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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 2018-12-31, filed 2019-02-08, with 240 holding rows worth $11,724,178,000.

Accession
0001085146-19-000432
Filed
2019-02-08
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q4 2018

A holdings report, 240 entries on the cover page, a total value of $11,724,178,000 stated on the cover page (in dollars after the unit check, H1), rows summing to $11,724,178,000 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 Inc037833100COM2,026,170$319,608,000thousands by filing date
Amazon.com, Inc023135106COM202,610$304,314,000thousands by filing date
Microsoft Corp594918104COM2,163,225$219,719,000thousands by filing date
UnitedHealth Group Inc91324P102COM856,089$213,269,000thousands by filing date
Visa Inc92826C839COM1,575,721$207,901,000thousands by filing date
METTLER TOLEDO INTERNATIONAL COM592688105Stock360,628$203,964,000thousands by filing date
Alphabet Inc. Reg. Shares C02079K107COM195,364$202,321,000thousands by filing date
Boeing Company097023105COM618,535$199,478,000thousands by filing date
ServiceNow,Inc.81762P102COM1,061,707$189,037,000thousands by filing date
Salesforce.com, Inc79466L302COM1,298,519$177,858,000thousands by filing date
MARATHON PETE CORP COM56585A102Stock2,982,907$176,021,000thousands by filing date
AMETEK INC COM031100100Stock2,449,010$165,798,000thousands by filing date
Alphabet Inc. Reg. Shares A02079K305COM156,171$163,192,000thousands by filing date
THE COOPER COMPANIES216648402COM NEW628,427$159,935,000thousands by filing date
Union Pacific Corporation907818108COM1,104,349$152,654,000thousands by filing date
Home Depot, Inc437076102COM877,851$150,832,000thousands by filing date
JAZZ PHARMACEUTICALS PLC SHS USDG50871105Stock1,143,835$141,790,000thousands by filing date
TELEDYNE TECHNOLOGIES INC COM879360105Stock667,232$138,164,000thousands by filing date
INGERSOLL-RAND PLCG47791101SHS1,373,283$125,285,000thousands by filing date
Thermo Fisher Scientific Inc.883556102COM488,104$109,233,000thousands by filing date
Netflix, Inc64110L106COM402,051$107,613,000thousands by filing date
Vertex Pharmaceuticals Incorporated92532F100COM642,890$106,533,000thousands by filing date
ILLINOIS TOOL WKS INC452308109COM835,636$105,867,000thousands by filing date
Adobe Inc00724F101COM467,048$105,665,000thousands by filing date
McDonalds Corporation580135101COM591,747$105,077,000thousands by filing date
TRANSDIGM GROUP INC COM893641100Stock302,321$102,807,000thousands by filing date
STERIS PLCG84720104SHS USD958,036$102,366,000thousands by filing date
GALLAGHER ARTHUR J & CO COM363576109Stock1,376,750$101,466,000thousands by filing date
MasterCard, Inc57636Q104COM534,607$100,854,000thousands by filing date
CHARTER COMMUNICATIONS INC N16119P108COM347,114$98,917,000thousands by filing date
HUNT J B TRANS SVCS INC COM445658107Stock1,047,660$97,474,000thousands by filing date
Walt Disney Co254687106COM879,568$96,445,000thousands by filing date
LENNOX INTL INC COM526107107Stock431,698$94,481,000thousands by filing date
S&P Global,Inc.78409V104COM555,772$94,448,000thousands by filing date
Progressive Corporation743315103COM1,533,278$92,503,000thousands by filing date
International Business Machines Corporation459200101COM812,889$92,401,000thousands by filing date
AVERY DENNISON CORP COM053611109Stock1,022,285$91,832,000thousands by filing date
PAYPALHLDGSINC70450Y103STOK1,079,095$90,741,000thousands by filing date
ICON PUB LTD CO SHSG4705A100Stock698,029$90,192,000thousands by filing date
Bank of America Corp060505104COM3,656,200$90,089,000thousands by filing date
WORLDPAY INC981558109CL A1,176,131$89,892,000thousands by filing date
NIKE,Inc. Class B654106103COM1,199,078$88,900,000thousands by filing date
MEDICINES CO584688105COM4,604,719$88,134,000thousands by filing date
