Rock Springs Capital Management LP - Q4 2019 holdings

$3.16 Billion is the total value of Rock Springs Capital Management LP's 130 reported holdings in Q4 2019. The portfolio turnover from Q3 2019 to Q4 2019 was 23.2% .

 Value Shares↓ Weighting
UNH  UNITEDHEALTH GROUP INC$173,742,000
+35.3%
591,0000.0%5.49%
+7.2%
NBIX BuyNEUROCRINE BIOSCIENCES INC$137,372,000
+23.7%
1,278,000
+3.7%
4.34%
-1.9%
WCG  WELLCARE HEALTH PLANS INC$105,832,000
+27.4%
320,5000.0%3.34%
+1.0%
AMRN  AMARIN CORP PLCspons adr new$99,696,000
+41.4%
4,650,0000.0%3.15%
+12.1%
ISRG  INTUITIVE SURGICAL INC$90,150,000
+9.5%
152,5000.0%2.85%
-13.2%
JNJ BuyJOHNSON & JOHNSON$81,323,000
+1022.5%
557,500
+895.5%
2.57%
+788.9%
HCA  HCA HEALTHCARE INC$69,101,000
+22.7%
467,5000.0%2.18%
-2.7%
HUM NewHUMANA INC$67,806,000185,000
+100.0%
2.14%
EHC  ENCOMPASS HEALTH CORP$56,455,000
+9.5%
815,0000.0%1.78%
-13.2%
BSX BuyBOSTON SCIENTIFIC CORP$54,264,000
+37.5%
1,200,000
+23.7%
1.72%
+9.0%
PCRX  PACIRA BIOSCIENCES$52,095,000
+19.0%
1,150,0000.0%1.65%
-5.7%
EPZM BuyEPIZYME INC$50,430,000
+164.3%
2,050,000
+10.8%
1.59%
+109.6%
TFX  TELEFLEX INC$48,937,000
+10.8%
130,0000.0%1.55%
-12.2%
SRPT BuySAREPTA THERAPEUTICS INC$44,583,000
+75.4%
345,500
+2.4%
1.41%
+39.1%
PODD  INSULET CORP$44,598,000
+3.8%
260,5000.0%1.41%
-17.7%
VRTX  VERTEX PHARMACEUTICALS INC$44,447,000
+29.2%
203,0000.0%1.40%
+2.5%
BAX BuyBAXTER INTL INC$43,901,000
+30.4%
525,000
+36.4%
1.39%
+3.4%
EW  EDWARDS LIFESCIENCES CORP$42,809,000
+6.1%
183,5000.0%1.35%
-15.9%
IRTC BuyIRHYTHM TECHNOLOGIES INC$42,488,000
+3.3%
624,000
+12.4%
1.34%
-18.1%
ALNY BuyALNYLAM PHARMACEUTICALS INC$41,922,000
+57.7%
364,000
+10.1%
1.32%
+25.1%
PEN  PENUMBRA INC$39,835,000
+22.1%
242,5000.0%1.26%
-3.2%
ARGX BuyARGENX SEsponsored adr$39,729,000
+91.9%
247,500
+36.2%
1.26%
+52.1%
EXAS SellEXACT SCIENCES CORP$38,842,000
-0.4%
420,000
-2.7%
1.23%
-21.1%
MRTX BuyMIRATI THERAPEUTICS INC$38,658,000
+92.7%
300,000
+16.5%
1.22%
+52.8%
ARDX BuyARDELYX INC$36,399,000
+153.5%
4,850,000
+58.7%
1.15%
+101.0%
GLPG  GALAPAGOS NVspon adr$36,195,000
+35.5%
175,0000.0%1.14%
+7.4%
BGNE  BEIGENE LTDsponsored adr$35,605,000
+35.4%
214,8000.0%1.12%
+7.3%
RARX SellRA PHARMACEUTICALS INC$35,198,000
