0001354488-13-006145.txt : 20131112
0001354488-13-006145.hdr.sgml : 20131111
20131112161200
ACCESSION NUMBER: 0001354488-13-006145
CONFORMED SUBMISSION TYPE: 13F-HR
PUBLIC DOCUMENT COUNT: 2
CONFORMED PERIOD OF REPORT: 20130930
FILED AS OF DATE: 20131112
DATE AS OF CHANGE: 20131112
EFFECTIVENESS DATE: 20131112
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: 131210290
BUSINESS ADDRESS:
STREET 1: ONE FINANCIAL CENTER
STREET 2: 24FL
CITY: BOSTON
STATE: MA
ZIP: 02111
BUSINESS PHONE: 6174287100
MAIL ADDRESS:
STREET 1: ONE FINANCIAL CENTER
STREET 2: 24FL
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
LIVE
false
false
false
0001177719
XXXXXXXX
09-30-2013
09-30-2013
false
WESTFIELD CAPITAL MANAGEMENT CO LP
One Financial Center
24fl
Boston
MA
02111
13F HOLDINGS REPORT
028-10220
N
Brandi McMahon
Compliance Manager
617-428-7100
/s/ Brandi McMahon
Boston
MA
11-12-2013
0
346
15642733
INFORMATION TABLE
2
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COM
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COM
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COM
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92061
2054940
SH
SOLE
1768070
0
286870
INVENSENSE INC COM
COM
46123D205
14639
830830
SH
SOLE
519830
0
311000
INVENTURE FOODS INC COM
COM
461212102
470
44800
SH
SOLE
44800
0
0
ISHARES RUS 2000 GROWTH
COM
464287648
17618
140004
SH
SOLE
0
0
140004
IXIA
COM
45071R109
16775
1070537
SH
SOLE
668670
0
401867
JARDEN CORP COM
COM
471109108
88344
1825282
SH
SOLE
1161352
0
663930
JOHN BEAN TECHNOLOGIES CORP CO
COM
477839104
468
18800
SH
SOLE
18800
0
0
JOHNSON & JOHNSON COM
COM
478160104
1084
12500
SH
SOLE
6500
0
6000
JONES LANG LASALLE INC COM
COM
48020Q107
39271
449841
SH
SOLE
278405
0
171436
JPMORGAN CHASE & CO COM
COM
46625H100
97722
1890548
SH
SOLE
1563993
0
326555
JUNIPER NETWORKS INC COM
COM
48203R104
28438
1431900
SH
SOLE
1022690
0
409210
KAPSTONE PAPER & PACKAGING CRP
COM
48562P103
36673
856836
SH
SOLE
536855
0
319981
KIMBERLY CLARK CORP COM
COM
494368103
1216
12910
SH
SOLE
11910
0
1000
KRAFT FOODS GROUP INC COM
COM
50076Q106
1373
26155
SH
SOLE
20379
0
5776
LAM RESEARCH CORP COM
COM
512807108
20067
391941
SH
SOLE
237125
0
154816
LANDSTAR SYS INC COM
COM
515098101
61404
1096895
SH
SOLE
664140
0
432755
LAS VEGAS SANDS CORP COM
COM
517834107
73254
1102895
SH
SOLE
942200
0
160695
LENNAR CORP CL A
COM
526057104
79401
2242954
SH
SOLE
1869604
0
373350
LIBERTY GLOBAL PLC SHS CL A
COM
G5480U104
39655
499745
SH
SOLE
401565
0
98180
LIGAND PHARMACEUTICALS CL B
COM
53220K207
294
6800
SH
SOLE
6800
0
0
LINCOLN ELEC HLDGS INC COM
COM
533900106
38802
582440
SH
SOLE
352570
0
229870
LINKEDIN CORPORATION
COM
53578A108
58874
239265
SH
SOLE
190975
0
48290
LITHIA MTRS INC CL A
COM
536797103
30104
412615
SH
SOLE
258425
0
154190
LKQ CORP COM
COM
501889208
33992
1066590
SH
SOLE
645500
0
421090
LOWES COS INC COM
COM
548661107
1773
37243
SH
SOLE
30100
0
7143
MACQUARIE INFRASTRUCTURE CO
COM
55608B105
1526
28500
SH
SOLE
28500
0
0
MADDEN STEVEN LTD COM
COM
556269108
25400
471854
SH
SOLE
303510
0
168344
MADISON SQUARE GARDEN CO
COM
55826P100
27836
479360
SH
SOLE
307290
0
172070
MAIDEN HOLDINGS LTD.
