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WESTFIELD CAPITAL MANAGEMENT CO LP

Q1 2024 · 13F-HR

WESTFIELD CAPITAL MANAGEMENT CO LPholdings as filed

Filed 2024-05-10 · accession 0001085146-24-002397

$19.05B
Reported value
244
Positions
2024-03-31
Period end
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Holdings as filed

CUSIPTickerIssuerValue% port.SharesClassVoting
594918104MSFTMICROSOFT CORP$640.7M3.36%1,522,930CommonSOLE
04351P101ASNDUSDASCENDIS PHARMA A/S$616.1M3.23%4,075,214CommonSOLE
037833100AAPLAPPLE INC$555.1M2.91%3,237,247CommonSOLE
67066G104NVDANVIDIA CORPORATION$542.1M2.85%599,967CommonSOLE
023135106AMZNAMAZON COM INC$475.0M2.49%2,633,433CommonSOLE
02079K305GOOGLALPHABET INC$446.2M2.34%2,956,626CommonSOLE
893641100TDGTRANSDIGM GROUP INC$388.4M2.04%315,374CommonSOLE
30303M102METAMETA PLATFORMS INC$341.2M1.79%702,584CommonSOLE
12008R107BLDRBUILDERS FIRSTSOURCE INC$288.1M1.51%1,381,284CommonSOLE
92826C839VVISA INC$284.7M1.49%1,019,994CommonSOLE
92537N108VRTVERTIV HOLDINGS CO$277.6M1.46%3,399,272CommonSOLE
05464C101AXONAXON ENTERPRISE INC$221.9M1.17%709,306CommonSOLE
81762P102NOWSERVICENOW INC$214.5M1.13%281,388CommonSOLE
252131107DXCMDEXCOM INC$213.5M1.12%1,539,461CommonSOLE
199908104FIXCOMFORT SYS USA INC$211.9M1.11%667,036CommonSOLE
91324P102UNHUNITEDHEALTH GROUP INC$211.1M1.11%426,637CommonSOLE
G4705A100ICLRICON PLC$180.4M0.95%536,883CommonSOLE
79466L302CRMSALESFORCE INC$177.9M0.93%590,564CommonSOLE
031100100AMEAMETEK INC$174.4M0.92%953,603CommonSOLE
68404L201OPCHOPTION CARE HEALTH INC$173.4M0.91%5,171,385CommonSOLE
55305B101MHOM/I HOMES INC$166.3M0.87%1,219,989CommonSOLE
533900106LECOLINCOLN ELEC HLDGS INC$165.1M0.87%646,442CommonSOLE
00287Y109ABBVABBVIE INC$161.6M0.85%887,179CommonSOLE
22160N109CSGPCOSTAR GROUP INC$159.1M0.84%1,647,389CommonSOLE
78709Y105SAIASAIA INC$151.6M0.80%259,082CommonSOLE
653656108NICENICE LTD$148.9M0.78%571,436CommonSOLE
437076102HDHOME DEPOT INC$143.8M0.75%374,807CommonSOLE
90353T100UBERUBER TECHNOLOGIES INC$136.1M0.71%1,767,673CommonSOLE
05352A100AVTRAVANTOR INC$134.1M0.70%5,244,215CommonSOLE
971378104WSCWILLSCOT MOBIL MINI HLDNG CO$128.0M0.67%2,752,063CommonSOLE
743315103PGRPROGRESSIVE CORP$127.7M0.67%617,410CommonSOLE
52490G102LEGNLEGEND BIOTECH CORP$125.6M0.66%2,239,774CommonSOLE
217204106CPRTCOPART INC$125.5M0.66%2,167,032CommonSOLE
22160K105COSTCOSTCO WHSL CORP NEW$124.0M0.65%169,256CommonSOLE
516544103LNTHLANTHEUS HLDGS INC$121.9M0.64%1,958,018CommonSOLE
