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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 2018-03-31, filed 2018-05-14, with 248 holding rows worth $12,975,453,000.

Accession
0001085146-18-001406
Filed
2018-05-14
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q1 2018

A holdings report, 248 entries on the cover page, a total value of $12,975,453,000 stated on the cover page (in dollars after the unit check, H1), rows summing to $12,975,453,000 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
Amazon.com, Inc023135106COM226,570$327,924,000thousands by filing date
Apple Inc037833100COM1,911,372$320,690,000thousands by filing date
META PLATFORMS INC CL A30303M102COM1,638,805$261,865,000thousands by filing date
Visa Inc92826C839COM2,003,501$239,659,000thousands by filing date
Microsoft Corp594918104COM2,589,160$236,313,000thousands by filing date
Alphabet Inc. Reg. Shares C02079K107COM195,246$201,453,000thousands by filing date
AMETEK INC COM031100100Stock2,565,657$194,913,000thousands by filing date
JAZZ PHARMACEUTICALS PLC SHS USDG50871105Stock1,203,405$181,702,000thousands by filing date
Alphabet Inc. Reg. Shares A02079K305COM163,535$169,609,000thousands by filing date
CONSTELLATION BRANDS INC CL A21036P108Stock728,850$166,119,000thousands by filing date
MARRIOTT INTL INC NEW CL A571903202Stock1,216,443$165,412,000thousands by filing date
THE COOPER COMPANIES216648402COM NEW710,938$162,670,000thousands by filing date
Home Depot, Inc437076102COM899,363$160,302,000thousands by filing date
STERIS PLCG84720104SHS USD1,654,326$154,448,000thousands by filing date
Boeing Company097023105COM465,141$152,510,000thousands by filing date
UnitedHealth Group Inc91324P102COM712,092$152,388,000thousands by filing date
ServiceNow,Inc.81762P102COM908,000$150,229,000thousands by filing date
Salesforce.com, Inc79466L302COM1,287,616$149,750,000thousands by filing date
Union Pacific Corporation907818108COM1,087,131$146,143,000thousands by filing date
Progressive Corporation743315103COM2,362,109$143,923,000thousands by filing date
Adobe Inc00724F101COM640,964$138,500,000thousands by filing date
CELGENE CORP151020104COM1,475,259$131,608,000thousands by filing date
Vertex Pharmaceuticals Incorporated92532F100COM777,101$126,652,000thousands by filing date
INGERSOLL-RAND PLCG47791101SHS1,433,234$122,556,000thousands by filing date
EOG RES INC COM26875P101Stock1,109,779$116,826,000thousands by filing date
ANDEAVOR03349M105COM1,148,183$115,461,000thousands by filing date
DOWDUPONT INC26078J100COM1,800,273$114,695,000thousands by filing date
NEKTAR THERAPEUTICS640268108COM1,013,932$107,740,000thousands by filing date
Abbott Laboratories002824100COM1,756,838$105,270,000thousands by filing date
Philip Morris International Inc.718172109COM1,050,409$104,411,000thousands by filing date
METTLER TOLEDO INTERNATIONAL COM592688105Stock181,072$104,122,000thousands by filing date
UNITED AIRLS HLDGS INC COM910047109Stock1,487,045$103,305,000thousands by filing date
MasterCard, Inc57636Q104COM582,641$102,055,000thousands by filing date
COGNIZANT TECHNOLOGY SOLUTIONS CL A192446102Stock1,263,307$101,696,000thousands by filing date
MEDICINES CO584688105COM3,029,611$99,795,000thousands by filing date
CME Group Inc. Class A12572Q105COM610,726$98,779,000thousands by filing date
