APO vs PSA Comparison

Apollo is one of the world's largest alternative asset managers, with $938.4 billion in total assets under management, or AUM, including $709.1 billion in fee-earning assets, at the end of 2025. The company has two core operating segments: asset management and retirement services. Apollo operates with scale in each of its major product lines—private equity (with $128.4 billion in total AUM and $75.0 billion in fee-earning AUM), real estate/real assets ($60.8 billion/$27.6 billion), and credit ($749.2 billion/$606.5 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.

Public Storage is the largest owner of self-storage facilities in the US, with more than 3,500 self-storage facilities in 40 states and approximately 258 million square feet of rentable space. Through equity interests, it also has exposure to the European self-storage market through Shurgard Self Storage. The company also has a merchandise business, a third-party property management business, and an insurance business that offers products to cover losses for the goods in self-storage facilities.