SEC-registered independent wealth management RIA
Mason Capital Partners
As of its Form ADV filed March 31, 2026, Mason Capital Partners, an SEC-registered independent wealth management RIA in Boston, Massachusetts, reported $210.6 million in regulatory assets under management across 300 accounts, ranking #191 among independent RIAs in Massachusetts by assets.
Registration
- Registration
- SEC-registered, Approved
- CRD number
- 107412
- SEC file number
- 801-11877
- Registered since
- July 29, 1976
- Latest Form ADV filing
- March 31, 2026
- Legal name
- ALBERT D MASON INC
- Organized as
- Corporation
- Fiscal year ends
- December
- Other offices
- 0
Key figures
- Regulatory assets under management
- $210.6 million
- Discretionary
- $210.6 million (100.0%)
- Non-discretionary
- $0
- Accounts
- 300 (300 discretionary)
- Clients
- 179, approximate as reported
- Employees
- 7
- Advisory staff
- 4 performing investment advisory functions
- Average account
- $702,016
- Asset growth, 1 year
- 4.3% (from $202.0 million a year earlier)
- Asset growth, 3-year annual rate
- 4.7% (from $183.7 million three years earlier)
- Asset growth, 5-year annual rate
- 1.8% (from $192.2 million five years earlier)
- Client growth, 1 year
- 20.9% (from 148)
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 | #5,201 | #191 | $210.6 million |
| Fastest-growing independent RIAs over one year | #6,033 | #223 | 4.3%from $202.0 million |
| Fastest-growing independent RIAs over three years | #4,985 | #193 | 4.7%from $183.7 million |
| Fastest-growing independent RIAs over five years | #4,270 | #172 | 1.8%from $192.2 million |
| Independent RIAs with the biggest asset gains over one year | #6,341 | #228 | $8.6 million |
| Independent RIAs with the most clients | #6,070 | #196 | 179 |
| Independent RIAs with the fastest client growth over one year | #714 | #18 | 20.9%from 148 |
| Independent RIAs with the most accounts | #6,896 | #233 | 300 |
| Independent RIAs with the most advisory staff | #3,365 | #121 | 4 |
| Independent RIAs with the most high net worth clients | #3,251 | #127 | 96 |
Assets over time
Data table
| As of | RAUM |
|---|---|
| October 1, 2010 | $444.9 million |
| October 3, 2011 | $479.3 million |
| October 1, 2012 | $475.7 million |
| October 1, 2013 | $514.9 million |
| October 1, 2014 | $397.9 million |
| October 1, 2015 | $587.6 million |
| October 3, 2016 | $218.0 million |
| October 2, 2017 | $156.2 million |
| October 1, 2018 | $171.2 million |
| October 1, 2019 | $164.6 million |
| October 1, 2020 | $190.3 million |
| October 4, 2021 | $192.2 million |
| October 3, 2022 | $213.8 million |
| October 5, 2023 | $183.7 million |
| October 1, 2024 | $200.5 million |
| September 2, 2025 | $202.0 million |
| October 2, 2026 | $210.6 million |
Clients and services
Client mix
| Measure | Bar | RAUM |
|---|---|---|
| High net worth individuals 96 clients | $122.3 million | |
| Pooled investment vehicles 2 clients | $60.1 million | |
| Individuals (other than high net worth) 81 clients | $19.1 million | |
| Pension and profit sharing plans fewer than 5 clients | $7.1 million | |
| Corporations or other businesses fewer than 5 clients | $2.0 million | |
| Banking or thrift institutions fewer than 5 clients | $0 | |
| Charitable organizations 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
Advisory services
- Portfolio management for individuals or small businesses
- Portfolio management for pooled investment vehicles
- Portfolio management for businesses or institutional clients
Wrap fee program sponsor or portfolio manager: no.
Other business, affiliations and custody
Other business activities (Item 6.A)
None reported.
Financial industry affiliations (Item 7.A)
None reported.
Advises 1 private fund (Item 7.B).
Custody (Item 9)
The firm reported custody of client cash or securities, $210.6 million in total.
Investment adviser representatives
- IARs registered with the firm
- 4
- Also registered through a broker-dealer
- 0
- Employees who are IARs (Form ADV 5.B(3))
- 0
Designations held by the firm's IARs: CFA 2.
0 of the firm's 4 IARs are registered in jurisdictions that require IAR CE. 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 |
|---|---|---|
| Powerhouse Assets LLC | Lincoln | $214.8 million |
| Compass Planning Associates, Inc. | Greenfield | $213.9 million |
| Apex Investment Group | Hudson | $211.1 million |
| Traub Capital Management | Needham | $210.8 million |
| Flying Point Financial, Inc. | North Andover | $206.7 million |
The five independent RIAs nearest in regulatory assets with a main office in the same state.
Elsewhere
- Mason Capital Partners on IAPD: Form ADV, brochures and disclosure detail.
- Firm website: www.mason-capital.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.