WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P.
CRD #146990 SEC #801-69413 BOSTON, MA (617) 428-7100
SEC Registered Private Funds
Total AUM
$23.6B
Discretionary
$23.6B
Employees
60
Clients
--
Accounts
975
AUM Over Time
| Date | Total AUM | Discretionary | Non-Disc. | Employees | Clients |
|---|---|---|---|---|---|
| Oct 2025 | $23.6B | $23.6B | $0 | 60 | 12 |
| Apr 2025 | $23.6B | $23.6B | $0 | 60 | 12 |
| Mar 2025 | $23.6B | $23.6B | $0 | 60 | 12 |
| Mar 2025 | $23.6B | $23.6B | $0 | 60 | 12 |
| Sep 2024 | $17.6B | $17.6B | $0 | 59 | 11 |
| Mar 2024 | $17.6B | $17.6B | $0 | 59 | 11 |
| Sep 2023 | $13.3B | $13.3B | $0 | 59 | 11 |
| Jul 2023 | $13.3B | $13.3B | $0 | 59 | 11 |
| Apr 2023 | $13.3B | $13.3B | $0 | 59 | 11 |
| Mar 2023 | $13.3B | $13.3B | $0 | 59 | 11 |
| Nov 2022 | $17B | $17B | $0 | 59 | 11 |
| Aug 2022 | $17B | $17B | $0 | 59 | 11 |
| Jul 2022 | $17B | $17B | $0 | 59 | 11 |
| May 2022 | $17B | $17B | $0 | 59 | 11 |
| Mar 2022 | $17B | $17B | $0 | 59 | 11 |
| Sep 2021 | $17.1B | $17.1B | $0 | 61 | 11 |
| Sep 2021 | $17.1B | $17.1B | $0 | 61 | 11 |
| Mar 2021 | $17.1B | $17.1B | $0 | 61 | 11 |
| Jun 2020 | $14.5B | $14.5B | $0 | 57 | 8 |
| May 2020 | $14.5B | $14.5B | $0 | 57 | 8 |
| Mar 2020 | $14.5B | $14.5B | $0 | 58 | 8 |
| Oct 2019 | $11.9B | $11.9B | $0 | 60 | 6 |
| Sep 2019 | $11.9B | $11.9B | $0 | 60 | 6 |
| Jul 2019 | $11.9B | $11.9B | $0 | 60 | 6 |
| Mar 2019 | $11.9B | $11.9B | $0 | 63 | 6 |
| Oct 2018 | $13.9B | $13.9B | $0 | 63 | 3 |
| Mar 2018 | $13.9B | $13.9B | $0 | 63 | 3 |
| Sep 2017 | $11.8B | $11.8B | $0 | 64 | 1,000 |
| Jun 2017 | $11.8B | $11.8B | $0 | 64 | 1,000 |
| Mar 2017 | $11.8B | $11.8B | $0 | 64 | 1,000 |
| Nov 2016 | $15.4B | $15.4B | $0 | 63 | 1,300 |
| Jul 2016 | $15.4B | $15.4B | $0 | 63 | 1,300 |
| Mar 2016 | $15.4B | $15.4B | $0 | 63 | 1,300 |
| Dec 2015 | $14.9B | $14.9B | $0 | 65 | 1,300 |
| Oct 2015 | $14.9B | $14.9B | $0 | 65 | 1,300 |
| Jul 2015 | $17.5B | $17.5B | $8M | 63 | 1,200 |
| May 2015 | $17.5B | $17.5B | $8M | 63 | 1,200 |
| Mar 2015 | $17.5B | $17.5B | $8M | 63 | 1,200 |
| Oct 2014 | $17.4B | $17.4B | $8M | 61 | 1,200 |
| Aug 2014 | $17.4B | $17.4B | $8M | 58 | 1,200 |
| May 2014 | $17.4B | $17.4B | $8M | 58 | 1,200 |
| Mar 2014 | $17.4B | $17.4B | $8M | 58 | 1,200 |
| Aug 2013 | $15.8B | $15.8B | $7.6M | 61 | 1,200 |
| Jun 2013 | $14.2B | $14.1B | $7.1M | 60 | 1,300 |
| Mar 2013 | $14.2B | $14.2B | $7.1M | 61 | 1,300 |
| Jan 2013 | $15.9B | $15.9B | $7.2M | 59 | 1,900 |
| May 2012 | $15.9B | $15.9B | $7.2M | 51 | 1,900 |