MADISON SQUARE GRDN SPRT CORP CL A55825T103Stock327,899$87,779,000thousands by filing date
ZENDESK INC98936J101COM1,498,026$87,440,000thousands by filing date
BIO RAD LABS INC090572207CL A376,018$87,319,000thousands by filing date
Applied Materials,Inc.038222105COM2,646,762$86,655,000thousands by filing date
MARRIOTT INTL INC NEW CL A571903202Stock792,647$86,050,000thousands by filing date
TOTAL SYS SVCS INC891906109COM1,025,574$83,369,000thousands by filing date
META PLATFORMS INC CL A30303M102COM630,631$82,669,000thousands by filing date
VAIL RESORTS INC COM91879Q109Stock388,804$81,968,000thousands by filing date
FORTINET INC COM34959E109Stock1,132,755$79,780,000thousands by filing date
Broadcom Inc.11135F101COM313,567$79,734,000thousands by filing date
EOG RES INC COM26875P101Stock900,010$78,490,000thousands by filing date
ULTA BEAUTY INC COM90384S303Stock319,943$78,335,000thousands by filing date
CONAGRA FOODS INC205887102COM3,627,915$77,492,000thousands by filing date
Costco Wholesale Corporation22160K105COM380,353$77,482,000thousands by filing date
FIDELITY NATL INFORMATION SVCS COM31620M106Stock746,207$76,524,000thousands by filing date
THE ULTIMATE SOFTWARE GROUP IN90385D107COM303,800$74,392,000thousands by filing date
IHS MARKIT LTDG47567105SHS1,541,523$73,947,000thousands by filing date
CELGENE CORP151020104COM1,142,913$73,249,000thousands by filing date
BIOGEN INC COM09062X103Stock241,059$72,539,000thousands by filing date
HAEMONETICS CORP MASS COM405024100Stock709,952$71,031,000thousands by filing date
ALEXANDRIA REAL ESTATE EQ INC COM015271109REIT599,549$69,092,000thousands by filing date
PIONEER NATURAL RESOURCES CO723787107COM524,037$68,921,000thousands by filing date
FLEETCOR TECHNOLOGIES INC339041105COM367,872$68,321,000thousands by filing date
SPLUNK INC848637104COM645,742$67,706,000thousands by filing date
NICE LTD SPONSORED ADR653656108ADR602,878$65,237,000thousands by filing date
BLACK KNIGHT INC COM09215C105Stock1,422,152$64,082,000thousands by filing date
T-Mobile US,Inc.872590104COM980,986$62,401,000thousands by filing date
LAM RESEARCH CORP512807108COM455,381$62,009,000thousands by filing date
Micron Technology,Inc.595112103COM1,913,272$60,708,000thousands by filing date
LPL FINL HLDGS INC COM50212V100Stock987,365$60,308,000thousands by filing date
HILTON WORLDWIDE HLDGS INC COM43300A203Stock813,378$58,401,000thousands by filing date
RED HAT INC756577102COM328,612$57,717,000thousands by filing date
SIX FLAGS ENTERTAINMENT CORP83001A102COM1,033,017$57,467,000thousands by filing date
ACCELERON PHARMA INC00434H108COM1,292,713$56,298,000thousands by filing date
SBA COMMUNICATIONS CORP CL A78410G104REIT344,105$55,707,000thousands by filing date
PBF ENERGY INC69318G106CL A1,506,030$49,202,000thousands by filing date
FLOWSERVE CORP34354P105COM1,289,072$49,011,000thousands by filing date
NXP SEMICONDUCTORS N V COMN6596X109Stock666,258$48,823,000thousands by filing date
MSCI INC COM55354G100Stock327,073$48,220,000thousands by filing date
TRANSUNION COM89400J107Stock846,753$48,096,000thousands by filing date
WPX ENERGY INC98212B103COM4,183,315$47,481,000thousands by filing date
IDEXX LABS INC COM45168D104Stock246,438$45,842,000thousands by filing date
RAYMOND JAMES FINL INC COM754730109Stock595,810$44,334,000thousands by filing date
QUEST DIAGNOSTICS INC COM74834L100Stock526,951$43,879,000thousands by filing date
BURLINGTON STORES INC COM122017106Stock267,000$43,433,000thousands by filing date
AUTODESK INC COM052769106Stock327,629$42,136,000thousands by filing date
WESTERN ALLIANCE BANCORP COM957638109Stock1,065,391$42,072,000thousands by filing date
GODADDY INC CL A380237107Stock639,010$41,932,000thousands by filing date
PROOFPOINT INC743424103COM493,611$41,370,000thousands by filing date
