SEC-registered independent wealth management RIA
Foster Dykema Cabot & Partners, LLC
As of its Form ADV filed March 27, 2026, Foster Dykema Cabot & Partners, LLC, an SEC-registered independent wealth management RIA in Waltham, Massachusetts, reported $2.2 billion in regulatory assets under management across 855 accounts, ranking #35 among independent RIAs in Massachusetts by assets.
Registration
- Registration
- SEC-registered, Approved
- CRD number
- 300282
- SEC file number
- 801-114693
- Registered since
- February 12, 2019
- Latest Form ADV filing
- March 27, 2026
- Organized as
- Limited Liability Company
- Fiscal year ends
- December
- Other offices
- 0
Key figures
- Regulatory assets under management
- $2.2 billion
- Discretionary
- $2.2 billion (100.0%)
- Non-discretionary
- $0
- Accounts
- 855 (855 discretionary)
- Clients
- 851, approximate as reported
- Employees
- 21
- Advisory staff
- 8 performing investment advisory functions
- Average account
- $2.6 million
- Asset growth, 1 year
- 11.4% (from $2.0 billion a year earlier)
- Asset growth, 3-year annual rate
- 12.9% (from $1.5 billion three years earlier)
- Asset growth, 5-year annual rate
- 8.0% (from $1.5 billion five years earlier)
- Client growth, 1 year
- 4.8% (from 812)
Independent wealth management RIA: individual and high net worth clients hold at least half of its regulatory assets, it offers financial planning or portfolio management for individuals, and it is not a broker-dealer, a bank or part of one by the directory's rules. How firms are classed.
Growth rates come from the SEC's yearly snapshots and are left blank when the years are not comparable.
Rankings
Among independent wealth management RIAs.
| Ranking | Nationally | In Massachusetts | Value |
|---|---|---|---|
| Largest independent RIAs by assets under management | #543 | #35 | $2.2 billion |
| Fastest-growing independent RIAs over one year | #4,728 | #165 | 11.4%from $2.0 billion |
| Fastest-growing independent RIAs over three years | #3,490 | #121 | 12.9%from $1.5 billion |
| Fastest-growing independent RIAs over five years | #3,053 | #115 | 8.0%from $1.5 billion |
| Independent RIAs with the biggest asset gains over one year | #931 | #43 | $228.0 million |
| Independent RIAs with the most clients | #1,201 | #36 | 851 |
| Independent RIAs with the fastest client growth over one year | #2,687 | #83 | 4.8%from 812 |
| Independent RIAs with the most accounts | #3,043 | #84 | 855 |
| Independent RIAs with the most advisory staff | #1,478 | #54 | 8 |
| Independent RIAs with the most high net worth clients | #287 | #13 | 718 |
Assets over time
Data table
| As of | RAUM |
|---|---|
| October 1, 2019 | $1.4 billion |
| October 1, 2020 | $1.5 billion |
| October 4, 2021 | $1.5 billion |
| October 3, 2022 | $1.7 billion |
| October 5, 2023 | $1.5 billion |
| October 1, 2024 | $1.7 billion |
| September 2, 2025 | $2.0 billion |
| October 2, 2026 | $2.2 billion |
Clients and services
Client mix
| Measure | Bar | RAUM |
|---|---|---|
| High net worth individuals 718 clients | $1.9 billion | |
| Corporations or other businesses 32 clients | $154.1 million | |
| Pooled investment vehicles 8 clients | $111.0 million | |
| Charitable organizations 15 clients | $57.2 million | |
| Individuals (other than high net worth) 78 clients | $26.2 million | |
| Pension and profit sharing plans fewer than 5 clients | $8.9 million |
How the firm is paid
- A percentage of assets under management
- Fixed fees
Advisory services
- Financial planning
- Portfolio management for individuals or small businesses
- Portfolio management for pooled investment vehicles
- Portfolio management for businesses or institutional clients
- Selection of other advisers
- Other
Financial planning clients (Item 5.H): 1-10.
Wrap fee program sponsor or portfolio manager: no.
Other business, affiliations and custody
Other business activities (Item 6.A)
- Other financial products
Financial industry affiliations (Item 7.A)
- Broker-dealer
- Other investment adviser
- Commodity pool operator or commodity trading advisor
- Futures commission merchant
- Accountant or accounting firm
- Lawyer or law firm
- Insurance company or agency
- Pension consultant
- Real estate broker, dealer or agent
- Sponsor or syndicator of limited partnerships
- Sponsor, general partner or managing member of pooled investment vehicles
Advises 8 private funds (Item 7.B).
Custody (Item 9)
The firm reported custody of client cash or securities, $2.2 billion in total.
Investment adviser representatives
- IARs registered with the firm
- 0
- Also registered through a broker-dealer
- 0
- Employees who are IARs (Form ADV 5.B(3))
- 0
IAR registrations by jurisdiction are not available for this firm. IAR CE requirements by state.
Counts only. AdvisorIQ does not list individual people.
Disclosures
On Form ADV Item 11 the firm answered yes to 0 disclosure questions. See the detail on IAPD.
Succession and acquired firms
On Form ADV Item 4 the firm did not report succeeding to another adviser's business.
Similar-sized firms in Massachusetts
| Firm | City | RAUM |
|---|---|---|
| Nichols & Pratt Advisers LLP | Boston | $2.4 billion |
| Moody, Lynn, Lieberson & Walker, LLC | Boston | $2.4 billion |
| Baldwin Wealth Partners, LLC | Marion | $2.3 billion |
| Minot Deblois Advisors LLC | Boston | $2.0 billion |
| Boston Family Office LLC | Boston | $2.0 billion |
The five independent RIAs nearest in regulatory assets with a main office in the same state.
Elsewhere
- Foster Dykema Cabot & Partners, LLC on IAPD: Form ADV, brochures and disclosure detail.
- Firm website: www.fdcco.com
- Independent RIAs in Massachusetts
Firm data as of October 2, 2026, from ia100226.zip. Figures are as the firm reported them; corrections are made on Form ADV and appear after the next monthly reload.
Data as of October 2, 2026, from Form ADV. Sources: SEC registered adviser data (ia100226.zip) and IAPD compilation reports. How the directory is built.