Thomas Mattingly has been an investment adviser representative at Big Sioux Financial since September 2023, and is not listed among the firm’s executive officers or direct owners. Thomas Mattingly holds a Social Studies degree from Minnesota State University Moorhead and a Master's Degree in Educational Administration from South Dakota State University.
Big Sioux Financial, Inc. is a Watertown, SD firm with $235M under management, 868 clients and 5 advisers across 2 offices, as of its February 2026 filing.
Tommy Mattingly is Associate Wealth Advisor of Big Sioux Wealth Management. Mattingly joined the firm in the summer of 2023 as an Associate Financial Advisor. Before joining, Mattingly spent the first 17 years of a career as a social studies teacher and multi-sport coach in Lake Benton, MN, Elkton, SD and Watertown, SD.
- Big Sioux Wealth ManagementCurrent– present · 3 yearsWatertown, SD · Adviser representative · Firm CRD 299593
Investment adviser representative registrations
Thomas Mattingly is registered as an investment adviser representative in South Dakota, since September 2023.
- South DakotaSince 14 September 2023
Examinations
| Exam | Name | Passed |
|---|---|---|
| Series 65 | Uniform Investment Adviser Law Examination | 1 September 2023 |
- Name
- Uniform Investment Adviser Law Examination
- Full name
- Thomas James Mattingly
- CRD
- 7780904
- Firm
- Big Sioux Financial · CRD 299593
- Office
- 1401 4TH ST NE, Watertown, SD 57201
- Registration
- Investment adviser registration
- In the industry since
- September 2023
- Disciplinary history
- Not yet shown here · SEC record
- Firm bio
- bigsiouxwealth.com
Where does Thomas Mattingly work?
Thomas Mattingly is an investment adviser representative registered through Big Sioux Financial, Inc. since September 2023, and is not listed among the firm’s executive officers or direct owners.
Is Thomas Mattingly a financial advisor?
Yes. Thomas Mattingly has a current investment-adviser registration in South Dakota, through Big Sioux Financial since September 2023.
How many years of experience does Thomas Mattingly have?
Thomas Mattingly has 3 years in the financial industry, since September 2023, across 1 adviser firm.
What exams has Thomas Mattingly passed?
Thomas Mattingly passed the Series 65 in September 2023.
Where is Thomas Mattingly based?
Thomas Mattingly’s registered office is in Watertown, SD.
Is Thomas Mattingly registered with FINRA?
No. Thomas Mattingly has no current broker registration.
How can I verify Thomas Mattingly’s record?
Search CRD 7780904 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes Thomas Mattingly’s full registration record.