COM
G5753U112
390
33000
SH
SOLE
33000
0
0
MANCHESTER UNITED LTD
COM
G5784H106
25625
1475219
SH
SOLE
891507
0
583712
MARATHON PETE CORP COM
COM
56585A102
661
10280
SH
SOLE
10280
0
0
MARTIN MARIETTA MATLS INC COM
COM
573284106
31072
316510
SH
SOLE
197035
0
119475
MASCO CORP
COM
574599106
28180
1324225
SH
SOLE
939725
0
384500
MASIMO CORP COM
COM
574795100
39463
1481358
SH
SOLE
934310
0
547048
MAST THERAPEUTICS INC COM
COM
576314108
148
337600
SH
SOLE
337600
0
0
MATADOR RES CO COM
COM
576485205
8877
543613
SH
SOLE
340650
0
202963
MATSON INC COM
COM
57686G105
19797
754757
SH
SOLE
472710
0
282047
MATTEL INC COM
COM
577081102
27706
661545
SH
SOLE
468425
0
193120
MCDERMOTT INTL INC COM
COM
580037109
34554
4650575
SH
SOLE
2841395
0
1809180
MEAD JOHNSON NUTRITION CO
COM
582839106
1256
16920
SH
SOLE
16920
0
0
MEADWESTVACO CORP
COM
583334107
23787
619765
SH
SOLE
440505
0
179260
MEDIVATION INC COM
COM
58501N101
2526
42140
SH
SOLE
37940
0
4200
MEDTRONIC INC COM
COM
585055106
369
6934
SH
SOLE
5836
0
1098
MERCADOLIBRE INC
COM
58733R102
42145
312390
SH
SOLE
189020
0
123370
MERCK & CO INC NEW COM
COM
58933Y105
155157
3258986
SH
SOLE
2845660
0
413326
MERRIMACK PHARMACEUTICALS INC.
COM
590328100
5343
1409870
SH
SOLE
882930
0
526940
METLIFE INC COM
COM
59156R108
1421
30260
SH
SOLE
30260
0
0
METTLER TOLEDO INTERNATIONAL C
COM
592688105
113534
472881
SH
SOLE
302031
0
170850
MICROCHIP TECHNOLOGY
COM
595017104
21285
528305
SH
SOLE
373245
0
155060
MICROSOFT CORP COM
COM
594918104
598
17960
SH
SOLE
0
0
17960
MILLER HERMAN INC COM
COM
600544100
19352
663181
SH
SOLE
415430
0
247751
MOHAWK INDS INC
COM
608190104
38870
298425
SH
SOLE
211975
0
86450
MONDELEZ INTL INC CL A
COM
609207105
149857
4769316
SH
SOLE
4086021
0
683295
MONEYGRAM INTL INC COM NEW
COM
60935Y208
8151
416292
SH
SOLE
260098
0
156194
MONSANTO CO NEW COM
COM
61166W101
134668
1290294
SH
SOLE
1131734
0
158560
MUELLER WTR PRODS INC COM SER
COM
624758108
376
47000
SH
SOLE
47000
0
0
MULTIMEDIA GAMES INC
COM
625453105
11660
337490
SH
SOLE
229720
0
107770
MWI VETERINARY SUPPLY INC COM
COM
55402X105
57774
386809
SH
SOLE
253729
0
133080
NATIONAL OILWELL VARCO INC COM
COM
637071101
174328
2231824
SH
SOLE
1907910
0
323914
NATURAL GROCERS BY VITAMIN COT
COM
63888U108
10471
263754
SH
SOLE
165235
0
98519
NETAPP INC COM
COM
64110D104
18561
435505
