Berkshire Hathaway vs Marsh & Mclennan Companies (BRK.B vs MRSH)
Side by side from their SEC filings: revenue, margins, growth, returns and valuation, plus short interest, insider activity and institutional ownership.
Berkshire Hathaway is the larger company by revenue ($247.2B vs $27.0B) and market value ($1.1T vs $89.6B). Marsh & Mclennan Companies has grown revenue faster over the last 4 fiscal years (+36.1% cumulative vs +29.3%). Berkshire Hathaway trades at the lower trailing P/E (12.7x vs 22.9x).
About Berkshire Hathaway
Berkshire Hathaway Inc. is a holding company that owns subsidiaries operating in various industries, including insurance, freight rail transportation, and utility and energy generation and distribution. Its insurance businesses provide property, casualty, life, and health insurance and reinsurance services worldwide. The company serves a diverse range of customers through its decentralized subsidiaries, employing approximately 387,800 people globally.
About Marsh & Mclennan Companies
Marsh & McLennan Companies, Inc. provides risk management, insurance and reinsurance brokerage, and consulting services worldwide. Its Risk and Insurance Services segment includes Marsh Risk, which offers insurance broking, risk advisory, and program management, and Guy Carpenter, which specializes in reinsurance broking and strategic advisory. The Consulting segment delivers health, wealth, career advice, and management consulting services through Mercer and Marsh Management Consulting to organizations globally.
Head to head (BRK.B FY2025 vs MRSH FY2025)
| Metric | BRK.BFY2025 | MRSHFY2025 |
|---|---|---|
| Revenue | $247.24B | $26.98B |
| Revenue growth (YoY) | -1.0% | 10.3% |
| Gross margin | — | — |
| Operating margin | — | 23.1% |
| Net margin | 27.1% | 15.4% |
| Net income | $66.97B | $4.16B |
| Diluted EPS | — | $8.43 |
| FCF margin | 10.1% | 18.5% |
| ROE | 9.3% | 27.2% |
| Long-term debt / equity | — | 1.20× |
| Market cap | $1.08T | $89.64B |
| P/E | 12.7× | 22.9× |
Fundamentals are from each company’s SEC filings (BRK.B FY2025, MRSH FY2025). ROE is net income over fiscal-year-end equity; long-term debt / equity counts non-current term debt only. P/E and market cap are derived from stored market prices, last retrieved on a rolling basis and typically within the past week.
Five-year trend (as reported)
| Revenue | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
| BRK.B | $191.25B | $207.77B | $254.91B | $249.71B | $247.24B |
| MRSH | $19.82B | $20.72B | $22.74B | $24.46B | $26.98B |
Peer standing
Where each company ranks among the 88 insurance companies, on the same scale. Each figure is ranked only against peers that report it. Percentiles describe position in the distribution, not a rating.
| Metric | BRK.B | MRSH |
|---|---|---|
| Net margin | 27.1%90th percentile of 82 | 15.4%69th percentile of 82 |
| FCF margin | 10.1%31st percentile of 55 | 18.5%57th percentile of 55 |
| Revenue growth (YoY) | -1.0%20th percentile of 88 | +10.3%55th percentile of 88 |
| ROE | 9.3%31st percentile of 73 | 27.2%83rd percentile of 73 |
| P/E | 12.7×61st percentile of 72 | 22.9×80th percentile of 72 |
| Short interest (days to cover) | 2.47d24th percentile of 87 | 4.32d52nd percentile of 87 |
Short interest
| FINRA settlement data | BRK.B | MRSH |
|---|---|---|
| Shares sold short | 11.1M | 7.4M |
| Change vs prior settlement | -11.1% | -1.5% |
| Days to cover | 2.47 | 4.32 |
| As of settlement | 2026-08-14 | 2026-08-14 |
Source: FINRA Consolidated Short Interest. FINRA is the owner and source of the FINRA-supplied data; republishing or redistributing it is not permitted. Not presented as a percentage of float. No FINRA endorsement of this product is implied.
Insider activity (last 90 days)
| Form 4 activity (codes P/S) | BRK.B | MRSH |
|---|---|---|
| Buys | 3 ($250,072) | 0 |
| Sells | 0 | 4 ($4.8M) |
Non-derivative purchases (code P) and sales (code S) reported on SEC Form 4, which may be open-market or private (grants, exercises and tax withholding excluded). For context, about 14% of covered companies saw any reported insider purchase (code P) in a 90-day window.
Held by the same investors
8 tracked 13F managers hold both Berkshire Hathaway and Marsh & Mclennan Companies as of their latest quarterly filings: AQR Capital Management, Citadel Advisors, D. E. Shaw, Gotham Asset Management, Harris Associates (Oakmark), Markel Group, Millennium Management, Two Sigma Investments. See which superinvestors hold your own portfolio with the smart money checker.
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Data sourced from SEC EDGAR. Figures are as-reported and may be unaudited or restated; verify against the source filings before relying on them. Comparisons are descriptive (higher or lower on a reported figure), not a rating or a recommendation. Informational only. Not investment advice.