SEC-registered independent wealth management RIA
Winthrop Wealth
As of its Form ADV filed September 30, 2026, Winthrop Wealth, an SEC-registered independent wealth management RIA in Boston, Massachusetts, reported $3.1 billion in regulatory assets under management across 4,369 accounts, ranking #27 among independent RIAs in Massachusetts by assets.
Registration
- Registration
- SEC-registered, Approved
- CRD number
- 288178
- SEC file number
- 801-110461
- Registered since
- April 28, 2017
- Latest Form ADV filing
- September 30, 2026
- Legal name
- WINTHROP ADVISORY GROUP, LLC
- Organized as
- Limited Liability Company
- Fiscal year ends
- December
- Other offices
- 18
Key figures
- Regulatory assets under management
- $3.1 billion
- Discretionary
- $3.1 billion (99.1%)
- Non-discretionary
- $26.9 million
- Accounts
- 4,369 (4,350 discretionary)
- Clients
- 2,513, approximate as reported
- Employees
- 40
- Advisory staff
- 27 performing investment advisory functions
- Average account
- $709,856
- Asset growth, 1 year
- 19.2% (from $2.6 billion a year earlier)
- Asset growth, 3-year annual rate
- 19.2% (from $1.8 billion three years earlier)
- Asset growth, 5-year annual rate
- 14.8% (from $1.6 billion five years earlier)
- Client growth, 1 year
- 16.9% (from 2,149)
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 | #366 | #27 | $3.1 billion |
| Fastest-growing independent RIAs over one year | #2,533 | #74 | 19.2%from $2.6 billion |
| Fastest-growing independent RIAs over three years | #1,798 | #51 | 19.2%from $1.8 billion |
| Fastest-growing independent RIAs over five years | #1,283 | #43 | 14.8%from $1.6 billion |
| Independent RIAs with the biggest asset gains over one year | #409 | #21 | $500.5 million |
| Independent RIAs with the most clients | #344 | #14 | 2,513 |
| Independent RIAs with the fastest client growth over one year | #870 | #23 | 16.9%from 2,149 |
| Independent RIAs with the most accounts | #403 | #12 | 4,369 |
| Independent RIAs with the most advisory staff | #347 | #15 | 27 |
| Independent RIAs with the most high net worth clients | #272 | #11 | 743 |
| Independent RIAs with the most CFP professionals | #233 | #10 | 12 |
Assets over time
Data table
| As of | RAUM |
|---|---|
| October 2, 2017 | $1.0 billion |
| October 1, 2018 | $1.1 billion |
| October 1, 2019 | $1.1 billion |
| October 1, 2020 | $1.3 billion |
| October 4, 2021 | $1.6 billion |
| October 3, 2022 | $1.9 billion |
| October 5, 2023 | $1.8 billion |
| October 1, 2024 | $2.2 billion |
| September 2, 2025 | $2.6 billion |
| October 2, 2026 | $3.1 billion |
Clients and services
Client mix
| Measure | Bar | RAUM |
|---|---|---|
| High net worth individuals 743 clients | $2.5 billion | |
| Individuals (other than high net worth) 1,662 clients | $440.0 million | |
| Corporations or other businesses 37 clients | $91.9 million | |
| Pension and profit sharing plans 20 clients | $51.5 million | |
| Charitable organizations 19 clients | $23.9 million | |
| Banking or thrift institutions fewer than 5 clients | $0 | |
| State or municipal government entities fewer than 5 clients | $0 | |
| Other investment advisers fewer than 5 clients | $0 | |
| Insurance companies fewer than 5 clients | $0 | |
| Sovereign wealth funds and foreign official institutions fewer than 5 clients | $0 |
How the firm is paid
- A percentage of assets under management
- Hourly charges
- Fixed fees
- Other
Advisory services
- Financial planning
- Portfolio management for individuals or small businesses
- Portfolio management for businesses or institutional clients
- Pension consulting
- Selection of other advisers
Financial planning clients (Item 5.H): 101-250.
Wrap fee program sponsor or portfolio manager: yes.
Other business, affiliations and custody
Other business activities (Item 6.A)
None reported.
Financial industry affiliations (Item 7.A)
- Accountant or accounting firm
- Real estate broker, dealer or agent
Custody (Item 9)
The firm reported custody of client cash or securities, $1.4 billion in total.
Investment adviser representatives
- IARs registered with the firm
- 28
- Also registered through a broker-dealer
- 0
- Employees who are IARs (Form ADV 5.B(3))
- 27
Designations held by the firm's IARs: CFP 12, CFA 4, ChFC 4.
Between 2 and 3 of the firm's 28 IARs are registered in jurisdictions that require IAR CE. The source counts registrations by jurisdiction, and many IARs are registered in more than one, so the exact number is not knowable from it. 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 |
|---|---|---|
| Flagship Harbor Advisors, LLC | Boston | $3.4 billion |
| Northeast Investment Management Inc | Boston | $3.3 billion |
| Birch Hill Investment Advisors LLC | Boston | $2.9 billion |
| Windrose Advisors LLC | Waltham | $2.7 billion |
| The Patriot Financial Group, LLC | Walpole | $2.6 billion |
The five independent RIAs nearest in regulatory assets with a main office in the same state.
Elsewhere
- Winthrop Wealth on IAPD: Form ADV, brochures and disclosure detail.
- Firm website: www.winthropwealth.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.