Mason Investment Advisory Services INC

Public-record details

Address

11921 Freedom Drive, Suite 1000, Reston, VA 20190

Phone

(703) 716-6000

Listed under

Financial planning, Flat / fixed fees, % of assets managed

CRD number

111113

Registration

SEC registered since 1982-12-20

Compensation (Form ADV 5.E)

Percentage of assets under management; Fixed fees

Commissions

None reported (Form ADV Item 5.E)

Services (Form ADV 5.G)

Financial planning; Portfolio management for individuals/small businesses; Selection of other advisers

Regulatory assets under management

$15.7 billion

Accounts managed

1,147

Clients reported (Form ADV 5.D)

1,147

Individual / high-net-worth clients

304 / 759

Employees

72

Other business activities (Form ADV 6.A)

None reported

Disclosures reported on Form ADV

Yes — see IAPD for details

Latest Form ADV filing

2026-03-27

SEC registered investment adviser, CRD 111113, per the SEC IAPD compilation report of 2026-09-29. Source: SEC Investment Adviser Public Disclosure (IAPD) (record). Data as of 2026-09-30.

Read the official record

• SEC IAPD summary for CRD 111113 — registration, Form ADV, the Part 2 brochure (fees, conflicts, minimums), and details of the disclosures reported on Form ADV.
• FINRA BrokerCheck — look up the individual advisers at this firm.
• Firm website (as listed on Form ADV)

Figures are what the firm reported on Form ADV Part 1A. “No commissions reported” means the firm did not check commissions as a form of compensation in Item 5.E; check Item 6.A activities and the Part 2 brochure for other conflicts. A “Yes” for disclosures is a public-record fact from Form ADV Item 11; it can relate to the firm or its advisory affiliates, can be old, and does not by itself describe the outcome. We do not rate or rank advisers.