443573100HUBSHUBSPOT INC$121.8M0.64%194,437CommonSOLE
302492103FLYWFLYWIRE CORPORATION$120.0M0.63%4,837,491CommonSOLE
874039100TSMTAIWAN SEMICONDUCTOR MFG LTD$116.2M0.61%854,438CommonSOLE
21036P108STZCONSTELLATION BRANDS INC$116.1M0.61%427,161CommonSOLE
457730109INSPINSPIRE MED SYS INC$115.6M0.61%538,294CommonSOLE
37940X102GPNGLOBAL PMTS INC$115.4M0.61%863,745CommonSOLE
127387108CDNSCADENCE DESIGN SYSTEM INC$115.4M0.61%370,675CommonSOLE
974155103WINGWINGSTOP INC$115.3M0.61%314,818CommonSOLE
882681109TXRHTEXAS ROADHOUSE INC$114.4M0.60%740,719CommonSOLE
552953101MGMMGM RESORTS INTERNATIONAL$111.5M0.59%2,362,356CommonSOLE
92243G108PCVXVAXCYTE INC$108.3M0.57%1,586,095CommonSOLE
77313F106RCKTROCKET PHARMACEUTICALS INC$107.3M0.56%3,984,030CommonSOLE
026874784AIGAMERICAN INTL GROUP INC$106.8M0.56%1,366,011CommonSOLE
169656105CMGCHIPOTLE MEXICAN GRILL INC$106.3M0.56%36,567CommonSOLE
778296103ROSTROSS STORES INC$105.9M0.56%721,370CommonSOLE
907818108UNPUNION PAC CORP$103.9M0.55%422,492CommonSOLE
50212V100LPLALPL FINL HLDGS INC$101.8M0.53%385,227CommonSOLE
574795100MASIMASIMO CORP$100.8M0.53%686,100CommonSOLE
053611109AVYAVERY DENNISON CORP$100.5M0.53%450,289CommonSOLE
03769M106APOAPOLLO GLOBAL MGMT INC$99.7M0.52%886,761CommonSOLE
45073V108ITTITT INC$98.4M0.52%723,617CommonSOLE
315616102FFIVF5 INC$97.7M0.51%515,507CommonSOLE
303250104FICOFAIR ISAAC CORP$96.7M0.51%77,370CommonSOLE
98138H101WDAYWORKDAY INC$96.2M0.50%352,536CommonSOLE
M7S64H106MNDYMONDAY COM LTD$93.9M0.49%415,584CommonSOLE
443510607HUBBHUBBELL INC$93.6M0.49%225,547CommonSOLE
45168D104IDXXIDEXX LABS INC$92.9M0.49%172,021CommonSOLE
N6596X109NXPINXP SEMICONDUCTORS N V$92.8M0.49%374,539CommonSOLE
83200N103SMARGBPSMARTSHEET INC$91.9M0.48%2,386,272CommonSOLE
26142V105DKNGDRAFTKINGS INC NEW$91.2M0.48%2,007,587CommonSOLE
268150109DTDYNATRACE INC$89.3M0.47%1,923,414CommonSOLE
150870103CECELANESE CORP DEL$89.3M0.47%519,641CommonSOLE
773903109ROKROCKWELL AUTOMATION INC$88.7M0.47%304,384CommonSOLE
69370C100PTCPTC INC$88.3M0.46%467,231CommonSOLE
82452J109FOURSHIFT4 PMTS INC$88.1M0.46%1,333,252CommonSOLE
45167R104IEXIDEX CORP$87.8M0.46%359,880CommonSOLE
03990B101ARESARES MANAGEMENT CORPORATION$86.3M0.45%649,344CommonSOLE
59001A102MTHMERITAGE HOMES CORP$86.1M0.45%490,660CommonSOLE
445658107JBHTHUNT J B TRANS SVCS INC$86.0M0.45%431,427CommonSOLE
12514G108CDWCDW CORP$85.5M0.45%334,332CommonSOLE
09581B103OWLBLUE OWL CAPITAL INC$85.4M0.45%4,529,065CommonSOLE
929160109VMCVULCAN MATLS CO$85.0M0.45%311,381CommonSOLE