+78.2%
750,000
-10.2%
1.11%
+41.3%
CHRS BuyCOHERUS BIOSCIENCES INC$35,110,000
-7.8%
1,950,000
+3.7%
1.11%
-26.9%
APRE NewAPREA THERAPEUTICS INC$33,224,000723,991
+100.0%
1.05%
NVRO BuyNEVRO CORP$32,794,000
+57.3%
279,000
+15.1%
1.04%
+24.7%
COLL SellCOLLEGIUM PHARMACEUTICAL INC$32,414,000
+78.9%
1,575,000
-0.2%
1.02%
+41.8%
ACHC SellACADIA HEALTHCARE COMPANY IN$32,390,000
-19.2%
975,000
-24.4%
1.02%
-36.0%
IDXX  IDEXX LABS INC$31,388,000
-4.0%
120,2000.0%0.99%
-23.8%
ALGN  ALIGN TECHNOLOGY INC$30,946,000
+54.2%
110,9000.0%0.98%
+22.4%
ASMB BuyASSEMBLY BIOSCIENCES INC$30,690,000
+140.2%
1,500,000
+15.4%
0.97%
+90.6%
AGIO BuyAGIOS PHARMACEUTICALS INC$30,632,000
+168.2%
641,500
+82.0%
0.97%
+112.7%
BPMC BuyBLUEPRINT MEDICINES CORP$30,602,000
+24.9%
382,000
+14.5%
0.97%
-0.9%
MIRM BuyMIRUM PHARMACEUTICALS INC$30,527,000
+284.1%
1,245,000
+57.6%
0.96%
+204.4%
AXNX BuyAXONICS MODULATION TECH INC$30,481,000
+459.2%
1,100,000
+443.2%
0.96%
+343.8%
AMGN  AMGEN INC$30,375,000
+24.6%
126,0000.0%0.96%
-1.2%
RARE BuyULTRAGENYX PHARMACEUTICAL IN$29,897,000
+14.9%
700,000
+15.1%
0.94%
-8.8%
ASND  ASCENDIS PHARMA A Ssponsored adr$29,702,000
+44.4%
213,5000.0%0.94%
+14.5%
QURE BuyUNIQURE NV$28,664,000
+274.4%
400,000
+105.7%
0.91%
+197.0%
ACAD BuyACADIA PHARMACEUTICALS INC$28,663,000
+325.9%
670,000
+258.3%
0.91%
+238.1%
BMRN BuyBIOMARIN PHARMACEUTICAL INC$28,536,000
+197.1%
337,500
+136.8%
0.90%
+135.5%
SGEN  SEATTLE GENETICS INC$27,651,000
+33.8%
242,0000.0%0.87%
+6.1%
TMO  THERMO FISHER SCIENTIFIC INC$26,314,000
+11.5%
81,0000.0%0.83%
-11.6%
DCPH BuyDECIPHERA PHARMACEUTICALS IN$26,258,000
+209.5%
421,890
+68.8%
0.83%
+145.6%
MDCO SellMEDICINES CO$26,136,000
-34.7%
307,699
-61.5%
0.83%
-48.2%
ZLAB BuyZAI LAB LTDadr$25,994,000
+39.7%
625,000
+8.7%
0.82%
+10.8%
BOLD  AUDENTES THERAPEUTICS INC$24,534,000
+113.0%
410,0000.0%0.78%
+68.8%
WST  WEST PHARMACEUTICAL SVSC INC$22,925,000
+6.0%
152,5000.0%0.72%
-16.0%
MDGL SellMADRIGAL PHARMACEUTICALS INC$22,796,000
-2.9%
250,200
-8.1%
0.72%
-23.1%
ALLK SellALLAKOS INC$22,410,000
-1.7%
235,000
-19.0%
0.71%
-22.1%
ACHN SellACHILLION PHARMACEUTICALS IN$22,221,000
+61.4%
3,685,000
-3.7%
0.70%
+27.9%
INCY SellINCYTE CORP$21,830,000
