#1 Armanino LLP
Serves this area from San Ramon, CA (1692 mi)
Call (844) 582-8883 · Website401(k) & Benefit Plan Audit Firms in O'Fallon, MO
The top-ranked benefit plan audit firms serving O'Fallon, MO are Armanino LLP, Anders Minkler Huber & Helm LLP and Rubinbrown LLP. We list 28 benefit plan audit firms serving O'Fallon, MO. 28 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 O'Fallon, MO (St. Charles County). 28 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked benefit plan audit firms for O'Fallon
#2 Anders Minkler Huber & Helm LLP
Serves this area from St. Louis, MO (30 mi)Call (314) 655-5500 · Website#3 Rubinbrown LLP
Serves this area from Kansas City, MO (209 mi)Call (816) 472-1122 · Website#4 Forvis Mazars, LLP
Serves this area from Dallas, TX (534 mi)Call (303) 861-4545 · Website#5 Wipfli LLP
Serves this area from Wausau, WI (430 mi)Call (715) 845-3111 · Website#6 Cliftonlarsonallen LLP
Serves this area from Minneapolis, MN (447 mi)#7 Lopata, Flegel & Company, LLP
Serves this area from Town and Country, MO (16 mi)Call (314) 514-8881 · Website#8 Conner Ash P. C.
Serves this area from Creve Coeur, MO (17 mi)Call (314) 205-2510 · Website#9 Sfw Partners, LLC
Serves this area from MOCall (314) 569-3333 · Website#10 Grant Thornton LLP
Serves this area from Chicago, IL (269 mi)Call (312) 856-0200 · Website
18 more providers serving this area
- Uhy LLP, Sterling Heights, MI (484 mi)
- Kimberlin Company, PLLC, Chandler, AZ (1244 mi)
- J. Tenbrink And Associates, Office location not on file
- Holt & Patterson, LLC, Chesterfield, MO (10 mi)
- Kiefer Bonfanti & Co. LLP, Creve Coeur, MO (17 mi)
- Schmersahl Treloar & Co., Sunset Hills, MO (23 mi)
- Maher & Company, Clayton, MO (23 mi)
- Wade Stables P.C., Columbia, MO (90 mi)
- Kerber, Eck & Braeckel LLP, IL
- Rsm US LLP, Chicago, IL (269 mi)
- Wipfli LLP, Wauwatosa, WI (326 mi)
- Coulter & Justus, Knoxville, TN (413 mi)
- Foreman & Leathers, PC, Oklahoma City, OK (444 mi)
- A.c. Evans LLC, Office location not on file
- Abeles And Hoffman P.C., Olivette, MO (19 mi)
- Grabel, Schnieders, Hollman & Co, P, Kirkwood, MO (22 mi)
- Clifton Larson Allen, Clayton, MO (22 mi)
- Ernst & Young LLP, Clayton, MO (23 mi)
Request quotes
Frequently asked questions
How many benefit plan audit firms serve O'Fallon?
We list 28 benefit plan audit firms serving O'Fallon, MO: 0 based there and 28 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which benefit plan audit firms serve O'Fallon?
The top-ranked benefit plan audit firms serving O'Fallon, MO are Armanino LLP, Anders Minkler Huber & Helm LLP, Rubinbrown LLP, Forvis Mazars, LLP and Wipfli LLP. The full ranked list, with the official records each provider matched, is on this page.
Which benefit plan audit firms serving O'Fallon are verified against official records?
10 of the top 10 match an active official record: Armanino LLP (U.S. Department of Labor), Anders Minkler Huber & Helm LLP (U.S. Department of Labor), Rubinbrown LLP (U.S. Department of Labor), Forvis Mazars, LLP (U.S. Department of Labor) and Wipfli LLP (U.S. Department of Labor), and 5 more on this page. 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 .