55354G100MSCIMSCI INC$84.4M0.44%150,518CommonSOLE
79589L106IOTSAMSARA INC$84.2M0.44%2,228,759CommonSOLE
17275R102CSCOCISCO SYS INC$84.2M0.44%1,686,503CommonSOLE
147448104CWSTCASELLA WASTE SYS INC$83.8M0.44%848,012CommonSOLE
55306N104MKSIMKS INSTRS INC$82.5M0.43%620,063CommonSOLE
43300A203HLTHILTON WORLDWIDE HLDGS INC$80.9M0.42%379,064CommonSOLE
45784P101PODDINSULET CORP$80.3M0.42%468,320CommonSOLE
71424F105PRPERMIAN RESOURCES CORP$80.2M0.42%4,541,934CommonSOLE
090572207BIOBIO RAD LABS INC$79.7M0.42%230,509CommonSOLE
60937P106MDBMONGODB INC$79.6M0.42%221,858CommonSOLE
75700L108RRRRED ROCK RESORTS INC$79.5M0.42%1,328,200CommonSOLE
216648501COOCOOPER COS INC$78.8M0.41%776,971CommonSOLE
866674104SUISUN CMNTYS INC$77.7M0.41%604,004CommonSOLE
45765U103NSITINSIGHT ENTERPRISES INC$75.2M0.39%405,407CommonSOLE
05478C105AZEKAZEK CO INC$74.7M0.39%1,487,700CommonSOLE
428291108HXLHEXCEL CORP NEW$74.2M0.39%1,018,276CommonSOLE
363576109AJGGALLAGHER ARTHUR J & CO$72.9M0.38%291,382CommonSOLE
74275K108PCORPROCORE TECHNOLOGIES INC$72.3M0.38%880,442CommonSOLE
69047Q102OVVOVINTIV INC$71.9M0.38%1,385,002CommonSOLE
109194100BFAMBRIGHT HORIZONS FAM SOL IN D$71.6M0.38%631,590CommonSOLE
98980G102ZSZSCALER INC$70.9M0.37%368,283CommonSOLE
665531307NOGNORTHERN OIL & GAS INC$69.4M0.36%1,749,749CommonSOLE
64125C109NBIXNEUROCRINE BIOSCIENCES INC$69.4M0.36%503,193CommonSOLE
931142103WMTWALMART INC$69.0M0.36%1,147,368CommonSOLE
25278X109FANGDIAMONDBACK ENERGY INC$68.5M0.36%345,635CommonSOLE
19247G107COHRCOHERENT CORP$68.5M0.36%1,129,777CommonSOLE
33829M101FIVEFIVE BELOW INC$67.8M0.36%373,679CommonSOLE
808513105SCHWSCHWAB CHARLES CORP$67.3M0.35%930,154CommonSOLE
H5919C104ONONON HLDG AG$65.9M0.35%1,862,570CommonSOLE
15677J108DAYDAYFORCE INC$65.9M0.35%994,711CommonSOLE
G0750C108AXTAAXALTA COATING SYS LTD$64.7M0.34%1,880,702CommonSOLE
016255101ALGNALIGN TECHNOLOGY INC$64.3M0.34%196,141CommonSOLE
94106B101WCNWASTE CONNECTIONS INC$63.7M0.33%370,042CommonSOLE
23804L103DDOGDATADOG INC$61.7M0.32%499,579CommonSOLE
96208T104WEXWEX INC$61.4M0.32%258,384CommonSOLE
594972408MSTRMICROSTRATEGY INC$60.9M0.32%35,723CommonSOLE
405024100HAEHAEMONETICS CORP MASS$59.7M0.31%699,861CommonSOLE
36266G107GEHCGE HEALTHCARE TECHNOLOGIES I$59.6M0.31%655,639CommonSOLE
G98196101W9N0WNS HLDGS LTD$59.1M0.31%1,170,420CommonSOLE
05368V106AVNTAVIENT CORPORATION$59.0M0.31%1,359,671CommonSOLE
803054204SAPSAP SE$58.9M0.31%302,188CommonSOLE
450056106IRTCIRHYTHM TECHNOLOGIES INC$58.3M0.31%502,678CommonSOLE
