Rock Springs Capital Management LP - Q2 2018 holdings

$2.6 Billion is the total value of Rock Springs Capital Management LP's 147 reported holdings in Q2 2018. The portfolio turnover from Q1 2018 to Q2 2018 was 16.1% .

 Value Shares↓ Weighting
UNH BuyUNITEDHEALTH GROUP INC$139,230,000
+33.5%
567,500
+16.4%
5.36%
+20.4%
MDGL BuyMADRIGAL PHARMACEUTICALS INC$95,738,000
+151.8%
342,300
+5.2%
3.68%
+127.1%
ISRG SellINTUITIVE SURGICAL INC$67,896,000
+14.3%
141,900
-1.4%
2.61%
+3.1%
NBIX BuyNEUROCRINE BIOSCIENCES INC$61,930,000
+23.2%
630,400
+4.0%
2.38%
+11.1%
GWPH BuyGW PHARMACEUTICALS PLCads$61,398,000
+51.4%
440,000
+22.2%
2.36%
+36.6%
ALXN BuyALEXION PHARMACEUTICALS INC$61,144,000
+13.1%
492,500
+1.5%
2.35%
+2.0%
ABBV  ABBVIE INC$55,590,000
-2.1%
600,0000.0%2.14%
-11.7%
WCG BuyWELLCARE HEALTH PLANS INC$54,912,000
+111.6%
223,000
+66.4%
2.11%
+90.9%
MOH SellMOLINA HEALTHCARE INC$53,377,000
+14.2%
545,000
-5.4%
2.05%
+3.0%
ACHC  ACADIA HEALTHCARE COMPANY IN$51,281,000
+4.4%
1,253,5000.0%1.97%
-5.8%
LOXO SellLOXO ONCOLOGY INC$50,292,000
+37.7%
289,900
-8.4%
1.94%
+24.2%
ONCE SellSPARK THERAPEUTICS INC$45,021,000
+8.4%
544,000
-12.8%
1.73%
-2.2%
HCA BuyHCA HEALTHCARE INC$44,118,000
+19.7%
430,000
+13.2%
1.70%
+8.0%
COLL SellCOLLEGIUM PHARMACEUTICAL INC$39,353,000
-19.8%
1,650,000
-14.1%
1.51%
-27.7%
SRPT BuySAREPTA THERAPEUTICS INC$39,324,000
+105.7%
297,500
+15.3%
1.51%
+85.6%
IRTC BuyIRHYTHM TECHNOLOGIES INC$38,942,000
+29.6%
480,000
+0.5%
1.50%
+16.8%
PCRX BuyPACIRA PHARMACEUTICALS INC$38,396,000
+9.6%
1,198,000
+6.5%
1.48%
-1.2%
RDUS BuyRADIUS HEALTH INC$33,154,000
-7.8%
1,125,000
+12.5%
1.28%
-16.8%
BGNE SellBEIGENE LTDsponsored adr$33,052,000
-11.1%
215,000
-2.8%
1.27%
-19.8%
PEN SellPENUMBRA INC$32,707,000
+16.4%
236,750
-2.6%
1.26%
+5.0%
VRTX BuyVERTEX PHARMACEUTICALS INC$32,377,000
+9.8%
190,500
+5.2%
1.25%
-1.0%
EHC BuyENCOMPASS HEALTH CORP$30,474,000
+63.0%
450,000
+37.6%
1.17%
+47.2%
SYK  STRYKER CORP$30,057,000
+4.9%
178,0000.0%1.16%
-5.3%
CELG BuyCELGENE CORP$28,623,000
+3.5%
360,400
+16.2%
1.10%
-6.7%
DVA BuyDAVITA INC$28,366,000
+5.6%
408,500
+0.2%
1.09%
-4.7%
PBYI BuyPUMA BIOTECHNOLOGY INC$28,144,000
+0.2%
475,800
+15.2%
1.08%
-9.7%
TSRO BuyTESARO INC$27,812,000
-15.1%
625,400
+9.1%
1.07%
-23.4%
AXGN BuyAXOGEN INC$27,386,000
+48.6%
545,000
+7.9%
1.05%
