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).
Showing top 20 of 33 plans serviced in 2025.