Westfield Capital Management Company LP

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Westfield Capital Management Company LP
CRD #146990
SEC #801-69413
CIK #0001177719
AUM $24.4 B (2026-03-11)
Employees 61 (28% Investors, 0% Brokers)
Phone617-428-7100
AddressOne Financial Center
Boston, MA 02111
Source [IAPD] [EDGAR] [Website] [Twitter] [LinkedIn]
Total AUM ($B)
25201510502007201320202027
Sector Form 13F Holdings Value ($B)
Nvidia Corp 1.2
Ascendis Pharma A/S 1.1
Apple Inc 0.9
Comfort Systems USA Inc 0.9
Fortress Transportation & Infrastructure Investors LLC 0.7
Microsoft Corp 0.7
Alphabet Inc 0.6
Alcoa Inc 0.5
GS Acquisition Holdings Corp 0.5
Amazon Com Inc 0.5
View All
Holdings by Sector ($B)
30241812602011201620212027
Type Form D Funds Date Sold ($M) AUM ($M)
Other Westfield Disruptive Innovation Fund LP [2021-03-08] 0.6 2.1
Other Westfield Health Care Fund LP [2021-03-08] 2.5 4.0
Other Westfield Emerging Markets Small Cap Fund LP [2017-06-23] 10.0 11.5
Other Westfield Global Dividend Growth Fund LP [2016-11-15] 2.3 1.2
PE Westfield Capital SPV I LP [2015-10-15] 12.2 0.1
Other Westfield Select Growth Equity LP [2014-03-18] 7.5 35.4
HF Westfield Absolute Return Fund Limited Partnership 2011-12-21 35.7
Westfield Dividend Growth Fund Limited Partnership [2011-12-21] 32.9 12.6
Westfield Large Cap Growth Fund LP 2011-12-21 81.7
HF Westfield Life Sciences Fund II Limited Partnership [2011-12-21] 0.5
View All
AUM Breakdown Accounts AUM ($B)
By Client Type
(a) Individuals (other than high net worth individuals) 274 0.1
(b) Individuals (high net worth individuals) 505 1.3
(c) Banking or thrift institutions 0 0.0
(d) Investment companies 13 7.1
(e) Business development companies 0 0.0
(f) Pooled investment vehicles 15 3.7
(g) Pension and profit sharing plans 61 5.5
(h) Charitable organizations 127 1.4
(i) State or municipal government entities 38 4.2
(j) Other investment advisers 1 0.6
(k) Insurance companies 0 0.0
(l) Sovereign wealth funds and foreign official institutions 0 0.0
(m) Corporations or other businesses not listed above 84 0.4
(n) Other 0 0.0
Total 1,118 24.4
By Discretionary
Discretionary 1,118 24.4
Non-Discretionary 0 0.0
Total 1,118 24.4
By Non-United States Persons
Non-United States Persons 1.8
United States Persons 22.6
Total 1,118 24.4
Form D Directors Role # Filings # Firms 2011 - 2026
William Muggia 9 2
Westfield Partners LLC 6 2
Westfield Capital Management Company LP 5 1
EDGAR Form CIK 2011 - 2026
13F-HR [0001177719]
3 [0001177719]
SC 13G [0001177719]
Form 13D/13G Filer Form 13D/13G Subject Filed
Westfield Capital Management Co LP IMAX Corp [2026-05-05]
Westfield Capital Management Co LP Bicycle Therapeutics PLC [2025-02-11]
Westfield Capital Management Co LP Flywire Corp [2025-02-11]
Westfield Capital Management Co LP Mural Oncology PLC [2024-01-10]
Westfield Capital Management Co LP Ascendis Pharma A/S [2023-02-02]
Westfield Capital Management Co LP Innoviva Inc [2022-02-01]
Westfield Capital Management Co LP Ironwood Pharmaceuticals Inc [2021-01-07]
Westfield Capital Management Co LP Sitime Corp [2020-01-07]
Westfield Capital Management Co LP Medicines Co /DE [2019-02-07]
Westfield Capital Management Co LP PTC Therapeutics Inc [2016-02-10]
View All
Form 3/4/5 Subject 2011 - 2026
Westfield Capital Management Co LP
Liberty All Star Growth Fund Inc
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