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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 (2016Q4)
Portfolio Summary: 253 holdings with a total value of $11,405,054,000.
#
Name
Shares
Value ($)
%
Options
Notes
51 WATSCO INC 473,519 70,138,000 0.61%
52 IHS MARKIT LTD SHS 1,975,495 69,952,000 0.61%
53 BROADCOM LTD 389,838 68,912,000 0.60%
54 ICON PLC 916,280 68,904,000 0.60%
55 MASTERCARD INCORPORATED 661,385 68,288,000 0.60%
56 TWENTY FIRST CENTY FOX INC 2,333,523 65,432,000 0.57%
57 DELPHI AUTOMOTIVE PLC 966,197 65,073,000 0.57%
58 SCRIPPS NETWORKS INTERACT IN 896,775 64,003,000 0.56%
59 QUEST DIAGNOSTICS INC 690,181 63,428,000 0.56%
60 TESORO CORP 719,855 62,951,000 0.55%
61 Wright Medical Group NV 2,737,499 62,908,000 0.55%
62 BAKER HUGHES INC 960,832 62,425,000 0.55%
63 ARAMARK 1,735,285 61,984,000 0.54%
64 INSTALLED BLDG PRODS INC COM 1,497,334 61,840,000 0.54%
65 ARIAD PHARMACEUTICALS ORD (NMS) 4,957,058 61,666,000 0.54%
66 PINNACLE FOODS INC DEL 1,144,482 61,173,000 0.54%
67 APPLIED MATLS INC 1,891,672 61,044,000 0.54%
68 COSTAR GROUP 323,036 60,889,000 0.53%
69 ADOBE INC 585,098 60,236,000 0.53%
70 CIENA CORP 2,436,166 59,467,000 0.52%
71 MICROSEMI CORP 1,099,998 59,367,000 0.52%
72 TRANSUNION 1,905,801 58,946,000 0.52%
73 SABRE CORP 2,353,417 58,718,000 0.51%
74 SCHWAB CHARLES CORP 1,485,306 58,625,000 0.51%
75 PRICELINE GRP INC 39,857 58,433,000 0.51%
76 THERMO FISHER SCIENTIFIC INC 413,116 58,291,000 0.51%
77 HILL ROM HLDGS INC 1,017,223 57,107,000 0.50%
78 FORTINET INC 1,877,339 56,545,000 0.50%
79 NEUROCRINE BIOSCIE COM USD0.001 1,393,505 53,929,000 0.47%
80 MSCI INC 680,994 53,649,000 0.47%
81 EAST WEST BANCORP INC 1,053,162 53,532,000 0.47%
82 RYDER SYS INC 707,608 52,674,000 0.46%
83 JOHN BEAN TECHNOLOGIES CORP COM 609,375 52,376,000 0.46%
84 PACIRA PHARMACEUTICALS INC 1,603,681 51,799,000 0.45%
85 TOTAL SYS SVCS INC 1,048,396 51,403,000 0.45%
86 NEKTAR THERAPEUTICS COM 4,188,777 51,396,000 0.45%
87 AXALTA COATING SYS LTD 1,887,810 51,348,000 0.45%
88 RED HAT INC 726,960 50,669,000 0.44%
89 RALPH LAUREN CORP 551,305 49,794,000 0.44%
90 FIRST REP BK SAN FRANCISCO C 529,642 48,801,000 0.43%
91 ALLEGIANT TRAVEL CO 291,724 48,543,000 0.43%
92 HALLIBURTON CO 890,699 48,178,000 0.42%
93 KELLOGG CO 625,143 46,079,000 0.40%
94 RAYMOND JAMES FINANC 647,824 44,875,000 0.39%
95 DEXCOM INC 748,796 44,703,000 0.39%
96 VALERO ENERGY CORP NEW 645,583 44,106,000 0.39%
97 VANTIV INC 728,945 43,460,000 0.38%
98 SEALED AIR CORP NEW 946,970 42,936,000 0.38%
99 STAG INDL INC 1,718,748 41,027,000 0.36%
100 OLD DOMINION FREIGHT LINE IN 469,480 40,277,000 0.35%
Page 2 of 6

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001085146-17-000444, filed 2017.02.10).

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.