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WESTFIELD CAPITAL MANAGEMENT CO LP

Q4 2023 · 13F-HR

WESTFIELD CAPITAL MANAGEMENT CO LPholdings as filed

Filed 2024-02-09 · accession 0001085146-24-001000

$17.16B
Reported value
239
Positions
2023-12-31
Period end
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Holdings as filed

CUSIPTickerIssuerValue% port.SharesClassVoting
594918104MSFTMICROSOFT CORP$585.8M3.41%1,557,889CommonSOLE
04351P101ASNDUSDASCENDIS PHARMA A/S$507.7M2.96%4,030,634CommonSOLE
037833100AAPLAPPLE INC$480.0M2.80%2,492,864CommonSOLE
02079K305GOOGLALPHABET INC$453.8M2.64%3,248,331CommonSOLE
023135106AMZNAMAZON COM INC$354.8M2.07%2,334,901CommonSOLE
893641100TDGTRANSDIGM GROUP INC$323.9M1.89%320,175CommonSOLE
67066G104NVDANVIDIA CORPORATION$295.1M1.72%595,833CommonSOLE
92826C839VVISA INC$282.8M1.65%1,086,319CommonSOLE
30303M102METAMETA PLATFORMS INC$256.4M1.49%724,433CommonSOLE
12008R107BLDRBUILDERS FIRSTSOURCE INC$236.5M1.38%1,416,611CommonSOLE
252131107DXCMDEXCOM INC$230.5M1.34%1,857,286CommonSOLE
91324P102UNHUNITEDHEALTH GROUP INC$229.1M1.34%435,077CommonSOLE
81762P102NOWSERVICENOW INC$209.3M1.22%296,250CommonSOLE
05464C101AXONAXON ENTERPRISE INC$189.0M1.10%731,721CommonSOLE
78709Y105SAIASAIA INC$164.9M0.96%376,409CommonSOLE
55305B101MHOM/I HOMES INC$163.1M0.95%1,184,431CommonSOLE
031100100AMEAMETEK INC$161.6M0.94%979,840CommonSOLE
79466L302CRMSALESFORCE INC$160.0M0.93%608,116CommonSOLE
G4705A100ICLRICON PLC$158.2M0.92%558,847CommonSOLE
45784P101PODDINSULET CORP$153.1M0.89%705,429CommonSOLE
68404L201OPCHOPTION CARE HEALTH INC$151.0M0.88%4,482,732CommonSOLE
533900106LECOLINCOLN ELEC HLDGS INC$149.6M0.87%687,841CommonSOLE
573874104MRVLMARVELL TECHNOLOGY INC$145.9M0.85%2,419,659CommonSOLE
437076102HDHOME DEPOT INC$132.3M0.77%381,839CommonSOLE
00287Y109ABBVABBVIE INC$130.1M0.76%839,739CommonSOLE
83200N103SMARGBPSMARTSHEET INC$129.4M0.75%2,706,943CommonSOLE
05352A100AVTRAVANTOR INC$123.7M0.72%5,418,922CommonSOLE
22160N109CSGPCOSTAR GROUP INC$122.2M0.71%1,398,896CommonSOLE
22160K105COSTCOSTCO WHSL CORP NEW$122.2M0.71%185,146CommonSOLE
971378104WSCWILLSCOT MOBIL MINI HLDNG CO$121.0M0.71%2,719,656CommonSOLE
77313F106RCKTROCKET PHARMACEUTICALS INC$118.1M0.69%3,941,859CommonSOLE
653656108NICENICE LTD$115.6M0.67%579,249CommonSOLE
443573100HUBSHUBSPOT INC$111.5M0.65%192,010CommonSOLE
457730109INSPINSPIRE MED SYS INC$111.0M0.65%545,619CommonSOLE