74164M108PRIPRIMERICA INC$57.8M0.30%228,650CommonSOLE
29444U700EQIXEQUINIX INC$57.3M0.30%69,419CommonSOLE
G3323L100FNFABRINET$56.8M0.30%300,421CommonSOLE
86800U104SMCIUSDSUPER MICRO COMPUTER INC$56.2M0.30%55,653CommonSOLE
007903107AMDADVANCED MICRO DEVICES INC$56.0M0.29%310,103CommonSOLE
49714P108KNSLKINSALE CAP GROUP INC$55.8M0.29%106,301CommonSOLE
816300107SIGISELECTIVE INS GROUP INC$55.5M0.29%508,085CommonSOLE
758750103RRXREGAL REXNORD CORPORATION$54.5M0.29%302,532CommonSOLE
92686J106VKTXVIKING THERAPEUTICS INC$54.3M0.29%662,131CommonSOLE
78409V104SPGIS&P GLOBAL INC$54.1M0.28%127,192CommonSOLE
171484108CHDNCHURCHILL DOWNS INC$52.4M0.28%423,521CommonSOLE
989207105ZBRAZEBRA TECHNOLOGIES CORPORATI$52.1M0.27%172,805CommonSOLE
Y2573F102FLEXFLEX LTD$51.5M0.27%1,801,579CommonSOLE
23282W605CYTKCYTOKINETICS INC$51.3M0.27%731,386CommonSOLE
88160R101TSLATESLA INC$51.2M0.27%291,060CommonSOLE
G3922B107GGENPACT LIMITED$50.7M0.27%1,539,160CommonSOLE
876030107TPRTAPESTRY INC$49.5M0.26%1,041,976CommonSOLE
37637K108GTLBGITLAB INC$49.2M0.26%843,548CommonSOLE
892672106TWTRADEWEB MKTS INC$48.3M0.25%463,365CommonSOLE
453204109PIIMPINJ INC$48.2M0.25%375,646CommonSOLE
243537107DECKDECKERS OUTDOOR CORP$47.7M0.25%50,634CommonSOLE
249906108DSGXDESCARTES SYS GROUP INC$47.5M0.25%518,744CommonSOLE
703481101PTENPATTERSON-UTI ENERGY INC$46.4M0.24%3,884,494CommonSOLE
70438V106PCTYPAYLOCITY HLDG CORP$46.0M0.24%267,830CommonSOLE
25179M103DVNDEVON ENERGY CORP NEW$45.9M0.24%913,847CommonSOLE
61559X104MLTXMOONLAKE IMMUNOTHERAPEUTICS$45.8M0.24%910,873CommonSOLE
G8060N102STSENSATA TECHNOLOGIES HLDG PL$45.3M0.24%1,233,437CommonSOLE
31946M103FCNCAFIRST CTZNS BANCSHARES INC N$45.3M0.24%27,713CommonSOLE
65290E101NXTNEXTRACKER INC$45.2M0.24%802,489CommonSOLE
78410G104SBACSBA COMMUNICATIONS CORP NEW$45.0M0.24%207,489CommonSOLE
57142B104MQMARQETA INC$44.2M0.23%7,418,851CommonSOLE
538034109LYVLIVE NATION ENTERTAINMENT IN$43.8M0.23%413,794CommonSOLE
958102105WDCWESTERN DIGITAL CORP.$43.7M0.23%640,806CommonSOLE
759916109RGENREPLIGEN CORP$43.3M0.23%235,310CommonSOLE
27579R104EWBCEAST WEST BANCORP INC$43.0M0.23%543,067CommonSOLE
493267108KEYKEYCORP$42.9M0.22%2,710,757CommonSOLE
55405Y100MTSIMACOM TECH SOLUTIONS HLDGS I$42.2M0.22%441,270CommonSOLE
88025T102TENBTENABLE HLDGS INC$40.9M0.21%828,215CommonSOLE
697435105PANWPALO ALTO NETWORKS INC$40.5M0.21%142,571CommonSOLE
466313103JBLJABIL INC$39.0M0.20%291,456CommonSOLE
M7516K103NVMINOVA LTD$38.7M0.20%217,954CommonSOLE
