MainStreet Investment Advisors LLC — 13F Holdings & Portfolio
CIK 1729854 · latest 13F-HR filed 2026-08-12
MainStreet Investment Advisors LLC manages $734.3M in 13F-reported U.S. long-equity assets across 166 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are IJH (6.26%), EFA (5.73%), AAPL (5.09%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 14 new positions, exited 6, added to 93, and trimmed 30.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
33RD FLOOR
CHICAGO, IL 60602
$734.3M
Long-equity book
166
Distinct positions
2026-06-30
Filed 2026-08-12
+14 / −6 / ↑93 / ↓30
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- iShares Core S&P 500 ETF$5.7M +48.3%
- Caterpillar Inc$4.2M +31.6%
- Palo Alto Networks Inc$3.5M +114.1%
- Apple Inc$3.5M +10.4%
- iShares Core S&P Mid-Cap ETF$3.1M +7.2%
Top Trims
- Genuine Parts Co-$2.7M -93.1%
- Chevron Corp-$2.0M -17.8%
- Public Storage-$1.9M -51.3%
- PepsiCo Inc-$1.2M -14.6%
- McDonald's Corp-$1.1M -12.1%
New Positions
- Honeywell International Inc$4.1M
- Honeywell Aerospace Inc$4.1M
- Harbor Commodity All Weather S$2.3M
- RTX Corp$2.1M
- ExxonMobil Holdings Corp$1.0M
Exited Positions
- Honeywell International Inc$8.3M
- RTX Corp$2.1M
- Schwab US Broad Market ETF$891.0K
- Exxon Mobil Corp$801.6K
- Autodesk Inc$370.1K
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Mid-Cap ETF | IJH | 464287507 | $46.0M | 6.26% | 595,959 | SH |
| 2 | iShares MSCI EAFE ETF | EFA | 464287465 | $42.1M | 5.73% | 404,826 | SH |
| 3 | Apple Inc | AAPL | 037833100 | $37.3M | 5.09% | 129,063 | SH |
| 4 | Vanguard Short-Term Treasury E | VGSH | 92206C102 | $29.2M | 3.98% | 501,923 | SH |
| 5 | Microsoft Corp | MSFT | 594918104 | $25.3M | 3.45% | 67,883 | SH |
| 6 | Alphabet Inc | GOOGL | 02079K305 | $22.4M | 3.05% | 62,711 | SH |
| 7 | iShares Core S&P Small-Cap ETF | IJR | 464287804 | $21.3M | 2.91% | 143,922 | SH |
| 8 | JPMorgan Chase & Co | JPM | 46625H100 | $20.6M | 2.81% | 62,999 | SH |
| 9 | iShares Core S&P 500 ETF | IVV | 464287200 | $17.4M | 2.36% | 23,168 | SH |
| 10 | Caterpillar Inc | CAT | 149123101 | $17.3M | 2.36% | 16,262 | SH |
| 11 | Blackrock Inc | BLK | 09290D101 | $16.2M | 2.21% | 16,894 | SH |
| 12 | Johnson & Johnson | JNJ | 478160104 | $16.0M | 2.19% | 63,190 | SH |
| 13 | Broadcom Inc | AVGO | 11135F101 | $15.9M | 2.16% | 42,003 | SH |
| 14 | NVIDIA Corp | NVDA | 67066G104 | $15.3M | 2.09% | 76,679 | SH |
| 15 | Vanguard Intermediate-Term Tre | VGIT | 92206C706 | $14.9M | 2.03% | 252,978 | SH |
| 16 | AbbVie Inc | ABBV | 00287Y109 | $13.5M | 1.84% | 53,744 | SH |
| 17 | Amazon.com Inc | AMZN | 023135106 | $11.9M | 1.63% | 50,094 | SH |
| 18 | Vanguard FTSE Emerging Markets | VWO | 922042858 | $11.1M | 1.52% | 186,625 | SH |