37940X102GPNGLOBAL PMTS INC$110.1M0.64%866,920CommonSOLE
90353T100UBERUBER TECHNOLOGIES INC$109.4M0.64%1,776,923CommonSOLE
552953101MGMMGM RESORTS INTERNATIONAL$107.3M0.63%2,401,407CommonSOLE
52490G102LEGNLEGEND BIOTECH CORP$106.9M0.62%1,776,247CommonSOLE
268150109DTDYNATRACE INC$106.5M0.62%1,947,452CommonSOLE
21036P108STZCONSTELLATION BRANDS INC$105.2M0.61%435,356CommonSOLE
127387108CDNSCADENCE DESIGN SYSTEM INC$104.4M0.61%383,196CommonSOLE
G3922B107GGENPACT LIMITED$103.9M0.61%2,992,134CommonSOLE
98138H101WDAYWORKDAY INC$103.8M0.61%376,037CommonSOLE
428291108HXLHEXCEL CORP NEW$103.5M0.60%1,403,184CommonSOLE
778296103ROSTROSS STORES INC$102.1M0.59%737,649CommonSOLE
302492103FLYWFLYWIRE CORPORATION$101.6M0.59%4,386,731CommonSOLE
315616102FFIVF5 INC$100.9M0.59%563,971CommonSOLE
907818108UNPUNION PAC CORP$100.4M0.58%408,634CommonSOLE
532457108LLYELI LILLY & CO$98.1M0.57%168,330CommonSOLE
50212V100LPLALPL FINL HLDGS INC$97.6M0.57%428,869CommonSOLE
516544103LNTHLANTHEUS HLDGS INC$96.9M0.56%1,563,181CommonSOLE
773903109ROKROCKWELL AUTOMATION INC$96.7M0.56%311,454CommonSOLE
574795100MASIMASIMO CORP$95.9M0.56%818,476CommonSOLE
053611109AVYAVERY DENNISON CORP$94.7M0.55%468,217CommonSOLE
882681109TXRHTEXAS ROADHOUSE INC$93.9M0.55%768,526CommonSOLE
026874784AIGAMERICAN INTL GROUP INC$93.6M0.55%1,381,419CommonSOLE
443510607HUBBHUBBELL INC$93.5M0.54%284,235CommonSOLE
303250104FICOFAIR ISAAC CORP$92.0M0.54%79,063CommonSOLE
743315103PGRPROGRESSIVE CORP$91.9M0.54%576,800CommonSOLE
92243G108PCVXVAXCYTE INC$91.4M0.53%1,455,593CommonSOLE
98980G102ZSZSCALER INC$91.3M0.53%412,063CommonSOLE
169656105CMGCHIPOTLE MEXICAN GRILL INC$91.0M0.53%39,779CommonSOLE
45168D104IDXXIDEXX LABS INC$89.4M0.52%161,104CommonSOLE
217204106CPRTCOPART INC$89.2M0.52%1,820,250CommonSOLE
92537N108VRTVERTIV HOLDINGS CO$88.2M0.51%1,835,806CommonSOLE
199908104FIXCOMFORT SYS USA INC$87.7M0.51%426,570CommonSOLE
445658107JBHTHUNT J B TRANS SVCS INC$87.6M0.51%438,407CommonSOLE
12514G108CDWCDW CORP$85.7M0.50%377,205CommonSOLE
69370C100PTCPTC INC$85.3M0.50%487,544CommonSOLE
88160R101TSLATESLA INC$84.8M0.49%341,446CommonSOLE
55354G100MSCIMSCI INC$83.8M0.49%148,123CommonSOLE
866674104SUISUN CMNTYS INC$83.7M0.49%626,591CommonSOLE
33829M101FIVEFIVE BELOW INC$83.2M0.48%390,308CommonSOLE
363576109AJGGALLAGHER ARTHUR J & CO$83.0M0.48%368,976CommonSOLE
150870103CECELANESE CORP DEL$81.3M0.47%523,002CommonSOLE
45167R104IEXIDEX CORP$80.5M0.47%370,805CommonSOLE
