0001085146-19-002214.txt : 20190813
0001085146-19-002214.hdr.sgml : 20190813
20190813092557
ACCESSION NUMBER: 0001085146-19-002214
CONFORMED SUBMISSION TYPE: 13F-HR
PUBLIC DOCUMENT COUNT: 2
CONFORMED PERIOD OF REPORT: 20190630
FILED AS OF DATE: 20190813
DATE AS OF CHANGE: 20190813
EFFECTIVENESS DATE: 20190813
FILER:
COMPANY DATA:
COMPANY CONFORMED NAME: WESTFIELD CAPITAL MANAGEMENT CO LP
CENTRAL INDEX KEY: 0001177719
IRS NUMBER: 800175963
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: 13F-HR
SEC ACT: 1934 Act
SEC FILE NUMBER: 028-10220
FILM NUMBER: 191018455
BUSINESS ADDRESS:
STREET 1: ONE FINANCIAL CENTER
STREET 2: 23RD FLOOR
CITY: BOSTON
STATE: MA
ZIP: 02111
BUSINESS PHONE: 6174287100
MAIL ADDRESS:
STREET 1: ONE FINANCIAL CENTER
STREET 2: 23RD FLOOR
CITY: BOSTON
STATE: MA
ZIP: 02111
FORMER COMPANY:
FORMER CONFORMED NAME: WESTFIELD CAPITAL MANAGEMENT CO LLC
DATE OF NAME CHANGE: 20020717
13F-HR
1
primary_doc.xml
13F-HR
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false
true
false
0001177719
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06-30-2019
06-30-2019
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WESTFIELD CAPITAL MANAGEMENT CO LP
ONE FINANCIAL CENTER
23RD FLOOR
BOSTON
MA
02111
13F HOLDINGS REPORT
028-10220
N
Brandi McMahon
Compliance Officer
617-428-7100
/s/ Brandi McMahon
Boston
MA
08-13-2019
0
243
13283077
INFORMATION TABLE
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74624M102
57611
3772827
SH
SOLE
2895647
0
877180
QTS RLTY TR INC
COM CL A
74736A103
43592
943955
SH
SOLE
714245
0
229710
QUALCOMM INC
COM
747525103
64679
850251
SH
SOLE
656633
0
193618
QUEST DIAGNOSTICS INC
COM
74834L100
48131
472751
SH
SOLE
343496
0
129255
QUOTIENT LTD
SHS
G73268107
225
24100
SH
SOLE
24100
0
0
RALPH LAUREN CORP
CL A
751212101
20419
179757
SH
SOLE
136357
0
43400
RAYMOND JAMES FINANCIAL INC
COM
754730109
42885
507212
SH
SOLE
380607
0
126605
REALPAGE INC
COM
75606N109
44191
750917
SH
SOLE
577187
0
173730
ROCKET PHARMACEUTICALS INC
COM
77313F106
8462
564132
SH
SOLE
427402
0
136730
ROCKWELL AUTOMATION INC
COM
773903109
33008
201478
SH
SOLE
155798
0
45680
ROGERS CORP
COM
775133101
38834
225020
SH
SOLE
136593
0
88427
ROSS STORES INC
COM
778296103
50441
508891
SH
SOLE
393691
0
115200
ROYAL CARIBBEAN CRUISES LTD
COM
V7780T103
7613
62810
SH
SOLE
35625
0
27185
RPM INTL INC
COM
749685103
52136
853148
SH
SOLE
660518
0
192630
RUSH ENTERPRISES INC
CL A
781846209
29382
804535
SH
SOLE
417339
0
387196
RYDER SYS INC
COM
783549108
25722
441197
SH
SOLE
222867
0
218330
S&P GLOBAL INC
COM
78409V104
118998
522403
SH
SOLE
407716
0
114687
SALESFORCE COM INC
COM
79466L302
176215
1161370
SH
SOLE
915273
0
246097
SAREPTA THERAPEUTICS INC
COM
803607100
41613
273857
SH
SOLE
207712
0
66145
SBA COMMUNICATIONS CORP NEW
CL A
78410G104
64644
287511
SH
SOLE
223285
0
64226
SERVICENOW INC
COM
81762P102
235106
856270
SH
SOLE
670882
0
185388
SIGNATURE BK NEW YORK N Y
COM
82669G104
34906
288860
SH
SOLE
223810
0
65050
SMARTSHEET INC
COM CL A
83200N103
10495
216844
SH
SOLE
105191
0
111653
SPIRIT RLTY CAP INC NEW
COM NEW
84860W300
49585
1162327
SH
SOLE
752391
0
409936
SPLUNK INC
COM
848637104
71827
571187
SH
SOLE
443750
0
127437
SQUARE INC
CL A
852234103
32047
441850
SH
SOLE
338870
0
102980
SS&C TECHNOLOGIES HLDGS INC
COM
78467J100
64616
1121608
SH
SOLE
868188
0
253420
STARBUCKS CORP
COM
855244109
5181