+34.1%
PRAH SellPRA HEALTH SCIENCES INC$26,911,000
-17.9%
288,247
-27.0%
1.04%
-25.9%
WMGI  WRIGHT MED GROUP N V$25,960,000
+30.8%
1,000,0000.0%1.00%
+18.1%
GILD BuyGILEAD SCIENCES INC$25,857,000
+9.4%
365,000
+16.5%
1.00%
-1.3%
MDCO  MEDICINES CO$25,323,000
+11.4%
690,0000.0%0.97%
+0.4%
TFX  TELEFLEX INC$24,809,000
+5.2%
92,5000.0%0.96%
-5.1%
ALDR BuyALDER BIOPHARMACEUTICALS INC$24,727,000
+27.3%
1,565,000
+2.3%
0.95%
+14.7%
EW SellEDWARDS LIFESCIENCES CORP$24,019,000
-9.4%
165,000
-13.2%
0.92%
-18.3%
EXAS BuyEXACT SCIENCES CORP$22,720,000
+52.1%
380,000
+2.6%
0.87%
+37.2%
ALGN BuyALIGN TECHNOLOGY INC$22,581,000
+37.3%
66,000
+0.8%
0.87%
+23.8%
INGN BuyINOGEN INC$22,173,000
+63.3%
119,000
+7.7%
0.85%
+47.3%
BAX  BAXTER INTL INC$21,930,000
+13.5%
297,0000.0%0.84%
+2.4%
HRTX BuyHERON THERAPEUTICS INC$20,396,000
+55.2%
525,000
+10.3%
0.78%
+40.2%
TMO SellTHERMO FISHER SCIENTIFIC INC$19,885,000
-15.9%
96,000
-16.2%
0.76%
-24.1%
INCY BuyINCYTE CORP$19,832,000
+30.4%
296,000
+62.2%
0.76%
+17.6%
INSM  INSMED INC$19,511,000
+5.0%
825,0000.0%0.75%
-5.3%
NUVA BuyNUVASIVE INC$19,415,000
+21.9%
372,500
+22.1%
0.75%
+10.0%
FGEN SellFIBROGEN INC$19,218,000
+34.4%
307,000
-0.8%
0.74%
+21.3%
ABC SellAMERISOURCEBERGEN CORP$18,759,000
-26.2%
220,000
-25.4%
0.72%
-33.5%
ZBH BuyZIMMER BIOMET HLDGS INC$17,942,000
+11.6%
161,000
+9.2%
0.69%
+0.6%
MRSN SellMERSANA THERAPEUTICS INC$17,860,000
-12.9%
1,000,000
-23.1%
0.69%
-21.5%
ASMB BuyASSEMBLY BIOSCIENCES INC$17,645,000
-18.9%
450,000
+1.6%
0.68%
-26.9%
ACRS BuyACLARIS THERAPEUTICS INC$17,094,000
+84.1%
856,000
+61.5%
0.66%
+66.2%
ALNY BuyALNYLAM PHARMACEUTICALS INC$17,088,000
+0.3%
173,500
+21.3%
0.66%
-9.5%
GLPG  GALAPAGOS NVspon adr$17,053,000
-7.6%
185,0000.0%0.66%
-16.6%
OBSV BuyOBSEVA SA$16,957,000
+49.6%
1,120,000
+33.3%
0.65%
+35.2%
JAZZ SellJAZZ PHARMACEUTICALS PLC$16,885,000
-9.6%
98,000
-20.8%
0.65%
-18.4%
EPZM SellEPIZYME INC$16,819,000
-25.7%
1,241,253
-2.6%
0.65%
-33.0%
BOLD SellAUDENTES THERAPEUTICS INC$16,812,000
-1.0%
440,000
-22.1%
0.65%
-10.6%
ARNA  ARENA PHARMACEUTICALS INC$16,350,000
+10.4%
375,0000.0%0.63%
-0.5%
ASND SellASCENDIS PHARMA A Ssponsored adr$16,198,000
-12.6%
243,500
-14.1%
0.62%
-21.2%
HOLX  HOLOGIC INC$15,900,000
+6.4%
400,0000.0%0.61%
-3.9%
WST NewWEST PHARMACEUTICAL SVSC INC$15,886,000160,000
+100.0%
