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Institutional Investment Manager
WESTFIELD CAPITAL MANAGEMENT CO LP
WESTFIELD CAPITAL MANAGEMENT CO LP (CIK: 0001177719) incorporated in Delaware, located at One Financial Center, Boston, MA. Institutional holdings reported to the SEC.

Institutional Holdings (2015Q3)
Original 13F HR (0001085146-15-002279) filed in 2015.11.12
#
Name
Shares
Value ($)
%
Options
Notes
151 MERCK & CO INC 19,659 971 0.01%
152 METTLER-TOLEDO 200,654 57,134 0.40%
153 MICROSOFT CORP 175,593 7,772 0.06%
154 MIDDLEBY CORP 776,849 81,717 0.58%
155 MONDELEZ INTL INC 6,000 251 0.00%
156 MONOLITHIC PWR SYS INC 528,292 27,049 0.19%
157 MUELLER WTR PRODUCTS INCORPORATED COM SER A 48,200 369 0.00%
158 MYLAN N V 4,995 201 0.00%
159 NATIONAL HEALTH INVS INC 240,618 13,833 0.10%
160 NAVIGATOR HLDGS LTD 1,458,468 19,471 0.14%
161 NETFLIX INC 515,402 53,220 0.38%
162 NEUROCRINE BIOSCIE COM USD0.001 1,145,845 45,593 0.32%
163 NEXSTAR MEDIA GROUP INC 928,083 43,945 0.31%
164 NIELSEN HLDGS PLC 2,758,901 122,688 0.87%
165 NORD ANGLIA EDUCATION INC 1,386,684 28,191 0.20%
166 NORTHERN TRUST 12,096 824 0.01%
167 Nice Systems LTD Sponsored 466,663 26,287 0.19%
168 OCLARO INC 127,100 292 0.00%
169 ON SEMICONDUCTOR CORP 7,668,791 72,087 0.51%
170 PACCAR INC 7,100 370 0.00%
171 PACIRA PHARMACEUTICALS INC 1,389,164 57,095 0.40%
172 PACKAGING CORP AMER 13,610 819 0.01%
173 PACWEST BANCORP DEL COM 104,050 4,454 0.03%
174 PALO ALTO NETWORKS INC 945,125 162,562 1.15%
175 PAPA JOHNS INTL INC COM 314,574 21,542 0.15%
176 PAYCHEX INC 109,012 5,192 0.04%
177 PEPSICO INC 44,602 4,206 0.03%
178 PFIZER INC 146,805 4,611 0.03%
179 POLYONE CORP 1,554,081 45,597 0.32%
180 POWER SOLUTIONS INTL INC 557,937 12,671 0.09%
181 PRICELINE GRP INC 151,550 187,446 1.33%
182 PROCTER AND GAMBLE CO 6,760 486 0.00%
183 PROTHENA CORP PLC 987,979 44,795 0.32%
184 PTC THERAPEUTICS INC 1,251,141 33,405 0.24%
185 PUMA BIOTECHNOLOGY 221,356 16,681 0.12%
186 Pandora Media Inc 1,246,890 26,609 0.19%
187 QLIK TECHNOLOGIES INC COM 1,744,165 63,575 0.45%
188 QORVO INC 305,000 13,740 0.10%
189 QUALCOMM INC 123,906 6,657 0.05%
190 QUEST DIAGNOSTICS INC 586,573 36,057 0.26%
191 QUOTIENT LTD 33,166 431 0.00%
192 R H 996,406 92,975 0.66%
193 RAPID7 INC 112,470 2,559 0.02%
194 RAYMOND JAMES FINANC 1,058,934 52,555 0.37%
195 RED HAT INC 822,556 59,125 0.42%
196 RENT A CENTER INC-NEW 1,021,350 24,768 0.18%
197 ROBERT HALF INTL INC 706,879 36,164 0.26%
198 RPM INTL INC 1,316,354 55,142 0.39%
199 RUSH ENTERPRISES INC CL A 956,009 23,135 0.16%
200 SABRE CORP 2,752,950 74,825 0.53%
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