090572207BIOBIO RAD LABS INC$79.8M0.47%247,210CommonSOLE
70438V106PCTYPAYLOCITY HLDG CORP$79.6M0.46%483,015CommonSOLE
88025T102TENBTENABLE HLDGS INC$78.5M0.46%1,704,735CommonSOLE
15677J108DAYCERIDIAN HCM HLDG INC$78.5M0.46%1,169,029CommonSOLE
03990B101ARESARES MANAGEMENT CORPORATION$78.4M0.46%659,029CommonSOLE
64125C109NBIXNEUROCRINE BIOSCIENCES INC$78.3M0.46%594,437CommonSOLE
942622200WSOWATSCO INC$77.6M0.45%181,060CommonSOLE
45073V108ITTITT INC$76.7M0.45%642,965CommonSOLE
580135101MCDMCDONALDS CORP$76.6M0.45%258,231CommonSOLE
876030107TPRTAPESTRY INC$76.4M0.45%2,075,458CommonSOLE
693506107PPGPPG INDS INC$76.1M0.44%508,874CommonSOLE
59001A102MTHMERITAGE HOMES CORP$75.3M0.44%432,310CommonSOLE
03769M106APOAPOLLO GLOBAL MGMT INC$75.3M0.44%807,996CommonSOLE
75700L108RRRRED ROCK RESORTS INC$74.0M0.43%1,386,676CommonSOLE
929160109VMCVULCAN MATLS CO$72.3M0.42%318,371CommonSOLE
43300A203HLTHILTON WORLDWIDE HLDGS INC$70.6M0.41%387,679CommonSOLE
78409V104SPGIS&P GLOBAL INC$69.3M0.40%157,421CommonSOLE
27579R104EWBCEAST WEST BANCORP INC$67.7M0.39%940,815CommonSOLE
697435105PANWPALO ALTO NETWORKS INC$67.6M0.39%229,369CommonSOLE
216648402COOPER COS INC$67.1M0.39%177,274CommonSOLE
79589L106IOTSAMSARA INC$66.3M0.39%1,985,589CommonSOLE
92932M101WNSNWNS HLDGS LTD$65.9M0.38%1,042,815CommonSOLE
007903107AMDADVANCED MICRO DEVICES INC$64.5M0.38%437,891CommonSOLE
71424F105PRPERMIAN RESOURCES CORP$64.5M0.38%4,745,073CommonSOLE
05577W200DOOBRP INC$64.3M0.37%896,344CommonSOLE
147448104CWSTCASELLA WASTE SYS INC$64.2M0.37%751,553CommonSOLE
974155103WINGWINGSTOP INC$64.1M0.37%250,016CommonSOLE
81730H109SSENTINELONE INC$63.8M0.37%2,325,714CommonSOLE
69047Q102OVVOVINTIV INC$63.6M0.37%1,447,248CommonSOLE
09581B103OWLBLUE OWL CAPITAL INC$63.3M0.37%4,251,539CommonSOLE
931142103WMTWALMART INC$62.6M0.36%396,796CommonSOLE
36266G107GEHCGE HEALTHCARE TECHNOLOGIES I$62.5M0.36%807,725CommonSOLE
23804L103DDOGDATADOG INC$62.0M0.36%511,031CommonSOLE
109194100BFAMBRIGHT HORIZONS FAM SOL IN D$62.0M0.36%657,685CommonSOLE
405024100HAEHAEMONETICS CORP MASS$60.9M0.35%712,061CommonSOLE
55306N104MKSIMKS INSTRS INC$60.7M0.35%589,715CommonSOLE
243537107DECKDECKERS OUTDOOR CORP$60.5M0.35%90,502CommonSOLE
74275K108PCORPROCORE TECHNOLOGIES INC$60.3M0.35%871,057CommonSOLE
60937P106MDBMONGODB INC$60.3M0.35%147,377CommonSOLE
26142V105DKNGDRAFTKINGS INC NEW$59.5M0.35%1,687,008CommonSOLE
M7S64H106MNDYMONDAY COM LTD$58.7M0.34%312,490CommonSOLE