-5.8%
250,000
-19.9%
0.69%
-25.3%
PTLA SellPORTOLA PHARMACEUTICALS INC$21,492,000
-23.7%
900,000
-14.3%
0.68%
-39.5%
IMMU BuyIMMUNOMEDICS INC$21,160,000
+78.3%
1,000,000
+11.7%
0.67%
+41.4%
GBT  GLOBAL BLOOD THERAPEUTICS IN$21,065,000
+63.8%
265,0000.0%0.67%
+30.1%
FRPT  FRESHPET INC$20,992,000
+18.7%
355,2500.0%0.66%
-6.0%
RDUS SellRADIUS HEALTH INC$20,164,000
-39.8%
1,000,200
-23.1%
0.64%
-52.2%
XENT SellINTERSECT ENT INC$19,920,000
+34.2%
800,000
-8.3%
0.63%
+6.4%
NVTA BuyINVITAE CORP$19,356,000
-10.7%
1,200,000
+6.7%
0.61%
-29.2%
INSM SellINSMED INC$19,104,000
+21.7%
800,000
-10.1%
0.60%
-3.5%
FTSV NewFORTY SEVEN INC$17,717,000450,000
+100.0%
0.56%
TBPH BuyTHERAVANCE BIOPHARMA INC$16,963,000
+58.3%
655,200
+19.1%
0.54%
+25.5%
ADPT  ADAPTIVE BIOTECHNOLOGIES COR$16,306,000
-3.2%
545,0000.0%0.52%
-23.2%
CI SellCIGNA CORP NEW$15,337,000
-53.4%
75,000
-65.4%
0.48%
-63.0%
HQY NewHEALTHEQUITY INC$15,184,000205,000
+100.0%
0.48%
OSW NewONESPAWORLD HOLDINGS LIMITED$15,156,000900,000
+100.0%
0.48%
PHR BuyPHREESIA INC$15,052,000
+72.0%
565,000
+56.5%
0.48%
+36.4%
GH  GUARDANT HEALTH INC$14,847,000
+22.4%
190,0000.0%0.47%
-2.9%
NVCR  NOVOCURE LTD$14,537,000
+12.7%
172,5000.0%0.46%
-10.7%
CNC  CENTENE CORP DEL$14,448,000
+45.3%
229,8000.0%0.46%
+15.2%
ODT  ODONATE THERAPEUTICS INC$13,954,000
+24.7%
430,0000.0%0.44%
-1.1%
KRTX SellKARUNA THERAPEUTICS INC$13,561,000
+130.6%
180,000
-50.1%
0.43%
+82.9%
FGEN  FIBROGEN INC$13,124,000
+16.0%
306,0000.0%0.42%
-8.0%
ZGNX  ZOGENIX INC$13,033,000
+30.2%
250,0000.0%0.41%
+3.3%
RIGL BuyRIGEL PHARMACEUTICALS INC$11,766,000
+49.8%
5,497,900
+30.9%
0.37%
+18.8%
MYOK NewMYOKARDIA INC$11,662,000160,000
+100.0%
0.37%
CNST NewCONSTELLATION PHARMCETICLS I$11,000,000233,500
+100.0%
0.35%
BHVN SellBIOHAVEN PHARMACTL HLDG CO L$10,888,000
-24.0%
200,000
-41.8%
0.34%
-39.8%
ARVN BuyARVINAS INC$10,273,000
+217.8%
250,000
+66.7%
0.32%
+151.9%
DERM SellDERMIRA INC$9,854,000
+99.0%
650,000
-16.1%
0.31%
+57.9%
FOLD  AMICUS THERAPEUTICS INC$9,740,000
+21.4%
1,000,0000.0%0.31%
-3.8%
BMY NewBRISTOL MYERS SQUIBB CO$9,629,000150,000
+100.0%
0.30%
DVAX SellDYNAVAX TECHNOLOGIES CORP$9,009,000
+36.2%
1,575,000
-14.9%
0.28%
+8.0%