| Mar 2012 | $14.2B | $14.2B | $6.9M | 51 | 1,900 |
| Dec 2011 | $15.1B | $15.1B | $7.5M | 51 | 2,300 |
| Aug 2011 | $15.1B | $15.1B | $7.5M | 51 | -- |
| Mar 2011 | $15.1B | $15.1B | $7.5M | 51 | -- |
| May 2010 | $12.3B | $12.3B | $7.6M | 51 | -- |
| Oct 2009 | $8.8B | $8.8B | $6.6M | 51 | -- |
| Jul 2009 | $8.8B | $8.8B | $6.6M | 51 | -- |
| Apr 2009 | $8.8B | $8.8B | $6.6M | 51 | -- |
DateOct 2025
Total AUM$23.6B
Discretionary$23.6B
Non-Disc.$0
Employees60
Clients12
DateApr 2025
Total AUM$23.6B
Discretionary$23.6B
Non-Disc.$0
Employees60
Clients12
DateMar 2025
Total AUM$23.6B
Discretionary$23.6B
Non-Disc.$0
Employees60
Clients12
DateMar 2025
Total AUM$23.6B
Discretionary$23.6B
Non-Disc.$0
Employees60
Clients12
DateSep 2024
Total AUM$17.6B
Discretionary$17.6B
Non-Disc.$0
Employees59
Clients11
DateMar 2024
Total AUM$17.6B
Discretionary$17.6B
Non-Disc.$0
Employees59
Clients11
DateSep 2023
Total AUM$13.3B
Discretionary$13.3B
Non-Disc.$0
Employees59
Clients11
DateJul 2023
Total AUM$13.3B
Discretionary$13.3B
Non-Disc.$0
Employees59
Clients11
DateApr 2023
Total AUM$13.3B
Discretionary$13.3B
Non-Disc.$0
Employees59
Clients11
DateMar 2023
Total AUM$13.3B
Discretionary$13.3B
Non-Disc.$0
Employees59
Clients11
DateNov 2022
Total AUM$17B
Discretionary$17B
Non-Disc.$0
Employees59
Clients11
DateAug 2022
Total AUM$17B
Discretionary$17B
Non-Disc.$0
Employees59
Clients11
DateJul 2022
Total AUM$17B
Discretionary$17B
Non-Disc.$0
Employees59
Clients11
DateMay 2022
Total AUM$17B
Discretionary$17B
Non-Disc.$0
Employees59
Clients11
DateMar 2022
Total AUM$17B
Discretionary$17B
Non-Disc.$0
Employees59
Clients11
DateSep 2021
Total AUM$17.1B
Discretionary$17.1B
Non-Disc.$0
Employees61
Clients11
DateSep 2021
Total AUM$17.1B
Discretionary$17.1B
Non-Disc.$0
Employees61
Clients11
DateMar 2021
Total AUM$17.1B
Discretionary$17.1B
Non-Disc.$0
Employees61
Clients11
DateJun 2020
Total AUM$14.5B
Discretionary$14.5B
Non-Disc.$0
Employees57
Clients8
DateMay 2020
Total AUM$14.5B
Discretionary$14.5B
Non-Disc.$0
Employees57
Clients8
DateMar 2020
Total AUM$14.5B
Discretionary$14.5B
Non-Disc.$0
Employees58
Clients8
DateOct 2019
Total AUM$11.9B
Discretionary$11.9B
Non-Disc.$0
Employees60
Clients6
DateSep 2019
Total AUM$11.9B
Discretionary$11.9B
Non-Disc.$0
Employees60
Clients6
DateJul 2019
Total AUM$11.9B
Discretionary$11.9B
Non-Disc.$0
Employees60
Clients6
DateMar 2019
Total AUM$11.9B
Discretionary$11.9B
Non-Disc.$0
Employees63
Clients6
DateOct 2018
Total AUM$13.9B
Discretionary$13.9B
Non-Disc.$0
Employees63
