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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
1 APPLE INC 2,457,410 277,810,000 2.24%
2 MICROSOFT CORP 4,511,997 259,891,000 2.10%
3 FACEBOOK INC 1,727,766 221,621,000 1.79%
4 JAZZ PHARMACEUTICALS PLC SHS USD 1,637,937 198,977,000 1.61%
5 VISA INC 2,364,295 195,527,000 1.58%
6 CONSTELLATION BRANDS INC 1,171,058 194,969,000 1.57%
7 AMAZON COM INC 230,246 192,787,000 1.56%
8 STERIS PLC SHS USD 2,591,499 189,439,000 1.53%
9 NEWELL BRANDS 3,432,925 180,778,000 1.46%
10 ALPHABET INC 224,386 180,420,000 1.46%
11 ALPHABET INC 225,035 174,917,000 1.41%
12 PALO ALTO NETWORKS 1,094,559 174,396,000 1.41%
13 CHARTER COMM 633,894 171,132,000 1.38%
14 UNITED CONTINENTAL H 3,122,371 163,831,000 1.32%
15 CELGENE CORP 1,545,221 161,522,000 1.30%
16 SERVICENOW INC 1,958,712 155,032,000 1.25%
17 BRISTOL MYERS SQUIBB CO 2,557,862 137,920,000 1.11%
18 METTLER-TOLEDO 316,978 133,077,000 1.07%
19 ABBOTT LABS 2,973,638 125,755,000 1.01%
20 NIELSEN HLDGS PLC 2,298,874 123,151,000 0.99%
21 SALESFORCE COM INC 1,720,650 122,734,000 0.99%
22 COOPER COS INC 682,412 122,329,000 0.99%
23 UNION PAC CORP 1,244,775 121,403,000 0.98%
24 GILEAD SCIENCES INC 1,532,818 121,277,000 0.98%
25 DOW CHEM CO 2,337,746 121,165,000 0.98%
26 LOCKHEED MARTIN CORP 497,703 119,309,000 0.96%
27 HOME DEPOT INC 926,025 119,161,000 0.96%
28 LKQ CORP 3,284,303 116,461,000 0.94%
29 CELANESE 1,716,914 114,278,000 0.92%
30 VAIL RESORTS INC 686,845 107,752,000 0.87%
31 TJX COS INC NEW 1,434,986 107,308,000 0.87%
32 MICROSEMI CORP 2,552,912 107,171,000 0.86%
33 UNITED PARCEL SERVICE INC 954,061 104,336,000 0.84%
34 MARRIOTT INTL 1,540,654 103,732,000 0.84%
35 DANAHER CORP DEL 1,314,559 103,048,000 0.83%
36 CME GROUP INC 963,202 100,674,000 0.81%
37 ON SEMICONDUCTOR CORP 7,988,965 98,424,000 0.79%
38 TRANSDIGM GROUP INC COM 332,409 96,106,000 0.78%
39 PAYPAL HLDGS INC 2,322,433 95,150,000 0.77%
40 SYNCHRONY FINL 3,380,543 94,655,000 0.76%
41 BIOGEN INC 301,521 94,385,000 0.76%
42 LENNOX INTL INC 598,163 93,930,000 0.76%
43 UNITEDHEALTH GROUP INC 662,497 92,750,000 0.75%
44 ASSURANT 943,694 87,056,000 0.70%
45 MIDDLEBY CORP 696,864 86,146,000 0.70%
46 GENERAL ELECTRIC CO 2,877,655 85,236,000 0.69%
47 COSTAR GROUP 389,832 84,410,000 0.68%
48 DOLLAR TREE INC 1,057,329 83,455,000 0.67%
49 ARIAD PHARMACEUTICALS INC 6,001,969 82,167,000 0.66%
50 TWENTY FIRST CENTY FOX INC 3,373,818 81,714,000 0.66%
Page 1 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.