LULULEMON ATHLETICA INC550021109COM326,457$39,700,000thousands by filing date
ON SEMICONDUCTOR CORP COM682189105Stock2,398,940$39,606,000thousands by filing date
RPM INTL INC COM749685103Stock665,169$39,099,000thousands by filing date
REALPAGE INC75606N109COM810,104$39,039,000thousands by filing date
PALO ALTO NETWORKS INC697435105COM200,732$37,808,000thousands by filing date
JACK IN THE BOX INC466367109COM479,230$37,203,000thousands by filing date
DEXCOM INC COM252131107Stock306,938$36,771,000thousands by filing date
ESSENT GROUP LTD COMG3198U102Stock1,074,052$36,711,000thousands by filing date
TIFFANY & CO NEW886547108COM453,250$36,491,000thousands by filing date
KEMPER CORP COM488401100Stock539,792$35,831,000thousands by filing date
BERRY GLOBAL GROUP INC08579W103COM752,851$35,783,000thousands by filing date
GUIDEWIRE SOFTWARE INC COM40171V100Stock445,966$35,780,000thousands by filing date
TABLEAU SOFTWARE INC87336U105CL A295,556$35,467,000thousands by filing date
ROCKWELL AUTOMATION INC COM773903109Stock233,125$35,081,000thousands by filing date
TRACTOR SUPPLY CO COM892356106Stock419,418$34,996,000thousands by filing date
MARVELL TECHNOLOGY GROUP LTDG5876H105ORD2,133,825$34,547,000thousands by filing date
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR539,120$33,776,000thousands by filing date
FLIR SYS INC302445101COM769,293$33,495,000thousands by filing date
NETAPP INC COM64110D104Stock556,462$33,204,000thousands by filing date
INTERXION HOLDING N.VN47279109SHS612,351$33,165,000thousands by filing date
INTEGRA LIFESCIENCES HLDGS C457985208COM NEW730,356$32,939,000thousands by filing date
CRANE CO224399105COM455,361$32,868,000thousands by filing date
SUMMIT MATERIALS INC CLASS A86614U100CL A2,645,568$32,805,000thousands by filing date
QTS RLTY TR INC74736A103COM CL A864,525$32,031,000thousands by filing date
GRACE W R & CO DEL NEW COM38388F108Stock486,885$31,604,000thousands by filing date
BLUEPRINT MEDICINES CORP09627Y109COM582,826$31,420,000thousands by filing date
DIAMONDBACK ENERGY INC COM25278X109Stock334,687$31,025,000thousands by filing date
HEICO CORP NEW422806208CL A484,683$30,535,000thousands by filing date
SUN CMNTYS INC COM866674104REIT299,640$30,476,000thousands by filing date
RUSH ENTERPRISES INC CL A781846209Stock877,111$30,243,000thousands by filing date
SVB FINANCIAL GROUP78486Q101COM156,422$29,708,000thousands by filing date
COSTAR GROUP INC COM22160N109Stock87,644$29,566,000thousands by filing date
MSA SAFETY INC COM553498106Stock313,320$29,537,000thousands by filing date
INGEVITY CORP COM45688C107Stock351,744$29,437,000thousands by filing date
GARTNERINC366651107STOK226,256$28,925,000thousands by filing date
NEXSTAR MEDIA GROUP INC COMMON STOCK65336K103Stock364,193$28,640,000thousands by filing date
GLOBAL PMTS INC37940X102COM276,625$28,528,000thousands by filing date
TWILIO INC CL A90138F102Stock316,168$28,234,000thousands by filing date
SAREPTA THERAPEUTICS INC803607100COM255,102$27,839,000thousands by filing date
ZAYO GROUP HLDGS INC COM98919V105Stock1,196,330$27,324,000thousands by filing date
CHARLES RIV LABS INTL INC159864107COM234,677$26,561,000thousands by filing date
DAVE & BUSTERS ENTMT INC238337109COM589,565$26,271,000thousands by filing date
BLOCK INC CL A852234103Stock455,389$25,543,000thousands by filing date
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock227,373$25,341,000thousands by filing date
FAIR ISAAC CORP COM303250104Stock133,940$25,047,000thousands by filing date
SERVICEMASTER GLOBAL HOLDING81761R109COMMON STOCK675,340$24,812,000thousands by filing date
ELDORADO RESORTS INC28470R102COM662,331$23,983,000thousands by filing date
WOLVERINE WORLD WIDE INC978097103COM745,650$23,779,000thousands by filing date
SKYWORKS SOLUTIONS INC COM83088M102Stock350,634$23,499,000thousands by filing date
