Here’s a clearer, up‑to‑date breakdown of the top 10 U.S. investment & stock‑trading companies, based on assets under management (AUM) and brokerage prominence: Top 10 U.S. Investment & Brokerage Firms (by Assets Under Management and Influence) 1. BlackRock 2. Vanguard Group 3. Fidelity Investments 4. State Street Global Advisors (State Street) 5. Morgan Stanley 6.…