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Disclosery

Tamarack Capital Management, LLC

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13F filer, CIK 1537996, CARLSBAD, CA

Tamarack Capital Management, LLC reported $659,287,000 across 39 holdings for the quarter ended 2014-12-31, in a 13F-HR filed 2015-02-11. Its ten largest share positions make up 61.47% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001095449-15-000029

Period
2014-12-31
Reported value
$659M
Holdings
39
Top 10 weight
61.47%
New
12
Sold out
3

Largest buys vs the previous quarter

SecurityShares changeApprox. value
DGXnew+580,000$38.9M
BDXadded+125,000$17.4M
MDRXnew+1,250,000$16M
INGNadded+413,383$13M
DXCMadded+235,000$12.9M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
CAREFUSION CORPreduced-421,500-$25M
AUXILIUM PHARMACEUTICALSexited-650,000-$19.4M
MDXGreduced-1,350,000-$15.6M
ALKSreduced-150,000-$8.78M
CUBIST PHARMACEUTICALS INCexited-110,000-$7.3M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2014

Share positions as resolved from 13F-HR 0001095449-15-000029, largest first. % of portfolio is the value over $469,548,000, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
ENDOLOGIX INCENDOLOGIX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 1,425,000 shares; 2014Q2: 2,375,000 shares; 2014Q3: 3,300,000 shares; 2014Q4: 3,960,000 shares 3,960,000$60.5M12.89%+660,000
DGXQUEST DIAGNOSTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: not reported; 2014Q4: 580,000 shares 580,000$38.9M8.28%newTimeline
SPECTRANETICS CORPSPECTRANETICS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 525,000 shares; 2014Q2: 1,150,000 shares; 2014Q3: 1,150,000 shares; 2014Q4: 1,025,000 shares 1,025,000$35.4M7.55%-125,000
GREATBATCH INCGREATBATCH INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 350,000 shares; 2014Q2: 369,900 shares; 2014Q3: 474,730 shares; 2014Q4: 519,000 shares 519,000$25.6M5.45%+44,270
MEDTRONIC INCMEDTRONIC INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: 370,000 shares; 2014Q4: 325,000 shares 325,000$23.5M5%-45,000
BDXBECTON DICKINSON & COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: 40,000 shares; 2014Q4: 165,000 shares 165,000$23M4.89%+125,000Timeline
TEVATEVA PHARMACEUTICAL INDS LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: 246,500 shares; 2014Q3: 230,000 shares; 2014Q4: 385,000 shares 385,000$22.1M4.72%+155,000Timeline
INGNINOGEN INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: 260,617 shares; 2014Q4: 674,000 shares 674,000$21.1M4.5%+413,383Timeline
NXSTAGE MEDICAL INCNXSTAGE MEDICAL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 1,200,000 shares; 2014Q2: 1,050,000 shares; 2014Q3: 1,100,000 shares; 2014Q4: 1,100,000 shares 1,100,000$19.7M4.2%0
DXCMDEXCOM INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: 105,000 shares; 2014Q4: 340,000 shares 340,000$18.7M3.99%+235,000Timeline
ALKSALKERMES PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 475,000 shares; 2014Q2: 525,000 shares; 2014Q3: 450,000 shares; 2014Q4: 300,000 shares 300,000$17.6M3.74%-150,000Timeline
MDRXVERADIGM INC. COMMON STOCK(DE)Quarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: not reported; 2014Q4: 1,250,000 shares 1,250,000$16M3.4%newTimeline
PATTERSON COS INCPATTERSON COS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: 225,000 shares; 2014Q3: 370,000 shares; 2014Q4: 300,000 shares 300,000$14.4M3.07%-70,000
ATRCATRICURE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 422,292 shares; 2014Q2: 586,555 shares; 2014Q3: 700,000 shares; 2014Q4: 685,000 shares 685,000$13.7M2.91%-15,000Timeline
BIOBIO RAD LABS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: 16,369 shares; 2014Q3: 83,378 shares; 2014Q4: 105,000 shares 105,000$12.7M2.7%+21,622Timeline
PRGOPERRIGO CO PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: not reported; 2014Q4: 70,000 shares 70,000$11.7M2.49%newTimeline
