From each company's latest annual SEC filing. Fiscal years can end on different dates.
Berkshire Hathaway (BRK-B) is the larger business by reported revenue: $371.4B in its fiscal year ended Dec 2025, about 24× MKL's $15.5B (fiscal year ended Dec 2025). BRK-B's net margin was 18.0% and MKL's 13.6%. Both file with the SEC under the same industry code, SIC 6331 (Fire, Marine & Casualty Insurance).
Figures come from each company's own SEC filings. This page compares the businesses; it is not a price target or a verdict.
| Company fact | BRK-B | MKL |
|---|---|---|
| Company | Berkshire Hathaway Inc. | Markel Group Inc. |
| Exchange | NYSE | NYSE |
| Headquarters | Omaha, Nebraska | — |
| Founded | 1839 | — |
| SEC industry | Fire, Marine & Casualty Insurance | Fire, Marine & Casualty Insurance |
| Fiscal year-end | December 31 | December 31 |
| Latest annual filing | 10-K · 2026-03-02 | 10-K · 2026-02-26 |
| Metric | BRK-B | MKL |
|---|---|---|
| Revenue | $371.4B2025-01-01 to 2025-12-31 · SEC filing | $15.5B2025-01-01 to 2025-12-31 · SEC filing |
| Net income | $67.0B2025-01-01 to 2025-12-31 · SEC filing | $2.1B2025-01-01 to 2025-12-31 · SEC filing |
| Operating cash flow | $46.0B2025-01-01 to 2025-12-31 · SEC filing | $2.8B2025-01-01 to 2025-12-31 · SEC filing |
| Diluted EPS | — | $169.222025-01-01 to 2025-12-31 · SEC filing |
| Net margin | 18.0%2025-01-01 to 2025-12-31 · SEC filing | 13.6%2025-01-01 to 2025-12-31 · SEC filing |
BRK-B: FY ending 2025-12-31 · MKL: FY ending 2025-12-31. Figures as tagged in each issuer's SEC XBRL filing; fiscal calendars may not align.
Overlap is drawn from SEC classifications and Yield Theory research themes. It is not evidence that the companies sell to the same customers or compete product for product.
Berkshire Hathaway is a diversified holding company with insurance, railroad, energy, and manufacturing operations, plus a large equity portfolio. Built by Warren Buffett, it is renowned for disciplined capital allocation.
Markel Group is a specialty insurer that also holds a diversified portfolio of investments and businesses.
Company-specific drivers maintained by Yield Theory. Use them to decide which filing deserves deeper work; they are not predictions.
We have not yet published a company-specific driver list for MKL. The primary source is Item 1 (Business) and Item 1A (Risk Factors) of its 10-K filed 2026-02-26.
You now know BRK-B reports about 24× MKL's revenue, and BRK-B keeps more of each dollar as net income. Those are the facts. The investment question is what each share price already assumes about the fire, marine & casualty insurance cycle, including “Insurance underwriting results and the cost of float across GEICO, primary, and reinsurance” at BRK-B, and which evidence in the next filings would prove that assumption wrong.
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Read the full researchStart with primary filings because fiscal calendars and accounting presentation can make superficially similar quarters incomparable. Both fiscal years end December 31, so annual reports line up, but check segment definitions before comparing growth or margins.
The current verified House and Senate snapshot contains 0 matched transaction rows for BRK-B and 28 matched transaction rows for MKL. These delayed, range-based disclosures can identify a filing to inspect; they do not establish motive, conviction, or a real-time trading signal.
This page does not contain licensed live prices, a valuation model, earnings estimates, portfolio constraints, or a forecast of future returns. SEC classifications can be broad, company descriptions can lag strategic change, and the latest annual filing may predate a material acquisition or divestiture. Read subsequent quarterly and current reports before making a decision.
A stronger business is not automatically the better stock. Starting valuation, expectations, capital structure, cyclicality, dilution, and the probability of each thesis determine the investment outcome. Use this comparison to frame the work, then verify the numbers in the linked filings and current company disclosures.
Berkshire Hathaway and Markel share the SEC industry classification “Fire, Marine & Casualty Insurance.” That makes the operating comparison relevant, but it does not prove that every product, customer, or revenue stream competes directly.
Berkshire Hathaway (BRK-B) is the larger business by reported revenue: $371.4B in its fiscal year ended Dec 2025, about 24× MKL's $15.5B (fiscal year ended Dec 2025). BRK-B's net margin was 18.0% and MKL's 13.6%. Both file with the SEC under the same industry code, SIC 6331 (Fire, Marine & Casualty Insurance). Each figure is the annual amount tagged in the company's own SEC XBRL filing; market value depends on live prices, which this page does not publish.
There is no context-free winner. Compare the operating exposures, filing evidence, valuation, balance sheet, and risks against the specific thesis you are testing. This page deliberately does not turn a static profile into a buy or sell recommendation.
No. Yield Theory does not republish unlicensed real-time market data. The financial figures on this page are the audited annual numbers Berkshire Hathaway Inc. and Markel Group Inc. tagged in their SEC XBRL filings. Use a regulated broker or licensed quote provider for current prices and valuation multiples.
Company classifications, fiscal year-ends, and filing links come from the SEC EDGAR submissions API snapshot refreshed 2026-10-10. Business summaries and research themes are maintained by Yield Theory.
Data snapshot: SEC EDGAR submissions API, refreshed 2026-10-10. Independent educational research; not investment advice.
BRK-B vs MKL compares reported results. The reports below show how we connect operating evidence to an investment thesis, its assumptions, catalysts, and risks. $39/month or $249/year.
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