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13F-HR filed by WESTFIELD CAPITAL MANAGEMENT CO LP

WESTFIELD CAPITAL MANAGEMENT CO LP filed this 13F-HR for the quarter ended 2019-03-31, filed 2019-05-14, with 246 holding rows worth $13,140,869,000.

Accession
0001085146-19-001505
Filed
2019-05-14
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q1 2019

A holdings report, 246 entries on the cover page, a total value of $13,140,869,000 stated on the cover page (in dollars after the unit check, H1), rows summing to $13,140,869,000 with VALUE read as thousands by filing date, 13F file number 028-10220. 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
Apple Inc037833100COM1,922,722$365,221,000thousands by filing date
Amazon.com, Inc023135106COM197,074$350,940,000thousands by filing date
Microsoft Corp594918104COM2,139,797$252,368,000thousands by filing date
Visa Inc92826C839COM1,487,673$232,360,000thousands by filing date
Boeing Company097023105COM575,535$219,521,000thousands by filing date
ServiceNow,Inc.81762P102COM879,244$216,725,000thousands by filing date
Alphabet Inc. Reg. Shares C02079K107COM182,241$213,825,000thousands by filing date
UnitedHealth Group Inc91324P102COM794,857$196,536,000thousands by filing date
Home Depot, Inc437076102COM1,010,900$193,982,000thousands by filing date
Salesforce.com, Inc79466L302COM1,210,925$191,774,000thousands by filing date
METTLER TOLEDO INTERNATIONAL COM592688105Stock257,237$185,982,000thousands by filing date
MARATHON PETE CORP COM56585A102Stock2,973,677$177,975,000thousands by filing date
AMETEK INC COM031100100Stock2,095,323$173,849,000thousands by filing date
Alphabet Inc. Reg. Shares A02079K305COM145,370$171,084,000thousands by filing date
Bristol-Myers Squibb Company110122108COM3,278,241$156,405,000thousands by filing date
TELEDYNE TECHNOLOGIES INC COM879360105Stock656,538$155,606,000thousands by filing date
INGERSOLL-RAND PLCG47791101SHS1,409,211$152,124,000thousands by filing date
THE COOPER COMPANIES216648402COM NEW511,047$151,357,000thousands by filing date
MEDICINES CO584688105COM5,290,481$147,869,000thousands by filing date
Netflix, Inc64110L106COM398,084$141,941,000thousands by filing date
TRANSDIGM GROUP INC COM893641100Stock299,044$135,763,000thousands by filing date
Vertex Pharmaceuticals Incorporated92532F100COM682,226$125,495,000thousands by filing date
MARRIOTT INTL INC NEW CL A571903202Stock1,000,070$125,099,000thousands by filing date
Thermo Fisher Scientific Inc.883556102COM456,640$124,992,000thousands by filing date
MasterCard, Inc57636Q104COM506,625$119,285,000thousands by filing date
Union Pacific Corporation907818108COM710,087$118,727,000thousands by filing date
WORLDPAY INC981558109CL A1,044,667$118,570,000thousands by filing date
Adobe Inc00724F101COM444,365$118,419,000thousands by filing date
STERIS PLC SHS USDG8473T100Stock923,205$118,198,000thousands by filing date
BIO RAD LABS INC090572207CL A376,471$115,080,000thousands by filing date
S&P Global,Inc.78409V104COM544,811$114,710,000thousands by filing date
AVERY DENNISON CORP COM053611109Stock1,008,453$113,955,000thousands by filing date
LENNOX INTL INC COM526107107Stock426,451$112,754,000thousands by filing date
CHARTER COMMUNICATIONS INC N16119P108COM317,023$109,978,000thousands by filing date