RTI BIOLOGICS INCRTI BIOLOGICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 2,000,000 shares; 2014Q2: 2,150,000 shares; 2014Q3: 2,200,000 shares; 2014Q4: 2,017,241 shares 2,017,241$10.5M2.23%-182,759
CATAMARAN CORPCATAMARAN CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 325,000 shares; 2014Q2: 300,000 shares; 2014Q3: not reported; 2014Q4: 200,000 shares 200,000$10.3M2.2%new
MYGNMYRIAD GENETICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: not reported; 2014Q4: 300,000 shares 300,000$10.2M2.18%newTimeline
HANGER INCHANGER INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: 200,000 shares; 2014Q4: 454,501 shares 454,501$9.95M2.12%+254,501
LUMINEX CORPLUMINEX CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 300,000 shares; 2014Q2: 500,000 shares; 2014Q3: 550,000 shares; 2014Q4: 500,000 shares 500,000$9.38M2%-50,000
NATUS MEDICAL INCNATUS MEDICAL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: 153,533 shares; 2014Q3: 274,695 shares; 2014Q4: 223,236 shares 223,236$8.04M1.71%-51,459
MDXGMIMEDX GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 1,800,000 shares; 2014Q2: 1,775,000 shares; 2014Q3: 2,000,000 shares; 2014Q4: 650,000 shares 650,000$7.5M1.6%-1,350,000Timeline
STREAMLINE HEALTH SOLUTIONSSTREAMLINE HEALTH SOLUTIONSQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 875,000 shares; 2014Q2: 1,025,000 shares; 2014Q3: 1,138,000 shares; 2014Q4: 1,138,000 shares 1,138,000$4.93M1.05%0
IMPRIVATA INCIMPRIVATA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: 195,553 shares; 2014Q3: 300,000 shares; 2014Q4: 377,924 shares 377,924$4.91M1.05%+77,924
CAREFUSION CORPCAREFUSION CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 700,000 shares; 2014Q2: 875,000 shares; 2014Q3: 500,000 shares; 2014Q4: 78,500 shares 78,500$4.66M0.99%-421,500
CORIUM INTL INCCORIUM INTL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: 627,670 shares; 2014Q3: 667,579 shares; 2014Q4: 750,100 shares 750,100$4.58M0.97%+82,521
TECHBIO-TECHNE CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: not reported; 2014Q4: 40,000 shares 40,000$3.7M0.79%newTimeline
TRINITY BIOTECH PLCTRINITY BIOTECH PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: not reported; 2014Q4: 125,000 shares 125,000$2.19M0.47%new
DISCOVERY LABORATORIES INC NDISCOVERY LABORATORIES INC NQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: 1,000,000 shares; 2014Q2: 1,500,000 shares; 2014Q3: 1,500,000 shares; 2014Q4: 1,500,000 shares 1,500,000$1.74M0.37%0
ICUIICU MED INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: 80,125 shares; 2014Q4: 13,875 shares 13,875$1.14M0.24%-66,250Timeline
LABSTANDARD BIOTOOLS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: not reported; 2014Q4: 24,442 shares 24,442$824K0.18%newTimeline
INTERSECT ENT INCINTERSECT ENT INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2013Q1: restricted; 2013Q2: restricted; 2013Q3: restricted; 2013Q4: restricted; 2014Q1: not reported; 2014Q2: not reported; 2014Q3: not reported; 2014Q4: 18,149 shares 18,149$337K0.07%new

Options

Puts and calls, as filed. The amount and value describe the underlying shares, not the option premium, so they stay out of % of portfolio (H5).

SecurityTypeAmountValueChange
SPYSTATE STR SPDR S&P 500 ETF T SHSput600,000$123M+100,000
IWMISHARES TR SHScall250,000$29.9Mnew
PFEPFIZER INC COMcall450,000$14M+50,000
PMPHILIP MORRIS INTL INC COMput150,000$12.2M0
MDXGMIMEDX GROUP INC COMcall575,300$6.63Mnew
BSXBOSTON SCIENTIFIC CORP COMput275,000$3.64Mnew

Sold out in Q4 2014

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
AUXILIUM PHARMACEUTICALSAUXILIUM PHARMACEUTICALS650,000$19.4Mshares
CUBIST PHARMACEUTICALS INCCUBIST PHARMACEUTICALS INC110,000$7.3Mshares
VOLCANO CORPORATIONVOLCANO CORPORATION500,000$5.32Mshares

How Q4 2014 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001095449-15-000029 base2015-02-11acceptance time not in the bulk data set