Mathieson, Moyski, Austin & Co LLP
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 Mathieson, Moyski, Austin & Co LLP audit?
Mathieson, Moyski, Austin & Co LLP was the independent auditor for 9 retirement plan filings in plan year 2024, with clients in 2 states and territories — the #931 practice nationally by volume.
Practice at a glance
| Measure | Value |
|---|---|
| Firm EIN (as filed) | 36-3480013 |
| Retirement plan audits (401(k), 403(b), pension) | 9 |
| All audited filings (incl. welfare plans) | 9 |
| States and territories with clients | 2 |
| National rank by retirement plan volume | #931 of 3,956 |
| National rank, all audited filings (league-table basis) | #959 of 4,052 |
| Average client size (participants) | 422 |
| Largest client (participants) | 1,350 |
Rankings derived from U.S. Department of Labor Form 5500 filings, plan year 2024. Read the full methodology.
Where does Mathieson, Moyski, Austin & Co LLP audit plans?
| State | Plans audited | Share of practice |
|---|---|---|
| Illinois | 5 | 55.6% |
| Texas | 4 | 44.4% |
Largest concentration: Illinois (5 plans). State reflects the plan sponsor’s address, not the firm’s office locations.
What audit opinions does Mathieson, Moyski, Austin & Co LLP issue?
| Opinion type | Filings | Share |
|---|---|---|
| Unmodified (clean) | 8 | 88.9% |
| Qualified | 0 | 0.0% |
| Disclaimer | 1 | 11.1% |
| 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 Mathieson, Moyski, Austin & Co LLP
| Plan sponsor | State | Participants |
|---|---|---|
| Alfred Benesch & Company | IL | 1,350 |
| Uropartners, LLC | IL | 638 |
| Pembina US Corporation | TX | 295 |
| Giant Steps Illinois, Inc. | IL | 273 |
| Bartlett Learning Center, Inc. | IL | 263 |
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About this profile
This page is generated from public U.S. Department of Labor Form 5500 filings in which Mathieson, Moyski, Austin & Co LLP (EIN 36-3480013) is named as the plan’s independent qualified public accountant. Mathieson, Moyski, Austin & Co LLP 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.