,492 0.25% -1,063,000 0 2.857    N/A
   (ABOS)1 Year Chart         ABOS Acumen Pharmaceuticals, Inc. 71 - $0.00 $8,832,000 2,300,059 0.22% -2,840,000 -512,520 5.683    N/A
   (CMPX)1 Year Chart         CMPX Compass Therapeutics Ord Shs 72 - $0.00 $8,602,000 5,513,788 0.21% -2,260,000 0 5.625    N/A
   (LUNG)1 Year Chart         LUNG Pulmonx Corp 73 - $0.00 $8,318,000 652,400 0.21% 1,579,000 0 1.738    N/A
   (AMLX)1 Year Chart         AMLX Amylyx Pharmaceuticals, Inc. 74 - $0.00 $7,875,000 535,012 0.19% -20,414,000 -1,010,004 0.925    N/A
   (SPRB)1 Year Chart         SPRB Spruce Biosciences, Inc. 75 - $0.00 $7,645,000 2,609,125 0.19% 1,479,000 -119,000 6.984    N/A
   (RLAY)1 Year Chart         RLAY Relay Therapeutics, Inc. 76 - $6.37 $7,420,000 673,966 0.18% 1,752,000 0 0.498    N/A
   (EDAP)1 Year Chart         EDAP EDAP TMS S.A. (ADR) 77 - $7.28 $7,320,000 1,386,425 0.18% -2,227,000 26,425 4.758    Medical Appliances & ...
   (MRSN)1 Year Chart         MRSN Mersana Therapeutics, Inc. 78 - $2.94 $7,069,000 3,046,782 0.17% 2,747,000 -356,351 2.718    N/A
   (PLRX)1 Year Chart         PLRX Pliant Therapeutics, Inc. 79 - $0.00 $6,972,000 384,996 0.17% -1,546,000 -106,225 0.612    N/A
   (OSCR)1 Year Chart         OSCR Oscar Health, Inc. 80 New $0.00 $6,725,000 735,000 0.17% 6,725,000 735,000 0.437    N/A
   (FULC)1 Year Chart         FULC Fulcrum Therapeutics, Inc. 81 - $0.00 $4,912,000 727,673 0.12% 1,681,000 0 1.155    N/A
   (EPIX)1 Year Chart         EPIX ESSA Pharma Inc 82 - $0.00 $4,468,000 677,005 0.11% 2,376,000 0 1.539    Diagnostic Substances
   (SGMT)1 Year Chart         SGMT Sagimet Biosciences Inc. 83 - $4.06 $4,002,000 738,355 0.1% -2,496,000 0 3.457    N/A
   (AUPH)1 Year Chart         AUPH Aurinia Pharmaceuticals Inc 84 - $4.91 $3,709,000 412,570 0.09% -17,000 -66,970 0.326    N/A
   (LPTX)1 Year Chart         LPTX Leap Therapeutics, Inc. 85 - $3.25 $3,453,000 832,937 0.09% 1,970,000 -241,580 1.396    N/A
   (ACRS)1 Year Chart         ACRS Aclaris Therapeutics, Inc. 86 - $1.20 $3,148,000 2,998,495 0.08% -23,981,000 -961,954 4.05    N/A
   (BEAM)1 Year Chart         BEAM Beam Therapeutics Inc. 87 - $21.38 $3,033,000 111,430 0.08% 353,000 0 0.177    N/A
   (APLT)1 Year Chart         APLT Applied Therapeutics Inc. 88 - $0.00 $2,999,000 895,195 0.07% 985,000 86,386 1.865    N/A
   (GOSS)1 Year Chart         GOSS Gossamer Bio Inc 89 - $0.67 $2,981,000 3,266,960 0.07% 260,000 0 3.458    N/A
   (BMEA)1 Year Chart         BMEA Biomea Fusion, Inc. 90 - $10.78 $2,630,000 181,147 0.07% 137,000 0 0.63    N/A
   (NVAX)1 Year Chart         NVAX Novavax Inc 91 - $0.36 $2,581,000 537,625 0.06% -2,108,000 -110,075 0.453    Biotechnology
   (CGEN)1 Year Chart         CGEN Compugen Ltd (USA) 92 - $1.92 $2,554,000 1,289,990 0.06% 1,354,000 0 1.557    Biotechnology
   (ADAP)1 Year Chart         ADAP Adaptimmune Therapeutics PLC 93 - $1.08 $1,923,000 2,425,468 0.05% -252,000 -362,377 1.568    N/A
   (VIGL)1 Year Chart         VIGL Vigil Neuroscience, Inc. 94 - $0.00 $1,595,000 471,958 0.04% -949,000 0 1.669    N/A
   (RPHM)1 Year Chart         RPHM Reneo Pharmaceuticals, Inc. 95 - $1.67 $1,203,000 751,730 0.03% -7,502,000 -391,455 3.095    N/A
   (VINC)1 Year Chart         VINC Vincerx Pharma, Inc 96 - $0.73 $1,052,000 891,719 0.03% 151,000 0 4.242    N/A
   (XLO)1 Year Chart         XLO Xilio Therapeutics, Inc. 97 - $0.00 $792,000 1,440,759 0.02% -2,248,000 0 5.402    N/A
   (ACRX)1 Year Chart         ACRX Acelrx Pharmaceuticals Inc 98 - $1.05 $233,000 316,460 0.01% 49,000 0 3.859    Conglomerates
   (NUVB.WS)1 Year Chart         NUVB.WS Nuvation Equity Warrants Ex... 99 - $0.00 $8,000 134,028 0% -5,000 0 1.489    N/A
   (GMDA)1 Year Chart         GMDA Gamida Cell Ord Shs 118 Closed $0.00 $0 0 0% -54,000 -52,015 0    N/A
   (HZNP)1 Year Chart         HZNP Horizon Pharma, Inc. 105 Closed $28.30 $0 0 0% -29,559,000 -255,500 0    Drug Manufacturers - ...

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