Fee-only adviser · Boston, MA
Westfield Capital Management Company, L.P.
Westfield Capital Management Company, L.P. is a fee-only investment adviser registered with the U.S. Securities and Exchange Commission, with its main office in Boston, Massachusetts. On its latest Form ADV, filed July 1, 2026, it reports $29.8B in regulatory assets under management, 8,910 individual clients and 19 employees who give investment advice. It reports no commission compensation, is not registered as a broker-dealer and does not act as an insurance agent.
Key facts from Form ADV
| Registration | SEC-registered |
|---|---|
| Firm CRD number | 146990 · SEC file 801-69413 |
| Office | One Financial Center Boston, MA 02111 |
| Phone | (617) 428-7100 |
| Website | www.westfieldcapital.com |
| Regulatory assets under management | $29.8B |
| Individual clients | 8,398 non-high-net-worth, 512 high-net-worth |
| Financial planning clients | Not reported |
| How it charges | Percentage of assets |
| Services | Portfolio management |
| Employees | 63 |
| Disciplinary disclosures | None reported |
| Latest Form ADV filing | July 1, 2026 |
Source: the firm’s Form ADV Part 1A as published by the SEC’s Investment Adviser Public Disclosure database, data as of November 6, 2026. Figures are self-reported by the firm.
What this means for you
- It charges only as a percentage of the assets it manages. Ask about the fee schedule and any account minimum, which Form ADV Part 1 does not record.
- Most of its individual clients are not high-net-worth, so it is likely to work with people who are still building assets.
- It sponsors or manages a wrap fee program; ask what the bundled fee covers.
- It reports no disciplinary history on Form ADV.
Before you hire any adviser
Read the firm’s Form ADV Part 2 brochure on its SEC record: it sets out fees, minimums, conflicts of interest and who will manage your money. Ask whether the firm acts as a fiduciary for all of your accounts, how it is paid in total, and who holds your assets. Our guide to choosing a financial adviser lists the questions to ask.
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