Clients3
DateMar 2018
Total AUM$13.9B
Discretionary$13.9B
Non-Disc.$0
Employees63
Clients3
DateSep 2017
Total AUM$11.8B
Discretionary$11.8B
Non-Disc.$0
Employees64
Clients1,000
DateJun 2017
Total AUM$11.8B
Discretionary$11.8B
Non-Disc.$0
Employees64
Clients1,000
DateMar 2017
Total AUM$11.8B
Discretionary$11.8B
Non-Disc.$0
Employees64
Clients1,000
DateNov 2016
Total AUM$15.4B
Discretionary$15.4B
Non-Disc.$0
Employees63
Clients1,300
DateJul 2016
Total AUM$15.4B
Discretionary$15.4B
Non-Disc.$0
Employees63
Clients1,300
DateMar 2016
Total AUM$15.4B
Discretionary$15.4B
Non-Disc.$0
Employees63
Clients1,300
DateDec 2015
Total AUM$14.9B
Discretionary$14.9B
Non-Disc.$0
Employees65
Clients1,300
DateOct 2015
Total AUM$14.9B
Discretionary$14.9B
Non-Disc.$0
Employees65
Clients1,300
DateJul 2015
Total AUM$17.5B
Discretionary$17.5B
Non-Disc.$8M
Employees63
Clients1,200
DateMay 2015
Total AUM$17.5B
Discretionary$17.5B
Non-Disc.$8M
Employees63
Clients1,200
DateMar 2015
Total AUM$17.5B
Discretionary$17.5B
Non-Disc.$8M
Employees63
Clients1,200
DateOct 2014
Total AUM$17.4B
Discretionary$17.4B
Non-Disc.$8M
Employees61
Clients1,200
DateAug 2014
Total AUM$17.4B
Discretionary$17.4B
Non-Disc.$8M
Employees58
Clients1,200
DateMay 2014
Total AUM$17.4B
Discretionary$17.4B
Non-Disc.$8M
Employees58
Clients1,200
DateMar 2014
Total AUM$17.4B
Discretionary$17.4B
Non-Disc.$8M
Employees58
Clients1,200
DateAug 2013
Total AUM$15.8B
Discretionary$15.8B
Non-Disc.$7.6M
Employees61
Clients1,200
DateJun 2013
Total AUM$14.2B
Discretionary$14.1B
Non-Disc.$7.1M
Employees60
Clients1,300
DateMar 2013
Total AUM$14.2B
Discretionary$14.2B
Non-Disc.$7.1M
Employees61
Clients1,300
DateJan 2013
Total AUM$15.9B
Discretionary$15.9B
Non-Disc.$7.2M
Employees59
Clients1,900
DateMay 2012
Total AUM$15.9B
Discretionary$15.9B
Non-Disc.$7.2M
Employees51
Clients1,900
DateMar 2012
Total AUM$14.2B
Discretionary$14.2B
Non-Disc.$6.9M
Employees51
Clients1,900
DateDec 2011
Total AUM$15.1B
Discretionary$15.1B
Non-Disc.$7.5M
Employees51
Clients2,300
DateAug 2011
Total AUM$15.1B
Discretionary$15.1B
Non-Disc.$7.5M
Employees51
Clients--
DateMar 2011
Total AUM$15.1B
Discretionary$15.1B
Non-Disc.$7.5M
Employees51
Clients--
DateMay 2010
Total AUM$12.3B
Discretionary$12.3B
Non-Disc.$7.6M
Employees51
Clients--
DateOct 2009
Total AUM$8.8B
Discretionary$8.8B
Non-Disc.$6.6M
Employees51
Clients--
DateJul 2009
Total AUM$8.8B
Discretionary$8.8B
Non-Disc.$6.6M
Employees51
Clients--
DateApr 2009
Total AUM$8.8B
Discretionary$8.8B
Non-Disc.$6.6M
Employees51
Clients--