FIXX  HOMOLOGY MEDICINES INC$8,798,000
+14.4%
425,0000.0%0.28%
-9.4%
 MEDICINES COnote 2.750% 7/1$8,735,000
+44.4%
5,000,0000.0%0.28%
+14.5%
RTRX SellRETROPHIN INC$8,165,000
-25.8%
575,000
-39.5%
0.26%
-41.2%
RYTM BuyRHYTHM PHARMACEUTICALS INC$7,921,000
+20.3%
345,000
+13.1%
0.25%
-4.6%
MNTA  MOMENTA PHARMACEUTICALS INC$7,892,000
+52.2%
400,0000.0%0.25%
+20.3%
MYOV BuyMYOVANT SCIENCES LTD$7,760,000
+231.6%
500,000
+11.1%
0.24%
+163.4%
TBIO SellTRANSLATE BIO INC$7,733,000
-23.9%
950,000
-7.3%
0.24%
-39.8%
MRSN SellMERSANA THERAPEUTICS INC$7,065,000
+219.4%
1,233,000
-11.9%
0.22%
+153.4%
PHAS SellPHASEBIO PHARMACEUTICALS INC$6,874,000
+16.4%
1,125,000
-20.6%
0.22%
-7.7%
ICPT  INTERCEPT PHARMACEUTICALS IN$6,741,000
+86.7%
54,4000.0%0.21%
+47.9%
GRTX NewGALERA THERAPEUTICS INC$6,580,000500,000
+100.0%
0.21%
CGEN  COMPUGEN LTDord$6,556,000
+40.9%
1,100,0000.0%0.21%
+11.9%
NGM  NGM BIOPHARMACEUTICALS INC$6,492,000
+33.5%
351,1000.0%0.20%
+5.7%
AGLE  AEGLEA BIOTHERAPEUTICS INC$6,112,000
-0.7%
800,0000.0%0.19%
-21.2%
 INSMED INCnote 1.750% 1/1$5,795,000
+15.2%
6,000,0000.0%0.18%
-8.5%
CHMA BuyCHIASMA INC$5,754,000
+29.2%
1,160,000
+28.9%
0.18%
+2.2%
HCAT BuyHEALTH CATALYST INC$5,552,000
+40.4%
160,000
+28.0%
0.18%
+10.8%
TXG Buy10X GENOMICS INC$5,528,000
+72.8%
72,500
+14.2%
0.18%
+36.7%
RTIX  RTI SURGICAL HOLDINGS INC$5,343,000
-3.9%
1,950,0000.0%0.17%
-23.5%
SPRO  SPERO THERAPEUTICS INC$5,048,000
-9.3%
525,0000.0%0.16%
-28.4%
AKRO  AKERO THERAPEUTICS INC$4,994,000
-2.4%
225,0000.0%0.16%
-22.5%
CO  GLOBAL CORD BLOOD CORPORATIO$4,625,000
+3.3%
925,0000.0%0.15%
-18.0%
GMDA  GAMIDA CELL LTD$4,300,000
-0.7%
1,000,0000.0%0.14%
-21.4%
BLUE SellBLUEBIRD BIO INC$3,071,000
-28.8%
35,000
-25.5%
0.10%
-43.6%
ACRS SellACLARIS THERAPEUTICS INC$3,024,000
-5.9%
1,600,000
-46.2%
0.10%
-25.0%
OBSV SellOBSEVA SA$3,016,000
-73.4%
789,480
-42.0%
0.10%
-78.9%
SellNABRIVA THERAPEUTICS PLC$2,772,000
-39.7%
2,100,000
-8.7%
0.09%
-51.9%
MGNX SellMACROGENICS INC$2,502,000
-34.6%
230,000
-23.3%
0.08%
-48.4%
ANAB SellANAPTYSBIO INC$2,194,000
-73.9%
135,000
-43.8%
0.07%
-79.4%
FPRX SellFIVE PRIME THERAPEUTICS INC$1,836,000
-38.9%
400,000
-48.4%
0.06%
-51.7%
 THERAVANCE BIOPHARMA INCnote 3.250%11/0$1,557,000
