Tiedemann Advisors | 5,408 followers on LinkedIn. Tiedemann Advisors partners with you to ensure your wealth achieves what matters most to you — now and in the future. | Tiedemann Advisors is one of the largest independent investment and wealth advisors for high-net-worth individuals, families, trusts, foundations and endowments. Founded in 1999, Tiedemann has nine offices across the U.S. including its trust services office, Tiedemann Trust Company, a state-chartered trust company located in Wilmington, Delaware.