Mainstreet Investment Advisors Llc
- Regulatory AUM
- $5.9B
- Discretionary
- $963M
- Clients
- 58
- Avg AUM / client
- $101M
- Accounts
- 5,636
- Employees
- 26
AUM over time
Annual snapshots from Form ADV filings · as of Mar 27, 2026
Investments (13F portfolio — 158 positions, $664,535,940)
13F period Mar 31, 2026| # | Issuer | Class | Value | Shares | % of 13F | % of AUM |
|---|---|---|---|---|---|---|
| 1 | I Shares Core S&P Mid Cap Etf | ETF | $42,886,885 | 635,079 | 6.45% | 0.73% |
| 2 | I Shares Msci Eafe Etf | ETF | $40,195,405 | 413,831 | 6.05% | 0.69% |
| 3 | Apple Inc | Common Stock | $33,840,105 | 133,339 | 5.09% | 0.58% |
| 4 | Vanguard Short Term Treasury E | ETF | $29,295,758 | 500,440 | 4.41% | 0.5% |
| 5 | Microsoft Corp | Common Stock | $25,160,085 | 67,969 | 3.79% | 0.43% |
| 6 | Alphabet Inc | Common Stock | $19,793,042 | 68,831 | 2.98% | 0.34% |
| 7 | I Shares Core S&P Small Cap Etf | ETF | $19,137,400 | 153,949 | 2.88% | 0.33% |
| 8 | Jp Morgan Chase & Co | Common Stock | $18,595,913 | 63,217 | 2.8% | 0.32% |
| 9 | Blackrock Inc | Common Stock | $16,381,768 | 17,034 | 2.47% | 0.28% |
| 10 | Johnson & Johnson | Common Stock | $15,370,876 | 62,882 | 2.31% | 0.26% |
| 11 | Vanguard Intermediate Term Tre | ETF | $14,294,203 | 240,037 | 2.15% | 0.24% |
| 12 | Caterpillar Inc | Common Stock | $13,156,102 | 18,570 | 1.98% | 0.22% |
| 13 | Nvidia Corp | Common Stock | $13,118,368 | 75,220 | 1.97% | 0.22% |
| 14 | Broadcom Inc | Common Stock | $12,819,595 | 41,419 | 1.93% | 0.22% |
| 15 | Abb Vie Inc | Common Stock | $11,714,011 | 53,860 | 1.76% | 0.2% |
| 16 | I Shares Core S&P 500 Etf | ETF | $11,698,338 | 17,909 | 1.76% | 0.2% |
| 17 | Chevron Corp | Common Stock | $11,042,874 | 53,373 | 1.66% | 0.19% |
| 18 | Amazon.Com Inc | Common Stock | $10,593,445 | 50,864 | 1.59% | 0.18% |
| 19 | Procter & Gamble Co/The | Common Stock | $10,506,854 | 72,742 | 1.58% | 0.18% |
| 20 | Vanguard Ftse Emerging Markets | ETF | $10,370,682 | 191,872 | 1.56% | 0.18% |
| 21 | Waste Management Inc | Common Stock | $10,145,229 | 44,150 | 1.53% | 0.17% |
| 22 | Home Depot Inc/The | Common Stock | $9,013,888 | 27,407 | 1.36% | 0.15% |
| 23 | Mc Donald's Corp | Common Stock | $8,749,671 | 28,153 | 1.32% | 0.15% |
| 24 | Pepsi Co Inc | Common Stock | $8,476,660 | 54,586 | 1.28% | 0.14% |
| 25 | Honeywell International Inc | Common Stock | $8,297,335 | 36,709 | 1.25% | 0.14% |
Top 25 of 158 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 |
|---|---|---|---|
| High net worth individuals | 2 | $3.1M | 0.05% |
| Banking or thrift institutions | 56 | $5.9B | 99.9% |
People (15)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Alessandro Urbani | Head Of Revenie | CFA | Jan 2009 (18y) | Less than 5% |
| Michael Allen Steele | Chief Operating Officer | May 2014 (12y) | Less than 5% | |
| Zientek, Tara, Colleen | Head Of People | Dec 2015 (11y) | Less than 5% | |
| Crosson, John, Francis | Chief Executive Officer | Feb 2024 (3y) | Less than 5% | |
| Higgins, Roseann | Chief Compliance Officer | Feb 2024 (3y) | Less than 5% | |
| Charles Thomas Simko | Registered representative | CFA | Nov 2011 (15y) | |
| Igor Marjanovic | Registered representative | CFA | Jan 2017 (10y) | |
| Thomas S Mckinstry | Registered representative | CFA | Jan 2017 (10y) | |
| John M Gorman | Registered representative | Jan 2020 (7y) | ||
| Alex Taylor O'brien | Registered representative | Feb 2021 (5y) | ||
| Logan Clark | Registered representative | Apr 2023 (3y) | ||
| Francesco Spinnato | Registered representative | CFA | Jul 2023 (3y) | |
| Nehaben Padhiyar | Registered representative | Sep 2023 (3y) | ||
| Dwayne Miles Krpan | Registered representative | CFA | Dec 2025 (1y) | |
| Joseph Jordan Crosson | Registered representative | May 2026 (0y) |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| Up Capital, Llc | Shareholder | Feb 2024 | A | 75% or more |
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.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 03/27/2026 | 1.04 MB | 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
- • Fixed fees
Services
- • Portfolio management for individuals/small businesses
- • Portfolio management for businesses/institutional clients
- • Publication of periodicals or newsletters
Custody
Reported custodians
- Fifth Third Bank $8.1B (72% of AUM) Oct 2023
- Sei Investments Distribution Co. $1.2B (12% of AUM) Oct 2022
- Amalgamated Bank Of Chicago $909M (12% of AUM) Dec 2021
- Fidelity National Information Services, Inc. $787M (10% of AUM) Dec 2021
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: Mar 27, 2026.
View current Form ADV (SEC/IAPD) ↗