ULTA BEAUTY INC COM90384S303Stock307,397$107,199,000thousands by filing date
PAYPALHLDGSINC70450Y103STOK1,029,499$106,903,000thousands by filing date
McDonalds Corporation580135101COM561,167$106,566,000thousands by filing date
Progressive Corporation743315103COM1,432,011$103,234,000thousands by filing date
GALLAGHER ARTHUR J & CO COM363576109Stock1,306,977$102,075,000thousands by filing date
ILLINOIS TOOL WKS INC452308109COM703,381$100,956,000thousands by filing date
T-Mobile US,Inc.872590104COM1,442,803$99,698,000thousands by filing date
ZENDESK INC98936J101COM1,148,789$97,647,000thousands by filing date
TOTAL SYS SVCS INC891906109COM998,108$94,830,000thousands by filing date
FORTINET INC COM34959E109Stock1,118,818$93,947,000thousands by filing date
ICON PUB LTD CO SHSG4705A100Stock682,325$93,192,000thousands by filing date
META PLATFORMS INC CL A30303M102COM545,590$90,944,000thousands by filing date
Walt Disney Co254687106COM818,100$90,834,000thousands by filing date
FLEETCOR TECHNOLOGIES INC339041105COM364,463$89,873,000thousands by filing date
CONAGRA FOODS INC205887102COM3,239,408$89,861,000thousands by filing date
Applied Materials,Inc.038222105COM2,254,251$89,404,000thousands by filing date
Broadcom Inc.11135F101COM295,411$88,833,000thousands by filing date
NIKE,Inc. Class B654106103COM1,049,198$88,353,000thousands by filing date
Caterpillar Inc.149123101COM642,805$87,094,000thousands by filing date
HUNT J B TRANS SVCS INC COM445658107Stock812,178$82,266,000thousands by filing date
Bank of America Corp060505104COM2,965,611$81,821,000thousands by filing date
MADISON SQUARE GRDN SPRT CORP CL A55825T103Stock278,729$81,704,000thousands by filing date
EOG RES INC COM26875P101Stock857,636$81,630,000thousands by filing date
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR686,545$80,806,000thousands by filing date
PIONEER NATURAL RESOURCES CO723787107COM496,846$75,660,000thousands by filing date
TRANSUNION COM89400J107Stock1,131,930$75,658,000thousands by filing date
BLACK KNIGHT INC COM09215C105Stock1,352,308$73,701,000thousands by filing date
IHS MARKIT LTDG47567105SHS1,345,644$73,176,000thousands by filing date
International Business Machines Corporation459200101COM516,761$72,915,000thousands by filing date
SPLUNK INC848637104COM580,762$72,363,000thousands by filing date
NICE LTD SPONSORED ADR653656108ADR590,567$72,350,000thousands by filing date
ALEXANDRIA REAL ESTATE EQ INC COM015271109REIT479,622$68,375,000thousands by filing date
SBA COMMUNICATIONS CORP CL A78410G104REIT340,849$68,054,000thousands by filing date
HILTON WORLDWIDE HLDGS INC COM43300A203Stock806,422$67,022,000thousands by filing date
MSCI INC COM55354G100Stock324,000$64,424,000thousands by filing date
ACCELERON PHARMA INC00434H108COM1,377,123$64,133,000thousands by filing date
HAEMONETICS CORP MASS COM405024100Stock728,979$63,771,000thousands by filing date
ESSENT GROUP LTD COMG3198U102Stock1,465,102$63,659,000thousands by filing date
THE ULTIMATE SOFTWARE GROUP IN90385D107COM180,374$59,547,000thousands by filing date
FIDELITY NATL INFORMATION SVCS COM31620M106Stock520,734$58,895,000thousands by filing date
PROOFPOINT INC743424103COM484,757$58,864,000thousands by filing date