0.61%
BHVN BuyBIOHAVEN PHARMACTL HLDG CO L$15,709,000
+87.6%
397,500
+22.3%
0.60%
+69.2%
IDXX BuyIDEXX LABS INC$15,692,000
+30.1%
72,000
+14.3%
0.60%
+17.5%
FOLD  AMICUS THERAPEUTICS INC$15,620,000
+3.9%
1,000,0000.0%0.60%
-6.4%
BIIB  BIOGEN INC$15,383,000
+6.0%
53,0000.0%0.59%
-4.4%
RARE BuyULTRAGENYX PHARMACEUTICAL IN$15,374,000
+74.3%
200,000
+15.6%
0.59%
+57.4%
XENT  INTERSECT ENT INC$15,355,000
-4.7%
410,0000.0%0.59%
-14.0%
TBPH  THERAVANCE BIOPHARMA INC$14,801,000
-6.5%
652,6000.0%0.57%
-15.6%
GTHX BuyG1 THERAPEUTICS INC$13,038,000
+22.6%
300,000
+4.5%
0.50%
+10.6%
EXEL BuyEXELIXIS INC$12,804,000
+230.3%
595,000
+240.0%
0.49%
+198.8%
TBIO NewTRANSLATE BIO INC$12,790,0001,011,079
+100.0%
0.49%
BPMC BuyBLUEPRINT MEDICINES CORP$12,633,000
-12.7%
199,000
+26.1%
0.49%
-21.2%
AMRN  AMARIN CORP PLCspons adr new$12,360,000
+2.7%
4,000,0000.0%0.48%
-7.4%
PTLA  PORTOLA PHARMACEUTICALS INC$12,230,000
+15.7%
323,8000.0%0.47%
+4.4%
MRTX BuyMIRATI THERAPEUTICS INC$11,832,000
+103.9%
240,000
+27.0%
0.46%
+83.5%
IMMU BuyIMMUNOMEDICS INC$11,835,000
+80.0%
500,000
+11.1%
0.46%
+62.5%
BMRN  BIOMARIN PHARMACEUTICAL INC$11,775,000
+16.2%
125,0000.0%0.45%
+4.9%
CLVS BuyCLOVIS ONCOLOGY INC$11,595,000
-5.1%
255,000
+10.2%
0.45%
-14.4%
RIGL BuyRIGEL PHARMACEUTICALS INC$11,179,000
+22.6%
3,950,000
+53.4%
0.43%
+10.5%
RTRX  RETROPHIN INC$10,904,000
+21.9%
400,0000.0%0.42%
+9.9%
ARGX NewARGENX SEsponsored adr$10,668,000128,750
+100.0%
0.41%
ANAB BuyANAPTYSBIO INC$10,656,000
-24.2%
150,000
+11.1%
0.41%
-31.6%
CLSD  CLEARSIDE BIOMEDICAL INC$10,423,000
-0.4%
975,0000.0%0.40%
-10.1%
NVTA  INVITAE CORP$10,290,000
+56.7%
1,400,0000.0%0.40%
+41.4%
A BuyAGILENT TECHNOLOGIES INC$10,123,000
+65.4%
163,700
+78.9%
0.39%
+49.4%
ZGNX BuyZOGENIX INC$9,989,000
+10.6%
226,000
+0.2%
0.38%
-0.3%
CHRS SellCOHERUS BIOSCIENCES INC$9,660,000
+25.8%
690,000
-0.7%
0.37%
+13.4%
FIXX SellHOMOLOGY MEDICINES INC$9,588,000
-10.8%
470,000
-18.3%
0.37%
-19.6%
FPRX BuyFIVE PRIME THERAPEUTICS INC$9,375,000
-6.8%
593,000
+1.3%
0.36%
-15.9%
ARDX BuyARDELYX INC$9,345,000
-18.7%
2,525,557
+11.0%
0.36%
-26.5%
ECYT  ENDOCYTE INC$9,315,000
+51.8%
675,0000.0%0.36%
+36.6%
MNTA BuyMOMENTA PHARMACEUTICALS INC$9,254,000
+47.8%
452,500
+31.2%
0.36%
+33.3%
RTIX  RTI SURGICAL INC$8,970,0000.0%1,950,0000.0%0.34%
-9.9%
