WESTFIELD CAPITAL MANAGEMENT CO LP Q2 2017 Filing

Filed August 11, 2017

Portfolio Value

$11.7T

Holdings

249

Report Date

Q2 2017

Filing Type

13F-HR

All Holdings (249 positions)

#StockSharesValue% PortfolioType
101
VANTIV INC
662,670$42.0B0.36%
102
OMCLOMNICELL INC
959,432$41.4B0.35%
103
BLDRBUILDERS FIRSTSOURCE INC
2,680,194$41.1B0.35%
104
DGXQUEST DIAGNOSTICS INC
364,909$40.6B0.35%
105
ALXNALEXION PHARMACEUTICALS INC
331,270$40.3B0.34%
106
MIC2EURMACQUARIE INFRASTRUCTURE COR
513,533$40.3B0.34%
107
SUISUN CMNTYS INC
455,414$39.9B0.34%
108
VLOVALERO ENERGY CORP NEW
579,303$39.1B0.33%
109
GRA1EURGRACE W R & CO DEL NEW
529,235$38.1B0.32%
110
NTBBANK OF NT BUTTERFIELD&SON L
1,117,360$38.1B0.32%
111
BMC STK HLDGS INC
1,718,041$37.5B0.32%
112
SPLKCHFSPLUNK INC
659,427$37.5B0.32%
113
CR1USDCRANE CO
471,095$37.4B0.32%
114
PRTAPROTHENA CORP PLC
684,160$37.0B0.32%
115
ESNTESSENT GROUP LTD
978,095$36.3B0.31%
116
INTERXION HOLDING N.V
785,001$35.9B0.31%
117
ODFLOLD DOMINION FGHT LINES INC
373,742$35.6B0.30%
118
AOSSMITH A O
628,404$35.4B0.30%
119
PFPTPROOFPOINT INC
398,680$34.6B0.30%
120
ACRSACLARIS THERAPEUTICS INC
1,249,254$33.9B0.29%
121
EWBCEAST WEST BANCORP INC
563,695$33.0B0.28%
122
ITGARTNER INC
262,630$32.4B0.28%
123
FCB FINL HLDGS INC
675,440$32.3B0.27%
124
PTCPTC INC
573,351$31.6B0.27%
125
CYBRCYBERARK SOFTWARE LTD
632,560$31.6B0.27%
126
WEAWESTERN ALLIANCE BANCORP
625,020$30.8B0.26%
127
4DHDANA INCORPORATED
1,353,996$30.2B0.26%
128
MSGSMADISON SQUARE GARDEN CO NEW
152,596$30.0B0.26%
129
ZEN1EURZENDESK INC
1,064,475$29.6B0.25%
130
CLVSEURCLOVIS ONCOLOGY INC
315,170$29.5B0.25%
131
ONON SEMICONDUCTOR CORP
2,068,434$29.0B0.25%
132
RPREALPAGE INC
805,363$29.0B0.25%
133
WNSNWNS HOLDINGS LTD
835,890$28.7B0.24%
134
SONIC CORP
1,056,390$28.0B0.24%
135
VMCVULCAN MATLS CO
220,522$27.9B0.24%
136
VYXNCR CORP NEW
681,268$27.8B0.24%
137
UNVREURUNIVAR INC
947,339$27.7B0.24%
138
ELECTRONICS FOR IMAGING INC
575,545$27.3B0.23%
139
BIDSOTHEBYS
507,720$27.2B0.23%
140
CVLTCOMMVAULT SYSTEMS INC
481,669$27.2B0.23%
141
INTEGRATED DEVICE TECHNOLOGY
1,047,910$27.0B0.23%
142
BYDBOYD GAMING CORP
1,087,200$27.0B0.23%
143
RUSHARUSH ENTERPRISES INC
722,639$26.9B0.23%
144
DATATABLEAU SOFTWARE INC
437,721$26.8B0.23%
145
LBRDALIBERTY BROADBAND CORP
311,320$26.7B0.23%
146
8CWCROWN CASTLE INTL CORP NEW
265,551$26.6B0.23%
147
ULTIMATE SOFTWARE GROUP INC
125,689$26.4B0.23%
148
ADSKAUTODESK INC