SH
SOLE
307955
0
127550
NEWMARKET CORP COM
COM
651587107
371
1290
SH
SOLE
1290
0
0
NEXSTAR BROADCASTING GROUP INC
COM
65336K103
39780
893843
SH
SOLE
540025
0
353818
NICE SYS LTD SPONSORED ADR
COM
653656108
24855
600802
SH
SOLE
563832
0
36970
NIELSEN HOLDINGS N V COM
COM
N63218106
121132
3323238
SH
SOLE
2667823
0
655415
NORDSTROM INC COM
COM
655664100
19701
350555
SH
SOLE
247855
0
102700
NORFOLK SOUTHERN CORP COM
COM
655844108
55432
716640
SH
SOLE
599005
0
117635
NORTHERN TR CORP COM
COM
665859104
658
12096
SH
SOLE
12096
0
0
NUANCE COMMUNICATIONS INC COM
COM
67020Y100
62811
3362495
SH
SOLE
2085695
0
1276800
NVR INC
COM
62944T105
62550
68049
SH
SOLE
43884
0
24165
NXP SEMICONDUCTORS N V COM
COM
N6596X109
44902
1206710
SH
SOLE
751640
0
455070
OCCIDENTAL PETE CORP DEL COM
COM
674599105
6394
68360
SH
SOLE
61305
0
7055
OIL STS INTL INC COM
COM
678026105
23439
226550
SH
SOLE
142020
0
84530
OWENS CORNING NEW COM
COM
690742101
2444
64340
SH
SOLE
60840
0
3500
PACCAR INC COM
COM
693718108
74100
1331305
SH
SOLE
1108400
0
222905
PACKAGING CORP AMER COM
COM
695156109
68328
1196842
SH
SOLE
745035
0
451807
PALL CORP COM
COM
696429307
740
9600
SH
SOLE
0
0
9600
PANDORA MEDIA INC COM
COM
698354107
46621
1855205
SH
SOLE
1126660
0
728545
PENNYMAC FINANCIAL SERVICES
COM
70932B101
9032
480660
SH
SOLE
301060
0
179600
PEPSICO INC COM
COM
713448108
1201
15111
SH
SOLE
15111
0
0
PFIZER INC COM
COM
717081103
1879
65415
SH
SOLE
65415
0
0
POLYONE CORP COM
COM
73179P106
23394
761763
SH
SOLE
485990
0
275773
PPG INDS INC COM
COM
693506107
125596
751804
SH
SOLE
642659
0
109145
PRECISION CASTPARTS CORP COM
COM
740189105
132490
583038
SH
SOLE
491138
0
91900
PRICELINE COM INC COM NEW
COM
741503403
179753
177806
SH
SOLE
151434
0
26372
PROCTER & GAMBLE CO COM
COM
742718109
518
6857
SH
SOLE
4857
0
2000
PROGRESSIVE WASTE SOLUTIONS LT
COM
74339G101
32233
1252744
SH
SOLE
783280
0
469464
PVH CORP
COM
693656100
20013
168615
SH
SOLE
119765
0
48850
QLIK TECHNOLOGIES INC COM
COM
74733T105
102128
2983586
SH
SOLE
2047610
0
935976
QUALCOMM INC COM
COM
747525103
126741
1882670
SH
SOLE
1604931
0
277739
QUESTAR CORP
COM
748356102
970
43150
SH
SOLE
43150
0
0
QUIDEL CORP COM
COM
74838J101
18552
653246
SH
SOLE
409374
0
243872
RACKSPACE HOSTING INC
COM
750086100
66328
1257170
SH
SOLE
888660
0
368510
RAYMOND JAMES FINANCIAL INC.
