Grant Thornton 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 Grant Thornton LLP audit?
Grant Thornton LLP was the independent auditor for 781 retirement plan filings (816 audited filings including welfare plans) in plan year 2024, with clients in 40 states and territories — the #13 practice nationally by volume.
Practice at a glance
| Measure | Value |
|---|---|
| Firm EIN (as filed) | 36-6055558 |
| Retirement plan audits (401(k), 403(b), pension) | 781 |
| All audited filings (incl. welfare plans) | 816 |
| States and territories with clients | 40 |
| National rank by retirement plan volume | #13 of 3,956 |
| National rank, all audited filings (league-table basis) | #13 of 4,052 |
| Average client size (participants) | 5,006 |
| Largest client (participants) | 307,988 |
Rankings derived from U.S. Department of Labor Form 5500 filings, plan year 2024. Read the full methodology.
Where does Grant Thornton LLP audit plans?
| State | Plans audited | Share of practice |
|---|---|---|
| Illinois | 112 | 14.3% |
| New York | 97 | 12.4% |
| Wisconsin | 52 | 6.7% |
| Pennsylvania | 50 | 6.4% |
| Florida | 43 | 5.5% |
| Texas | 42 | 5.4% |
| New Jersey | 33 | 4.2% |
| Minnesota | 32 | 4.1% |
| California | 30 | 3.8% |
| Virginia | 27 | 3.5% |
| Missouri | 24 | 3.1% |
| Michigan | 23 | 2.9% |
| Washington, D.C. | 20 | 2.6% |
| Massachusetts | 20 | 2.6% |
| Connecticut | 17 | 2.2% |
| Georgia | 16 | 2.0% |
| Arizona | 15 | 1.9% |
| North Carolina | 15 | 1.9% |
| Ohio | 13 | 1.7% |
| Oklahoma | 12 | 1.5% |
| Tennessee | 12 | 1.5% |
| South Carolina | 11 | 1.4% |
| Maryland | 9 | 1.2% |
| Colorado | 7 | 0.9% |
| Oregon | 6 | 0.8% |
| Washington | 6 | 0.8% |
| Iowa | 5 | 0.6% |
| North Dakota | 5 | 0.6% |
| Alaska | 3 | 0.4% |
| Delaware | 3 | 0.4% |
| Indiana | 3 | 0.4% |
| Rhode Island | 3 | 0.4% |
| Kansas | 2 | 0.3% |
| Puerto Rico | 2 | 0.3% |
| Utah | 2 | 0.3% |
| Alabama | 1 | 0.1% |
| Arkansas | 1 | 0.1% |
| Kentucky | 1 | 0.1% |
| Louisiana | 1 | 0.1% |
| New Hampshire | 1 | 0.1% |
Largest concentration: Illinois (112 plans). State reflects the plan sponsor’s address, not the firm’s office locations.
What audit opinions does Grant Thornton LLP issue?
| Opinion type | Filings | Share |
|---|---|---|
| Unmodified (clean) | 729 | 93.3% |
| Qualified | 1 | 0.1% |
| Disclaimer | 51 | 6.5% |
| 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 Grant Thornton LLP
| Plan sponsor | State | Participants |
|---|---|---|
| Starbucks Corporation | WA | 307,988 |
| Walgreen Co. | IL | 272,420 |
| PWC US Group LLP | FL | 74,670 |
| KPMG LLP | NJ | 72,825 |
| Quest Diagnostics Clinical Laboratories, Inc. | NJ | 61,319 |
Comparing Grant Thornton LLP with other 401(k) audit firms?
See alternatives to Grant Thornton LLP for 401(k) audits: firms with comparable engagement volume and an overlapping state footprint, drawn from the same Form 5500 data.
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About this profile
This page is generated from public U.S. Department of Labor Form 5500 filings in which Grant Thornton LLP (EIN 36-6055558) is named as the plan’s independent qualified public accountant. Grant Thornton 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.