Stoy Hall, CFP®
Stoy started Black Mammoth to build the thing he could never find for his own clients: one team that runs your entire financial life, business and personal, and tells you the truth while doing it. No jargon, no judgment, no products you do not need. Just a fiduciary in your corner who will say the hard part out loud.
A CERTIFIED FINANCIAL PLANNER named to Investopedia's Top 100 Financial Advisors, Stoy works with business owners and their families across the country from the firm's home base in Ankeny, Iowa. He built Black Mammoth as a modern family office: the coordinated, everything-in-one-place financial team that used to be reserved for the ultra-wealthy, rebuilt for regular business owners.
He is also the host of the NoBS Wealth Podcast, where he has the money conversations most advisors avoid, the mindset, the behavior, and the real story behind the numbers. It is the same voice you get in person: direct, human, and hard to find anywhere else.
A former Drake University football player, Stoy runs the firm the way good teams operate, on preparation, accountability, and people who treat each other like family. Here, that is not a slogan. His actual family helps run the place.
Runs point on your whole picture: taxes, cash flow, investments, entity structure, insurance, estate, and the outside professionals, coordinated so nothing slips through the cracks.
Michelle Hall
Officially, Michelle is Black Mammoth's Executive Administrator. Unofficially, she is the reason the whole thing runs. Behind the scenes she handles the organization, the scheduling, and the information gathering, and in her own words, keeps Stoy in line and takes the chaos down a notch. If a meeting starts on time and nothing slips through the cracks, that is Michelle.
Before joining the firm in December 2024, she spent 11 and a half years as a Physical Therapist Assistant. She is also a former Division I soccer player, center mid at the University of South Dakota. Go Yotes. Playing the middle taught her something she uses here every day: you have to understand how the defense, the midfielders, and the strikers all connect, and then link them together. That is exactly how she thinks about clients, connecting the dots across the pieces of your financial life and the people who handle them.
She joined because Stoy asked her to, and as she puts it, hearing your spouse say they want you in their business means something. Plenty of people raised an eyebrow at a wife working alongside her husband. Her honest take: it comes down to balance and communication, and it works. She will also tell you she still has a lot to learn, and that Stoy is a genuinely good teacher who makes complicated things simple. It is the same thing his clients say about him.
Ask her to choose between money and family and the answer is family. Obviously. But she cares a great deal about the money too: knowing where it is, building savings and flexibility, and getting to a place of real financial peace. To her, that peace looks like more trips with the boys and experiences they will remember long after anything you can buy. Her question for every family she meets is the same one she asks her own: what do you truly value most?
Off the clock, life runs on the boys' sports schedules, and she would not have it any other way. She also takes the boys to volunteer at the Faith and Grace Garden her dad started at the church she grew up in, growing free, healthy food for people who need it. That one fills her cup.
Honest, constructive communication, always. If something needs to change or you want it done differently, she would rather you say it than hold it in. You should never feel your voice is not being heard.