82452J109FOURSHIFT4 PMTS INC$57.4M0.33%771,545CommonSOLE
665531307NOGNORTHERN OIL & GAS INC$57.0M0.33%1,537,719CommonSOLE
29444U700EQIXEQUINIX INC$57.0M0.33%70,726CommonSOLE
94106B101WCNWASTE CONNECTIONS INC$56.9M0.33%381,501CommonSOLE
G0750C108AXTAAXALTA COATING SYS LTD$56.8M0.33%1,671,875CommonSOLE
595017104MCHPMICROCHIP TECHNOLOGY INC.$56.5M0.33%625,983CommonSOLE
45765U103NSITINSIGHT ENTERPRISES INC$56.1M0.33%316,766CommonSOLE
G8060N102STSENSATA TECHNOLOGIES HLDG PL$56.0M0.33%1,489,729CommonSOLE
808513105SCHWSCHWAB CHARLES CORP$55.9M0.33%813,015CommonSOLE
05478C105AZEKAZEK CO INC$55.9M0.33%1,462,185CommonSOLE
453204109PIIMPINJ INC$55.5M0.32%616,441CommonSOLE
25278X109FANGDIAMONDBACK ENERGY INC$54.6M0.32%351,914CommonSOLE
49714P108KNSLKINSALE CAP GROUP INC$53.7M0.31%160,376CommonSOLE
78410G104SBACSBA COMMUNICATIONS CORP NEW$53.7M0.31%211,594CommonSOLE
759916109RGENREPLIGEN CORP$52.9M0.31%294,222CommonSOLE
171484108CHDNCHURCHILL DOWNS INC$50.8M0.30%376,252CommonSOLE
G3323L100FNFABRINET$50.4M0.29%264,892CommonSOLE
05368V106AVNTAVIENT CORPORATION$49.9M0.29%1,201,508CommonSOLE
73278L105POOLPOOL CORP$49.8M0.29%125,017CommonSOLE
11135F101AVGOBROADCOM INC$49.1M0.29%44,005CommonSOLE
958102105WDCWESTERN DIGITAL CORP.$48.5M0.28%925,458CommonSOLE
016255101ALGNALIGN TECHNOLOGY INC$48.3M0.28%176,345CommonSOLE
74164M108PRIPRIMERICA INC$47.1M0.27%229,084CommonSOLE
550021109LULULULULEMON ATHLETICA INC$46.4M0.27%90,781CommonSOLE
G01767105ALKSALKERMES PLC$45.1M0.26%1,625,783CommonSOLE
679295105OKTAOKTA INC$44.6M0.26%493,029CommonSOLE
74624M102PPURE STORAGE INC$44.5M0.26%1,246,731CommonSOLE
96208T104WEXWEX INC$44.4M0.26%228,078CommonSOLE
892672106TWTRADEWEB MKTS INC$44.0M0.26%484,355CommonSOLE
G6095L109APTIV PLC$43.9M0.26%489,663CommonSOLE
55405Y100MTSIMACOM TECH SOLUTIONS HLDGS I$42.8M0.25%460,052CommonSOLE
25179M103DVNDEVON ENERGY CORP NEW$42.5M0.25%937,848CommonSOLE
45781M101INVAINNOVIVA INC$41.9M0.24%2,614,127CommonSOLE
03076C106AMPAMERIPRISE FINL INC$41.6M0.24%109,519CommonSOLE
29355A107ENPHENPHASE ENERGY INC$41.1M0.24%310,789CommonSOLE
000360206AAONAAON INC$40.9M0.24%553,545CommonSOLE
57142B104MQMARQETA INC$40.6M0.24%5,814,628CommonSOLE
89400J107TRUTRANSUNION$40.1M0.23%583,194CommonSOLE
538034109LYVLIVE NATION ENTERTAINMENT IN$39.6M0.23%422,690CommonSOLE
989207105ZBRAZEBRA TECHNOLOGIES CORPORATI$38.7M0.23%141,543CommonSOLE
099502106BAHBOOZ ALLEN HAMILTON HLDG COR$38.5M0.22%301,128CommonSOLE