COM
754730109
59182
1420260
SH
SOLE
881960
0
538300
RED HAT INC COM
COM
756577102
43020
932375
SH
SOLE
762705
0
169670
REINSURANCE GROUP AMER COM
COM
759351604
29260
436780
SH
SOLE
309670
0
127110
RENT A CTR INC NEW COM
COM
76009N100
1950
51180
SH
SOLE
51180
0
0
REYNOLDS AMERICAN INC COM
COM
761713106
1024
21000
SH
SOLE
21000
0
0
ROBERT HALF INTL INC
COM
770323103
20732
531190
SH
SOLE
321400
0
209790
ROCKWOOD HLDGS INC COM
COM
774415103
41155
615170
SH
SOLE
378120
0
237050
ROUSE PPTYS INC COM
COM
779287101
515
25000
SH
SOLE
25000
0
0
ROWAN COMPANIES LTD
COM
G7665A101
77164
2101410
SH
SOLE
1293590
0
807820
RUCKUS WIRELESS INC COM
COM
781220108
10237
608260
SH
SOLE
380660
0
227600
S & W SEED COMPANY
COM
785135104
296
35400
SH
SOLE
35400
0
0
SALESFORCE COM INC COM
COM
79466L302
175104
3373227
SH
SOLE
2877437
0
495790
SANGAMO BIOSCIENCES
COM
800677106
486
46300
SH
SOLE
46300
0
0
SANOFI AVENTIS SPONSORED ADR
COM
80105N105
1430
28240
SH
SOLE
28240
0
0
SBA COMMUNICATIONS CORP COM
COM
78388J106
8642
107405
SH
SOLE
76145
0
31260
SCHLUMBERGER LTD COM
COM
806857108
1732
19599
SH
SOLE
16549
0
3050
SCOTTS MIRACLE GRO CO CL A
COM
810186106
63676
1157120
SH
SOLE
716740
0
440380
SELECT COMFORT CORP COM
COM
81616X103
15126
621200
SH
SOLE
388800
0
232400
SENSATA TECHNOLOGIES HLDG BV A
COM
N7902X106
15638
408610
SH
SOLE
338130
0
70480
SEQUENOM INC
COM
817337405
203
76100
SH
SOLE
76100
0
0
SERVICE CORP INTL COM
COM
817565104
61322
3293330
SH
SOLE
1993160
0
1300170
SHUTTERFLY INC COM
COM
82568P304
25837
462370
SH
SOLE
299160
0
163210
SIGNET JEWELERS LIMITED SHS
COM
G81276100
74025
1033145
SH
SOLE
719080
0
314065
SKYWORKS SOLUTIONS INC COM
COM
83088M102
45810
1844220
SH
SOLE
1134225
0
709995
SMUCKER J M CO
COM
832696405
1257
11970
SH
SOLE
11970
0
0
SOLARWINDS INC COM
COM
83416B109
15611
445270
SH
SOLE
283630
0
161640
STANDARD PAC CORP NEW COM
COM
85375C101
26788
3386600
SH
SOLE
2120920
0
1265680
STARBUCKS CORP COM
COM
855244109
159282
2069404
SH
SOLE
1766499
0
302905
STARWOOD HOTELS&RESORTS WRLDWD
COM
85590A401
21951
330340
SH
SOLE
233670
0
96670
STARWOOD PPTY TR INC COM
COM
85571B105
39215
1635989
SH
SOLE
972750
0
663239
STATE STR CORP COM
COM
857477103
106301
1616750
SH
SOLE
1344830
0
271920
STEALTHGAS INC
COM
Y81669106
198
21700
SH
SOLE
21700
0
0
STEELCASE INC CL A
COM
858155203
36729
2209927
SH
SOLE
1384305
0
825622
STERIS CORP COM
COM
859152100
36065
839496
SH
SOLE
525755
0
313741
STIFEL FINL CORP COM
COM
860630102
27189
659610
SH
SOLE
417470
0
242140
SUNCOR ENERGY INC NEW COM
COM
867224107
88816
2482287
SH
SOLE
2058282
0
424005
SUPERIOR ENERGY SVCS INC COM
COM
868157108
29664
1184670
SH
SOLE
742430
0
442240
SYSCO CORP COM
COM
871829107
1262
39650
SH
SOLE
39650
0
0
TAYLOR MORRISON HOME CORP A
COM
87724P106
37893
1672990
SH
SOLE
1012280
0
660710
TEAM HEALTH HOLDINGS INC COM
COM
87817A107
36089
951223
SH
SOLE
595885
0
355338
TEMPUR PEDIC INTL INC COM
COM
88023U101
38883
884500
SH
SOLE
534780
0
349720
TESORO CORP COM
COM
881609101
191112
4345419
SH
SOLE
2879969
0
1465450
THERMO FISHER SCIENTIFIC INC C
COM
883556102
187871
2038750
SH
SOLE
1784561
0
254189