CELANESE CORP DEL COM150870103Stock980,149$98,221,000thousands by filing date
MGM RESORTS INTERNATIONAL552953101COM2,783,870$97,491,000thousands by filing date
ILLINOIS TOOL WKS INC452308109COM618,209$96,849,000thousands by filing date
S&P Global,Inc.78409V104COM504,360$96,363,000thousands by filing date
COSTAR GROUP INC COM22160N109Stock262,744$95,292,000thousands by filing date
LENNOX INTL INC COM526107107Stock462,501$94,521,000thousands by filing date
Bank of America Corp060505104COM3,144,783$94,312,000thousands by filing date
WORLDPAY INC981558109CL A1,143,341$94,028,000thousands by filing date
HUNT J B TRANS SVCS INC COM445658107Stock788,737$92,401,000thousands by filing date
BROADCOM LTDY09827109SHS390,548$92,033,000thousands by filing date
SUMMIT MATERIALS INC CLASS A86614U100CL A2,959,310$89,608,000thousands by filing date
PAYPALHLDGSINC70450Y103STOK1,171,080$88,850,000thousands by filing date
TELEDYNE TECHNOLOGIES INC COM879360105Stock464,323$86,907,000thousands by filing date
AVERY DENNISON CORP COM053611109Stock804,689$85,498,000thousands by filing date
BIOGEN INC COM09062X103Stock299,879$82,113,000thousands by filing date
GALLAGHER ARTHUR J & CO COM363576109Stock1,163,573$79,972,000thousands by filing date
Applied Materials,Inc.038222105COM1,420,505$78,994,000thousands by filing date
RSP PERMIAN INC74978Q105COM1,676,139$78,577,000thousands by filing date
International Business Machines Corporation459200101COM509,164$78,121,000thousands by filing date
DELPHI TECHNOLOGIES PLCG2709G107SHS1,630,056$77,672,000thousands by filing date
PINNACLE FOODS INC DEL72348P104COM1,426,489$77,173,000thousands by filing date
APTIV PLCG6095L109SHS907,637$77,122,000thousands by filing date
TRANSDIGM GROUP INC COM893641100Stock249,849$76,689,000thousands by filing date
WEX INC96208T104COM486,708$76,228,000thousands by filing date
FORTINET INC COM34959E109Stock1,329,072$71,212,000thousands by filing date
TRANSUNION COM89400J107Stock1,254,102$71,208,000thousands by filing date
RED HAT INC756577102COM475,148$71,039,000thousands by filing date
Costco Wholesale Corporation22160K105COM375,714$70,796,000thousands by filing date
MSCI INC COM55354G100Stock463,778$69,321,000thousands by filing date
FLEETCOR TECHNOLOGIES INC339041105COM338,238$68,493,000thousands by filing date
KLX INC482539103COM959,270$68,166,000thousands by filing date
SPLUNK INC848637104COM681,207$67,024,000thousands by filing date
LAM RESEARCH CORP512807108COM325,862$66,202,000thousands by filing date
COMERICAINC200340107COM675,441$64,795,000thousands by filing date
IHS MARKIT LTDG47567105SHS1,339,177$64,602,000thousands by filing date
TOTAL SYS SVCS INC891906109COM746,440$64,388,000thousands by filing date
ICON PUB LTD CO SHSG4705A100Stock535,751$63,294,000thousands by filing date
BIO RAD LABS INC090572207CL A248,444$62,131,000thousands by filing date
DOLLAR TREE INC COM256746108Stock642,790$61,001,000thousands by filing date
FLOWSERVE CORP34354P105COM1,405,642$60,906,000thousands by filing date
ALIBABA GROUP HLDG LTD01609W102SPONSORED ADS330,155$60,597,000thousands by filing date
ESSENT GROUP LTD COMG3198U102Stock1,409,279$59,979,000thousands by filing date
NICE LTD SPONSORED ADR653656108ADR622,954$58,514,000thousands by filing date