406216101HALHALLIBURTON CO$37.3M0.20%946,426CommonSOLE
G6095L109APTIV PLC$37.2M0.20%467,416CommonSOLE
85254J102STAGSTAG INDL INC$37.2M0.20%967,485CommonSOLE
29355A107ENPHENPHASE ENERGY INC$36.9M0.19%304,647CommonSOLE
12510Q100CCCCCC INTELLIGENT SOLUTIONS HL$36.7M0.19%3,070,975CommonSOLE
69753M105PLMRPALOMAR HLDGS INC$36.7M0.19%437,412CommonSOLE
76169C100REXRREXFORD INDL RLTY INC$36.6M0.19%727,744CommonSOLE
729132100PLXSPLEXUS CORP$36.4M0.19%384,248CommonSOLE
15872M104APY1EURCHAMPIONX CORPORATION$36.2M0.19%1,009,418CommonSOLE
53229C107LSPDLIGHTSPEED COMMERCE INC$35.0M0.18%2,488,179CommonSOLE
550021109LULULULULEMON ATHLETICA INC$34.8M0.18%89,074CommonSOLE
G01767105ALKSALKERMES PLC$34.7M0.18%1,282,741CommonSOLE
30212P303EXPEEXPEDIA GROUP INC$34.3M0.18%249,290CommonSOLE
76156B107RVLVREVOLVE GROUP INC$33.7M0.18%1,593,530CommonSOLE
97650W108WTFCWINTRUST FINL CORP$32.8M0.17%313,937CommonSOLE
45781M101INVAINNOVIVA INC$32.2M0.17%2,111,663CommonSOLE
11135F101AVGOBROADCOM INC$32.0M0.17%24,137CommonSOLE
82706C108SIMOSILICON MOTION TECHNOLOGY CO$28.8M0.15%374,303CommonSOLE
088786108BCYCBICYCLE THERAPEUTICS PLC$25.9M0.14%1,038,917CommonSOLE
282559103ETNBGBP89BIO INC$25.2M0.13%2,164,147CommonSOLE
532457108LLYELI LILLY & CO$22.0M0.12%28,325CommonSOLE
91347P105OLEDUNIVERSAL DISPLAY CORP$20.7M0.11%122,772CommonSOLE
750917106RMBSRAMBUS INC DEL$20.3M0.11%328,053CommonSOLE
13100M509CALXCALIX INC$19.4M0.10%584,576CommonSOLE
M20791105CAMTCAMTEK LTD$18.0M0.09%214,296CommonSOLE
G25457105CRDOCREDO TECHNOLOGY GROUP HOLDI$17.8M0.09%842,226CommonSOLE
459200101IBMINTERNATIONAL BUSINESS MACHS$16.7M0.09%87,218CommonSOLE
98420N105XENEXENON PHARMACEUTICALS INC$15.0M0.08%347,351CommonSOLE
87157D109SYNASYNAPTICS INC$13.1M0.07%133,916CommonSOLE
G4740B105ICHRICHOR HOLDINGS$13.0M0.07%335,867CommonSOLE
58933Y105MRKMERCK & CO INC$12.4M0.06%93,816CommonSOLE
969904101WSMWILLIAMS SONOMA INC$12.0M0.06%37,700CommonSOLE
595017104MCHPMICROCHIP TECHNOLOGY INC.$11.7M0.06%130,197CommonSOLE
191216100KOCOCA COLA CO$11.0M0.06%179,354CommonSOLE
883556102TMOTHERMO FISHER SCIENTIFIC INC$10.2M0.05%17,634CommonSOLE
02079K107GOOGALPHABET INC$9.9M0.05%65,207CommonSOLE
172908105CTASCINTAS CORP$9.8M0.05%14,277CommonSOLE
942622200WSOWATSCO INC$9.1M0.05%21,082CommonSOLE
624756102MLIMUELLER INDS INC$9.1M0.05%168,849CommonSOLE
060505104BACBANK AMERICA CORP$8.7M0.05%229,588CommonSOLE
03076C106AMPAMERIPRISE FINL INC$8.5M0.04%19,376CommonSOLE
526057104LENLENNAR CORP$8.3M0.04%48,534CommonSOLE
