# Olsen Thielen & Co., Ltd.
Source: https://planprovider.pro/provider/olsen-thielen-and-co-ltd
> Founded in 2012, Olsen Thielen & Co., Ltd. operates from Roseville in the Twin Cities metro, with its headquarters at 2675 Long Lake Road. The firm is a…
Employee Benefit Plan Auditor
Roseville, MN
## About Olsen Thielen & Co., Ltd.
Founded in 2012, Olsen Thielen & Co., Ltd. operates from Roseville in the Twin Cities metro, with its headquarters at 2675 Long Lake Road.
The firm is a Certified Public Accountants & Advisors practice that handles assurance work alongside individual and corporate tax. It also provides financial planning, business consulting, and technology-related support for organizations that want accounting help and day-to-day advisory services in one place.
For retirement plan sponsors looking for 401(k) auditors and other assurance support, Olsen Thielen brings regional experience across Minnesota and the Upper Midwest. Clients work with a local team rather than a distant national office.
What sets Olsen Thielen apart is its focus on internal development and an inclusive workplace culture, built around the idea that investing in employee growth improves the consistency and quality of client work.
- Assurance services, including retirement plan audit support
- Individual and corporate tax services
- Financial planning
- Business consulting
- Technology-focused advisory services
Website: [https://www.otcpas.com/](https://www.otcpas.com/)
Founded: 2012
## Office Locations
- Roseville, MN (Headquarters)
## Accreditations & Certifications
- AICPA EBPAQC
- AICPA Member
## Audit Statistics (2024)
- Total Plans Audited: 97
- Total AUM Audited: $14.2B
- 401(k): 97 plans, $14.2B 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|
| RBC- U.S.A. RETIREMENT AND SAVINGS PLAN|RBC USA HOLDCO CORPORATION, MN|$4.3B|10,111|
| ECOLAB SAVINGS PLAN AND ESOP|ECOLAB INC., MN|$4.2B|19,704|
| ECOLAB PENSION PLAN|ECOLAB INC., MN|$1.7B|17,433|
| HBI 401(K) RETIREMENT SAVINGS PLAN|HUBBARD BROADCASTING, INC., MN|$384M|1,712|
| STARKEY LABORATORIES, INC. EMPLOYEE RETIREMENT PLAN|STARKEY LABORATORIES, INC., MN|$301M|1,473|
| SUN COUNTRY, INC. 401(K) PROFIT SHARING PLAN|SUN COUNTRY, INC., MN|$247M|3,207|
| ECMC GROUP 401(K) PLAN|ECMC GROUP, INC., MN|$190M|419|
| PERFORCE SOFTWARE, INC. 401(K) PLAN|PERFORCE SOFTWARE, INC., MN|$187M|817|
| NORAN NEUROLOGICAL CLINIC, P. A. 401(K) PROFIT SHARING PLAN|NORAN NEUROLOGICAL CLINIC, P.A., MN|$154M|242|
| BERRYDUNN 401(K) PROFIT SHARING PLAN|BERRY DUNN MCNEIL & PARKER, LLC, ME|$139M|826|
| IP CORPORATION 401(K) PLAN|IP CORPORATION, MN|$116M|644|
| UVP MANAGEMENT, LLC 401(K) PROFIT SHARING PLAN|UVP MANAGEMENT, LLC, TX|$93M|1,459|
| GRAND RIVER MEDICAL GROUP RETIREMENT PLAN|DUBUQUE INTERNAL MEDICINE PC DBA GRAND RIVER MEDICAL GROUP, IA|$91M|332|
| THE FELHABER, LARSON, FENLON & VOGT, P.A. EMPLOYEE SAVINGS & PROFIT SHARING PLAN|FELHABER, LARSON, FENLON,VOGT, P.A., MN|$86M|73|
| HOWDEN RE 401(K) & PROFIT SHARING PLAN|TIGERRISK PARTNERS, LLC, CT|$80M|356|
| UPLAND HILLS HEALTH 403(B) RETIREMENT PLAN|UPLAND HILLS HEALTH, INC., WI|$78M|657|
| ORA ORTHOPEDICS, P.C. 401(K) SAVINGS PLAN|ORA ORTHOPEDICS, P.C., IA|$77M|399|
| ENTIRA FAMILY CLINICS 401(K) PROFIT SHARING PLAN|FAMILY HEALTHSERVICES MINNESOTA, P.A., MN|$72M|273|
| HONKAMP KRUEGER & CO 401(K) PROFIT SHARING PLAN AND TRUST|HONKAMP KRUEGER & CO., P.C., IA|$66M|347|
| FIDUCIARY COUNSELLING, INC. DEFINED CONTRIBUTION RETIREMENT PLAN|FIDUCIARY COUNSELLING, INC., MN|$63M|105|
Showing top 20 of 83 plans serviced in 2025.
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