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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 (2016Q2)
Portfolio Summary: 257 holdings with a total value of $12,120,551,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 APPLE INC 2,901,345 277,369,000 2.29%
2 JAZZ PHARMACEUTICALS PLC SHS USD 1,784,762 252,205,000 2.08%
3 MICROSOFT CORP 4,778,678 244,525,000 2.02%
4 CHARTER COMM 923,824 211,223,000 1.74%
5 STERIS PLC SHS USD 3,035,201 208,670,000 1.72%
6 CONSTELLATION BRANDS INC 1,235,277 204,315,000 1.69%
7 BRISTOL MYERS SQUIBB CO 2,719,547 200,023,000 1.65%
8 FACEBOOK INC 1,640,768 187,507,000 1.55%
9 NEWELL BRANDS 3,482,069 169,124,000 1.40%
10 ALPHABET INC 237,572 167,139,000 1.38%
11 ALPHABET INC 238,174 164,840,000 1.36%
12 CELGENE CORP 1,620,873 159,867,000 1.32%
13 VISA INC 2,112,297 156,669,000 1.29%
14 DOW CHEM CO 3,121,845 155,187,000 1.28%
15 TEVA PHARMACEUTICAL INDS LTD 2,946,519 148,004,000 1.22%
16 LOCKHEED MARTIN CORP 575,235 142,756,000 1.18%
17 SALESFORCE COM INC 1,740,751 138,233,000 1.14%
18 DANAHER CORP DEL 1,349,211 136,270,000 1.12%
19 UNITED CONTINENTAL H 3,313,048 135,967,000 1.12%
20 COOPER COS INC 785,363 134,745,000 1.11%
21 DOLLAR TREE INC 1,401,140 132,043,000 1.09%
22 PALO ALTO NETWORKS 1,066,805 130,833,000 1.08%
23 AMAZON COM INC 179,719 128,611,000 1.06%
24 TJX COS INC NEW 1,663,588 128,479,000 1.06%
25 NIELSEN HLDGS PLC 2,438,945 126,752,000 1.05%
26 UNION PAC CORP 1,442,860 125,890,000 1.04%
27 HOME DEPOT INC 981,562 125,336,000 1.03%
28 TWENTY FIRST CENTY FOX INC 4,617,995 124,917,000 1.03%
29 CELANESE 1,849,316 121,038,000 1.00%
30 SERVICENOW INC 1,659,951 110,221,000 0.91%
31 UNITED PARCEL SERVICE INC 1,021,174 110,001,000 0.91%
32 MARRIOTT INTL 1,633,056 108,533,000 0.90%
33 PRICELINE GRP INC 84,643 105,669,000 0.87%
34 KROGER CO 2,841,154 104,526,000 0.86%
35 LENNOX INTL INC 716,127 102,120,000 0.84%
36 MASTERCARD INCORPORATED 1,091,748 96,139,000 0.79%
37 VAIL RESORTS INC 675,901 93,430,000 0.77%
38 CME GROUP INC 958,218 93,330,000 0.77%
39 EQUINIX 240,655 93,309,000 0.77%
40 COSTAR GROUP 426,121 93,176,000 0.77%
41 COSTCO WHSL CORP NEW 593,085 93,138,000 0.77%
42 SYNCHRONY FINL 3,583,629 90,594,000 0.75%
43 TRANSDIGM GROUP INC COM 335,874 88,567,000 0.73%
44 ASSURANT 1,006,364 86,859,000 0.72%
45 THERMO FISHER SCIENTIFIC INC 586,384 86,644,000 0.71%
46 STARBUCKS CORP 1,511,279 86,324,000 0.71%
47 METTLER-TOLEDO 235,478 85,931,000 0.71%
48 ARAMARK 2,443,625 81,666,000 0.67%
49 LAM RESEARCH CORP 943,411 79,303,000 0.65%
50 ARIAD PHARMACEUTICALS INC 10,575,638 78,154,000 0.64%
Page 1 of 6

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001085146-16-004272, filed 2016.08.12).

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.