APO vs WDC Comparison

Apollo is one of the world's largest alternative asset managers, with $908.4 billion in total assets under management, or AUM, including $685.0 billion in fee-earning assets, at the end of September 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 $125.6 billion in total AUM and $71.7 billion in fee-earning AUM), real estate/real assets ($59.6 billion/$27.1 billion), and private credit ($723.2 billion/$586.2 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.

Western Digital is a leading vertically integrated supplier of hard disk drives. The HDD market is a practical duopoly, with Western Digital and Seagate being the two largest players. Western Digital designs and manufactures its HDDs, with much of the manufacturing and workforce located in Asia. The primary consumers of HDDs are data centers.