About Maner Costerisan PC
<p>Founded in 1906, Maner Costerisan PC has worked with organizations across Michigan and the broader Great Lakes region for more than a century.</p> <p>Based in Lansing in the Mid-Michigan area, the firm is a public accounting practice with technology and business consulting services. Its teams are organized by industry, with groups focused on Affordable Housing, Cannabis, Construction, Education, Employee Benefit Plans, Government, Healthcare, High Net Worth, Manufacturing, Nonprofit, and Small & Mid-Size Businesses.</p> <p>For retirement plan sponsors, Maner Costerisan’s Employee Benefit Plans team supports plan-related accounting needs and works with organizations that need help staying current as requirements change. Edward (Trey) L Williams III is a contact for firms looking to connect with the Employee Benefit Plans practice.</p> <p>What sets Maner Costerisan apart is its long operating history paired with dedicated, industry-aligned teams, which can be helpful for plan sponsors that want an audit firm familiar with their sector.</p> <ul> <li>Employee benefit plan audit support from <a href="/auditors/401k">401(k) auditors</a></li> <li>Public accounting services</li> <li>Technology services for finance and operations teams</li> <li>Business consulting support for organizations in regulated industries</li> </ul>
Website: https://manercpa.com/
Founded: 1906
Office Locations
- Lansing, MI
Accreditations & Certifications
- AICPA EBPAQC
- AICPA Member
Audit Statistics (2024)
- Total Plans Audited: 62
- Total AUM Audited: $2.7B
- 401(k): 62 plans, $2.7B 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 |
|---|---|---|---|
| AUTO-OWNERS INSURANCE COMPANY RETIREMENT INCOME PLAN | AUTO-OWNERS INSURANCE COMPANY, MI | $919M | 5,457 |
| AUTO-OWNERS INSURANCE COMPANY RETIREMENT SAVINGS PLAN | AUTO-OWNERS INSURANCE COMPANY, MI | $864M | 7,012 |
| MEA-MESSA-MEA FINANCIAL SERVICES STAFF RETIREMENT PLAN & TRUST | MICHIGAN EDUCATION ASSOCIATION, MI | $689M | 536 |
| DICKINSON WRIGHT PLLC RETIREMENT AND 401K SAVINGS | DICKINSON WRIGHT PLLC, MI | $305M | 870 |
| FARM BUREAU EMPLOYEES' RETIREMENT PLAN | MICHIGAN FARM BUREAU, MI | $275M | 250 |
| 401(k) Retirement Plan | Healthcare Sponsor, MI | $254M | 744 |
| 401(k) Retirement Plan | Manufacturing Sponsor, MI | $231M | 1,156 |
| 401(k) Retirement Plan | Professional Services Sponsor, MI | $148M | 703 |
| 401(k) Retirement Plan | Technology Sponsor, MI | $143M | 1,284 |
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