# Reilly, Penner & Benton LLP Source: https://planprovider.pro/provider/reilly-penner-and-benton-llp > Founded in 1907, Reilly, Penner & Benton LLP is the oldest registered CPA firm in Wisconsin. From its Milwaukee office, the firm works with nonprofits an… Employee Benefit Plan Auditor Milwaukee, WI ## About Reilly, Penner & Benton LLP

Founded in 1907, Reilly, Penner & Benton LLP is the oldest registered CPA firm in Wisconsin. From its Milwaukee office, the firm works with nonprofits and businesses across the Milwaukee metro and throughout southeastern and south-central Wisconsin.

RPB provides public accounting services with a focus on audit and attestation work, along with tax preparation, tax planning, consulting, and financial reviews. Organizations use the firm for help with financial statements, compliance-related reporting, and year-round tax work.

One clear differentiator is longevity: as Wisconsin’s oldest registered CPA firm, RPB brings more than a century of continuity and institutional knowledge to client relationships.

For retirement plan-related needs, employers looking for 401(k) auditors can contact Patrick Hoffert at (414) 271-7800 or visit www.rpb.biz.

Website: [https://www.www.rpb.biz](https://www.www.rpb.biz) Founded: 1907 ## Office Locations - Milwaukee, WI ## Accreditations & Certifications - AICPA EBPAQC - AICPA Member ## Audit Statistics (2024) - Total Plans Audited: 67 - Total AUM Audited: $4.2B - 401(k): 67 plans, $4.2B AUM ## Plans Serviced (2024) Largest plans where this firm is listed as a service provider (Schedule C) or IQPA (Schedule H) on the most recent filings (From Form 5500). | Plan|Sponsor|Assets|Participants| | A O SMITH RETIREMENT SECURITY PLAN|A O SMITH CORPORATION, WI|$618M|4,854| | ALLETE AND AFFILIATED COMPANIES RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN|ALLETE, INC., MN|$606M|1,633| | RITE-HITE RETIREMENT SAVINGS PLAN|RITE-HITE HOLDING CORPORATION, WI|$494M|2,381| | ALLETE & AFFILIATED COMPANIES RETIREMENT PLAN C|ALLETE, INC. & AFFILIATED COMPANIES, MN|$422M|143| | EVERSANA 401(K) PLAN|EVERSANA, KS|$348M|3,647| | ALLETE AND AFFILIATED COMPANIES RETIREMENT PLAN B|ALLETE, INC. & AFFILIATED COMPANIES, MN|$188M|276| | HUSCO INTERNATIONAL, INC. SAVINGS PLAN|HUSCO INTERNATIONAL, INC., WI|$128M|726| | LESAFFRE INTERNATIONAL CORPORATION RETIREMENT SAVINGS PLAN|LESAFFRE INTERNATIONAL CORPORATION, WI|$118M|631| | CENTROMOTION 401(K) PLAN|ENGINEERED COMPONENTS & SYSTEMS, LLC D/B/A CENTROMOTION, WI|$88M|768| | DERSE, INC. RETIREMENT SAVINGS PLAN|DERSE INC, WI|$72M|475| | BANK FIRST RETIREMENT PLAN|BANK FIRST CORPORATION, WI|$68M|366| | DYNATECT MANUFACTURING, INC. RETIREMENT & EMPLOYEE SAVINGS PLAN|DYNATECT MANUFACTURING, INC., WI|$46M|443| | IN-PLACE MACHINING COMPANY 401(K) PLAN|IN-PLACE MACHINING COMPANY, LLC, WI|$44M|424| | HENTZEN COATINGS, INC. 401(K) AND PROFIT SHARING PLAN|HENTZEN COATINGS, INC., WI|$39M|328| | AUER STEEL & HEATING SUPPLY COMPANY RETIREMENT|AUER STEEL & HEATING SUPPLY CO., WI|$39M|298| | MANER, COSTERISAN & ELLIS, P.C. PROFIT SHARING PLAN AND 401(K) CASH ACCUMULATION PLAN|MANER COSTERISAN & ELLIS PC, PA|$37M|184| | BADER RUTTER RETIREMENT PLAN|BADER RUTTER & ASSOCIATES, INC., WI|$35M|164| | HALQUIST STONE COMPANY, INC. 401(K) PROFIT SHARING PLAN|HALQUIST STONE COMPANY, INC., WI|$32M|245| | WILO USA LLC RETIREMENT PLAN|WILO USA LLC, WI|$31M|451| | MACHINE SERVICE, INC. PROFIT SHARING PLAN|MACHINE SERVICE, INC., WI|$26M|162| Showing top 20 of 66 plans serviced in 2024. ## Other Employee Benefit Plan Auditors in WI - [Quandt Berndt & Company LLC](https://planprovider.pro/provider/quandt-berndt-and-company-llc) - Waukesha, WI - [Ritz Holman LLP](https://planprovider.pro/provider/ritz-holman-llp) - Milwaukee, WI - [KerberRose SC](https://planprovider.pro/provider/kerberrose-sc) - Shawano, WI - [Wegner CPAs, LLP](https://planprovider.pro/provider/wegner-cpas-llp) - Madison, WI - [Baker Tilly US LLP](https://planprovider.pro/provider/baker-tilly-us-llp) - Madison, WI - [Hawkins Ash CPAs, LLP](https://planprovider.pro/provider/hawkins-ash-cpas-llp) - La Crosse, WI - [Gordon J. Maier & Company, LLP](https://planprovider.pro/provider/gordon-j-maier-and-company-llp) - Racine, WI - [Lucida LLC](https://planprovider.pro/provider/lucida-llc) - Brookfield, WI - [Vrakas CPAs + Advisors](https://planprovider.pro/provider/vrakas-cpas-advisors) - Brookfield, WI - [Engelson and Associates, Ltd.](https://planprovider.pro/provider/engelson-and-associates-ltd) - La Crosse, WI [View full interactive profile on PlanProvider.Pro](https://planprovider.pro/provider/reilly-penner-and-benton-llp) © 2026 PlanProvider.Pro