G63365103MURAMURAL ONCOLOGY PUB LTD CO$7.6M0.04%1,548,418CommonSOLE
427866108HSYHERSHEY CO$7.4M0.04%38,215CommonSOLE
892356106TSCOTRACTOR SUPPLY CO$7.2M0.04%27,364CommonSOLE
166764100CVXCHEVRON CORP NEW$7.2M0.04%45,387CommonSOLE
717081103PFEPFIZER INC$7.1M0.04%254,290CommonSOLE
968223206WLYWILEY JOHN & SONS INC$7.1M0.04%184,955CommonSOLE
366651107ITGARTNER INC$6.8M0.04%14,370CommonSOLE
76131D103QSRRESTAURANT BRANDS INTL INC$6.6M0.03%83,421CommonSOLE
872540109TJXTJX COS INC NEW$6.6M0.03%65,133CommonSOLE
G3421J106FERG1GBXFERGUSON PLC NEW$6.3M0.03%28,966CommonSOLE
29472R108ELSEQUITY LIFESTYLE PPTYS INC$6.3M0.03%97,687CommonSOLE
19239V302CCOICOGENT COMMUNICATIONS HLDGS$6.2M0.03%94,471CommonSOLE
20825C104COPCONOCOPHILLIPS$5.9M0.03%46,234CommonSOLE
65339F101NEENEXTERA ENERGY INC$5.7M0.03%89,841CommonSOLE
12572Q105CMECME GROUP INC$5.6M0.03%25,793CommonSOLE
231021106CMICUMMINS INC$5.2M0.03%17,796CommonSOLE
235851102DHRDANAHER CORPORATION$5.2M0.03%20,785CommonSOLE
754730109RJFRAYMOND JAMES FINL INC$5.1M0.03%40,095CommonSOLE
14149Y108CAHCARDINAL HEALTH INC$5.1M0.03%45,285CommonSOLE
31620M106FISFIDELITY NATL INFORMATION SV$4.9M0.03%65,450CommonSOLE
887389104TKRTIMKEN CO$4.2M0.02%47,820CommonSOLE
592688105MTDMETTLER TOLEDO INTERNATIONAL$3.5M0.02%2,624CommonSOLE
452308109ITWILLINOIS TOOL WKS INC$3.2M0.02%11,883CommonSOLE
75321W103PACKRANPAK HOLDINGS CORP$3.2M0.02%404,370CommonSOLE
422806208HEI/AHEICO CORP NEW$3.1M0.02%20,130CommonSOLE
573874104MRVLMARVELL TECHNOLOGY INC$2.1M0.01%28,946CommonSOLE
038222105AMATAPPLIED MATLS INC$1.3M0.01%6,518CommonSOLE
29084Q100EMEEMCOR GROUP INC$1.2M0.01%3,540CommonSOLE
126408103CSXCSX CORP$1.1M0.01%28,590CommonSOLE
G8994E103TTTRANE TECHNOLOGIES PLC$946,8310.00%3,154CommonSOLE
461202103INTUINTUIT$916,5000.00%1,410CommonSOLE
969457100WMBWILLIAMS COS INC$909,1700.00%23,330CommonSOLE
000360206AAONAAON INC$848,4030.00%9,630CommonSOLE
09857L108BKNGBOOKING HOLDINGS INC$761,8550.00%210CommonSOLE
13321L108CCJCAMECO CORP$586,9860.00%13,550CommonSOLE
88146M101TRNOTERRENO RLTY CORP$586,9760.00%8,840CommonSOLE
679580100ODFLOLD DOMINION FREIGHT LINE IN$547,8360.00%2,498CommonSOLE
63008G203NNDMNANO DIMENSION LTD$415,1600.00%149,070CommonSOLE
58450V104MAXMEDIAALPHA INC$363,6050.00%17,850CommonSOLE
852234103XYZBLOCK INC$362,0020.00%4,280CommonSOLE
637870106NSANATIONAL STORAGE AFFILIATES$307,7980.00%7,860CommonSOLE
444859102HUMHUMANA INC$293,6720.00%847CommonSOLE

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.