Micron Technology,Inc.595112103COM1,119,169$58,353,000thousands by filing date
BERRY GLOBAL GROUP INC08579W103COM1,048,193$57,451,000thousands by filing date
MASIMO CORP COM574795100Stock652,958$57,428,000thousands by filing date
WESTERN ALLIANCE BANCORP COM957638109Stock986,636$57,333,000thousands by filing date
ARAMARK COM03852U106Stock1,419,368$56,150,000thousands by filing date
VALERO ENERGY CORP COM91913Y100Stock587,893$54,539,000thousands by filing date
CANTEL MEDICAL CORP138098108COM484,760$54,007,000thousands by filing date
ACCELERON PHARMA INC00434H108COM1,374,198$53,731,000thousands by filing date
FIDELITY NATL INFORMATION SVCS COM31620M106Stock552,360$53,192,000thousands by filing date
American Tower Corporation03027X100COM357,151$51,908,000thousands by filing date
VAIL RESORTS INC COM91879Q109Stock232,143$51,466,000thousands by filing date
JBT MAREL CORPORATION477839104COM452,991$51,369,000thousands by filing date
E TRADE FINANCIAL CORP269246401COM NEW920,435$51,001,000thousands by filing date
BANK OF N T BUTTERFIELD & SOG0772R208SHS NEW1,117,340$50,146,000thousands by filing date
LIONS GATE ENTMNT CORP535919500CL B NON VTG2,029,344$48,867,000thousands by filing date
AXALTA COATING SYS LTD COMG0750C108Stock1,618,095$48,850,000thousands by filing date
TOPBUILD COR COM89055F103Stock622,893$47,664,000thousands by filing date
UNIVAR INC91336L107COMMON STOCK1,710,245$47,459,000thousands by filing date
SIX FLAGS ENTERTAINMENT CORP83001A102COM740,767$46,120,000thousands by filing date
IDEXX LABS INC COM45168D104Stock234,307$44,844,000thousands by filing date
REALPAGE INC75606N109COM857,913$44,183,000thousands by filing date
PIONEER NATURAL RESOURCES CO723787107COM255,880$43,955,000thousands by filing date
ELDORADO RESORTS INC28470R102COM1,326,214$43,765,000thousands by filing date
ZENDESK INC98936J101COM911,770$43,646,000thousands by filing date
LPL FINL HLDGS INC COM50212V100Stock709,387$43,322,000thousands by filing date
NEXSTAR MEDIA GROUP INC COMMON STOCK65336K103Stock641,638$42,669,000thousands by filing date
PROOFPOINT INC743424103COM374,970$42,615,000thousands by filing date
INTEGRA LIFESCIENCES HLDGS C457985208COM NEW754,066$41,730,000thousands by filing date
AUTODESK INC COM052769106Stock330,780$41,539,000thousands by filing date
MICROCHIP TECHNOLOGY INC. COM595017104Stock451,160$41,218,000thousands by filing date
ALEXANDRIA REAL ESTATE EQ INC COM015271109REIT327,050$40,845,000thousands by filing date
CRANE CO224399105COM413,885$38,384,000thousands by filing date
QUEST DIAGNOSTICS INC COM74834L100Stock380,646$38,179,000thousands by filing date
BURLINGTON STORES INC COM122017106Stock284,146$37,834,000thousands by filing date
BOYDGAMINGCORP103304101STOK1,182,545$37,676,000thousands by filing date
INSTALLED BLDG PRODS INC45780R101COM621,758$37,337,000thousands by filing date
ZOETIS INC CL A98978V103Stock437,560$36,541,000thousands by filing date
PVH CORPORATION COM693656100Stock239,370$36,248,000thousands by filing date
TIFFANY & CO NEW886547108COM369,645$36,100,000thousands by filing date
MILACRON HLDGS CORP59870L106COM1,786,145$35,973,000thousands by filing date
PALO ALTO NETWORKS INC697435105COM198,139$35,966,000thousands by filing date
FLIR SYS INC302445101COM714,365$35,725,000thousands by filing date
