#1Ketel Thorstenson, LLP
Serves this area from Rapid City, SD (176 mi)
401(k) & Benefit Plan Audit Firms in Sioux County, ND
The top-ranked benefit plan audit firms serving Sioux County, ND are Ketel Thorstenson, LLP, Brady Martz, PLLC and Wipfli LLP. We list 3 benefit plan audit firms serving Sioux County, ND. 3 of the providers shown match an active record from U.S. Department of Labor, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
401(k) & Benefit Plan Audit Firms serving Sioux County, ND. 3 providers, 3 of the top 3 verified against federal or state records. Registry records checked on 2026-11-04.
Top 3 ranked benefit plan audit firms for Sioux County
| # | Provider | Verified records | Based in | Phone |
|---|---|---|---|---|
| 1 | Ketel Thorstenson, LLP | Named auditor on 38 Form 5500 benefit plan filings (plan year 2024) | Rapid City, SD (176 mi) | (605) 342-5630 |
| 2 | Brady Martz, PLLC | Named auditor on 13 Form 5500 benefit plan filings (plan year 2024) | Grand Forks, ND (228 mi) | — |
| 3 | Wipfli LLP | Named auditor on 781 Form 5500 benefit plan filings (plan year 2024) | Wausau, WI (559 mi) | (715) 845-3111 |
#2Brady Martz, PLLC
Serves this area from Grand Forks, ND (228 mi)#3Wipfli LLP
Serves this area from Wausau, WI (559 mi)
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Frequently asked questions
How many benefit plan audit firms serve Sioux County?
We list 3 benefit plan audit firms serving Sioux County, ND: 0 based there and 3 serving it from nearby. 3 of the top 3 match an active federal or state record, checked on 2026-11-04.
Which benefit plan audit firms serve Sioux County?
The top-ranked benefit plan audit firms serving Sioux County, ND are Ketel Thorstenson, LLP, Brady Martz, PLLC and Wipfli LLP. The full ranked list, with the official records each provider matched, is on this page.
Which benefit plan audit firms serving Sioux County are verified against official records?
3 of the top 3 match an active official record: Ketel Thorstenson, LLP (U.S. Department of Labor), Brady Martz, PLLC (U.S. Department of Labor) and Wipfli LLP (U.S. Department of Labor). Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
When does a 401(k) plan need an audit?
Generally when a plan has 100 or more participants with account balances at the start of the plan year; Form 5500 must then include an independent qualified public accountant's report. Confirm with your plan advisor.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .
Communities served
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