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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 (2016Q3)
Portfolio Summary: 249 holdings with a total value of $12,391,388,000.
#
Name
Shares
Value ($)
%
Options
Notes
101 HENRY SCHEIN INC 164,110 26,747,000 0.22%
102 MADISON SQUARE GARDEN CO NEW 157,883 26,747,000 0.22%
103 EXPEDIA INC DEL 239,427 27,946,000 0.23%
104 MATSON INC COM 703,681 28,063,000 0.23%
105 HURON CONSULTING 473,926 28,322,000 0.23%
106 ZAYO GROUP HOLDINGS 964,135 28,644,000 0.23%
107 STARZ SERIES A 919,410 28,676,000 0.23%
108 FIDELITY NATIONAL FINANCIAL 777,455 28,696,000 0.23%
109 ALLEGIANT TRAVEL CO 219,183 28,947,000 0.23%
110 LULULEMON ATHLETICA INC 476,795 29,075,000 0.23%
111 O REILLY AUTOMOTIVE INC NEW 104,020 29,137,000 0.24%
112 HILL ROM HLDGS INC 470,723 29,175,000 0.24%
113 KNOLL INC 1,285,025 29,363,000 0.24%
114 LIONS GATE ENTERTN 1,471,630 29,418,000 0.24%
115 AGILENT TECHNOLOGIES INC 626,934 29,522,000 0.24%
116 ALLIANCE DATA SYSTEMS CORP 139,407 29,907,000 0.24%
117 BROADSOFT INC 648,679 30,196,000 0.24%
118 RYDER SYS INC 463,545 30,571,000 0.25%
119 ZENDESK INC 1,003,275 30,811,000 0.25%
120 FLEETCOR TECHNOLOGIES INC 177,369 30,814,000 0.25%
121 MUELLER WTR PRODUCTS INCORPORATED COM SER A 2,481,131 31,138,000 0.25%
122 FLOWSERVE CORP 649,800 31,346,000 0.25%
123 PVH CORPORATION 287,905 31,814,000 0.26%
124 BRIGHT HORIZONS FAM SOL IN DEL COM 496,134 33,186,000 0.27%
125 STAG INDL INC 1,370,140 33,582,000 0.27%
126 OLD DOMINION FREIGHT LINE IN 490,415 33,647,000 0.27%
127 MASIMO CORP 575,453 34,234,000 0.28%
128 INTEGRA LIFESCIENCES HLDGS CP COM NEW 419,360 34,618,000 0.28%
129 FIRST REP BK SAN FRANCISCO C 451,234 34,795,000 0.28%
130 WR GRACE & CO 475,175 35,068,000 0.28%
131 ALIGN TECHNOLOGY INC 379,485 35,577,000 0.29%
132 B/E AEROSPACE INC 690,112 35,651,000 0.29%
133 STARWOOD PPTY TR INC COM 1,593,066 35,876,000 0.29%
134 NORFOLK SOUTHERN CORP 371,100 36,019,000 0.29%
135 DENTSPLY SIRONA INC 607,384 36,097,000 0.29%
136 FORTUNE BRANDS HOME & SEC IN 626,748 36,414,000 0.29%
137 CIENA CORP 1,680,066 36,625,000 0.30%
138 BUILDERS FIRSTSOURCE 3,196,956 36,797,000 0.30%
139 ELECTRONICS FOR IMAGING INC 752,860 36,830,000 0.30%
140 LIBERTY BROADBAND CORP COM SER A 533,040 37,398,000 0.30%
141 SCRIPPS NETWORKS INTERACT IN 596,975 37,902,000 0.31%
142 INTERPUBLIC GROUP COS INC 1,723,062 38,510,000 0.31%
143 MACQUARIE INFRASTRUCTURE COR 481,462 40,077,000 0.32%
144 WATSCO INC 285,072 40,167,000 0.32%
145 RAYMOND JAMES FINANC 695,089 40,461,000 0.33%
146 A O SMITH 414,993 40,997,000 0.33%
147 TEAM HEALTH HOLDINGS INC 1,267,680 41,276,000 0.33%
148 ULTIMATE SOFTWARE GROUP INCORPORATED 204,117 41,719,000 0.34%
149 RALPH LAUREN CORP 415,162 41,989,000 0.34%
150 TELEFLEX INC 250,288 42,061,000 0.34%
Page 3 of 5

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001085146-16-004733, filed 2016.11.10).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.