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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Short answer: no—not mechanically. Berkshire Hathaway’s disclosed holdings can generate useful research ideas, but a Form 13F is a delayed, incomplete snapshot of a large holding company’s portfolio. By the time you can read it, Berkshire may have changed a position, and the filing does not tell you whether the stock fits your price, risk tolerance, taxes or goals.
What Berkshire’s latest filing actually shows
The latest Berkshire Hathaway Form 13F-HR available for this question was filed on August 14, 2026, and reports positions held on June 30, 2026. That is a quarter-end snapshot, not an October portfolio and not a live trading feed.
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SEC rules allow institutional investment managers up to 45 days after calendar quarter-end to submit Form 13F. For the 2026 calendar, the filing deadline for the second quarter was August 14; the third-quarter deadline was November 16. A position shown in the June filing could therefore have been reduced, sold, or materially changed before the public saw it.
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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →The information table includes familiar issuers such as American Express, Apple, Bank of America and Chevron. Those names should be read as “reported holdings for the quarter ended June 30, 2026,” not as a current shopping list. The filing can contain multiple information-table rows for one issuer, so a single row is not necessarily a complete picture of Berkshire’s economic exposure or a single investment decision.
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Form 13F is also narrower than Berkshire’s balance sheet. Berkshire’s June 30, 2026 Form 10-Q reported $323.779 billion in equity securities, while Berkshire also owns operating companies, holds cash and uses other investments and financial instruments. The 13F covers only securities that fall within the form’s reporting rules.
“You should not include short positions on Form 13F.” — U.S. Securities and Exchange Commission staff, Frequently Asked Questions About Form 13F, Question 41.
That limitation matters. A 13F does not reveal short positions, so it cannot by itself show whether an investor is hedging, offsetting, or taking a broader position around a reported long holding. It is a regulatory disclosure, not a complete account of an investment strategy.
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Why copying a reported position can produce a different result
The filing arrives after the decision
Large managers trade during a quarter, then disclose eligible long positions afterward. You learn what was reportable at a past date, not the price Berkshire paid, the price it received for a sale, or the reason for the change. Even a quick purchase after publication can occur at a substantially different valuation.
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You do not know Berkshire’s intended holding period
Berkshire’s Owner’s Manual describes stock ownership as being a non-managing partner in a business. It emphasizes long-term progress rather than month-to-month price movements and says the company is generally unwilling to discuss specific stocks while freely discussing its business and investment philosophy. A retail investor who buys after a filing and sells after a disappointing quarter may be acting on a completely different time horizon.
The decision-maker has changed
Berkshire’s 2025 annual report says the board appointed Gregory E. Abel to succeed Warren E. Buffett as chief executive officer effective January 1, 2026. Major capital-allocation and investment decisions are Abel’s responsibility. Current holdings should therefore not automatically be described as Buffett’s personal picks. Attribute a specific purchase or sale to a named person only when a reliable source identifies that person.
Berkshire’s resources are unlike a household portfolio
Berkshire is a diversified holding company with operating businesses, insurance float, substantial capital and the ability to hold investments for a very long time. An individual investor may need liquidity, may face taxable sales, and may have a portfolio concentrated in the same sectors or companies. The same security can have a different role in each portfolio.
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What Berkshire’s performance does—and does not—prove
Berkshire has an exceptional long-term record, but that record is for owning Berkshire Hathaway shares, not for buying every position disclosed in a 13F after the filing becomes public.
| Measure | Berkshire | S&P 500 including dividends | Period |
|---|---|---|---|
| Annual per-share market-value change | 10.9% | 17.9% | 2025 |
| Compounded annual gain | 19.7% | 10.5% | 1965–2025 |
These figures, reported in Berkshire’s 2025 annual report, compare Berkshire’s per-share market value with the S&P 500 including dividends. They do not test a strategy that waits for each 13F, buys the reported stocks, pays trading costs and taxes, and holds them until the next disclosure. No independent backtest of that specific copy-trading process is established here, so Berkshire’s corporate return should not be presented as evidence that copying filings will achieve the same result.
Concentration is part of the model—and a major risk
At December 31, 2025, approximately 65% of the aggregate fair value of Berkshire’s equity securities was concentrated in its five largest holdings. That concentration reflects conviction, but it also creates material single-company and sector risk.
Berkshire’s annual report warns that a significant decline in large holdings could materially reduce consolidated equity and earnings. It also notes that a 30% hypothetical market-price decline is not a worst-case scenario. A household investor who copies the largest positions may unknowingly reproduce that concentration without having Berkshire’s operating businesses, insurance earnings, cash reserves or ability to wait through a drawdown.
- Check how much of your own portfolio would sit in one company after the purchase.
- Look for overlapping exposure through index funds, employer stock or other accounts.