PALO ALTO NETWORKS INC697435105COM235,429$57,181,000thousands by filing date
Analog Devices,Inc.032654105COM535,239$56,345,000thousands by filing date
BIOGEN INC COM09062X103Stock237,250$56,081,000thousands by filing date
IDEXX LABS INC COM45168D104Stock244,320$54,630,000thousands by filing date
WPX ENERGY INC98212B103COM4,130,310$54,148,000thousands by filing date
MARVELL TECHNOLOGY GROUP LTDG5876H105ORD2,644,464$52,598,000thousands by filing date
FLOWSERVE CORP34354P105COM1,154,212$52,101,000thousands by filing date
TRACTOR SUPPLY CO COM892356106Stock519,319$50,769,000thousands by filing date
AUTODESK INC COM052769106Stock324,626$50,583,000thousands by filing date
SS&C TECH HLDGS COM78467J100Stock781,881$49,798,000thousands by filing date
FIVE BELOW INC COM33829M101Stock399,178$49,598,000thousands by filing date
PBF ENERGY INC69318G106CL A1,584,192$49,332,000thousands by filing date
GODADDY INC CL A380237107Stock655,419$49,281,000thousands by filing date
ELDORADO RESORTS INC28470R102COM1,054,364$49,228,000thousands by filing date
LPL FINL HLDGS INC COM50212V100Stock702,275$48,913,000thousands by filing date
SIX FLAGS ENTERTAINMENT CORP83001A102COM990,053$48,859,000thousands by filing date
REALPAGE INC75606N109COM798,574$48,465,000thousands by filing date
LULULEMON ATHLETICA INC550021109COM294,207$48,212,000thousands by filing date
RAYMOND JAMES FINL INC COM754730109Stock599,371$48,195,000thousands by filing date
QUEST DIAGNOSTICS INC COM74834L100Stock499,656$44,929,000thousands by filing date
SUMMIT MATERIALS INC CLASS A86614U100CL A2,824,928$44,832,000thousands by filing date
ARISTA NETWORKS INC040413106COM141,973$44,645,000thousands by filing date
HEICO CORP NEW422806208CL A519,638$43,681,000thousands by filing date
GUIDEWIRE SOFTWARE INC COM40171V100Stock440,106$42,761,000thousands by filing date
QTS RLTY TR INC74736A103COM CL A946,345$42,576,000thousands by filing date
LAM RESEARCH CORP512807108COM235,800$42,211,000thousands by filing date
ADVANCE AUTO PARTS INC00751Y106COM245,722$41,903,000thousands by filing date
KEMPER CORP COM488401100Stock533,862$40,648,000thousands by filing date
COSTAR GROUP INC COM22160N109Stock86,459$40,326,000thousands by filing date
FISERV INC337738108COM451,001$39,814,000thousands by filing date
INTERXION HOLDING N.VN47279109SHS584,681$39,016,000thousands by filing date
BERRY GLOBAL GROUP INC08579W103COM723,431$38,971,000thousands by filing date
INTEGRA LIFESCIENCES HLDGS C457985208COM NEW697,191$38,847,000thousands by filing date
V F CORP COM918204108Stock446,824$38,833,000thousands by filing date
NETAPP INC COM64110D104Stock553,259$38,363,000thousands by filing date
ON SEMICONDUCTOR CORP COM682189105Stock1,860,995$38,281,000thousands by filing date
GLOBAL PMTS INC37940X102COM278,230$37,984,000thousands by filing date
CRANE CO224399105COM448,636$37,964,000thousands by filing date
EVERPURE INC CL A74624M102Stock1,731,396$37,727,000thousands by filing date
FAIR ISAAC CORP COM303250104Stock138,540$37,632,000thousands by filing date
GRACE W R & CO DEL NEW COM38388F108Stock480,666$37,511,000thousands by filing date
BLUEPRINT MEDICINES CORP09627Y109COM467,041$37,387,000thousands by filing date
MICROCHIP TECHNOLOGY INC. COM595017104Stock444,716$36,894,000thousands by filing date
