Lewis & Knopf, CPAS
Employee benefit plan audit practice profile, built from plan year 2024 Form 5500 filings.
Last updated · Source data: plan year 2024 Form 5500 filings
How many 401(k) plans does Lewis & Knopf, CPAS audit?
Lewis & Knopf, CPAS was the independent auditor for 10 retirement plan filings in plan year 2024, with clients in 2 states and territories — the #854 practice nationally by volume.
Practice at a glance
| Measure | Value |
|---|---|
| Firm EIN (as filed) | 38-3205662 |
| Retirement plan audits (401(k), 403(b), pension) | 10 |
| All audited filings (incl. welfare plans) | 10 |
| States and territories with clients | 2 |
| National rank by retirement plan volume | #854 of 3,956 |
| National rank, all audited filings (league-table basis) | #880 of 4,052 |
| Average client size (participants) | 400 |
| Largest client (participants) | 947 |
Rankings derived from U.S. Department of Labor Form 5500 filings, plan year 2024. Read the full methodology.
Where does Lewis & Knopf, CPAS audit plans?
| State | Plans audited | Share of practice |
|---|---|---|
| Michigan | 9 | 90.0% |
| Kentucky | 1 | 10.0% |
Largest concentration: Michigan (9 plans). State reflects the plan sponsor’s address, not the firm’s office locations.
What audit opinions does Lewis & Knopf, CPAS issue?
| Opinion type | Filings | Share |
|---|---|---|
| Unmodified (clean) | 10 | 100.0% |
| Qualified | 0 | 0.0% |
| Disclaimer | 0 | 0.0% |
| Adverse | 0 | 0.0% |
As coded on Schedule H. A disclaimer here usually reflects the legacy limited-scope reporting convention (now the ERISA Section 103(a)(3)(C) election), not a failed audit — see the methodology.
Largest plans audited by Lewis & Knopf, CPAS
| Plan sponsor | State | Participants |
|---|---|---|
| Baker College Professional Services, Inc. | MI | 947 |
| Providers Staffing, Inc. | MI | 401 |
| Shively Bros., Inc. | MI | 342 |
| Denso Air Systems Michigan, Inc. | KY | 330 |
| Flat River Group | MI | 255 |
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<a href="https://401kauditscout.com/firm/lewis-and-knopf-cpas/"><img src="https://401kauditscout.com/badges/lewis-and-knopf-cpas.svg" alt="Lewis & Knopf, CPAS: ranked #880 for 401(k) plan audits by 401k Audit Scout, 2026" width="360" height="80" loading="lazy"></a>Please keep the badge unmodified and linked to this profile. Rank reflects engagement volume as filed, not audit quality — see the methodology.
About this profile
This page is generated from public U.S. Department of Labor Form 5500 filings in which Lewis & Knopf, CPAS (EIN 38-3205662) is named as the plan’s independent qualified public accountant. Lewis & Knopf, CPAS did not supply, review, or endorse this information, and inclusion is not a recommendation. Filing data can contain sponsor-entered errors; corrections are welcome via the about page.