Olsen Thielen & Co., Ltd.

Employee Benefit Plan Auditor

Roseville, MN

About Olsen Thielen & Co., Ltd.

<p>Founded in 2012, Olsen Thielen &amp; Co., Ltd. operates from Roseville in the Twin Cities metro, with its headquarters at 2675 Long Lake Road.</p> <p>The firm is a Certified Public Accountants &amp; 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.</p> <p>For retirement plan sponsors looking for <a href="/auditors/401k">401(k) auditors</a> 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.</p> <p>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.</p> <ul> <li>Assurance services, including retirement plan audit support</li> <li>Individual and corporate tax services</li> <li>Financial planning</li> <li>Business consulting</li> <li>Technology-focused advisory services</li> </ul>

Website: 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).

PlanSponsorAssetsParticipants
RBC- U.S.A. RETIREMENT AND SAVINGS PLANRBC USA HOLDCO CORPORATION, MN$4.3B10,111
ECOLAB SAVINGS PLAN AND ESOPECOLAB INC., MN$4.2B19,704
ECOLAB PENSION PLANECOLAB INC., MN$1.7B17,433
HBI 401(K) RETIREMENT SAVINGS PLANHUBBARD BROADCASTING, INC., MN$384M1,712
STARKEY LABORATORIES, INC. EMPLOYEE RETIREMENT PLANSTARKEY LABORATORIES, INC., MN$301M1,473
SUN COUNTRY, INC. 401(K) PROFIT SHARING PLANSUN COUNTRY, INC., MN$247M3,207
ECMC GROUP 401(K) PLANECMC GROUP, INC., MN$190M419
PERFORCE SOFTWARE, INC. 401(K) PLANPERFORCE SOFTWARE, INC., MN$187M817
NORAN NEUROLOGICAL CLINIC, P. A. 401(K) PROFIT SHARING PLANNORAN NEUROLOGICAL CLINIC, P.A., MN$154M242
BERRYDUNN 401(K) PROFIT SHARING PLANBERRY DUNN MCNEIL & PARKER, LLC, ME$139M826
IP CORPORATION 401(K) PLANIP CORPORATION, MN$116M644
UVP MANAGEMENT, LLC 401(K) PROFIT SHARING PLANUVP MANAGEMENT, LLC, TX$93M1,459
GRAND RIVER MEDICAL GROUP RETIREMENT PLANDUBUQUE INTERNAL MEDICINE PC DBA GRAND RIVER MEDICAL GROUP, IA$91M332
THE FELHABER, LARSON, FENLON & VOGT, P.A. EMPLOYEE SAVINGS & PROFIT SHARING PLANFELHABER, LARSON, FENLON,VOGT, P.A., MN$86M73
HOWDEN RE 401(K) & PROFIT SHARING PLANTIGERRISK PARTNERS, LLC, CT$80M356
UPLAND HILLS HEALTH 403(B) RETIREMENT PLANUPLAND HILLS HEALTH, INC., WI$78M657
ORA ORTHOPEDICS, P.C. 401(K) SAVINGS PLANORA ORTHOPEDICS, P.C., IA$77M399
ENTIRA FAMILY CLINICS 401(K) PROFIT SHARING PLANFAMILY HEALTHSERVICES MINNESOTA, P.A., MN$72M273
HONKAMP KRUEGER & CO 401(K) PROFIT SHARING PLAN AND TRUSTHONKAMP KRUEGER & CO., P.C., IA$66M347
FIDUCIARY COUNSELLING, INC. DEFINED CONTRIBUTION RETIREMENT PLANFIDUCIARY COUNSELLING, INC., MN$63M105

Showing top 20 of 83 plans serviced in 2025.

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