758750103RRXREGAL REXNORD CORPORATION$37.8M0.22%255,153CommonSOLE
703481101PTENPATTERSON-UTI ENERGY INC$37.1M0.22%3,431,648CommonSOLE
61559X104MLTXMOONLAKE IMMUNOTHERAPEUTICS$37.0M0.22%612,050CommonSOLE
76169C100REXRREXFORD INDL RLTY INC$35.9M0.21%639,984CommonSOLE
406216101HALHALLIBURTON CO$35.0M0.20%967,163CommonSOLE
501242101KLICKULICKE & SOFFA INDS INC$33.9M0.20%620,124CommonSOLE
85254J102STAGSTAG INDL INC$33.8M0.20%861,268CommonSOLE
15678U128CERE1EURCEREVEL THERAPEUTICS HLDNG I$33.3M0.19%785,494CommonSOLE
729132100PLXSPLEXUS CORP$32.3M0.19%298,262CommonSOLE
97650W108WTFCWINTRUST FINL CORP$31.3M0.18%337,107CommonSOLE
12510Q100CCCCCC INTELLIGENT SOLUTIONS HL$30.9M0.18%2,711,038CommonSOLE
518415104LSCCLATTICE SEMICONDUCTOR CORP$30.5M0.18%442,018CommonSOLE
91347P105OLEDUNIVERSAL DISPLAY CORP$30.4M0.18%159,153CommonSOLE
13100M509CALXCALIX INC$29.8M0.17%681,620CommonSOLE
55024U109LITELUMENTUM HLDGS INC$29.7M0.17%566,100CommonSOLE
054540208ACLSAXCELIS TECHNOLOGIES INC$27.6M0.16%212,888CommonSOLE
15872M104APY1EURCHAMPIONX CORPORATION$26.0M0.15%891,381CommonSOLE
69753M105PLMRPALOMAR HLDGS INC$25.6M0.15%460,545CommonSOLE
82706C108SIMOSILICON MOTION TECHNOLOGY CO$25.0M0.15%408,149CommonSOLE
65290E101NXTNEXTRACKER INC$21.7M0.13%463,082CommonSOLE
M20791105CAMTCAMTEK LTD$19.8M0.12%284,845CommonSOLE
282559103ETNBGBP89BIO INC$19.7M0.11%1,761,148CommonSOLE
413160102HLITHARMONIC INC$19.3M0.11%1,476,793CommonSOLE
088786108BCYCBICYCLE THERAPEUTICS PLC$16.6M0.10%917,304CommonSOLE
23257D103CBAYUSDCYMABAY THERAPEUTICS INC$16.5M0.10%700,056CommonSOLE
459200101IBMINTERNATIONAL BUSINESS MACHS$15.1M0.09%92,046CommonSOLE
86800U104SMCIUSDSUPER MICRO COMPUTER INC$13.1M0.08%46,259CommonSOLE
G63365103MURAMURAL ONCOLOGY PUB LTD CO$11.8M0.07%1,985,886CommonSOLE
98420N105XENEXENON PHARMACEUTICALS INC$10.9M0.06%237,495CommonSOLE
02079K107GOOGALPHABET INC$10.4M0.06%73,886CommonSOLE
883556102TMOTHERMO FISHER SCIENTIFIC INC$10.1M0.06%19,062CommonSOLE
191216100KOCOCA COLA CO$9.9M0.06%167,638CommonSOLE
58933Y105MRKMERCK & CO INC$9.6M0.06%87,626CommonSOLE
17275R102CSCOCISCO SYS INC$9.2M0.05%182,299CommonSOLE
375558103GILDGILEAD SCIENCES INC$8.2M0.05%100,981CommonSOLE
172908105CTASCINTAS CORP$8.0M0.05%13,323CommonSOLE
N6596X109NXPINXP SEMICONDUCTORS N V$8.0M0.05%34,861CommonSOLE
624756102MLIMUELLER INDS INC$7.5M0.04%159,130CommonSOLE
060505104BACBANK AMERICA CORP$7.2M0.04%214,916CommonSOLE
649445103NYCBEURNEW YORK CMNTY BANCORP INC$7.2M0.04%705,254CommonSOLE
