Direct Answer
Arthur J. Gallagher & Co. reports revenue across 3 business segments in its fiscal 2025 Form 10-K. Brokerage is the largest, with $12.2 billion of revenue (87% of the total), followed by Risk Management at $1.7 billion (13%). 67% of revenue came from the United States.
How Does Arthur J. Gallagher & Co. Make Money?
Brokerage supplies 87% of revenue, so Arthur J. Gallagher & Co.'s results move mostly with that one business; the others matter more for diversification than for the headline number. Between fiscal 2024 and 2025, Brokerage grew fastest (+22.7%) and Corporate slowest (-93.8%), so the revenue mix tilts toward Brokerage while that gap lasts.
| Segment | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| Brokerage | $12.2 billion | $9.9 billion | 87.4% | 22.7% |
| Risk Management | $1.7 billion | $1.6 billion | 12.5% | 9.0% |
| Corporate | $1 million | $16 million | 0.0% | -93.8% |
Where Does Arthur J. Gallagher & Co.'s Revenue Come From?
Regions follow the definitions in the filing; most companies assign revenue by customer location.
| Region | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| United States | $9.4 billion | $7.4 billion | 67.4% | 26.4% |
| United Kingdom | $2.5 billion | $2.2 billion | 17.8% | 11.3% |
| Other Foreign | $886 million | $701 million | 6.4% | 26.4% |
| Australia | $586 million | $575 million | 4.2% | 1.9% |
| Canada | $395 million | $416 million | 2.8% | -5.0% |
| New Zealand | $207 million | $210 million | 1.5% | -1.4% |
What the Segment Figures Do Not Show
The rows above add up to 100% of Arthur J. Gallagher & Co.'s reported revenue for fiscal 2025; the difference is intersegment eliminations, corporate revenue or items the company reports outside its segments. Segment definitions are management's choice and change when a company reorganizes, in which case it restates prior years in the next filing, so a multi-year comparison should use the figures from a single filing. Revenue shows where sales come from, not where profit or cash is earned: a small segment can carry most of the margin.
Where These Numbers Come From
Every figure on this page is a value Arthur J. Gallagher & Co. reported in the segment note and revenue disclosures of its Form 10-K filed February 17, 2026 (accession 0001628280-26-008662), read from the SEC's Financial Statement Data Sets. The prior-year column is the comparative figure from that same filing, so it reflects any restatement for a change in segments. Category names are the company's own XBRL labels, lightly reformatted for reading.
Rows that only total other rows (for example a "Products" line beside the individual products) are left out so nothing is counted twice. This page is educational and describes reported history for fiscal 2025; it is not a forecast or a recommendation.
Frequently Asked Questions
What are Arthur J. Gallagher & Co.'s business segments?
In its fiscal 2025 Form 10-K, Arthur J. Gallagher & Co. reports revenue for Brokerage, Risk Management and Corporate.
Which part of Arthur J. Gallagher & Co. brings in the most revenue?
Brokerage, with $12.2 billion of revenue in fiscal 2025, or 87% of the total.
How much of Arthur J. Gallagher & Co.'s revenue comes from outside the United States?
33% in fiscal 2025, by the geographic breakdown Arthur J. Gallagher & Co. reports in its Form 10-K. Companies assign revenue to regions differently (customer location, shipping address or selling entity), so check the filing's definition before comparing companies.