ENVISION HEALTHCARE CORP29414D100COM920,425$35,372,000thousands by filing date
SMITH A O CORP COM831865209Stock551,375$35,062,000thousands by filing date
RAYMOND JAMES FINL INC COM754730109Stock391,554$35,009,000thousands by filing date
Analog Devices,Inc.032654105COM377,485$34,400,000thousands by filing date
BUILDERS FIRSTSOURCE INC COM12008R107Stock1,685,969$33,450,000thousands by filing date
RUSH ENTERPRISES INC CL A781846209Stock777,386$33,031,000thousands by filing date
ROBERT HALF INC. COM770323103Stock567,625$32,860,000thousands by filing date
ORION S.A.L72967109COM1,208,815$32,759,000thousands by filing date
GRACE W R & CO DEL NEW COM38388F108Stock531,185$32,524,000thousands by filing date
DIAMONDBACK ENERGY INC COM25278X109Stock256,300$32,427,000thousands by filing date
MADISON SQUARE GRDN SPRT CORP CL A55825T103Stock131,764$32,388,000thousands by filing date
BLACK KNIGHT INC COM09215C105Stock683,705$32,203,000thousands by filing date
RYDER SYS INC COM783549108Stock440,450$32,060,000thousands by filing date
THE ULTIMATE SOFTWARE GROUP IN90385D107COM131,201$31,974,000thousands by filing date
VULCAN MATLS CO COM929160109Stock279,029$31,857,000thousands by filing date
NCR VOYIX CORPORATION62886E108COM1,009,183$31,809,000thousands by filing date
TRINSEO S AL9340P101SHS426,345$31,571,000thousands by filing date
NEW RELIC INC64829B100COMMON STOCK416,666$30,883,000thousands by filing date
EAST WEST BANCORP INC COM27579R104Stock482,735$30,190,000thousands by filing date
SUN CMNTYS INC COM866674104REIT330,104$30,162,000thousands by filing date
ROCKWELL AUTOMATION INC COM773903109Stock172,825$30,106,000thousands by filing date
FULLER H B CO COM359694106Stock595,855$29,632,000thousands by filing date
COMMSCOPE HLDG CO INC20337X109COM733,920$29,335,000thousands by filing date
TABLEAU SOFTWARE INC87336U105CL A361,005$29,176,000thousands by filing date
CLOVIS ONCOLOGY INC189464100COM550,315$29,057,000thousands by filing date
PACIFIC PREMIER BANCORP INC69478X105COM719,737$28,933,000thousands by filing date
WNS HOLDINGS LTD92932M101SPON ADR621,625$28,178,000thousands by filing date
BRINKER INTL INC COM109641100Stock777,080$28,053,000thousands by filing date
GARTNERINC366651107STOK238,155$28,012,000thousands by filing date
COHERENT INC192479103COM147,263$27,597,000thousands by filing date
PTC INC COM69370C100Stock350,731$27,361,000thousands by filing date
AMERICAN EAGLE OUTFITTERS INC COM02553E106Stock1,348,875$26,883,000thousands by filing date
ZAYO GROUP HLDGS INC COM98919V105Stock786,094$26,853,000thousands by filing date
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock267,723$26,697,000thousands by filing date
ALEXION PHARMACEUTICALS INC015351109COM239,080$26,648,000thousands by filing date
INTERXION HOLDING N.VN47279109SHS420,656$26,127,000thousands by filing date
PACIRA BIOSCIENCES INC COM695127100Stock834,282$25,988,000thousands by filing date
WATSCO INC COM942622200Stock142,195$25,733,000thousands by filing date
OLD DOMINION FREIGHT LINE INC COM679580100Stock173,903$25,559,000thousands by filing date
OMNICELL COM COM68213N109Stock583,699$25,333,000thousands by filing date
MERCURY SYS INC COM589378108Stock520,135$25,133,000thousands by filing date
TEXAS ROADHOUSE INC COM882681109Stock426,723$24,656,000thousands by filing date
