Mount Vernon Associates provides portfolio management for individuals and small businesses and portfolio management for institutions.
Mount Vernon Associates reports 72 clients. They include 39 high-net-worth individuals, 23 individual clients and 8 charitable organizations. Of its assets, 100.0% ($233M across 121 accounts) are managed with discretion.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 32% | 4% |
| High-net-worth individuals | 54% | 63% |
| Pension and profit-sharing plans | 3% | 23% |
| Charitable organizations | 11% | 9% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 23 | $9.84M | 4.2% | $428K |
| High-net-worth individuals | 39 | $147M | 63.4% | $3.78M |
| Pension and profit-sharing plans | Fewer than 5 | $53.8M | 23.2% | $26.9M |
| Charitable organizations | 8 | $21.4M | 9.2% | $2.68M |
| Total | 72 | $233M | 100% | — |
- Clients
- 23
- Regulatory AUM
- $9.84M
- AUM share
- 4.2%
- Avg. per client
- $428K
- Clients
- 39
- Regulatory AUM
- $147M
- AUM share
- 63.4%
- Avg. per client
- $3.78M
- Clients
- Fewer than 5
- Regulatory AUM
- $53.8M
- AUM share
- 23.2%
- Avg. per client
- $26.9M
- Clients
- 8
- Regulatory AUM
- $21.4M
- AUM share
- 9.2%
- Avg. per client
- $2.68M
Total
- Clients
- 72
- Regulatory AUM
- $233M
- AUM share
- 100%
- Avg. per client
- —
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 0
- Private funds advised
- 0
Mount Vernon Associates is paid through a percentage of assets under management. The reviewed brochures do not disclose an asset-based fee rate. Read the SEC-filed brochure.
Mark Sullivan owns 50% to 75% of Mount Vernon Associates. The leadership team of Mount Vernon Associates includes President Nancy O'Hara. It has 3 employees, 2 of them in advisory roles.
Leadership
- Nancy O'HaraVice President/Chief Compliance Officer/Treasurer
- Mark SullivanPresident
Investment adviser representatives
1 representatives listed in the SEC register as of 9 October 2026.
Staff
- 3 employees
- 2 in advisory functions
- 1 state-registered rep
- Owns 50% to 75% of Mount Vernon Associates Inc
Mark Sullivan
Control person · since December 2010
- Owns 25% to 50% of Mount Vernon Associates Inc
Nancy O'Hara
Control person · since February 2008
Mount Vernon Associates’ regulatory assets grew from $205M (February 2021) to $233M (February 2026); clients rose from 61 to 72 and employees were 3 in both filings.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | StaffEmployees | Offices |
|---|---|---|---|---|
| Feb 2026February 2026 | $233M | 72 | 3 | 1 |
| Feb 2025February 2025 | $234M | 74 | 3 | 1 |
| Feb 2024February 2024 | $195M | 71 | 3 | 1 |
| Jan 2023January 2023 | $160M | 70 | 3 | 1 |
| Mar 2022March 2022 | $232M | 69 | 3 | 1 |
| Feb 2021February 2021 | $205M | 61 | 3 | 1 |
Besides its headquarters, Mount Vernon Associates has 0 offices, with 1 listed address in 1 state.
Maryland · 1 listed address
- 575 S Charles Street, Ste 401, BaltimoreHQ
Contact and registration details
- Legal name
- Mount Vernon Associates Inc
- Headquarters
- 575 S Charles Street, Ste 401, Baltimore, MD 21201
- Website
- mtvernonassoc.com
- Phone
- 410-377-9780
- SEC file
- 801-26821
- Structure
- Maryland corporation
- Fiscal year end
- December
Mount Vernon Associates’ named custodians for separately managed accounts are Charles Schwab ($172M, 84%) and Bank of Labor ($32.1M, 16%). Mount Vernon Associates does not have custody of client assets.
- Charles SchwabCharles Schwab & Co., Inc. · West Lake, TX · $172M84%
- Bank of LaborBank of Labor · Overland Park, KS · $32.1M16%
At year end, Mount Vernon Associates’ separately managed accounts were mostly in stocks (67%) and bonds (26%). Its reported 13F holdings for the quarter ended 30 June 2026 total $153K across 62 positions; the largest are Apple Inc.. (10.6%), Alphabet Inc.. CL C (8.6%) and Amazon.com Inc.. (6.3%).
What the accounts hold
- Stocks67%
- Bonds26%
- Investment grade corporate bonds14%
- High-yield corporate bonds8%
- U.S. government and agency bonds4%
- Cash4%
- Other3%
- Mutual funds, warrants3%
Reported 13F holdings
- $153K
- Reported 13F value
- 62
- Positions
- 56.9%
- In the 10 largest
- +8.4%
- Value vs. prior quarter
- Apple Inc..10.6%
- Alphabet Inc.. CL C8.6%
- Amazon.com Inc..6.3%
- Costco Wholesale Corp.5.6%
- Microsoft Corporation5.3%
- J.p. Morgan Chase & Co Chase &4.9%
- Meta Platforms, Inc.4.6%
- Intel Corporation4.2%
- American Express Co.4.0%
- Cisco Systems Inc..2.9%
Together, the ten largest are 56.9% of reported value.
How many clients does Mount Vernon Associates have?
Mount Vernon Associates has 72 clients and manages $233 million for them, as of February 2026. They include 39 high-net-worth individuals, 23 individual clients and 8 charitable organizations.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 18 February 2026
What services does Mount Vernon Associates offer?
Mount Vernon Associates provides portfolio management for individuals and small businesses and portfolio management for institutions.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does Mount Vernon Associates use?
Mount Vernon Associates’ separately managed account assets are held at Charles Schwab & Co., Inc. (West Lake, TX), with $172M and Bank of Labor (Overland Park, KS), with $32.1M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 18 February 2026
How many financial advisors does Mount Vernon Associates have?
Mount Vernon Associates has 1 investment adviser representative registered with state securities authorities, out of 3 employees, and 2 perform investment advisory functions. None are registered representatives of a broker-dealer or licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does Mount Vernon Associates invest in?
At the end of its last fiscal year, Mount Vernon Associates’ separately managed accounts held 67% exchange-traded equities, 14% investment grade corporate bonds, 8% high-yield corporate bonds, 4% U.S. government and agency bonds, 4% cash and equivalents and 3% other. The 3% other category is described as: Mutual Funds, Warrants.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Mount Vernon Associates?
Mount Vernon Associates’ direct owners are Mark Sullivan (50% to 75%) and Nancy O'Hara (25% to 50%).
Source: Form ADV Part 1A, Schedules A and B, filed 18 February 2026
How does Mount Vernon Associates get paid?
Mount Vernon Associates is paid through a percentage of assets under management. Its Form ADV lists no commissions or performance-based fees among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file
How do I contact Mount Vernon Associates?
Mount Vernon Associates’ main office is at 575 S Charles Street, Ste 401, Baltimore, MD 21201. Its phone number is 410-377-9780. Its website is mtvernonassoc.com.