TIFFANY & CO NEW COM
COM
886547108
22066
287990
SH
SOLE
204530
0
83460
TIME WARNER INC COM NEW
COM
887317303
1395
21190
SH
SOLE
21190
0
0
TIMKEN CO COM
COM
887389104
47784
791121
SH
SOLE
484166
0
306955
TITAN INTL INC ILL COM
COM
88830M102
22509
1537512
SH
SOLE
962890
0
574622
TOLL BROTHERS INC
COM
889478103
30493
940285
SH
SOLE
767265
0
173020
TOTAL SYS SVCS INC
COM
891906109
83515
2838700
SH
SOLE
1842170
0
996530
TRACTOR SUPPLY CO
COM
892356106
42909
638806
SH
SOLE
395006
0
243800
TRANSDIGM GROUP INC COM
COM
893641100
83016
598527
SH
SOLE
389448
0
209079
TRINITY INDS INC COM
COM
896522109
236
5200
SH
SOLE
5200
0
0
TUPPERWARE CORP
COM
899896104
1483
17170
SH
SOLE
17170
0
0
U S PHYSICAL THERAPY COM
COM
90337L108
376
12100
SH
SOLE
12100
0
0
ULTIMATE SOFTWARE GROUP INC CO
COM
90385D107
21784
147789
SH
SOLE
96150
0
51639
UNION PAC CORP COM
COM
907818108
435
2800
SH
SOLE
0
0
2800
UNITED RENTALS INC COM
COM
911363109
51445
882570
SH
SOLE
553900
0
328670
UNITED TECHNOLOGIES CORP COM
COM
913017109
185229
1717947
SH
SOLE
1473657
0
244290
UNITEDHEALTH GROUP INC COM
COM
91324P102
229
3200
SH
SOLE
0
0
3200
URBAN OUTFITTERS INC COM
COM
917047102
59862
1628000
SH
SOLE
985570
0
642430
VALERO ENERGY CORP NEW COM
COM
91913Y100
145137
4249992
SH
SOLE
3474407
0
775585
VALIDUS HOLDINGS LTD COM SHS
COM
G9319H102
22335
603980
SH
SOLE
378010
0
225970
VALUEVISION MEDIA INC CL A
COM
92047K107
490
112400
SH
SOLE
112400
0
0
VENTAS INC
COM
92276F100
290
4719
SH
SOLE
4719
0
0
VIACOM INC NEW CL B
COM
92553P201
126126
1509044
SH
SOLE
1249829
0
259215
VIROPHARMA INC COM
COM
928241108
165583
4217610
SH
SOLE
2737612
0
1479998
VISA INC COM CL A
COM
92826C839
200455
1048956
SH
SOLE
894974
0
153982
VODAFONE GROUP PLC ADR
COM
92857W209
92785
2637445
SH
SOLE
2258080
0
379365
VOLCANO CORPORATION COM
COM
928645100
13530
564920
SH
SOLE
342345
0
222575
VULCAN MATLS CO
COM
929160109
27084
522760
SH
SOLE
372000
0
150760
WARNER CHILCOTT PLC IRELAND SH
COM
G94368100
32872
1433560
SH
SOLE
1013700
0
419860
WASTE CONNECTIONS INC COM
COM
941053100
67013
1475724
SH
SOLE
897601
0
578123
WATSCO INC COM
COM
942622200
55565
589427
SH
SOLE
390192
0
199235
WEATHERFORD INTERNATIONAL LTD
COM
H27013103
16705
1089680
SH
SOLE
895310
0
194370
WESCO INTL INC COM
COM
95082P105
72979
953595
SH
SOLE
661615
0
291980
WESTERN REFNG INC
COM
959319104
25306
842410
SH
SOLE
527610
0
314800
WEX INC COM
COM
96208T104
8595
97950
SH
SOLE
61320
0
36630
WHITEWAVE FOODS CO-A
COM
966244105
36483
1826909
SH
SOLE
1400249
0
426660
WHOLE FOODS MKT INC COM
COM
966837106
136504
2333400
SH
SOLE
1897055
0
436345
WILLIAMS SONOMA INC COM
COM
969904101
99548
1771317
SH
SOLE
1259994
0
511323
WILLIS GROUP HOLDINGS PUBLIC L
COM
G96666105
23374
539450
SH
SOLE
445010
0
94440
WNS HOLDINGS LTD SPON ADR
COM
92932M101
20690
975001
SH
SOLE
609660
0
365341
WYNDHAM WORLDWIDE CORP COM
COM
98310W108
1122
18400
SH
SOLE
18400
0
0
WYNN RESORTS LTD COM
COM
983134107
32891
208160
SH
SOLE
167075
0
41085
XILINX INC COM
COM
983919101
12016
256470
SH
SOLE
180830
0
75640
XPO LOGISTICS INC COM
COM
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