JEF vs AMG Comparison

Jefferies Financial Group is a full-service investment banking and capital markets firm that was founded in 1962. After nearly 30 years of focusing on institutional trading services, it entered the investment banking industry in the early 1990s, which ultimately grew into the core business. In 2013, Jefferies merged with Leucadia, a manufacturing-focused holding company. Since merging, Jefferies became the bedrock of the business as the bulk of the legacy portfolio was sold off and the parent company was renamed to match the subsidiary. Within the investment banking landscape, Jefferies predominately serves the North American middle market and has captured considerable market share over the past decade.

Affiliated Managers Group offers investment strategies to investors through its network of affiliates. The firm typically buys a majority interest in small to mid-size boutique asset managers, receiving a fixed percentage of revenue from these firms in return. Affiliates operate independently, with AMG providing strategic, operational, and technology support, as well as global distribution. At the end of December 2025, AMG's affiliate network—which includes firms like Abacus Capital and Pantheon dedicated to private markets (which accounted for 18% of AUM), AQR Capital and Capula Investment Management in liquid alternatives (28%), and Harding Loevner, Tweedy Browne, Parnassus, and Yacktman in equities, multi-asset, and bond strategies (54%)—had $813.3 billion in managed assets.