Arthur J. Gallagher vs Berkshire Hathaway (AJG vs BRK.B)
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 $13.9B) and market value ($1.1T vs $65.0B). Arthur J. Gallagher has grown revenue faster over the last 4 fiscal years (+69.8% cumulative vs +29.3%). Berkshire Hathaway trades at the lower trailing P/E (14.7x vs 41.0x).
About Arthur J. Gallagher
Arthur J. Gallagher & Co. provides insurance brokerage, reinsurance brokerage, consulting, and third-party property and casualty claims settlement and administration services globally. The company serves commercial, nonprofit, public sector entities, insurance companies, and individuals through its brokerage and risk management segments. Its services include placing insurance and reinsurance coverage, managing risk and employer-sponsored benefit programs, and administering claims for self-insured entities.
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.
Head to head (AJG FY2025 vs BRK.B FY2025)
| Metric | AJGFY2025 | BRK.BFY2025 |
|---|---|---|
| Revenue | $13.94B | $247.24B |
| Revenue growth (YoY) | 20.7% | -1.0% |
| Gross margin | — | — |
| Operating margin | — | — |
| Net margin | 10.7% | 27.1% |
| Net income | $1.49B | $66.97B |
| Diluted EPS | $5.74 | — |
| FCF margin | — | 10.1% |
| ROE | 6.4% | 9.3% |
| Debt / equity | 0.5× | — |
| Market cap | $65.03B | $1.06T |
| P/E (TTM) | 41.0× | 14.7× |
Fundamentals are from each company’s SEC filings (AJG FY2025, BRK.B FY2025). P/E and market cap are derived from recent market prices and update daily.
Five-year trend (as reported)
| Revenue | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
| AJG | $8.21B | $8.55B | $10.07B | $11.55B | $13.94B |
| BRK.B | $191.25B | $207.77B | $254.91B | $249.71B | $247.24B |
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 | AJG | BRK.B |
|---|---|---|
| Net margin | 10.7%48th percentile of 82 | 27.1%90th percentile of 82 |
| Revenue growth (YoY) | +20.7%68th percentile of 88 | -1.0%20th percentile of 88 |
| ROE | 6.4%24th percentile of 73 | 9.3%31st percentile of 73 |
| P/E (TTM) | 41.0×89th percentile of 71 | 14.7×63rd percentile of 71 |
| Short interest (days to cover) | 3.36d60th percentile of 86 | 2.19d31st percentile of 86 |
Short interest
| FINRA settlement data | AJG | BRK.B |
|---|---|---|
| Shares sold short | 6.8M | 13.0M |
| Change vs prior settlement | -0.8% | +4.0% |
| Days to cover | 3.36 | 2.19 |
| As of settlement | 2026-06-30 | 2026-06-30 |
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 open-market activity | AJG | BRK.B |
|---|---|---|
| Buys | 0 | 2 ($250,546) |
| Sells | 1 ($618,000) | 0 |
Open-market purchases and sales reported on SEC Form 4 (grants, exercises and tax withholding excluded). For context, about 16% of covered companies saw any open-market insider buy in a 90-day window.
Held by the same investors
6 tracked 13F managers hold both Arthur J. Gallagher and Berkshire Hathaway as of their latest quarterly filings: AQR Capital Management, Citadel Advisors, Dodge & Cox, Gotham Asset Management, Millennium Management, Renaissance Technologies. See which superinvestors hold your own portfolio with the smart money checker.
Go deeper
AJG vs ALLAJG vs AONAJG vs CBAJG vs MMCAJG vs PGRAJG vs TRVAll insurance stocks →All comparisons →
Track AJG and BRK.B
Get an alert when either company files something material, see which superinvestors own them, and ask their filings a question with cited answers.
Start monitoring freeIncludes one free filing-grounded research answer. Or check your whole portfolio, no account needed.
Data sourced from SEC EDGAR (public domain). 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.