Harbor Springs, MI Office

William Mack & Associates is a multi‑team registered investment adviser serving a mix of individual and institutional clients, including non‑HNW and high‑net‑worth individuals, retirement plans, trusts, and charitable organizations. The firm offers ongoing investment management through a retainer service as well as hourly financial planning, and manages roughly $1.03 billion in discretionary assets across about 950 accounts with a 15‑advisor team.

The firm’s investment approach emphasizes diversification, tax efficiency, and low‑cost funds, typically implementing one of six model strategies that range from defensive balanced to global equity and using no‑load mutual funds and ETFs within a tailored Investment Policy Statement; accounts are monitored at least quarterly. For clients with concentrated stock positions or specific income goals, the firm may recommend a third‑party covered‑call management platform and notes that it does not use artificial intelligence for investment analysis (it limits AI to administrative uses).

What is distinctive about the firm is its organizational links: the firm’s officers provide investment review, consultation and back‑office administration to an affiliated registered investment adviser and have ownership ties to a separate certified public accounting practice, arrangements the ADV discloses and that are uncommon among peers. The brochure also highlights that the firm will provide limited consultations on structured notes, Delaware statutory trusts, and private placements for accredited or qualified investors but will not perform focused due diligence on those offerings, a practice clients should be aware of.