LINCOLN ELEC HLDGS INC533900106COM296,878$23,409,000thousands by filing date
AMERICAN EAGLE OUTFITTERS INC COM02553E106Stock1,209,205$23,374,000thousands by filing date
NOVOCURE LTDG6674U108ORD SHS685,890$22,964,000thousands by filing date
MONOLITHIC PWR SYS INC COM609839105Stock195,754$22,756,000thousands by filing date
TREX CO INC89531P105COM381,380$22,639,000thousands by filing date
MASIMO CORP COM574795100Stock205,222$22,035,000thousands by filing date
ORION S.A.L72967109COM852,680$21,556,000thousands by filing date
EAST WEST BANCORP INC COM27579R104Stock487,650$21,227,000thousands by filing date
SS&C TECH HLDGS COM78467J100Stock462,457$20,861,000thousands by filing date
ENVESTNET INC29404K106COM417,650$20,544,000thousands by filing date
LUMENTUM HLDGS INC COM55024U109Stock488,040$20,503,000thousands by filing date
NEWMARK GROUP INC65158N102CL A2,555,620$20,496,000thousands by filing date
NUANCE COMMUNICATIONS INC67020Y100COM1,547,740$20,477,000thousands by filing date
IRONWOOD PHARMACEUTICALS INC46333X108COMMON STOCK1,974,879$20,460,000thousands by filing date
UNIVAR INC91336L107COMMON STOCK1,150,937$20,418,000thousands by filing date
RYDER SYS INC COM783549108Stock420,963$20,269,000thousands by filing date
NUTANIX INC CL A67059N108Stock486,920$20,251,000thousands by filing date
VIAVI SOLUTIONS INC925550105COM1,993,944$20,039,000thousands by filing date
FIVE BELOW INC COM33829M101Stock194,983$19,951,000thousands by filing date
NEW RELIC INC64829B100COMMON STOCK243,614$19,725,000thousands by filing date
ALNYLAM PHARMACEUTICALS INC COM02043Q107Stock270,443$19,718,000thousands by filing date
ZOGENIX INC.98978L204Common Stock536,935$19,577,000thousands by filing date
ACACIA COMMUNICATIONS INC00401C108COM512,720$19,483,000thousands by filing date
INTERSECT ENT INC46071F103COM685,856$19,327,000thousands by filing date
8X8 INC282914100COMMON STOCK1,063,140$19,179,000thousands by filing date
BANK OF N T BUTTERFIELD & SOG0772R208SHS NEW607,475$19,044,000thousands by filing date
GREEN DOT CORP CLASS A39304D102CL A234,703$18,664,000thousands by filing date
WNS HOLDINGS LTD92932M101SPON ADR446,275$18,413,000thousands by filing date
OLD DOMINION FREIGHT LINE INC COM679580100Stock147,967$18,272,000thousands by filing date
HFF INC40418F108CL A541,847$17,968,000thousands by filing date
XILINX INC983919101COM208,484$17,757,000thousands by filing date
WEX INC96208T104COM121,186$16,973,000thousands by filing date
CANTEL MEDICAL CORP138098108COM210,226$15,651,000thousands by filing date
WRIGHT MED GROUP N VN96617118ORD SHS529,214$14,405,000thousands by filing date
CME Group Inc. Class A12572Q105COM75,737$14,248,000thousands by filing date
FATE THERAPEUTICS INC31189P102COM1,104,305$14,168,000thousands by filing date
INPHI CORP45772F107COM414,870$13,338,000thousands by filing date
CENTENNIAL RESOURCE DEV INC15136A102CL A1,209,310$13,327,000thousands by filing date
HAMILTON LANE INC407497106CL A357,732$13,236,000thousands by filing date
MKS INC. COM55306N104Stock190,652$12,318,000thousands by filing date
EVOLENT HEALTH INC CL A30050B101Stock610,450$12,178,000thousands by filing date
SMARTSHEET INC. (CLASS A)83200N103COM CL A486,968$12,106,000thousands by filing date
CORREVIO PHARMA CORP22026V105COM4,737,804$11,797,000thousands by filing date
ALARM COM HLDGS INC COM011642105Stock221,813$11,505,000thousands by filing date
CATALENT INC USD 0.01148806102COM347,301$10,829,000thousands by filing date
NEUROCRINE BIOSCIENCES INC64125C109COM143,740$10,264,000thousands by filing date
APELLIS PHARMACEUTICALS INC03753U106COM767,876$10,128,000thousands by filing date
Abbott Laboratories002824100COM139,150$10,065,000thousands by filing date
NATIONAL VISION HLDGS INC COM63845R107Stock349,040$9,832,000thousands by filing date
ULTRA CLEAN HLDGS INC COM90385V107Stock1,157,993$9,808,000thousands by filing date