256,499$25.9B0.22%
149
SAVESPIRIT AIRLS INC
496,256$25.6B0.22%
150
PVHPVH CORP
222,481$25.5B0.22%
151
TQJSIGNATURE BK NEW YORK N Y
176,338$25.3B0.22%
152
LYVLIVE NATION ENTERTAINMENT IN
725,855$25.3B0.22%
153
FISFIDELITY NATL INFORMATION SV
293,900$25.1B0.21%
154
MPWRMONOLITHIC PWR SYS INC
259,887$25.1B0.21%
155
BCBRUNSWICK CORP
397,035$24.9B0.21%
156
MGMMGM RESORTS INTERNATIONAL
791,070$24.8B0.21%
157
CARDIOME PHARMA CORP
5,286,340$23.9B0.20%
158
COLUMBIA PPTY TR INC
1,037,765$23.2B0.20%
159
GOLFACUSHNET HOLDINGS CORP
1,132,095$22.5B0.19%
160
ORLYO REILLY AUTOMOTIVE INC NEW
102,435$22.4B0.19%
161
WAGEWORKS INC
328,380$22.1B0.19%
162
WSOWATSCO INC
142,521$22.0B0.19%
163
LRCXEURLAM RESEARCH CORP
154,911$21.9B0.19%
164
3M4MASIMO CORP
232,084$21.2B0.18%
165
EXPEEXPEDIA INC DEL
137,125$20.4B0.17%
166
FRCBFIRST REP BK SAN FRANCISCO C
199,610$20.0B0.17%
167
QTS RLTY TR INC
381,633$20.0B0.17%
168
STAGSTAG INDL INC
714,886$19.7B0.17%
169
LF2PACIFIC PREMIER BANCORP
533,335$19.7B0.17%
170
HAINHAIN CELESTIAL GROUP INC
499,686$19.4B0.17%
171
NVROEURNEVRO CORP
254,140$18.9B0.16%
172
KELKELLOGG CO
271,403$18.9B0.16%
173
ZAYOEURZAYO GROUP HLDGS INC
609,400$18.8B0.16%
174
BIOVERATIV INC
312,320$18.8B0.16%
175
MILACRON HLDGS CORP
1,053,495$18.5B0.16%
176
ACCUSDAMERICAN CAMPUS CMNTYS INC
389,765$18.4B0.16%
177
MXIMMAXIM INTEGRATED PRODS INC
407,542$18.3B0.16%
178
BLDTOPBUILD CORP
336,005$17.8B0.15%
179
HXLHEXCEL CORP NEW
327,094$17.3B0.15%
180
BROADSOFT INC
395,776$17.0B0.15%
181
ORBOTECH LTD
497,377$16.2B0.14%
182
MKTXMARKETAXESS HLDGS INC
79,889$16.1B0.14%
183
VIABVIACOM INC NEW
463,920$15.6B0.13%
184
FLT1EURFLEETCOR TECHNOLOGIES INC
107,925$15.6B0.13%
185
ERICERICSSON
2,138,282$15.3B0.13%
186
ALKSALKERMES PLC
262,795$15.2B0.13%
187
KAPSTONE PAPER & PACKAGING C
720,600$14.9B0.13%
188
UNITUNITI GROUP INC
552,760$13.9B0.12%
189
MATXMATSON INC
456,598$13.7B0.12%
190
EEFTEURONET WORLDWIDE INC
155,124$13.6B0.12%
191
AWMSKYWORKS SOLUTIONS INC
137,725$13.2B0.11%
192
IPGPIPG PHOTONICS CORP
89,170$12.9B0.11%
193
MTZMASTEC INC
267,415$12.1B0.10%
194
CHCTCOMMUNITY HEALTHCARE TR INC
468,307$12.0B0.10%
195
ORBCOMM INC
1,052,900$11.9B0.10%
196
IPHIINPHI CORP
346,860$11.9B0.10%
197
PANWPALO ALTO NETWORKS INC
86,754$11.6B0.10%
198
CMECME GROUP INC
90,280$11.3B0.10%
199
LITELUMENTUM HLDGS INC
191,805$10.9B0.09%
200
DLTRDOLLAR TREE INC
153,610$10.7B0.09%
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