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13F-HR filed by Rock Springs Capital Management LP

Rock Springs Capital Management LP filed this 13F-HR for the quarter ended 2017-03-31, filed 2017-05-15, with 140 holding rows worth $1,733,063,000.

Accession
0001172661-17-001168
Filed
2017-05-15
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q1 2017

A holdings report, 140 entries on the cover page, a total value of $1,733,063,000 stated on the cover page (in dollars after the unit check, H1), rows summing to $1,733,063,000 with VALUE read as thousands by filing date, 13F file number 028-16048. The quarter's positions are built on this report. The resolved quarter.

The information table after summing rows of one CUSIP and put or call (H4), with the CUSIP and issuer name as filed. Values in dollars after the unit check (method).

Issuer as filedCUSIPClassAmountValueValue read asType
TESARO INC881569107COM474,900$73,073,000thousands by filing date
ACADIA HEALTHCARE COMPANY INC COM00404A109Stock1,275,000$55,590,000thousands by filing date
ALEXION PHARMACEUTICALS INC015351109COM456,900$55,395,000thousands by filing date
Merck & Co.,Inc.58933Y105COM750,000$47,655,000thousands by filing date
PACIRA BIOSCIENCES INC COM695127100Stock1,000,000$45,600,000thousands by filing date
GW PHARMACEUTICALS PLC36197T103ADS356,500$43,115,000thousands by filing date
ALLERGAN PLCG0177J108SHS166,000$39,661,000thousands by filing date
CIGNA CORPORATION125509109COM270,000$39,552,000thousands by filing date
Intuitive Surgical,Inc.46120E602COM48,000$36,791,000thousands by filing date
RADIUS HEALTH INC750469207COM NEW910,250$35,181,000thousands by filing date
MEDICINES CO584688105COM700,000$34,230,000thousands by filing date
ADVANCED ACCELERATOR APPLIC SPONSORED ADS00790T100ADR850,000$33,881,000thousands by filing date
SPARK THERAPEUTICS INC84652J103COM625,000$33,338,000thousands by filing date
WELLCARE HEALTH PLANS INC94946T106COM234,500$32,879,000thousands by filing date
CELGENE CORP151020104COM242,500$30,174,000thousands by filing date
PRA HEALTH SCIENCES INC69354M108COM457,500$29,843,000thousands by filing date
AETNA INC NEW00817Y108COM220,000$28,061,000thousands by filing date
Eli Lilly and Company532457108COM325,000$27,336,000thousands by filing date
HUMANA INC COM444859102Stock132,500$27,314,000thousands by filing date
UnitedHealth Group Inc91324P102COM165,000$27,062,000thousands by filing date
PENUMBRA INC COM70975L107Stock310,500$25,911,000thousands by filing date
ARDELYX INC039697107COM2,000,000$25,300,000thousands by filing date
Bristol-Myers Squibb Company110122108COM452,600$24,612,000thousands by filing date
SHIRE PLC82481R106COMMON STOCK-FO138,900$24,201,000thousands by filing date
INCYTE CORP COM45337C102Stock169,000$22,590,000thousands by filing date
THERAVANCE BIOPHARMA INCG8807B106COM600,000$22,092,000thousands by filing date
Johnson & Johnson478160104COM175,000$21,796,000thousands by filing date
WRIGHT MED GROUP N VN96617118ORD SHS670,000$20,850,000thousands by filing date
ACLARIS THERAPEUTICS INC COM00461U105Stock675,000$20,129,000thousands by filing date
Gilead Sciences,Inc.375558103COM286,500$19,459,000thousands by filing date
LAKEFRONT BIOTHERAPEUTICS NV36315X101SPON ADR210,000$18,100,000thousands by filing date
JAZZ PHARMACEUTICALS PLC SHS USDG50871105Stock123,700$17,953,000thousands by filing date
NEUROCRINE BIOSCIENCES INC64125C109COM410,000$17,753,000thousands by filing date
PROTHENA CORP PLC SHSG72800108Stock309,500$17,267,000thousands by filing date
COLLEGIUM PHARMACEUTICAL INC19459J104COM1,700,000$17,102,000thousands by filing date
RA PHARMACEUTICALS INC74933V108COM788,959$16,797,000thousands by filing date
Amgen Inc.031162100COM98,000$16,079,000thousands by filing date
AMARIN CORP PLC023111206SPONS ADR NEW5,001,200$16,004,000thousands by filing date
HOLOGIC INC436440101COM340,000$14,467,000thousands by filing date
WILLIS TOWERS WATSON PLC LTD SHSG96629103Stock110,000$14,398,000thousands by filing date