EXPEDIA GROUP INC COM NEW30212P303Stock220,454$24,340,000thousands by filing date
COMMVAULT SYS INC COM204166102Stock423,587$24,229,000thousands by filing date
CYPRESS SEMICONDUCTOR CORP232806109COM1,352,740$22,942,000thousands by filing date
INTEGRATED DEVICE TECHNOLOGY INC458118106COMMON STOCK742,075$22,678,000thousands by filing date
MASTEC INC COM576323109Stock480,290$22,598,000thousands by filing date
SOTHEBYS835898107COM440,200$22,587,000thousands by filing date
CYRUSONE INC23283R100COM431,838$22,114,000thousands by filing date
CIENA CORP COM NEW171779309Stock851,286$22,048,000thousands by filing date
BOTTOMLINE TECH INC DEL101388106COM565,782$21,924,000thousands by filing date
NETAPP INC COM64110D104Stock353,650$21,817,000thousands by filing date
DANA INC235825205COM846,816$21,814,000thousands by filing date
AVEXIS INC05366U100COM174,810$21,603,000thousands by filing date
PARTY CITY HOLDCO INC702149105COM1,320,060$20,593,000thousands by filing date
HEICO CORP NEW422806208CL A288,400$20,462,000thousands by filing date
CAMDEN PPTY TR SH BEN INT133131102REIT238,200$20,052,000thousands by filing date
WRIGHT MED GROUP N VN96617118ORD SHS974,251$19,329,000thousands by filing date
MGIC INVT CORP WIS COM552848103Stock1,463,780$19,029,000thousands by filing date
FLOOR & DECOR HLDGS INC CL A339750101Stock364,515$18,999,000thousands by filing date
BMC STK HLDGS INC05591B109COM970,892$18,981,000thousands by filing date
QTS RLTY TR INC74736A103COM CL A504,745$18,282,000thousands by filing date
MKS INC. COM55306N104Stock155,116$17,939,000thousands by filing date
INDUSTRIAL LOGISTICS PPTYS T456237106COM SHS BEN INT879,075$17,880,000thousands by filing date
PINNACLE FINANCIAL PARTNERS IN72346Q104COM273,545$17,562,000thousands by filing date
LITHIA MTRS INC COM536797103Stock174,149$17,505,000thousands by filing date
STAG INDUSTRIAL INC85254J102COM713,168$17,059,000thousands by filing date
CHEGG INC163092109COM750,825$15,512,000thousands by filing date
ULTRA CLEAN HLDGS INC COM90385V107Stock805,616$15,508,000thousands by filing date
LUMENTUM HLDGS INC COM55024U109Stock242,531$15,473,000thousands by filing date
RESOLUTE ENERGY CORP76116A306COM NEW363,855$12,608,000thousands by filing date
ACLARIS THERAPEUTICS INC COM00461U105Stock710,369$12,446,000thousands by filing date
MONOLITHIC PWR SYS INC COM609839105Stock106,434$12,322,000thousands by filing date
NATIONAL VISION HLDGS INC COM63845R107Stock365,730$11,817,000thousands by filing date
WPX ENERGY INC98212B103COM781,170$11,546,000thousands by filing date
SANTANDER CONSUMER USA HOLDINGS80283M101COMMON STOCK705,100$11,493,000thousands by filing date
PROTHENA CORP PLC SHSG72800108Stock309,819$11,373,000thousands by filing date
HAMILTON LANE INC407497106CL A272,460$10,144,000thousands by filing date
NOVOCURE LTDG6674U108ORD SHS456,035$9,942,000thousands by filing date
CARDIOME PHARMA CORP14159U301COM NO PAR4,192,034$9,726,000thousands by filing date
GREEN DOT CORP CLASS A39304D102CL A149,190$9,572,000thousands by filing date
8X8 INC282914100COMMON STOCK509,020$9,493,000thousands by filing date
Eli Lilly and Company532457108COM109,170$8,446,000thousands by filing date
UNIVERSAL DISPLAY CORP91347P105COM80,392$8,120,000thousands by filing date
Texas Instruments Incorporated882508104COM76,830$7,982,000thousands by filing date