ADAP SellADAPTIMMUNE THERAPEUTICS PLCsponds adr$8,903,000
-9.4%
750,000
-14.3%
0.34%
-18.1%
ODT BuyODONATE THERAPEUTICS INC$8,782,000
+8.1%
397,750
+3.7%
0.34%
-2.6%
CO  GLOBAL CORD BLOOD CORPORATIO$8,351,000
-7.0%
880,0000.0%0.32%
-16.2%
APTX NewAPTINYX INC$8,218,000340,000
+100.0%
0.32%
CBAY BuyCYMABAY THERAPEUTICS INC$7,784,000
+22.3%
580,000
+18.4%
0.30%
+10.3%
SPRO  SPERO THERAPEUTICS INC$7,702,000
+3.0%
525,0000.0%0.30%
-7.2%
SAGE  SAGE THERAPEUTICS INC$7,670,000
-2.8%
49,0000.0%0.30%
-12.5%
RARX BuyRA PHARMACEUTICALS INC$7,463,000
+134.2%
750,000
+25.0%
0.29%
+111.0%
KURA BuyKURA ONCOLOGY INC$7,280,000
+1364.8%
400,000
+1409.4%
0.28%
+1233.3%
BLUE  BLUEBIRD BIO INC$7,063,000
-8.1%
45,0000.0%0.27%
-17.1%
ZLAB BuyZAI LAB LTDadr$6,975,000
+10.7%
300,000
+1.7%
0.27%
-0.4%
AGLE BuyAEGLEA BIOTHERAPEUTICS INC$6,877,000
+32.3%
650,000
+24.0%
0.26%
+19.4%
GBT  GLOBAL BLOOD THERAPEUTICS IN$6,780,000
-6.4%
150,0000.0%0.26%
-15.5%
MYOV  MYOVANT SCIENCES LTD$6,749,000
+7.5%
295,1000.0%0.26%
-3.0%
RYTM BuyRHYTHM PHARMACEUTICALS INC$6,721,000
+372.3%
215,000
+200.7%
0.26%
+324.6%
ACHN BuyACHILLION PHARMACEUTICALS IN$6,651,000
-20.3%
2,350,000
+4.4%
0.26%
-28.1%
LJPC BuyLA JOLLA PHARMACEUTICAL CO$6,484,000
-1.0%
222,300
+1.0%
0.25%
-10.4%
CRVS  CORVUS PHARMACEUTICALS INC$6,314,000
-4.8%
575,0000.0%0.24%
-14.1%
MGNX  MACROGENICS INC$5,679,000
-17.9%
275,0000.0%0.22%
-25.8%
BSX NewBOSTON SCIENTIFIC CORP$5,641,000172,500
+100.0%
0.22%
 INSMED INCnote 1.750% 1/1$5,531,000
+3.2%
6,000,0000.0%0.21%
-7.0%
DERM  DERMIRA INC$5,520,000
+15.1%
600,0000.0%0.21%
+3.4%
GTXI  GTX INC DEL$5,420,000
-13.7%
354,0000.0%0.21%
-22.0%
 ALDER BIOPHARMACEUTICALS INCnote 2.500% 2/0$5,207,000
+12.6%
5,000,0000.0%0.20%
+1.5%
 MEDICINES COnote 2.750% 7/1$5,052,000
+4.8%
5,000,0000.0%0.19%
-5.8%
EVHC NewENVISION HEALTHCARE CORP$4,854,000110,300
+100.0%
0.19%
ADVM  ADVERUM BIOTECHNOLOGIES INC$4,770,000
-8.6%
900,0000.0%0.18%
-17.5%
PRTK  PARATEK PHARMACEUTICALS INC$4,590,000
-21.5%
450,0000.0%0.18%
-29.2%
CMTA  CLEMENTIA PHARMACEUTICALS IN$4,540,000
-13.1%
345,0000.0%0.18%
-21.5%
CORV NewCORREVIO PHARMA CORP$4,536,0001,200,000
+100.0%
0.18%
NVAX BuyNOVAVAX INC$4,355,000
-24.6%
3,250,000
+18.2%
0.17%
-31.7%
DVAX BuyDYNAVAX TECHNOLOGIES CORP$4,087,000
-18.0%
268,000
+6.8%
0.16%
-26.3%
 MEDICINES COnote 2.500% 1/1$3,660,000
