Arthur J. Gallagher & Co. (AJG)

How it makes money

Gallagher is paid in four ways, all of them disclosed separately in the income statement. Commissions ($8,024 million in 2025) are a percentage of the premium the client pays, and the company states plainly that it does not set those premiums. Fees ($4,195 million) are agreed with the client for a defined level of service, usually in place of a commission, and are the way the claims administration business is paid. Supplemental revenues ($466 million) are paid up front by underwriting enterprises on an annual or quarterly basis, while contingent revenues ($324 million) arrive only after the contract period, generally in the first or second quarter of the following year, and depend on the growth or the loss experience of the business placed. The remainder ($769 million) is interest income, premium finance and other income. Roughly 85% of commission and fee revenue is recognised on the effective date of the underlying insurance contract, which makes the revenue lumpy by quarter while costs stay broadly even through the year.

Revenue by segment

The filing describes Gallagher as the third largest insurance broker in the world by revenue and one of the largest property/casualty third-party claims administrators, with about 1,050 offices, 72,000 employees and roughly 780 acquisitions since 2002 — a distribution footprint that is expensive to replicate and that gives it access to markets and carrier relationships a small broker cannot match. Because it places risk rather than carrying it, it needs little capital to grow. The advantage is real but not impregnable: the company itself discloses significant competitive pressure in every one of its businesses, competition from Insurtech entrants and from clients moving to self-insurance and captives, and the concrete experience of losing key brokers and whole teams to rivals along with their clients.

Insurance is largely non-discretionary for a business, so most of Gallagher's book renews each year regardless of the economy, and the risk management segment is countercyclical at the margin because claims still have to be handled. What does move with the cycle is the size of the commission: revenue is a percentage of premium, and premiums swing between hard markets (rates rising, commissions rising with them) and soft markets (rates flat or falling, pressure on revenue), a cycle the filing describes as outside the company's control or prediction. Underlying exposure moves too — the clients' payrolls, revenues and asset values shrink in a downturn, and the 10-K notes that clients may reduce the amount they spend. When rates harden, buyers push back by raising deductibles and retaining more risk, which mutes the upside. Two further swing factors: contingent and supplemental revenues depend on carriers' loss experience, and interest income on cash and fiduciary balances rose sharply with rates, from $368 million in 2023 to $769 million in 2025.

Key risks

• Commissions follow premiums the company does not control — Item 1A states that much of the revenue comes from commissions based on a percentage of premiums that Gallagher does not set, that premiums are cyclical and can vary widely, and that brokerage revenue and profitability can therefore be volatile or stay depressed for long periods. A soft market pushes commission revenue down; insurers may also cut the commission rates they pay brokers. The company adds that it cannot forecast its commission revenue precisely.
• Acquisition strategy and integration — The company discloses that it may not be able to continue acquiring at the historical pace and lists the risks attached: retention of the acquired personnel and clients, liabilities not covered by escrow or indemnities, licensing and regulatory compliance, tax and accounting issues, and integration difficulties in IT and human resources. It notes explicitly that integrating large deals — AssuredPartners is named as the largest in its history — is more complex, may divert management attention, and that failure of targets to reach expected revenue and earnings could produce goodwill impairment charges.
• Contingent and supplemental revenues are hard to predict — A meaningful portion of revenue consists of contingent and supplemental payments from underwriting enterprises. Contingent revenues are paid only after the contract period, based on the growth and profitability of the business placed, so the company must estimate them each quarter using historical averages. It warns that where revenue depends on a full calendar year loss ratio, bad loss experience in the fourth quarter can not only wipe out that quarter's earnings but force a reversal of revenue already recognised earlier in the year.
• Cybersecurity and confidential client data — The company flags that improper disclosure of confidential, personal or proprietary information, and cyberattacks or other breaches of its systems or those of the third-party vendors it relies on, could bring regulatory scrutiny, legal liability and reputational harm. A separate risk factor covers changes in data privacy and protection law and any failure to comply with them.
• Talent, and the brokers who take clients with them — Success is said to depend in part on attracting and retaining qualified talent, including senior management. Competition for people is described as intense, particularly in claims management, IT, AI and data engineering, and remote working has widened the pool of employers competing for the same staff. The company states that it has in the past lost key brokers and groups of brokers to competitors along with their clients and business relationships, and warns separately that sustained increases in compensation and benefit costs could reduce profitability — compensation was $7,842 million of $12,071 million of total 2025 expenses.
• Debt, ratings and the holding company structure — The company discloses that its outstanding debt could reduce financial flexibility and subjects it to restrictions on how it operates, that a credit rating downgrade would raise financing costs and create operational risk, and that as a holding company it may not receive dividends or distributions from its subsidiaries in the amounts it needs. Interest expense was $639 million in 2025, carried entirely in the corporate segment.
• International operations and worldwide regulation — Substantial operations outside the United States expose the company to risks different from those it faces domestically, including currency movements and changes in tax law. Separate risk factors cover possible violations of the FCPA, the U.K. Bribery Act, other anti-corruption and sanctions laws and FATCA, and the possibility that failure to meet regulatory requirements — or a change in those requirements — could stop it conducting business or make it less profitable.

Top customers account for 3% of revenue

Concentration is close to nil. The 10-K states that in 2025 the largest single client represented approximately 1% and the ten largest clients together approximately 3% of combined brokerage and risk management revenues. The client base spans commercial, industrial, public sector, religious and nonprofit entities as well as underwriting enterprises served by the reinsurance and claims businesses. No single client leaving would matter to the group; what matters instead is whether whole teams of brokers stay, since the filing says departing brokers have taken their clients with them.