| 19 | Procter & Gamble Co/The | PG | 742718109 | $10.7M | 1.45% | 72,717 | SH |
| 20 | Waste Management Inc | WM | 94106L109 | $9.9M | 1.34% | 44,255 | SH |
| 21 | Home Depot Inc/The | HD | 437076102 | $9.7M | 1.32% | 27,446 | SH |
| 22 | Chevron Corp | CVX | 166764100 | $9.1M | 1.24% | 54,730 | SH |
| 23 | Cisco Systems Inc | CSCO | 17275R102 | $8.3M | 1.14% | 70,975 | SH |
| 24 | McDonald's Corp | MCD | 580135101 | $7.7M | 1.05% | 28,457 | SH |
| 25 | PepsiCo Inc | PEP | 713448108 | $7.2M | 0.99% | 53,461 | SH |
| 26 | Microchip Technology Inc | MCHP | 595017104 | $7.0M | 0.96% | 77,136 | SH |
| 27 | Emerson Electric Co | EMR | 291011104 | $6.9M | 0.94% | 48,254 | SH |
| 28 | Palo Alto Networks Inc | PANW | 697435105 | $6.6M | 0.90% | 19,401 | SH |
| 29 | Goldman Sachs Group Inc/The | GS | 38141G104 | $6.5M | 0.88% | 6,408 | SH |
| 30 | Southern Co/The | SO | 842587107 | $6.3M | 0.86% | 65,921 | SH |
| 31 | Lockheed Martin Corp | LMT | 539830109 | $5.9M | 0.80% | 11,520 | SH |
| 32 | US Bancorp | USB | 902973304 | $5.4M | 0.73% | 88,767 | SH |
| 33 | Visa Inc | V | 92826C839 | $5.3M | 0.73% | 15,586 | SH |
| 34 | Altria Group Inc | MO | 02209S103 | $5.3M | 0.72% | 73,176 | SH |
| 35 | American Electric Power Co Inc | AEP | 025537101 | $5.2M | 0.71% | 38,063 | SH |
| 36 | Vanguard Total Bond Market ETF | BND | 921937835 | $4.9M | 0.67% | 67,144 | SH |
| 37 | Tesla Inc | TSLA | 88160R101 | $4.8M | 0.66% | 11,523 | SH |
| 38 | QUALCOMM Inc | QCOM | 747525103 | $4.8M | 0.65% | 25,779 | SH |
| 39 | Walmart Inc | WMT | 931142103 | $4.7M | 0.63% | 41,082 | SH |
| 40 | International Business Machine | IBM | 459200101 | $4.5M | 0.62% | 16,136 | SH |
| 41 | Cummins Inc | CMI | 231021106 | $4.4M | 0.60% | 6,218 | SH |
| 42 | Meta Platforms Inc | META | 30303M102 | $4.4M | 0.60% | 7,865 | SH |
| 43 | Paychex Inc | PAYX | 704326107 | $4.3M | 0.59% | 43,937 | SH |
| 44 | Enbridge Inc | ENB | 29250N105 | $4.3M | 0.59% | 79,604 | SH |
| 45 | Marriott International Inc/MD | MAR | 571903202 | $4.3M | 0.59% | 11,601 | SH |
| 46 | Cadence Design Systems Inc | CDNS | 127387108 | $4.1M | 0.56% | 11,020 | SH |
| 47 | Honeywell International Inc | HON | 438516205 | $4.1M | 0.56% | 18,469 | SH |
| 48 | Honeywell Aerospace Inc | HONA | 43849R105 | $4.1M | 0.56% | 18,660 | SH |
| 49 | iShares MSCI ACWI ETF | ACWI | 464288257 | $4.0M | 0.55% | 25,719 | SH |
| 50 | Merck & Co Inc | MRK | 58933Y105 | $4.0M | 0.54% | 31,131 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-12 | $734.3M | 166 | 0001765380-26-000357 |
| 2026-03-31 | 2026-05-11 | $664.5M | 158 | 0001765380-26-000200 |
| 2025-12-31 | 2026-02-10 | $695.6M | 159 | 0001765380-26-000089 |
| 2025-09-30 | 2025-11-10 | $743.8M | 161 | 0001765380-25-000457 |