COHERUS ONCOLOGY INC19249H103COM675,000$14,276,000thousands by filing date
Danaher Corporation235851102COM160,000$13,685,000thousands by filing date
EDWARDS LIFESCIENCES CORP COM28176E108Stock142,500$13,405,000thousands by filing date
WALGREENS BOOTS ALLIANCE INC931427108COM161,000$13,371,000thousands by filing date
INVITAE CORP46185L103COM1,200,000$13,272,000thousands by filing date
DERMIRA INC24983L104COM387,600$13,221,000thousands by filing date
BIOGEN INC COM09062X103Stock48,000$13,124,000thousands by filing date
CLOVIS ONCOLOGY INC189464100COM184,500$11,747,000thousands by filing date
THERAPEUTICSMD INC88338N107COM1,600,000$11,520,000thousands by filing date
HEALTHSOUTH CORP421924309COM NEW265,000$11,345,000thousands by filing date
BIOMARIN PHARMACEUTICAL INC09061G101COM125,000$10,973,000thousands by filing date
ALMOST FAMILY INC020409108COM225,000$10,935,000thousands by filing date
ULTRAGENYX PHARMACEUTICAL IN90400D108COM159,750$10,828,000thousands by filing date
AVEXIS INC05366U100COM140,000$10,644,000thousands by filing date
PATHEON N VN6865W105SHS400,000$10,536,000thousands by filing date
PARATEK PHARMACEUTICALS INC699374302Equity525,500$10,116,000thousands by filing date
ASSEMBLY BIOSCIENCES INC045396108COM390,000$9,941,000thousands by filing date
Vertex Pharmaceuticals Incorporated92532F100COM90,500$9,896,000thousands by filing date
EPIZYME INC29428V104COM570,000$9,776,000thousands by filing date
BEONE MEDICINES LTD SPONSORED ADS07725L102ADR265,000$9,702,000thousands by filing date
MERUS N VN5749R100COM384,548$9,379,000thousands by filing date
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR325,000$9,100,000thousands by filing date
ENVISION HEALTHCARE CORP29414D100COM145,000$8,891,000thousands by filing date
CORVUS PHARMACEUTICALS INC221015100COM422,600$8,777,000thousands by filing date
ObsEva SAH5861P103COM838,634$8,730,000thousands by filing date
AUDENTES THERAPEUTICS INC.05070R104Common Stock500,000$8,520,000thousands by filing date
INSMED INC COM PAR $.01457669307Stock468,000$8,195,000thousands by filing date
EXACT SCIENCES CORP COM30063P105Stock337,500$7,972,000thousands by filing date
LOXO ONCOLOGY INC548862101COM181,000$7,616,000thousands by filing date
RTI BIOLOGICS INC74975N105COM1,860,000$7,440,000thousands by filing date
CLEARSIDE BIOMEDICAL INC185063104COM935,000$7,424,000thousands by filing date
RETROPHIN INC761299106COM400,000$7,384,000thousands by filing date
ALKERMES PLCG01767105SHS125,000$7,313,000thousands by filing date
ATHENAHEALTH INC04685W103COMMON STOCK62,750$7,071,000thousands by filing date
Egalet Corporation28226BAB0Note 5.50% 4/1/207,800,000$6,455,000thousands by filing dateprincipal
TETRAPHASE PHARMACEUTICALS INC88165N105COMMON STOCK698,000$6,415,000thousands by filing date
AIMMUNE THERAPEUTICS INC.00900T107Common Stock293,000$6,367,000thousands by filing date
ACHILLION PHARMACEUTICALS IN00448Q201COM1,500,000$6,315,000thousands by filing date
NABRIVA THERAPEUTICS AG62957M104SPONSORED ADR525,000$6,300,000thousands by filing date
FIVE PRIME THERAPEUTICS INC.33830X104Common Stock165,000$5,965,000thousands by filing date
INTERSECT ENT INC46071F103COM345,000$5,917,000thousands by filing date
FIBROGEN INC31572Q808COM240,000$5,916,000thousands by filing date
CHINA CORD BLOOD CORPG21107100COM880,000$5,861,000thousands by filing date
REGENERON PHARMACEUTICALS COM75886F107Stock15,100$5,851,000thousands by filing date
SAREPTA THERAPEUTICS INC803607100COM194,000$5,742,000thousands by filing date
GLOBAL BLOOD THERAPEUTICS USD37890U108COM150,000$5,528,000thousands by filing date
AMICUS THERAPEUTICS INC03152W109COM757,500$5,401,000thousands by filing date
LIGAND PHARMACEUTICALS INC53220K504COM NEW50,000$5,292,000thousands by filing date
KITE PHARMA INC49803L109COM67,000$5,259,000thousands by filing date
ADAPTIMMUNE THERAPEUTICS PLC00653A107SPONDS ADR875,000$4,821,000thousands by filing date
MEDICINES CO584688AE5NOTE 2.500% 1/13,000,000$4,744,000thousands by filing dateprincipal
