BLK vs SAN Comparison

BlackRock is the largest asset manager in the world, with $13.464 trillion in assets under management at the end of September 2025. Its product mix is diverse, with 55% of managed assets in equity strategies, 24% in fixed income, 9% in multi-asset classes, 7% in money market funds, and 5% in alternatives. Passive strategies account for more than two-thirds of long-term AUM, with the company's ETF platform maintaining a leading market share domestically and on a global basis. Product distribution is weighted more toward institutional clients, which, by our calculations, account for around 80% of AUM. BlackRock is geographically diverse, with clients in more than 100 countries and more than one-third of managed assets coming from investors domiciled outside the US and Canada.

Santander's focus is on retail and commercial banking. Latin America is geographically the most significant operation, with Brazil making the largest contribution. Its continental European business is mainly in Spain and Portugal. Santander's UK presence is the result of its acquisition of Abbey building society. In the US, Santander operates a vehicle finance business and a regional bank focused on the Northeastern states.