WESTERN ALLIANCE BANCORP COM957638109Stock892,396$36,624,000thousands by filing date
TABLEAU SOFTWARE INC87336U105CL A283,827$36,126,000thousands by filing date
TIFFANY & CO NEW886547108COM340,638$35,954,000thousands by filing date
TOPBUILD COR COM89055F103Stock542,580$35,170,000thousands by filing date
ROCKWELL AUTOMATION INC COM773903109Stock199,428$34,992,000thousands by filing date
SUN CMNTYS INC COM866674104REIT295,125$34,978,000thousands by filing date
RUSH ENTERPRISES INC CL A781846209Stock836,056$34,956,000thousands by filing date
SAREPTA THERAPEUTICS INC803607100COM291,487$34,742,000thousands by filing date
EAST WEST BANCORP INC COM27579R104Stock708,453$33,984,000thousands by filing date
BLOCK INC CL A852234103Stock451,020$33,790,000thousands by filing date
CHARLES RIV LABS INTL INC159864107COM231,142$33,573,000thousands by filing date
DIAMONDBACK ENERGY INC COM25278X109Stock330,082$33,513,000thousands by filing date
RYDER SYS INC COM783549108Stock531,993$32,978,000thousands by filing date
TWILIO INC CL A90138F102Stock254,986$32,939,000thousands by filing date
SKYWORKS SOLUTIONS INC COM83088M102Stock396,790$32,727,000thousands by filing date
RPM INTL INC COM749685103Stock556,371$32,292,000thousands by filing date
NEWMARK GROUP INC65158N102CL A3,836,182$31,994,000thousands by filing date
INGEVITY CORP COM45688C107Stock299,354$31,615,000thousands by filing date
BURLINGTON STORES INC COM122017106Stock196,570$30,799,000thousands by filing date
MSA SAFETY INC COM553498106Stock296,985$30,708,000thousands by filing date
NEXSTAR MEDIA GROUP INC COMMON STOCK65336K103Stock282,482$30,613,000thousands by filing date
ALNYLAM PHARMACEUTICALS INC COM02043Q107Stock319,923$29,897,000thousands by filing date
WOLVERINE WORLD WIDE INC978097103COM832,800$29,756,000thousands by filing date
PULTE GROUP INC COM745867101Stock1,047,575$29,290,000thousands by filing date
SVB FINANCIAL GROUP78486Q101COM127,673$28,389,000thousands by filing date
ENVESTNET INC29404K106COM427,230$27,937,000thousands by filing date
NEUROCRINE BIOSCIENCES INC64125C109COM316,540$27,887,000thousands by filing date
GARTNERINC366651107STOK179,705$27,258,000thousands by filing date
LUMENTUM HLDGS INC COM55024U109Stock480,830$27,186,000thousands by filing date
MASIMO CORP COM574795100Stock195,947$27,096,000thousands by filing date
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock213,113$27,089,000thousands by filing date
LINCOLN ELEC HLDGS INC533900106COM320,998$26,922,000thousands by filing date
ENTEGRIS INC COM29362U104Stock748,790$26,724,000thousands by filing date
WEX INC96208T104COM138,176$26,528,000thousands by filing date
TREX CO INC89531P105COM425,860$26,199,000thousands by filing date
AVNET INC COM053807103Stock601,420$26,084,000thousands by filing date
AMERICAN EAGLE OUTFITTERS INC COM02553E106Stock1,161,275$25,745,000thousands by filing date
8X8 INC282914100COMMON STOCK1,271,710$25,689,000thousands by filing date
IRONWOOD PHARMACEUTICALS INC46333X108COMMON STOCK1,881,874$25,462,000thousands by filing date
NUANCE COMMUNICATIONS INC67020Y100COM1,473,775$24,951,000thousands by filing date
STRATEGIC ED INC COM86272C103Stock185,939$24,416,000thousands by filing date
NEW RELIC INC64829B100COMMON STOCK239,969$23,685,000thousands by filing date
