Office Oak Brook

Regency Towers, Suite 1000E
1415 W. 22nd Street
Oak Brook, IL 60523-2074
O 630.703.7444 | F 630.581.8301

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Overview 

ORBA’s Oak Brook Office is conveniently located in Regency Towers. Our team of dedicated professionals is committed to providing exceptional audit, tax and advisory services to businesses, individuals and not-for-profit organizations. Whether you’re a local entrepreneur, a mid-sized company or an established corporation, we’re here to support your financial success. Explore our comprehensive suite of services and contact us to discover how ORBA can become your trusted partner. 

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2025 Workplace Culture Excellence Award BDO Alliance USA
BEYOND THE TOP 100:FIRMS TO WATCH Accounting Today, 2014-2025 Rankings
2024LARGEST ACCOUNTING FIRMS Crain's Chicago Business, 2011-2024 Rankings
Top 200public accounting firms INSIDE Public Accounting, 2013-2024 Rankings
2024 Top WorkplacesCULTURE EXCELLENCE AWARD - EMPLOYEE WELL-BEING & PROFESSIONAL DEVELOPMENT Energage, 2021-2024 Rankings
2024Top Workplaces USA USA Today, 2024 Ranking
TOP WORKPLACES USA Energage, 2021-2023 Rankings
TOPWORKPLACES The Chicago Tribune 2010-2016; 2020-2024 Rankings
GREAT LAKESRegional Leader Accounting Today, 2012-2025 Rankings
over47 years Of High Performing Service To Clients In Chicago & Beyond

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Firm News

08.11.25

ORBA Ranked as a 2025 Top 200 Firm by INSIDE Public Accounting
CHICAGO — ORBA, one of Chicago’s largest public accounting firms, has once again been recognized as a 2025 IPA Top 200 Firm by INSIDE Public Accounting (IPA). This marks the eleventh time since 2013 that ORBA has made the list of the country’s top firms. In the IPA’s annual report, ORBA is ranked #113, climbing five spots higher than last year, and is the highest ranked of the six Illinois firms on the Top 200 list.

Oak Brook

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Firm News

08.11.25

ORBA Ranked as a 2025 Top 200 Firm by INSIDE Public Accounting
CHICAGO — ORBA, one of Chicago’s largest public accounting firms, has once again been recognized as a 2025 IPA Top 200 Firm by INSIDE Public Accounting (IPA). This marks the eleventh time since 2013 that ORBA has made the list of the country’s top firms. In the IPA’s annual report, ORBA is ranked #113, climbing five spots higher than last year, and is the highest ranked of the six Illinois firms on the Top 200 list.

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seminars & events

Guides

ORBA will gladly provide you with hard copies of the useful guides listed below. Select which guides you would like to receive and submit the form below.

  • Tax Pocket Guide
  • Tax Planning Guide
  • Records Retention Schedule
  • Auto, Travel & Business Log

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