61799
SH
SOLE
35484
0
26315
STERIS PLC
SHS USD
G8473T100
121188
813999
SH
SOLE
659726
0
154273
STRATEGIC ED INC
COM
86272C103
32535
182781
SH
SOLE
101831
0
80950
SUMMIT MATLS INC
CL A
86614U100
47509
2468009
SH
SOLE
1518304
0
949705
SUN CMNTYS INC
COM
866674104
35450
276545
SH
SOLE
209295
0
67250
SVB FINL GROUP
COM
78486Q101
28966
128971
SH
SOLE
100015
0
28956
T MOBILE US INC
COM
872590104
103107
1390705
SH
SOLE
1075685
0
315020
TABLEAU SOFTWARE INC
CL A
87336U105
21088
127018
SH
SOLE
61314
0
65704
TANDEM DIABETES CARE INC
COM NEW
875372203
529
8200
SH
SOLE
8200
0
0
TARGET CORP
COM
87612E106
5972
68955
SH
SOLE
38850
0
30105
TELADOC HEALTH INC
COM
87918A105
17489
263354
SH
SOLE
127474
0
135880
TELEDYNE TECHNOLOGIES INC
COM
879360105
175903
642288
SH
SOLE
459055
0
183233
TEXAS INSTRS INC
COM
882508104
8363
72875
SH
SOLE
41260
0
31615
THERMO FISHER SCIENTIFIC INC
COM
883556102
133357
454091
SH
SOLE
352230
0
101861
THUNDER BRIDGE ACQUISITION L
SHS CLASS A
G8857R100
358
34300
SH
SOLE
34300
0
0
TIMKEN CO
COM
887389104
21599
420708
SH
SOLE
205838
0
214870
TOPBUILD CORP
COM
89055F103
75263
909408
SH
SOLE
549378
0
360030
TOTAL SYS SVCS INC
COM
891906109
91288
711688
SH
SOLE
612833
0
98855
TRACTOR SUPPLY CO
COM
892356106
57081
524639
SH
SOLE
406189
0
118450
TRANSDIGM GROUP INC
COM
893641100
108352
223960
SH
SOLE
178292
0
45668
TRANSUNION
COM
89400J107
97876
1331468
SH
SOLE
1024424
0
307044
TREX CO INC
COM
89531P105
34208
477104
SH
SOLE
242574
0
234530
TURNING POINT THERAPEUTICS I
COM
90041T108
224
5500
SH
SOLE
5500
0
0
TWILIO INC
CL A
90138F102
63676
467002
SH
SOLE
366822
0
100180
ULTA BEAUTY INC
COM
90384S303
87856
253268
SH
SOLE
203405
0
49863
UNION PACIFIC CORP
COM
907818108
114990
679974
SH
SOLE
521924
0
158050
UNITEDHEALTH GROUP INC
COM
91324P102
73965
303123
SH
SOLE
218379
0
84744
UNIVAR INC
COM
91336L107
609
27650
SH
SOLE
27650
0
0
V F CORP
COM
918204108
30285
346707
SH
SOLE
268937
0
77770
VAIL RESORTS INC
COM
91879Q109
2709
12140
SH
SOLE
12140
0
0
VALERO ENERGY CORP NEW
COM
91913Y100
8074
94315
SH
SOLE
56980
0
37335
VENTAS INC
COM
92276F100
323
4719
SH
SOLE
4719
0
0
VERIZON COMMUNICATIONS INC
COM
92343V104
7694
134675
SH
SOLE
76410
0
58265
VERTEX PHARMACEUTICALS INC
COM
92532F100
145112
791320
SH
SOLE
604702
0
186618
VIAVI SOLUTIONS INC
COM
925550105
24279
1826829
SH
SOLE
897774
0
929055
VISA INC
COM CL A
92826C839
258607
1490102
SH
SOLE
1168060
0
322042
WALMART INC
COM
931142103
79415
718749
SH
SOLE
510884
0
207865
WASTE CONNECTIONS INC
COM
94106B101
1213
12686
SH
SOLE
12686
0
0
WEST PHARMACEUTICAL SVSC INC
COM
955306105
463
3700
SH
SOLE
3700
0
0
WEX INC
COM
96208T104
27565
132458
SH
SOLE
61481
0
70977
WNS HOLDINGS LTD
SPON ADR
92932M101
24186
408545
SH
SOLE
201110
0
207435
WOLVERINE WORLD WIDE INC
COM
978097103
22039
800268
SH
SOLE
393218
0
407050
WOODWARD INC
COM
980745103
55453
490039
SH
SOLE
324579
0
165460
WORLD WRESTLING ENTMT INC
CL A
98156Q108
9756
135111
SH
SOLE
103271
0
31840
WORLDPAY INC
CL A
981558109
127375
1039370
SH
SOLE
877435
0
161935
WPX ENERGY INC
COM
98212B103
41377
3594836
SH
SOLE
2099866
0
1494970
WRIGHT MED GROUP N V
ORD SHS
N96617118
14342
480957
SH
SOLE
226939
0
254018
XILINX INC
COM
983919101
29349
248888
SH
SOLE
192618
0
56270
YUM CHINA HLDGS INC
COM
98850P109
40857
884346
SH
SOLE
686346
0
198000
ZENDESK INC
COM
98936J101
87447
982224
SH
SOLE
821359
0
160865