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  Name: Rock Springs Capital Management LP
  City: Baltimore
  State: MD
  Zip: 21202
   
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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 : 29     View All Holdings Currently Viewing:  Decreased Positions     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
   (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
   (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
   (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
   (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
   (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
   (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
   (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
   (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
   (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
   (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
   (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
   (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
   (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 - ...
   (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
   (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
   (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
   (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
   (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
   (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
   (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

      29 Records Found
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