STERIS PLCG84720104SHS USD65,000$4,515,000thousands by filing date
CHINOOK THERAPEUTICS INC.00739L101Common Stock415,000$4,461,000thousands by filing date
JUNO THERAPEUTICS INC48205A109COM197,001$4,371,000thousands by filing date
NOVADAQ TECHNOLOGIES INC COMMON66987G102COM555,000$4,323,000thousands by filing date
ALLERGAN PLCG0177J116PFD CONV SER A5,000$4,242,000thousands by filing date
MACROGENICS INC556099109COM225,000$4,185,000thousands by filing date
AEGLEA BIOTHERAPEUTICS INC00773J103COM524,089$3,904,000thousands by filing date
EXELIXIS INC COM30161Q104Stock175,000$3,792,000thousands by filing date
ALDER BIOPHARMACEUTICALS INC014339105COM182,000$3,786,000thousands by filing date
CARDIOME PHARMA CORP14159U301COM NO PAR1,200,000$3,612,000thousands by filing date
COMPUGEN LTDM25722105ORD825,000$3,548,000thousands by filing date
PROTEOSTASIS THERAPEUTICS IN74373B109COM450,000$3,519,000thousands by filing date
PUMA BIOTECHNOLOGY INC74587V107COMMON STOCK94,500$3,515,000thousands by filing date
MADRIGAL PHARMACEUTICALS INC COM558868105Stock225,000$3,465,000thousands by filing date
RIGEL PHARMACEUTICALS INC766559603COMMON STOCK1,000,000$3,310,000thousands by filing date
INNOVIVA INC45781M101COM235,000$3,250,000thousands by filing date
GLAUKOS CORP COM377322102Stock62,500$3,206,000thousands by filing date
HILL ROM HLDGS INC431475102COM45,000$3,177,000thousands by filing date
INTRA-CELLULAR THERAPIES INC46116X101COMMON STOCK190,000$3,088,000thousands by filing date
GENOCEA BIOSCIENCES INC372427104COM480,000$2,923,000thousands by filing date
BLUEBIRD BIO INC09609G100COM30,500$2,772,000thousands by filing date
CARA THERAPEUTICS INC140755109COM150,000$2,759,000thousands by filing date
ZIMMER BIOMET HOLDINGS INC COM98956P102Stock21,100$2,577,000thousands by filing date
OTONOMY INC68906L105COM210,000$2,573,000thousands by filing date
DBV TECHNOLOGIES S A23306J101ADR73,000$2,571,000thousands by filing date
SERES THERAPEUTICS INC81750R102COM220,000$2,479,000thousands by filing date
CIDARA THERAPEUTICS INC COM NEW171757107Stock300,000$2,340,000thousands by filing date
NEURODERM LTDM74231107ORD SHS84,079$2,232,000thousands by filing date
HEALTHEQUITY INC COM42226A107Stock50,000$2,123,000thousands by filing date
SCYNEXIS INC COM NEW811292101Common Stock760,000$2,098,000thousands by filing date
THERAVANCE BIOPHARMA88339KAA0NOTE 3.250%11/01,500,000$1,899,000thousands by filing dateprincipal
MYOVANT SCIENCES LTDG637AM102COMMON STOCK-FO150,000$1,761,000thousands by filing date
NIVALIS THERAPEUTICS INC65481J109COM600,000$1,752,000thousands by filing date
NOVOCURE LTDG6674U108ORD SHS214,316$1,736,000thousands by filing date
ATYR PHARMA INC002120103COM475,000$1,663,000thousands by filing date
NEWLINK GENETICS CORP651511107COM67,071$1,616,000thousands by filing date
EGALET CORP28226B104COM300,000$1,530,000thousands by filing date
WRIGHT MED GROUP INC98235TAE7NOTE 2.000% 2/11,000,000$1,198,000thousands by filing dateprincipal
NOVAVAX INC670002104COMMON STOCK820,000$1,050,000thousands by filing date
PERRIGO CO PLC SHSG97822103Stock15,600$1,036,000thousands by filing date
DYNAVAX TECHNOLOGIES CORP268158201COM NEW165,000$982,000thousands by filing date
INFINITY PHARMACEUTICALS INC45665G303COM270,000$872,000thousands by filing date
CHIASMA INC16706W102COM492,500$837,000thousands by filing date
VALEANT PHARMACEUTICALS INTL91911K102COM66,400$732,000thousands by filing date
Tandem Diabetes Care, Inc.875372104COM595,000$714,000thousands by filing date
OREXIGEN THERAPEUTICS INC COM NEW686164302Stock165,300$569,000thousands by filing date
ANTHERA PHARMACEUTCLS INC03674U201Common equity shares1,296,568$552,000thousands by filing date
CERULEAN PHARMA INC15708Q105COM625,000$508,000thousands by filing date
DIMENSION THERAPEUTICS INC25433V105COM271,370$475,000thousands by filing date

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001172661-17-001168this filing2017-05-15acceptance time not in the bulk data set