Welcome to South Dakota Trust Company!

“Serving Families in Perpetuity”

South Dakota Trust Company LLC (SDTC) is a national boutique trust company founded by Al W. King III and Pierce H. McDowell III, and headquartered in Sioux Falls, South Dakota. SDTC's business is designed to accommodate the needs and desires of wealthy clients, both domestically and internationally, providing "flexible, cost- effective, service-oriented trust administration" in the #1 rated domestic trust jurisdiction. SDTC’s focus is to serve families’ individual goals, while preserving family wealth in perpetuity.

SDTC has more than $10 billion in assets under administration and $70 billion under agency. South Dakota's trust, income tax, asset protection, and private family trust company laws are top rated in the U.S. These laws have attracted more than 70 billionaires and 200 centa-millionaire clients to SDTC.

SDTC does not manage investment assets and consequently works with all outside investment managers and custodians of the client's choice, which is unique in the industry. Additionally, SDTC administers all types of non-financial assets, e.g., closely-held stocks, limited partnerships, residential and commercial real estate, LLCs, oil and gas interests, offshore entities, etc.

SDTC is independent and state chartered, and has reciprocity with most states. Consequently, SDTC can administer trusts from nearly all states.

South Dakota Planning Company LLC (SDPC) is located in New York City and is a separate sister company to South Dakota Trust Company. SDPC is responsible for sales, marketing and technical support, as well as publications, speeches, trust planning and consulting to support SDTC. Absolutely no trust administration is done out of the New York office.