Data / Investment advisers / South Dakota / Big Sioux Wealth Management
Big Sioux Wealth Management, Watertown, SD: $235 million AUM, SEC registered investment adviser
Big Sioux Wealth Management is an SEC registered investment adviser with its main office in Watertown, South Dakota and reports $235 million in regulatory assets under management in its Form ADV filed February 27, 2026. Its clients include high net worth individuals, individuals and corporations and other businesses. It is paid through a percentage of assets under management and hourly charges.
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- Registration
- SEC registered investment adviser
- CRD number
- 299593
- SEC file number
- 801-118350
- SEC status
- Approved, effective March 30, 2020
- Legal name
- Big Sioux Financial, Inc.
- Main office
- 1401 4th St Ne, Watertown, SD 57201
- Phone
- (605) 882-4280
- Website
- bigsiouxwealth.com
- Regulatory AUM
- $235,177,047 in the Form ADV filed February 27, 2026
- Discretionary AUM
- $228,162,927
- Non discretionary AUM
- $7,014,120
- Accounts
- 1,957
- Employees
- 7, of which 5 give investment advice
- Form of organization
- Corporation
- Paid through
- a percentage of assets under management, hourly charges
- Other offices
- 1
- Form ADV Item 11 disclosures
- None reported
- Latest Form ADV filing
- February 27, 2026
- SEC record
- Investment Adviser Public Disclosure
Clients
Client types the adviser reports in Form ADV item 5.D, with the AUM it attributes to each.
| Client type | Clients | AUM |
|---|---|---|
| High net worth individuals | 246 | $167.9 million |
| Individuals (other than high net worth individuals) | 597 | $61.1 million |
| Corporations or other businesses | 10 | $4.2 million |
| Charitable organizations | 15 | $2 million |
AUM in the SEC's monthly files
Each change in the AUM the adviser reported across the monthly SEC files held here, with the first file that shows the new value.
| First in the file of | AUM | Form ADV filed |
|---|---|---|
| March 2, 2026 | $235.2 million | February 27, 2026 |
| December 1, 2025 | $200.7 million | April 16, 2025 |
Other advisers in South Dakota
| Adviser | City | AUM | Private funds | Source |
|---|---|---|---|---|
| Standard Family Office, LLC | Sioux Falls | $1.01 billion | 2 | adviserinfo.sec.gov |
| Hi-Line Capital Management, LLC | Watertown | $756.6 million | Not listed | adviserinfo.sec.gov |
| Sage Capital Advisors, LLC | Sioux Falls | $672.8 million | Not listed | adviserinfo.sec.gov |
| RIA Advisory Group, LLC | Sioux Falls | $568.4 million | Not listed | adviserinfo.sec.gov |
| Lauer Capital Management LTD | Sioux Falls | $322.7 million | Not listed | adviserinfo.sec.gov |
| Aspen Private Advisors, LLC | Sioux Falls | $199.9 million | Not listed | adviserinfo.sec.gov |
| Hahn Financial Group | Sioux Falls | $188.7 million | Not listed | adviserinfo.sec.gov |
| KFG, LLC | Rapid City | $188.1 million | Not listed | adviserinfo.sec.gov |
Also on SpecStream
- Investment advisers in South Dakota
- Advisers with $100 million to $500 million in AUM
- Advisers serving high net worth individuals
- Advisers serving individuals
- Big Sioux Wealth Management on the SEC's adviser search
Updated November 7, 2026. Read from the SEC's Form ADV data files for investment advisers. Public data published by the US Securities and Exchange Commission (US government work). Advisers report these values themselves in Form ADV, and neither the SEC nor the states approve or guarantee them. AUM is regulatory assets under management as the adviser reported it in Form ADV item 5.F, which can differ from the AUM a firm quotes elsewhere. Exempt reporting advisers do not report AUM. Office address, phone and website are the adviser's main office as filed; a firm that files its main office as a private residence shows no street address or phone. An Item 11 disclosure is a reported event, not a finding about the firm today. Details for each firm are on the SEC's Investment Adviser Public Disclosure site. This page uses SEC data and is not endorsed or certified by the SEC. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.