Big Sioux Financial, Inc.
- Regulatory AUM
- $235M
- Discretionary
- $228M
- Clients
- 868
- Avg AUM / client
- $271K
- Accounts
- 1,957
- Employees
- 7
AUM over time
Annual snapshots from Form ADV filings · as of Feb 27, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Individuals (non-high net worth) | 597 | $61.1M | 26.0% |
| High net worth individuals | 246 | $168M | 71.4% |
| Charitable organizations | 15 | $2.0M | 0.85% |
| Corporations and other businesses | 10 | $4.2M | 1.77% |
People (9)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Johnson, David, Walter | Co Owner | Aug 1988 (38y) | 25% – 50% | |
| Johnson, Janet, Hovey | Co Owner | Aug 1988 (38y) | 10% – 25% | |
| Johnson, Reid, Luther | Co Owner | Aug 1988 (38y) | 10% – 25% | |
| Johnson, Ethan, Paul | Co Owner | May 1990 (36y) | 10% – 25% | |
| Dustin Jay Padgett | Chief Compliance Officer/Division President | CFP | Jul 2019 (7y) | Less than 5% |
| Mc Kay William Parr | Registered representative | CFP | Aug 2019 (7y) | |
| Thomas James Mattingly | Registered representative | Sep 2023 (3y) | ||
| Connie Jo Streff | Registered representative | Jul 2025 (1y) | ||
| Aidynn Jae Lenards | Registered representative | Aug 2025 (1y) |
Undisclosed: 0% – 45% of the firm is not attributable from the filed Schedule A bands.
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 02/27/2026 | 1.03 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
- • Hourly charges
Services
- • Financial planning services
- • Portfolio management for individuals/small businesses
- • Pension consulting services
- • Selection of other advisers
- • Educational seminars/workshops
Custody
Reported custodians
- Charles Schwab & Co. $227M (97% of AUM) Feb 2026
- Vanguard $17.3M (9% of AUM) Nov 2023
- Ascensus, Inc. $5.4M (3% of AUM) Jan 2024
- American Funds/Cb&T $5.1M (3% of AUM) Jan 2023
- Pai $3.7M (2% of AUM) Jan 2023
- Ascensus Trust Company $1.2M (1% of AUM) Jan 2023
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports it does not have custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Feb 27, 2026.
View current Form ADV (SEC/IAPD) ↗