Columbia Asset Management holds a diversified book of 168 reported positions worth $575.2M as of Q2 2026 (disclosed Jul 21, 2026, a ~21-day 13F lag). This quarter Honeywell Aerospace Inc first appears in 13F filings, a listing rather than a purchase; they opened Berkshire Hathaway Inc-CL B and trimmed Apple Inc. Their largest long position is Apple Inc at 10% of the reported non-option book. Cloning the disclosed picks since 2024 would be +33% (+16.9%/yr). That is a simulation of the disclosed long book, not audited returns.
Following at the filing date actually beat the quarter-end book by 12.3 points over this window.
Growth of $10,000 cloning Columbia Asset Management's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~21 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
93% mapped to company sectors
+4 sectors below the cut, 7% together
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Columbia Asset Management
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| Hoffman, Alan N Investment Management | 9 / 80 | $161.1M |
| Ramsey Quantitative Systems | 8 / 80 | $95.6M |
| Independent Investors Inc | 34 / 80 | $443.7M |
| Financial Avengers, Inc. | 48 / 80 | $202.2M |
| Emerald Advisors, LLC | 37 / 80 | $658.6M |
| United American Securities Inc. (d/b/a UAS Asset Management) | 8 / 80 | $381.1M |
| Ardent Capital Management, Inc. | 19 / 80 | $197.2M |
| Aljian Capital Management, LLC | 47 / 80 | $430.9M |
Ranked by the share of each fund's own book sitting in the names it shares with Columbia Asset Management: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each position's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Apple Inc COM | $55.0M | 190.0K | 9.6% | ▼−4.1% Reduced · −8K sh | |
| 2 | Microsoft Corp COM | $33.3M | 89.3K | 5.8% | ▼−0.9% Reduced · −796 sh | |
| 3 | Alphabet Inc CAP STK CL A | $25.8M | 72.3K | 4.5% | ▼−2.5% Reduced · −2K sh | |
| 4 | Amazon Com Inc COM | $19.2M | 80.6K | 3.3% | ▼−4.6% Reduced · −4K sh | |
| 5 | Erie Indty Co CL A | $17.4M | 72.6K | 3.0% | ▲~0% Added · +23 sh | |
| 6 | Broadcom Inc COM | $17.2M | 45.4K | 3.0% | ▼−4.3% Reduced · −2K sh | |
| 7 | Visa Inc COM CL A | $17.2M | 50.0K | 3.0% | ▼−2.2% Reduced · −1K sh | |
| 8 | Berkshire Hathaway Inc Del CL B NEW | $16.9M | 33.7K | 2.9% | ▲New New position | |
| 9 | Caterpillar Inc COM | $15.1M | 14.2K | 2.6% | ▼−5.9% Reduced · −891 sh | |
| 10 | Merck & Co Inc COM | $14.2M | 110.5K | 2.5% | ▼−1.1% Reduced · −1K sh | |
| 11 | Johnson & Johnson COM | $13.0M | 51.2K | 2.3% | ▼−5.7% Reduced · −3K sh | |
| 12 | Alphabet Inc CAP STK CL C | $12.3M | 34.8K | 2.1% | ▼−2.3% Reduced · −804 sh | |
| 13 | JPMorgan Chase & Co COM | $10.4M | 31.8K | 1.8% | ▼−3.9% Reduced · −1K sh | |
| 14 | State STR SPDR S&P 500 ETF T TR UNIT | $10.3M | 13.8K | 1.8% | ▼−2.3% Reduced · −332 sh | |
| 15 | Cisco Sys Inc COM | $10.1M | 86.1K | 1.8% | ▼−4.3% Reduced · −4K sh | |
| 16 | Eli Lilly & Co COM | $9.6M | 8.0K | 1.7% | ▼−5.0% Reduced · −422 sh | |
| 17 | Abbvie Inc COM | $8.7M | 34.5K | 1.5% | ▼−2.3% Reduced · −804 sh | |
| 18 | Starbucks Corp COM | $8.1M | 79.7K | 1.4% | ▼−2.1% Reduced · −2K sh | |
| 19 | International Business Machs COM | $8.0M | 28.4K | 1.4% | ▼−2.9% Reduced · −841 sh | |
| 20 | Amgen Inc COM | $7.8M | 21.5K | 1.4% | ▼−4.3% Reduced · −962 sh | |
| 21 | Corning Inc COM | $7.8M | 30.4K | 1.3% | ▼−0.9% Reduced · −294 sh | |
| 22 | Nvidia Corporation COM | $6.7M | 33.7K | 1.2% | ▲+1.5% Added · +488 sh | |