+5.7%
3,000,0000.0%0.14%
-4.7%
CGEN BuyCOMPUGEN LTDord$3,558,000
-3.1%
1,078,165
+30.7%
0.14%
-12.7%
SLDB SellSOLID BIOSCIENCES INC$3,385,000
+260.9%
95,000
-24.0%
0.13%
+225.0%
ITCI  INTRA CELLULAR THERAPIES INC$3,313,000
-16.1%
187,5000.0%0.13%
-24.4%
AGN  ALLERGAN PLC$2,945,000
-0.9%
17,6650.0%0.11%
-11.0%
 EGALET CORPnote 5.500% 4/0$2,841,000
-10.1%
7,800,0000.0%0.11%
-19.3%
MNLO  MENLO THERAPEUTICS INC$2,680,000
-78.4%
330,0000.0%0.10%
-80.5%
TORC  RESTORBIO INC$2,516,000
-4.5%
275,0000.0%0.10%
-13.4%
BuyNABRIVA THERAPEUTICS PLC$2,227,000
-29.2%
640,000
+2.4%
0.09%
-35.8%
MCRB  SERES THERAPEUTICS INC$1,892,000
+17.2%
220,0000.0%0.07%
+5.8%
CDTX  CIDARA THERAPEUTICS INC$1,560,000
+30.0%
300,0000.0%0.06%
+17.6%
KNSA NewKINIKSA PHARMACEUTICALS LTD$1,562,00090,000
+100.0%
0.06%
 THERAVANCE BIOPHARMA INCnote 3.250%11/0$1,491,000
-1.6%
1,500,0000.0%0.06%
-12.3%
NewNEUROCRINE BIOSCIENCES INCnote 2.250% 5/1$1,446,0001,000,000
+100.0%
0.06%
BCRX SellBIOCRYST PHARMACEUTICALS$1,433,000
-67.5%
250,000
-73.0%
0.06%
-70.7%
 RADIUS HEALTH INCnote 3.000% 9/0$1,399,000
-7.5%
1,500,0000.0%0.05%
-15.6%
SCYX  SCYNEXIS INC$1,345,000
+22.4%
820,0000.0%0.05%
+10.6%
PTI SellPROTEOSTASIS THERAPEUTICS IN$1,315,000
-59.0%
471,321
-30.2%
0.05%
-62.8%
PRTA SellPROTHENA CORP PLCcall$1,239,000
-75.0%
85,000
-37.0%
0.05%
-77.3%
 PACIRA PHARMACEUTICALS INCnote 2.375% 4/0$932,000
+2.2%
1,000,0000.0%0.04%
-7.7%
NewDERMIRA INCnote 3.000% 5/1$827,0001,000,000
+100.0%
0.03%
CHMA  CHIASMA INC$788,0000.0%525,0000.0%0.03%
-11.8%
MCK NewMCKESSON CORP$667,0005,000
+100.0%
0.03%
INFI ExitINFINITY PHARMACEUTICALS INC$0-270,000
-100.0%
-0.02%
ExitWRIGHT MED GROUP INCnote 2.000% 2/1$0-1,000,000
-100.0%
-0.04%
DBVT ExitDBV TECHNOLOGIES S Asponsored adr$0-73,000
-100.0%
-0.07%
CRME ExitCARDIOME PHARMA CORP$0-1,200,000
-100.0%
-0.12%
MRUS ExitMERUS N V$0-174,917
-100.0%
-0.14%
AIMT ExitAIMMUNE THERAPEUTICS INC$0-160,000
-100.0%
-0.22%
SHPG ExitSHIRE PLCsponsored adr$0-37,500
-100.0%
-0.24%
TXMD ExitTHERAPEUTICSMD INC$0-1,172,800
-100.0%
-0.24%
ZTS ExitZOETIS INCcl a$0-101,000
-100.0%
-0.36%
PRTA ExitPROTHENA CORP PLC$0-318,500
-100.0%
-0.50%
AVXS ExitAVEXIS INC$0-190,000
-100.0%
-1.00%
AET ExitAETNA INC NEW$0-239,000
-100.0%
-1.72%
BMY ExitBRISTOL MYERS SQUIBB CO$0-650,000
-100.0%
-1.75%
Original filings

