About Gardiner + Company
<p>Founded in 1964, Gardiner + Company (Gardiner Thomsen) is an accounting and audit firm based in Charles City in north-central Iowa, serving clients across the Upper Midwest.</p> <p>The firm provides accounting, auditing, and consulting services for businesses and organizations. In addition to its Charles City headquarters, Gardiner + Company also has an office in Des Moines, giving it reach across the state and into nearby markets.</p> <p>Managing Partner Dennis M. Gardiner, CPA, has been with the firm since 1984. His work includes agriculture clients and the firm’s credit union practice. The firm operates in multiple states, including Iowa, Minnesota, and Nebraska.</p> <p>For companies that need an established audit team with experience across regulated and industry-specific engagements, Gardiner + Company’s long-standing Midwest footprint is a practical fit. More information is available at <a href="https://gardinercpa.com/">https://gardinercpa.com/</a>.</p> <ul> <li>Audit and accounting services from a firm founded in 1964</li> <li>Headquartered in Charles City, with an office in Des Moines</li> <li>Managing Partner: Dennis M. Gardiner, CPA (with the firm since 1984)</li> <li>Industry focus includes agriculture and credit unions</li> <li>Licensed across Iowa, Minnesota, and Nebraska</li> </ul>
Website: https://gardinercpa.com/
Founded: 1964
Office Locations
- Charles City, IA (Headquarters)
Accreditations & Certifications
- AICPA Member
- AICPA EBPAQC
Audit Statistics (2024)
- Total Plans Audited: 13
- Total AUM Audited: $262.7M
- 401(k): 13 plans, $262.7M 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 |
|---|---|---|---|
| UBG 401(K) - AGTEGRA | AGTEGRA COOPERATIVE, SD | $69M | 861 |
| CENTRAL FARM SERVICE 401(K) PLAN | CENTRAL FARM SERVICE, MN | $41M | 300 |
| UNITED FARMERS COOPERATIVE 401(K) PLAN | UNITED FARMERS COOPERATIVE, MN | $31M | 173 |
| COMMUNITY CHOICE CREDIT UNION 401(K) PLAN | COMMUNITY CHOICE CREDIT UNION, IA | $27M | 175 |
| UBG 401(K) - FARMERS COOPERATIVE | FARMERS COOPERATIVE, NE | $27M | 552 |
| 401(k) Retirement Plan | Healthcare Sponsor, MN | $26M | 234 |
| 401(k) Retirement Plan | Manufacturing Sponsor, SD | $16M | 127 |
| 401(k) Retirement Plan | Professional Services Sponsor, IA | $13M | 226 |
| 401(k) Retirement Plan | Technology Sponsor, SD | $9M | 73 |
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