+13.2%
1,500,0000.0%0.05%
-10.9%
 NEUROCRINE BIOSCIENCES INCnote 2.250% 5/1$1,536,000
+12.0%
1,000,0000.0%0.05%
-10.9%
PRTK SellPARATEK PHARMACEUTICALS INC$1,511,000
-22.3%
375,000
-16.7%
0.05%
-37.7%
 RADIUS HEALTH INCnote 3.000% 9/0$1,274,000
-6.8%
1,500,0000.0%0.04%
-25.9%
 PACIRA BIOSCIENCESnote 2.375% 4/0$1,042,000
+5.5%
1,000,0000.0%0.03%
-15.4%
ADAP SellADAPTIMMUNE THERAPEUTICS PLCsponds adr$960,000
-27.3%
800,000
-8.6%
0.03%
-43.4%
 DERMIRA INCnote 3.000% 5/1$925,000
+9.6%
1,000,0000.0%0.03%
-14.7%
CRVS SellCORVUS PHARMACEUTICALS INC$816,000
-32.2%
150,000
-62.5%
0.03%
-45.8%
BMYRT NewBRISTOL MYERS SQUIBB COright 99/99/9999$557,000185,150
+100.0%
0.02%
APLT NewAPPLIED THERAPEUTICS INC$554,00020,315
+100.0%
0.02%
PFE NewPFIZER INC$407,00010,400
+100.0%
0.01%
CVET  COVETRUS INC$273,000
+11.0%
20,6830.0%0.01%
-10.0%
PTI ExitPROTEOSTASIS THERAPEUTICS IN$0-400,000
-100.0%
-0.01%
KLDO ExitKALEIDO BIOSCIENCES INC$0-100,050
-100.0%
-0.03%
NVAX ExitNOVAVAX INC$0-162,500
-100.0%
-0.03%
CLVS ExitCLOVIS ONCOLOGY INC$0-256,000
-100.0%
-0.04%
CORV ExitCORREVIO PHARMA CORP$0-1,200,000
-100.0%
-0.10%
TORC ExitRESTORBIO INC$0-400,000
-100.0%
-0.14%
LJPC ExitLA JOLLA PHARMACEUTICAL CO$0-425,000
-100.0%
-0.15%
ExitMEDICINES COnote 2.500% 1/1$0-3,000,000
-100.0%
-0.18%
CBAY ExitCYMABAY THERAPEUTICS INC$0-900,000
-100.0%
-0.18%
PBYI ExitPUMA BIOTECHNOLOGY INC$0-587,400
-100.0%
-0.25%
ANTM ExitANTHEM INC$0-27,000
-100.0%
-0.26%
ABT ExitABBOTT LABS$0-122,500
-100.0%
-0.41%
GWPH ExitGW PHARMACEUTICALS PLCads$0-95,000
-100.0%
-0.44%
SAGE ExitSAGE THERAPEUTICS INC$0-92,500
-100.0%
-0.52%
CELG ExitCELGENE CORP$0-185,150
-100.0%
-0.73%
MOH ExitMOLINA HEALTHCARE INC$0-214,500
-100.0%
-0.94%
ALDR ExitALDER BIOPHARMACEUTICALS INC$0-1,300,000
-100.0%
-0.98%
SYK ExitSTRYKER CORP$0-179,000
-100.0%
-1.54%
ABBV ExitABBVIE INC$0-525,000
-100.0%
-1.58%
ONCE ExitSPARK THERAPEUTICS INC$0-505,371
-100.0%
-1.95%
Original filings

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

  • View 13F-HR filed 2020-02-14
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 Q4 2019 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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