Santander US Capital Markets LLC

About Santander US Capital Markets LLC

Santander US Capital Markets LLC (SanCap) is a broker-dealer that acts as the institutional broker-dealer of Santander in the United States, operating under Santander Corporate & Investment Banking. It was formed in 2023 by combining Santander Investment Securities Inc. with Amherst Pierpont Securities LLC, and it is a wholly owned subsidiary of Santander Holdings USA, Inc. The firm is registered with the SEC as a broker-dealer, is a FINRA member, and is also registered with the CFTC as a futures commission merchant. Its main activities center on fixed income, including market-making in U.S. Treasury and agency products, with additional work in equities and FX spot.

The firm describes services that include debt and equity capital markets underwriting, M&A and corporate finance advisory, asset-backed financing, securities financing, and exchange traded derivatives brokerage. Its institutional client base includes asset managers, hedge funds, banks, pension funds and insurance companies. Its headquarters is at 437 Madison Avenue in New York City, and the firm also lists offices in Texas, Massachusetts, Illinois, Florida, California and Connecticut.

Practice areas

Areas of work that Santander US Capital Markets LLC describes on its own website. They describe the organization as a whole, not the practice of any individual attorney listed below.

Organization profile based on its official website and public sources (reviewed October 30, 2026). Attorney list from the New York State Unified Court System registration data. Not affiliated with Santander US Capital Markets LLC.

Registered attorneys

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