SourcingSourcing

WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P.

C30
CRD 146990·SEC 801-69413·BOSTON, MA
AUM
$24.40B
$1B+
Est. Revenue
$244.0M
@ 1% on AUM
Est. EBITDA
$73.2M
@ 30% margin
Est. Deal Value
$585.7M
@ 8× EBITDA

Identity

Registrations & legal identity

Legal name
WESTFIELD CAPITAL MANAGEMENT COMPANY, L.P.
CRD
146990
SEC file #
801-69413
EIN
813225800
DBA names
—

Economics

AUM
$24.40B
AUM band
$1B+
AUM trajectory
'20'26
$11.86B → $24.40B▲ +106%
Client mix
Individuals High Net Worth505
Individuals Other274
Charitable Organizations127
Corporations84
Pension Profit Sharing Plans61

Operations

Employees (total)
61
Advisory staff (per ADV)
17
Advisory staff (5-yr trend)
'20'26
18 advisors → 17 advisors▼ -6%
Primary office
BOSTON MA
Branches
—

Custodian & Brokerage

Primary custodian
Morgan Stanleylow confidence
Services offered
Portfolio mgmt — individualsPortfolio mgmt — investment companiesPortfolio mgmt — pooled vehiclesPortfolio mgmt — businesses
Fee basis
% of AUMPerformance-based fees

Filings

Latest ADV filing
03/11/2026
ADV-W filed at
—
Website
westfieldcapital.com

Compliance

Disclosures (firm)
0
Trademark
—
Additional signalsExpand ▾

Ownership & succession ★

Who controls the firm + pre-computed succession flags

Top Owner Name
WMS MANAGEMENT LLC
Top Owner Pct
87.5
Top Owner Entity Kind
DE
Owner Count
7
Control Persons
WMS MANAGEMENT LLC
MG AM HOLDING, INC.
Solo Advisor Indicator
No
Succession Risk Solo Owner
No
Is Parent Owned Subsidiary
Yes

Availability / M&A ★

Already-acquired = skip; deal comps

Adv W Filed
No

Web presence ★

Stale website = winding down

Web Signal Quality
ok
Rdap Domain
WESTFIELDCAPITAL.COM
Rdap Domain Creation Date
1999-07-09T05:03:54Z
Rdap Firm Age Years
27
Rdap Firm Age Band
20+y
Rdap Registrar
Network Solutions, LLC

Retirement-plan book (Form 5500) ★

401(k)/plan business — cross-sell value

Retirement Plan Book
No

SEC EDGAR

Edgar Cik
0001686960
Edgar Registered
Yes
Edgar Filing Count
2
Edgar First Filing Date
2016-10-18
Edgar Last Filing Date
2017-10-16
Edgar Form D Count
2
Edgar Form D Offerings
2017-10-162017-10-16 · 0001140361-17-038758
2016-10-182016-10-18 · 0001140361-16-082995

Compliance & brand

Firm Registration Status
active

All other collected signals (17)

Everything else we've pulled for this record, not yet curated into a section.

Adv W Recently Filed
No
Bc Firm Active Bc Count
0
Bc Firm Active IA Count
1
Bc Firm IAR Count
1
Custodian Candidates
Full
Morgan Stanley10
State Street4
Jpmorgan4
E*trade4
Goldman Sachs2
Edgar Addresses
Mailing
ONE FINANCIAL CENTER23RD FLOORBOSTON, MA 02111
Business
ONE FINANCIAL CENTER23RD FLOORBOSTON, MA 02111
Edgar EIN
813225800
Edgar Recent Filings
D/A2017-10-16 · 0001140361-17-038758
D2016-10-18 · 0001140361-16-082995
Fee Schedule
Bracket I98
Bracket Xi2
Bracket Ii0
Bracket Iii0
Bracket Iv0
Firm Has Custody
Yes
Mailing Office Differs
No
Rdap Domain Expiration Date
2034-07-09T05:03:54Z
Rdap Domain Last Changed
2024-07-09T05:12:48Z
Rdap Nameservers
Austin.ns.cloudflare.comTori.ns.cloudflare.com
Rdap Secure Dns Enabled
No
Rdap Status
Client Transfer Prohibited
Trust Company Affiliate
No

People (4)

4
MUGGIA, WILLIAM, ALBERT
IAR · Executive Officer · 2.5%
1282700
KEARNEY, KATHRYN, ANN
Executive Officer · 2.5%
5852702
LEE, RICHARD, DAILYONG
Executive Officer · 2.5%
2529563
MONTGOMERY, JOHN, MORGEN
Executive Officer · 2.5%
2369945