About Ketel Thorstenson, LLP
<p>Founded in 1936, Ketel Thorstenson, LLP is a CPA firm with 126 employees based in Rapid City in western South Dakota, serving clients across the Black Hills region.</p> <p>The firm provides accounting, tax, and advisory services for businesses and individuals. Its audit work includes retirement plan engagements, with Stephen Schacht listed as a key contact and auditor.</p> <p>Clients use Ketel Thorstenson for practical support such as tax planning, audit services, and business consulting. The team’s long operating history and in-house mix of audit and tax staff makes it a fit for organizations that want both day-to-day accounting help and formal assurance work from the same firm.</p> <p>More details are available at <a href="https://www.ktllp.cpa/" target="_blank" rel="noopener">https://www.ktllp.cpa/</a>.</p> <ul> <li>Type: <a href="/auditors/401k">401(k) auditors</a></li> <li>Founded: 1936</li> <li>Employees: 126</li> <li>Location: Rapid City, South Dakota (Black Hills area)</li> <li>Services: accounting, tax, advisory, and audit</li> </ul>
Website: https://www.ktllp.cpa/
Founded: 1936
Employees: 126
Office Locations
- Rapid City, SD
Accreditations & Certifications
- AICPA EBPAQC
- AICPA Member
Audit Statistics (2024)
- Total Plans Audited: 35
- Total AUM Audited: $862.0M
- 401(k): 35 plans, $862.0M AUM
Plans Serviced (2025)
Largest plans where this firm is listed as a service provider (Schedule C) or IQPA (Schedule H) on the most recent filings (From Form 5500).
| Plan | Sponsor | Assets | Participants |
|---|---|---|---|
| RAPID CITY MEDICAL CENTER 401(K) PLAN | RAPID CITY MEDICAL CENTER, LLP, SD | $75M | 437 |
| RE/SPEC INC. EMPLOYEE 401(K) RETIREMENT PLAN | RE/SPEC INC., SD | $67M | 487 |
| BLACK HILLS FEDERAL CREDIT UNION 401(K) PLAN | BLACK HILLS FEDERAL CREDIT UNION, SD | $60M | 372 |
| BANKWEST 401(K) PLAN | BANKWEST, INC., SD | $59M | 357 |
| SOUTH DAKOTA ASSOCIATIONS OF COMMUNITY-BASED HUMAN SERVICES RETIREMENT PLAN | SOUTH DAKOTA COUNCIL OF COMMUNITY BEHAVIORAL HEA, SD | $53M | 1,810 |
| 401(k) Retirement Plan | Healthcare Sponsor, SD | $51M | 463 |
| 401(k) Retirement Plan | Manufacturing Sponsor, SD | $46M | 253 |
| 401(k) Retirement Plan | Professional Services Sponsor, SD | $45M | 568 |
| 401(k) Retirement Plan | Technology Sponsor, SD | $40M | 538 |
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