If you have questions or want to make an appointment then contact us:

Argonne Trust Company

4418 S. Technology Drive

Sioux Falls, SD  57106


Phone: (605) 274-3336



Business hours:

9-5 CST


3 Dimensional Wealth Family Office Services

45 Park Avenue

Suite 406

New York, NY 10016


Phone: 877-3D-Wealth



Business hours:

9-5 EST

Use the form below to send us your requests and inquiries, or to make an appointment.

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South Dakota Trust Administration Office

Argonne Trust Company, Inc.

4418 S. Technology Drive

Sioux Falls, SD 57106



(605) 274-3336



Or use our contact form.


Business Hours

9-5 CST

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