ORBOTECH LTDM75253100ORD128,094$7,965,000thousands by filing date
JPMorgan Chase & Co46625H100COM67,890$7,466,000thousands by filing date
Walmart Inc.931142103COM82,865$7,372,000thousands by filing date
CITIZENS FINL GROUP INC COM174610105Stock157,820$6,625,000thousands by filing date
CONAGRA FOODS INC205887102COM179,085$6,605,000thousands by filing date
OCCIDENTAL PETE CORP674599105COM97,215$6,315,000thousands by filing date
ROYAL CARIBBEAN GROUP COMV7780T103Stock52,655$6,200,000thousands by filing date
Thermo Fisher Scientific Inc.883556102COM29,923$6,178,000thousands by filing date
HENRY JACK & ASSOC INC426281101COM50,419$6,098,000thousands by filing date
FINANCIAL ENGINES INC317485100COM157,580$5,515,000thousands by filing date
Verizon Communications Inc92343V104COM111,654$5,339,000thousands by filing date
Johnson & Johnson478160104COM40,879$5,239,000thousands by filing date
CUMMINS INC COM231021106Stock32,300$5,236,000thousands by filing date
Honeywell Technologies438516106COM32,935$4,759,000thousands by filing date
Caterpillar Inc.149123101COM30,920$4,557,000thousands by filing date
Lockheed Martin Corporation539830109COM13,458$4,548,000thousands by filing date
ARCHER DANIELS MIDLAND CO COM039483102Stock98,260$4,262,000thousands by filing date
NextEra Energy,Inc.65339F101COM24,870$4,062,000thousands by filing date
Danaher Corporation235851102COM41,435$4,057,000thousands by filing date
CARNIVAL CORP COMMON STOCK143658300Stock60,360$3,958,000thousands by filing date
MARTEN TRANSPORT LTD573075108COM98,166$2,238,000thousands by filing date
MICROSEMI CORP595137100COM33,030$2,138,000thousands by filing date
LIVE NATION ENTERTAINMENT INC COM538034109Stock47,350$1,995,000thousands by filing date
WASTE CONNECTIONS INC COM94106B101Stock13,686$982,000thousands by filing date
CSX Corporation126408103COM15,000$836,000thousands by filing date
LIONS GATE ENTMNT CORP535919401CL A VTG27,795$718,000thousands by filing date
BREAD FINANCIAL HOLDINGS INC018581108COM3,350$713,000thousands by filing date
Merck & Co.,Inc.58933Y105COM12,159$662,000thousands by filing date
SPDR SERIES TRUST78464A698ST STR SP REGBNK8,900$537,000thousands by filing date
SBA COMMUNICATIONS CORP CL A78410G104REIT3,100$530,000thousands by filing date
ACTVISION BLIZZARD INC00507V109COM7,000$472,000thousands by filing date
ZYNGA INC.98986T108CL A128,700$471,000thousands by filing date
TANDEM DIABETES CARE INC875372203COM NEW76,300$378,000thousands by filing date
HILL ROM HLDGS INC431475102COM3,900$339,000thousands by filing date
Schlumberger Limited806857108COM4,824$312,000thousands by filing date
PAGSEGURO DIGITAL LTDG68707101COM CL A6,600$253,000thousands by filing date
NVR INC COM62944T105Stock90$252,000thousands by filing date
VENTAS INC COM92276F100REIT4,719$234,000thousands by filing date
NOVAGOLD RESOURCES INC66987E206COM NEW53,000$229,000thousands by filing date
SALEM MEDIA GROUP INC CLASS A794093104COM50,600$182,000thousands by filing date
ARCOS DORADOS HLDGS INCG0457F107SHS CLASS -A -10,370$95,000thousands by filing date
AU OPTRONICS CORP002255107SPONSORED ADR16,900$77,000thousands by filing date

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-18-001406this filing2018-05-14acceptance time not in the bulk data set