Cornerstone Private Asset Trust Company, LLC, is a boutique trust company that helps businesses and individuals implement estate planning goals and transition wealth from one generation to the next. It provides services above and beyond those of a traditional trust company by focusing on the individual nature of each client and their long-term goals.

An independent public trust company based in Sioux Falls, South Dakota, Cornerstone provides unique tax advantages to its client's as well as a wide variety of specialized trust services, including trusts under wills as well as dynasty, charitable, revocable living trusts. 

In the retirement plan area, Cornerstone develops plans to meet the needs of the employees, the company and the owners. It specializes in working with business owners who excel at running their businesses, but do not want to be experts in retirement planning. Cornerstone works as a retirement planning partner keeping business owners informed on the status of their plans as well as their fiduciary responsibility as the plan sponsor of the company’s retirement program.