VIAVI SOLUTIONS INC925550105COM1,901,469$23,540,000thousands by filing date
AGIOS PHARMACEUTICALS INC00847X104COM342,680$23,110,000thousands by filing date
WNS HOLDINGS LTD92932M101SPON ADR425,480$22,665,000thousands by filing date
PERFORMANCE FOOD GROUP CO COM71377A103Stock565,405$22,413,000thousands by filing date
ACACIA COMMUNICATIONS INC00401C108COM390,565$22,399,000thousands by filing date
GREEN DOT CORP CLASS A39304D102CL A365,160$22,147,000thousands by filing date
CHILDRENS PL INC NEW168905107COM227,045$22,087,000thousands by filing date
CABOT MICROELECTRONICS CORP12709P103COM196,997$22,056,000thousands by filing date
OLD DOMINION FREIGHT LINE INC COM679580100Stock145,742$21,044,000thousands by filing date
MERITOR INC59001K100COMMON STOCK1,032,420$21,010,000thousands by filing date
INTERSECT ENT INC46071F103COM652,781$20,987,000thousands by filing date
BANK OF N T BUTTERFIELD & SOG0772R208SHS NEW577,315$20,714,000thousands by filing date
ZOGENIX INC.98978L204Common Stock375,685$20,666,000thousands by filing date
DEXCOM INC COM252131107Stock169,108$20,141,000thousands by filing date
CLOVIS ONCOLOGY INC189464100COM806,465$20,016,000thousands by filing date
CERIDIAN HCM HLDG INC15677J108COM370,147$18,989,000thousands by filing date
RALPH LAUREN CORP751212101CL A141,588$18,361,000thousands by filing date
CATALENT INC USD 0.01148806102COM448,946$18,223,000thousands by filing date
STAG INDUSTRIAL INC85254J102COM611,551$18,132,000thousands by filing date
STRATEGY INC CL A NEW594972408Stock121,971$17,594,000thousands by filing date
MOMENTA PHARMACEUTICALS INC60877T100COM1,206,964$17,537,000thousands by filing date
INPHI CORP45772F107COM395,630$17,305,000thousands by filing date
HAMILTON LANE INC407497106CL A379,266$16,528,000thousands by filing date
CME Group Inc. Class A12572Q105COM98,224$16,166,000thousands by filing date
ORION S.A.L72967109COM840,281$15,957,000thousands by filing date
WRIGHT MED GROUP N VN96617118ORD SHS501,801$15,782,000thousands by filing date
FATE THERAPEUTICS INC31189P102COM893,425$15,697,000thousands by filing date
CYRUSONE INC23283R100COM298,715$15,665,000thousands by filing date
CORREVIO PHARMA CORP22026V105COM4,788,032$15,130,000thousands by filing date
NOVOCURE LTDG6674U108ORD SHS305,185$14,701,000thousands by filing date
APELLIS PHARMACEUTICALS INC03753U106COM731,451$14,263,000thousands by filing date
ALARM COM HLDGS INC COM011642105Stock211,148$13,704,000thousands by filing date
PAYLOCITY HLDG CORP COM70438V106Stock152,484$13,600,000thousands by filing date
RED HAT INC756577102COM60,656$11,082,000thousands by filing date
CYMABAY THERAPEUTICS INC23257D103COM834,330$11,080,000thousands by filing date
TELADOC HEALTH INC87918A105COM196,580$10,930,000thousands by filing date
Abbott Laboratories002824100COM134,625$10,762,000thousands by filing date
SMARTSHEET INC. (CLASS A)83200N103COM CL A229,998$9,382,000thousands by filing date
ORCHARD THERAPEUTICS PLC68570P101ADR522,690$9,346,000thousands by filing date
Walmart Inc.931142103COM95,790$9,342,000thousands by filing date
MATSON INC COM57686G105Stock250,895$9,055,000thousands by filing date
EVOLENT HEALTH INC CL A30050B101Stock693,515$8,724,000thousands by filing date
Merck & Co.,Inc.58933Y105COM100,634$8,370,000thousands by filing date
