Mount Vernon Associates Inc
- Regulatory AUM
- $233M
- Discretionary
- $233M
- Clients
- 72
- Avg AUM / client
- $3.2M
- Accounts
- 121
- Employees
- 3
AUM over time
Annual snapshots from Form ADV filings · as of Feb 18, 2026
Investments (13F portfolio — 60 positions, $141,542)
13F period Mar 31, 2026| # | Issuer | Class | Value | Shares | % of 13F | % of AUM |
|---|---|---|---|---|---|---|
| 1 | Apple Inc. | com | $14,803 | 58,329 | 10.5% | 0.01% |
| 2 | Alphabet Inc. Cl C | com | $11,450 | 39,916 | 8.09% | 0.0% |
| 3 | Costco Wholesale Corp | com | $9,682 | 9,717 | 6.84% | 0.0% |
| 4 | Amazon.Com Inc. | com | $8,894 | 42,705 | 6.28% | 0.0% |
| 5 | Microsoft Corporation | com | $8,427 | 22,765 | 5.95% | 0.0% |
| 6 | Meta Platforms, Inc | com | $7,506 | 13,119 | 5.3% | 0.0% |
| 7 | J.P. Morgan Chase & Co Chase & | com | $7,249 | 24,644 | 5.12% | 0.0% |
| 8 | American Express Co. | com | $5,727 | 18,932 | 4.05% | 0.0% |
| 9 | Netflix Inc. | com | $4,115 | 42,800 | 2.91% | 0.0% |
| 10 | Bank Of America Corp | com | $4,052 | 83,119 | 2.86% | 0.0% |
| 11 | Spotify Technology S.A. | com | $3,462 | 7,140 | 2.45% | 0.0% |
| 12 | Ge Aerospace | com | $3,259 | 11,483 | 2.3% | 0.0% |
| 13 | Cisco Systems Inc. | com | $3,185 | 41,054 | 2.25% | 0.0% |
| 14 | Tractor Supply Co. | com | $3,038 | 67,070 | 2.15% | 0.0% |
| 15 | Uber Technologies, Inc. | com | $2,838 | 39,460 | 2.01% | 0.0% |
| 16 | Schwab (Charles) Corp | com | $2,801 | 29,800 | 1.98% | 0.0% |
| 17 | Delta Air Lines, Inc. | com | $2,639 | 39,700 | 1.86% | 0.0% |
| 18 | Honeywell Intl Inc | com | $2,606 | 11,529 | 1.84% | 0.0% |
| 19 | Ppl Corporation | com | $2,489 | 65,150 | 1.76% | 0.0% |
| 20 | Intel Corporation | com | $2,207 | 50,011 | 1.56% | 0.0% |
| 21 | Tesla Motors Inc. | com | $2,099 | 5,645 | 1.48% | 0.0% |
| 22 | Texas Instruments, Inc. | com | $1,996 | 10,280 | 1.41% | 0.0% |
| 23 | Affirm Holdings, Inc. | com | $1,992 | 43,475 | 1.41% | 0.0% |
| 24 | Bristol Myers Squibb Co. | com | $1,936 | 31,929 | 1.37% | 0.0% |
| 25 | Starbucks Corporation | com | $1,882 | 21,002 | 1.33% | 0.0% |
Top 25 of 60 positions from the manager's latest Form 13F · source filing (EDGAR) ↗. 13F covers long US-listed positions only. "% of AUM" is share of the firm's total regulatory AUM (Form ADV Item 5.F).
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Individuals (non-high net worth) | 23 | $9.8M | 4.23% |
| High net worth individuals | 39 | $147M | 63.4% |
| Pension and profit sharing plans | 2 | $53.8M | 23.2% |
| Charitable organizations | 8 | $21.4M | 9.22% |
Retirement plan clients
Plans that reported this firm as an investment service provider on Form 5500 Schedule C.
| Plan | Location | Plan year |
|---|---|---|
| Operative Plasterers & Cement Masons Officers & Employees Pension Fund Operative Plasterers & Cement Masons Off & Emp Pension Fund Trste | 2024 | |
| Uiu Newspaper Guild Of Greater Philadelphia Pension Fund Uiu Newspaper Guild Of Greater Philadelphia Pension Fund | 2024 |
People (3)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Mark Carlson Sullivan | President | Mar 1994 (32y) | 50% – 75% | |
| O'hara, Nancy, Van Dyke | Vice President/Chief Compliance Officer/Treasurer | Feb 2008 (19y) | 25% – 50% | |
| Cain, Silas, Winfield | Chairman | Dec 2010 (16y) | Less than 5% |
Undisclosed: 0% – 25% of the firm is not attributable from the filed Schedule A bands.
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Retirement plans served (2)
| Plan | Sponsor | Participants | Plan assets | As of |
|---|---|---|---|---|
| Operative Plasterers & Cement Masons Officers & Employees Pension Fund | Operative Plasterers & Cement Masons Off & Emp Pension Fund Trste | 325 | $109M | 01/01/2024 |
| Uiu Newspaper Guild Of Greater Philadelphia Pension Fund | Uiu Newspaper Guild Of Greater Philadelphia Pension Fund | 35 | $335M | 01/01/2024 |
From Form 5500 service-provider disclosures.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 02/18/2026 | 892 KB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
Services
- • Portfolio management for individuals/small businesses
- • Portfolio management for businesses/institutional clients
Custody
Reported custodians
- Charles Schwab & Co. $172M (74% of AUM) Feb 2026
- Pnc Financial Services Group, Inc. $39.6M (17% of AUM) Feb 2025
- Bank Of Labor $32.1M (14% of AUM) Feb 2026
- Wilmington Trust Company $16.2M (10% of AUM) Jan 2023
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports it does not have custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Feb 18, 2026.
View current Form ADV (SEC/IAPD) ↗