Walmart Inc.931142103COM98,435$9,169,000thousands by filing date
COMMVAULT SYS INC COM204166102Stock150,071$8,868,000thousands by filing date
CYMABAY THERAPEUTICS INC23257D103COM1,076,215$8,470,000thousands by filing date
MATSON INC COM57686G105Stock264,020$8,454,000thousands by filing date
Merck & Co.,Inc.58933Y105COM103,189$7,885,000thousands by filing date
Verizon Communications Inc92343V104COM139,525$7,844,000thousands by filing date
ADVANCED ENERGY INDS COM007973100Stock173,030$7,428,000thousands by filing date
Medtronic PlcG5960L103COM79,205$7,204,000thousands by filing date
Texas Instruments Incorporated882508104COM75,835$7,166,000thousands by filing date
MOMENTA PHARMACEUTICALS INC60877T100COM637,360$7,036,000thousands by filing date
JPMorgan Chase & Co46625H100COM67,290$6,569,000thousands by filing date
OCCIDENTAL PETE CORP674599105COM105,275$6,462,000thousands by filing date
HENRY JACK & ASSOC INC426281101COM49,754$6,295,000thousands by filing date
ROYAL CARIBBEAN GROUP COMV7780T103Stock63,445$6,204,000thousands by filing date
DOWDUPONT INC26078J100COM114,015$6,098,000thousands by filing date
ISHARES CORE S&P U.S. GROWTH ETF464287671ETF113,403$5,976,000thousands by filing date
NextEra Energy,Inc.65339F101COM30,670$5,331,000thousands by filing date
FIFTH THIRD BANCORP COM316773100Stock218,005$5,130,000thousands by filing date
CUMMINS INC COM231021106Stock36,675$4,901,000thousands by filing date
ARCHER DANIELS MIDLAND CO COM039483102Stock113,415$4,647,000thousands by filing date
TARGET CORP COM87612E106Stock69,240$4,576,000thousands by filing date
ROBERT HALF INC. COM770323103Stock75,205$4,302,000thousands by filing date
CHEMOURS CO COM163851108Stock146,645$4,138,000thousands by filing date
MICROCHIP TECHNOLOGY INC. COM595017104Stock56,055$4,031,000thousands by filing date
Danaher Corporation235851102COM38,322$3,952,000thousands by filing date
SMITH A O CORP COM831865209Stock87,760$3,747,000thousands by filing date
INTEGRATED DEVICE TECHNOLOGY INC458118106COMMON STOCK60,580$2,934,000thousands by filing date
LIVE NATION ENTERTAINMENT INC COM538034109Stock47,350$2,332,000thousands by filing date
ISHARESRUSSELL1000GROWTHETF464287614STOK17,762$2,325,000thousands by filing date
CELANESE CORP DEL COM150870103Stock21,530$1,937,000thousands by filing date
MARTEN TRANSPORT LTD573075108COM98,166$1,589,000thousands by filing date
WASTE CONNECTIONS INC COM94106B101Stock12,686$942,000thousands by filing date
ISHARES TR464287648RUS 2000 GRW ETF5,560$934,000thousands by filing date
CSX Corporation126408103COM15,000$932,000thousands by filing date
NEKTAR THERAPEUTICS640268108COM25,250$830,000thousands by filing date
SPDR GOLD TR78463V107GOLD SHS6,300$764,000thousands by filing date
ISHARES RUSSELL MID-CAP GROWTH ETF464287481ETF6,595$750,000thousands by filing date
INNOVATIVE INDL PPTYS INC COM45781V101REIT14,100$640,000thousands by filing date
BREAD FINANCIAL HOLDINGS INC018581108COM3,350$503,000thousands by filing date
SPY78462F103SHS1,980$495,000thousands by filing date
LIONS GATE ENTMNT CORP535919401CL A VTG27,795$447,000thousands by filing date
TRIVAGO N V SPON ADS A SHS N89686D105ADR70,900$399,000thousands by filing date
BOYDGAMINGCORP103304101STOK18,820$391,000thousands by filing date
EXACT SCIENCES CORP COM30063P105Stock6,000$379,000thousands by filing date
WEST PHARMACEUTICAL SVSC INC COM955306105Stock3,700$363,000thousands by filing date
APTIV PLCG6095L109SHS5,852$360,000thousands by filing date
PVH CORPORATION COM693656100Stock3,500$325,000thousands by filing date
iShares Russell 2000 ETF464287655SHS2,415$323,000thousands by filing date
VENTAS INC COM92276F100REIT4,719$276,000thousands by filing date

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-19-000432this filing2019-02-08acceptance time not in the bulk data set