Verizon Communications Inc92343V104COM135,635$8,020,000thousands by filing date
Texas Instruments Incorporated882508104COM73,405$7,786,000thousands by filing date
VALERO ENERGY CORP COM91913Y100Stock86,805$7,364,000thousands by filing date
ROYAL CARIBBEAN GROUP COMV7780T103Stock63,260$7,251,000thousands by filing date
CENTENNIAL RESOURCE DEV INC15136A102CL A823,310$7,237,000thousands by filing date
Coca-Cola Company191216100COM152,640$7,153,000thousands by filing date
HENRY JACK & ASSOC INC426281101COM48,129$6,677,000thousands by filing date
JPMorgan Chase & Co46625H100COM65,320$6,612,000thousands by filing date
NextEra Energy,Inc.65339F101COM30,560$5,908,000thousands by filing date
CUMMINS INC COM231021106Stock36,520$5,765,000thousands by filing date
TARGET CORP COM87612E106Stock68,995$5,538,000thousands by filing date
FIFTH THIRD BANCORP COM316773100Stock217,520$5,486,000thousands by filing date
Danaher Corporation235851102COM38,366$5,065,000thousands by filing date
Starbucks Corporation855244109COM62,173$4,622,000thousands by filing date
BHP BILLITON LIMITED SPONSORED ADS088606108ADR57,780$3,159,000thousands by filing date
LIVE NATION ENTERTAINMENT INC COM538034109Stock47,350$3,009,000thousands by filing date
INTEGRATED DEVICE TECHNOLOGY INC458118106COMMON STOCK60,580$2,968,000thousands by filing date
VAIL RESORTS INC COM91879Q109Stock12,140$2,638,000thousands by filing date
CELANESE CORP DEL COM150870103Stock21,530$2,123,000thousands by filing date
MARTEN TRANSPORT LTD573075108COM98,166$1,750,000thousands by filing date
WASTE CONNECTIONS INC COM94106B101Stock12,686$1,124,000thousands by filing date
CSX Corporation126408103COM15,000$1,122,000thousands by filing date
NEKTAR THERAPEUTICS640268108COM25,250$848,000thousands by filing date
UNIVAR INC91336L107COMMON STOCK27,650$613,000thousands by filing date
Intel Corp458140100COM9,812$527,000thousands by filing date
EXACT SCIENCES CORP COM30063P105Stock6,000$520,000thousands by filing date
BOYDGAMINGCORP103304101STOK18,820$515,000thousands by filing date
ULTRA CLEAN HLDGS INC COM90385V107Stock47,450$491,000thousands by filing date
WEST PHARMACEUTICAL SVSC INC COM955306105Stock3,700$408,000thousands by filing date
TRIVAGO N V SPON ADS A SHS N89686D105ADR90,900$393,000thousands by filing date
VEEVA SYS INC CL A COM922475108Stock2,900$368,000thousands by filing date
VISTRA CORP COM92840M102Stock13,700$357,000thousands by filing date
Citigroup Inc.172967424COM5,200$324,000thousands by filing date
GROUPON INC399473107COMMON STOCK87,700$311,000thousands by filing date
VENTAS INC COM92276F100REIT4,719$301,000thousands by filing date
UNITED AIRLS HLDGS INC COM910047109Stock3,700$295,000thousands by filing date
NOKIA CORP654902204SPONSORED ADR51,100$292,000thousands by filing date
CIENA CORP COM NEW171779309Stock7,600$284,000thousands by filing date
CHART INDS INC16115Q308COM3,000$272,000thousands by filing date
TANDEM DIABETES CARE INC875372203COM NEW4,200$267,000thousands by filing date
AXONICS INC05465P101COM10,900$261,000thousands by filing date
QUOTIENT LTDG73268107SHS24,100$217,000thousands by filing date
Schlumberger Limited806857108COM4,824$210,000thousands by filing date

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-19-001505this filing2019-05-14acceptance time not in the bulk data set