969904101WSMWILLIAMS SONOMA INC$7.1M0.04%35,054CommonSOLE
526057104LENLENNAR CORP$6.8M0.04%45,417CommonSOLE
19239V302CCOICOGENT COMMUNICATIONS HLDGS$6.7M0.04%88,263CommonSOLE
366651107ITGARTNER INC$6.5M0.04%14,370CommonSOLE
29472R108ELSEQUITY LIFESTYLE PPTYS INC$6.4M0.04%91,373CommonSOLE
84860W300SRCUSDSPIRIT RLTY CAP INC NEW$6.3M0.04%144,244CommonSOLE
427866108HSYHERSHEY CO$5.7M0.03%30,733CommonSOLE
872540109TJXTJX COS INC NEW$5.7M0.03%60,498CommonSOLE
65339F101NEENEXTERA ENERGY INC$5.6M0.03%92,628CommonSOLE
166764100CVXCHEVRON CORP NEW$5.3M0.03%35,499CommonSOLE
G3421J106FERG1GBXFERGUSON PLC NEW$5.2M0.03%27,058CommonSOLE
235851102DHRDANAHER CORPORATION$5.1M0.03%22,234CommonSOLE
12572Q105CMECME GROUP INC$5.1M0.03%24,200CommonSOLE
20825C104COPCONOCOPHILLIPS$5.0M0.03%43,368CommonSOLE
892356106TSCOTRACTOR SUPPLY CO$4.7M0.03%22,015CommonSOLE
31946M103FCNCAFIRST CTZNS BANCSHARES INC N$4.5M0.03%3,185CommonSOLE
754730109RJFRAYMOND JAMES FINL INC$4.5M0.03%40,095CommonSOLE
G4740B105ICHRICHOR HOLDINGS$4.3M0.03%127,750CommonSOLE
14149Y108CAHCARDINAL HEALTH INC$4.2M0.02%42,123CommonSOLE
592688105MTDMETTLER TOLEDO INTERNATIONAL$4.2M0.02%3,448CommonSOLE
887389104TKRTIMKEN CO$3.8M0.02%47,820CommonSOLE
46434V621DGROISHARES TR$3.4M0.02%63,370CommonSOLE
452308109ITWILLINOIS TOOL WKS INC$3.3M0.02%12,752CommonSOLE
422806208HEI/AHEICO CORP NEW$2.9M0.02%20,130CommonSOLE
75321W103PACKRANPAK HOLDINGS CORP$2.6M0.02%442,450CommonSOLE
038222105AMATAPPLIED MATLS INC$1.6M0.01%9,748CommonSOLE
464287671IUSGISHARES TR$1.3M0.01%12,905CommonSOLE
126408103CSXCSX CORP$991,2150.01%28,590CommonSOLE
461202103INTUINTUIT$881,2920.01%1,410CommonSOLE
G8994E103TTTRANE TECHNOLOGIES PLC$868,0400.01%3,559CommonSOLE
969457100WMBWILLIAMS COS INC$812,5840.00%23,330CommonSOLE
81369Y886XLUSELECT SECTOR SPDR TR$780,2260.00%12,320CommonSOLE
29084Q100EMEEMCOR GROUP INC$762,6220.00%3,540CommonSOLE
09857L108BKNGBOOKING HOLDINGS INC$744,9160.00%210CommonSOLE
88146M101TRNOTERRENO RLTY CORP$554,0030.00%8,840CommonSOLE
302301106EZPWEZCORP INC$522,4770.00%59,780CommonSOLE
679580100ODFLOLD DOMINION FREIGHT LINE IN$506,2570.00%1,249CommonSOLE
464287614IWFISHARES TR$422,4080.00%1,393CommonSOLE
464287648IWOISHARES TR$364,4580.00%1,445CommonSOLE
63008G203NNDMNANO DIMENSION LTD$357,7680.00%149,070CommonSOLE
637870106NSANATIONAL STORAGE AFFILIATES$325,9540.00%7,860CommonSOLE

Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.