- Decide in advance what loss, valuation change or business development would make you reduce the position.
- Keep enough cash for near-term needs so a market decline does not force a sale.
How to use a Berkshire 13F as a research lead
If you want to study Berkshire’s disclosures, use them to create questions rather than automatic orders.
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- Record the filing date and quarter. Write down that the June 30, 2026 holdings were filed on August 14, 2026. This prevents a historical snapshot from being mistaken for a current position.
- Read the complete information table. Do not rely on a headline list or one row. Review issuer names, share counts, market values and any separate rows for the same issuer.
- Confirm the security is in scope. Remember that the form excludes short positions and does not represent Berkshire’s operating businesses, cash or every investment on its balance sheet.
- Investigate the company independently. Read the issuer’s latest regulatory filings, understand revenue drivers, debt, competition, governance and cash generation, and identify what could permanently impair the business.
- Value the shares at today’s price. Berkshire may have bought at a lower valuation or may have a different tax basis. Build your own estimate of reasonable value and define the assumptions that would change it.
- Check portfolio fit. Compare the proposed position with your asset allocation, time horizon, emergency savings, tax situation and tolerance for a large loss.
- Set a monitoring rule. Decide whether you will review quarterly filings, company results or a specific business metric. Do not let a new disclosure become an excuse to trade every quarter.
For example, seeing American Express, Apple, Bank of America or Chevron in the June 30 filing can prompt questions about competitive advantages, cyclicality, regulation and valuation. It does not answer whether any of those shares are attractive at the price you can buy today.
Copying Berkshire versus other approaches
The right comparison is not “Berkshire’s return versus an index.” It is the practical process you would follow and the evidence each approach gives you.
| Approach | Information available | Main burden or risk |
|---|---|---|
| Buy after each Berkshire 13F | Historical eligible long positions, reported up to 45 days after quarter-end | Lag, missing short positions, uncertain trade prices and potentially high concentration |
| Study Berkshire’s businesses and philosophy | Owner’s Manual, annual reports and shareholder communications | Requires independent valuation; does not provide a current trade signal |
| Use a diversified index fund | Broad market exposure held according to the fund’s stated rules | Market-wide declines remain possible; you give up the chance to concentrate on a few ideas |
| Build an individual stock portfolio | Your own analysis and current prices | Research time, behavioral mistakes, trading costs and tax consequences |
A diversified approach can reduce the damage from one company’s decline, while a concentrated approach can produce larger gains or losses. Neither choice is automatically correct; the decision depends on the role the money must play and how much volatility you can sustain without abandoning the plan.
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Costs, taxes and monitoring are part of the decision
A filing-copy strategy can create activity without creating an informational advantage. Each purchase may involve a spread or commission, and sales in a taxable account can realize capital gains. Rebalancing after every new filing can also turn a long-term idea into short-term trading. Before placing an order, estimate the tax basis you would create, the likely holding period and the cost of reversing the position if your thesis changes.
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Monitoring has an opportunity cost as well. You must track filing dates, company announcements and portfolio weights, then distinguish a meaningful business change from ordinary price volatility. If you do not have a repeatable process, a simple diversified allocation may be easier to maintain than a portfolio built around delayed disclosures.
Common mistakes to avoid
- Calling a 13F real time. The report is delayed by the filing window and may already be stale.
- Assuming the list is complete. Short positions and non-reportable assets are absent.
- Calling every holding a Buffett pick. Since January 1, 2026, Greg Abel has been CEO and is responsible for major capital-allocation and investment decisions.
- Equating Berkshire’s results with copy-trading results. Berkshire’s reported returns include its operating companies, cash, insurance activities and investment decisions over decades.
- Ignoring concentration. Five holdings represented approximately 65% of Berkshire’s equity-securities fair value at December 31, 2025.
- Buying because the name is familiar. Recognition is not a valuation analysis or a risk assessment.
- Using a single information-table row as the whole position. Some issuers appear in multiple rows, so review the filing as a complete table.
A practical decision rule
Copying a Berkshire disclosure is defensible only as a starting point for your own work. Proceed only if you can answer all of these questions in writing:
- What exactly was reported, and for which quarter?
- What could have changed between quarter-end and the filing date?
- What business problem does the company solve, and what could permanently weaken it?
- What price would make the investment unattractive?
- How large could the loss be in a severe but plausible scenario?
- How does the position affect your total portfolio, including taxes and overlapping funds?
- What evidence will make you hold, add, or sell?
If you cannot answer those questions, the filing has given you a name, not an investment case. Treat the name as a candidate for further analysis or skip it.
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Berkshire’s Owner’s Manual and shareholder-letter archive explain its partnership mindset and investment philosophy. The Essays of Warren Buffett: Lessons for Corporate America is another background resource, but it is not a source of current holdings and does not make copying a 13F safer.
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