| 23 | Union Pac Corp COM | $6.3M | 23.3K | 1.1% | ▼−4.2% Reduced · −1K sh | |
| 24 | Chevron Corporation COM | $5.8M | 34.9K | 1.0% | ▼−3.6% Reduced · −1K sh | |
| 25 | Coca Cola Co COM | $5.8M | 70.9K | 1.0% | ▼−1.8% Reduced · −1K sh | |
| 26 | Verizon Communications Inc COM | $5.4M | 126.9K | 0.9% | ▼−13% Reduced · −18K sh | |
| 27 | Procter & Gamble Co COM | $5.3M | 36.5K | 0.9% | ▼−8.2% Reduced · −3K sh | |
| 28 | Target Corp COM | $5.2M | 39.7K | 0.9% | ▼−5.4% Reduced · −2K sh | |
| 29 | Micron Technology Inc COM | $5.2M | 4.5K | 0.9% | ▼−20% Reduced · −1K sh | |
| 30 | Vanguard Index FDS SMALL CP ETF | $5.1M | 16.7K | 0.9% | ▼−0.8% Reduced · −132 sh | |
| 31 | Medtronic PLC SHS | $5.0M | 63.6K | 0.9% | ▲+3.4% Added · +2K sh | |
| 32 | Deere & Co COM | $4.9M | 7.8K | 0.9% | ▼−2.9% Reduced · −230 sh | |
| 33 | BP PLC SPONSORED ADR | $4.6M | 125.5K | 0.8% | ▼−2.9% Reduced · −4K sh | |
| 34 | Vanguard Star FDS VG TL INTL STK F | $4.6M | 53.9K | 0.8% | ▼−1.7% Reduced · −926 sh | |
| 35 | Pfizer Inc COM | $4.6M | 190.2K | 0.8% | ▼−2.1% Reduced · −4K sh | |
| 36 | Vanguard Specialized Funds DIV APP ETF | $4.5M | 19.2K | 0.8% | ▼−4.6% Reduced · −935 sh | |
| 37 | Pepsico Inc COM | $4.3M | 31.8K | 0.7% | ▼−0.6% Reduced · −194 sh | |
| 38 | Home Depot Inc COM | $4.3M | 12.1K | 0.7% | ▼−3.6% Reduced · −450 sh | |
| 39 | Stryker Corporation COM | $4.2M | 13.5K | 0.7% | ▼−3.8% Reduced · −535 sh | |
| 40 | Nike Inc CL B | $4.2M | 103.1K | 0.7% | ▲+1.9% Added · +2K sh | |
| 41 | McDonalds Corp COM | $4.2M | 15.6K | 0.7% | ▼−1.9% Reduced · −304 sh | |
| 42 | Costco Wholesale Corporation COM | $4.1M | 4.4K | 0.7% | ▼−3.3% Reduced · −150 sh | |
| 43 | United Parcel Svcs Inc CL B | $3.9M | 36.3K | 0.7% | ▼−7.9% Reduced · −3K sh | |
| 44 | Vanguard Index FDS MID CAP ETF | $3.7M | 45.9K | 0.6% | ▲+297% Added · +34K sh | |
| 45 | American Express Co COM | $3.7M | 10.8K | 0.6% | ▼−8.2% Reduced · −965 sh | |
| 46 | ASML Hldg NV N Y REGISTRY SHS | $3.5M | 1.8K | 0.6% | ▼−3.8% Reduced · −70 sh | |
| 47 | Vanguard Index FDS GROWTH ETF | $3.5M | 40.2K | 0.6% | ▲+481% Added · +33K sh | |
| 48 | Disney Walt Co COM | $3.2M | 32.8K | 0.5% | ▼−5.2% Reduced · −2K sh | |
| 49 | Citigroup Inc COM NEW | $3.1M | 22.1K | 0.5% | ▼−6.7% Reduced · −2K sh | |
| 50 | Shell PLC SPON ADS | $2.9M | 38.0K | 0.5% | ▼−2.4% Reduced · −945 sh |
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
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Use Arkolith to show Columbia Asset Management's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
| Quarter | As of | Filed | Lag | Positions | Value | Form |
|---|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Jul 21, 2026 | 21d | 168 | $575.2M | 13F-HR |
| Q1 2026 | Mar 31, 2026 | Apr 21, 2026 | 21d | 170 | $525.1M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Jan 28, 2026 | 28d | 174 | $562.7M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 4, 2025 | 35d | 168 | $534.4M | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Jul 18, 2025 | 18d | 170 | $508.8M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | Apr 10, 2025 | 10d | 232 | $511.2M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 12, 2025 | 43d | 268 | $547.1M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 12, 2024 | 43d | 181 | $573.8M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. Book totals and portfolio weights cover reported non-option positions, which can include notes and warrants. Disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.