The following EDGAR filing(s) were analyzed to create this report:

  • View 13F-HR filed 2018-08-14
Signatures

The EDGAR filing(s) were signed by:

Top long-term holdings
NameQuarters ownedLatest quarter ownedMax weighting
INTUITIVE SURGICAL INC40Q3 20233.4%
NEUROCRINE BIOSCIENCES INC39Q3 20234.8%
PACIRA PHARMACEUTICALS INC39Q3 20232.6%
ULTRAGENYX PHARMACEUTICAL IN39Q3 20231.9%
ACADIA HEALTHCARE COMPANY IN38Q3 20234.4%
ASCENDIS PHARMA A/S35Q3 20231.3%
INVITAE CORP35Q3 20231.8%
BIOMARIN PHARMACEUTICAL INC35Q3 20231.3%
MACROGENICS INC35Q3 20230.5%
COLLEGIUM PHARMACEUTICAL INC34Q3 20232.1%

View Rock Springs Capital Management LP's complete holdings history.

Latest significant ownerships (13-D/G)
Rock Springs Capital Management LP Q2 2018 significant holdings filed using form 13D/G when ownership exceeds 5% of a company's total stock issue.
FiledShares Percentage
Aeglea BioTherapeutics, Inc.February 14, 20233,413,9065.6%
Compass Therapeutics, Inc.February 14, 20235,333,1884.2%
Mirum Pharmaceuticals, Inc.February 14, 20231,795,7334.9%
PhaseBio Pharmaceuticals IncSold outFebruary 14, 202300.0%
Sierra Oncology, Inc.Sold outFebruary 14, 202300.0%
ARDELYX, INC.Sold outFebruary 15, 202200.0%
CHIASMA, INCSold outFebruary 15, 202200.0%
FIVE PRIME THERAPEUTICS, INC.Sold outFebruary 15, 202200.0%
F-star Therapeutics, Inc.February 15, 2022751,8893.6%
Protara Therapeutics, Inc.Sold outFebruary 15, 202200.0%

View Rock Springs Capital Management LP's complete significant-ownership history.

Latest filings
TypeFiled
SC 13G/A2024-04-05
13F-HR2024-02-14
SC 13G/A2024-02-14
SC 13G/A2024-02-14
SC 13G/A2024-02-14
SC 13G/A2024-02-14
SC 13G/A2024-02-14
SC 13G/A2024-02-14
SC 13G/A2024-02-14
SC 13G/A2024-02-14

View Rock Springs Capital Management LP's complete filings history.

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