AON vs APO Comparison

Aon is a leading global provider of insurance and reinsurance brokerage and human resources solutions. Its operations are tilted toward its brokerage operations. Headquartered in London, Aon has about 60,000 employees and operations in over 120 countries.

Apollo is one of the world's largest alternative asset managers, with $1.047 trillion in total assets under management, or AUM, including $858.0 billion in fee-earning assets, at the end of June 2026. The company has two core operating segments: asset management and retirement services. Apollo operates with scale in most of its major asset management endeavors—private equity (with an estimated $137.2 billion in total AUM and $76.3 billion in fee-earning AUM), real estate/real assets ($60.8 billion/$27.6 billion), and credit ($849.3 billion/$754.1 billion). Apollo has a distribution profile that is likely not too far off from the industry averages—with 84% of its assets held by institutional investors and 16% by high-net-worth clients.