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Connor & Gallagher OneSource (CGO)
Connor & Gallagher OneSource (CGO)
Connor & Gallagher OneSource (CGO)
Rating: 5/5 - 9 reviews
Editor Verified
750 Warrenville Road, Suite 400, Lisle, IL 60532
(630) 687-6409
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ABOUT Connor & Gallagher OneSource (CGO)
Named the 2026 Top Independent Insurance Broker by Insurance Business Review. We combine strategic consulting, advanced data analytics, and hands-on administrative support to deliver sustainable, compliant, and cost-effective benefit programs. Our approach integrates day-to-day service execution with long-term planning to help employers reduce costs, improve outcomes, and maintain competitive benefits in a rapidly evolving regulatory environment.

About Connor & Gallagher OneSource (CGO)
- Founded in 1997
- Independent insurance broker
- Scored in the top percentile of client satisfaction scores (Net Promoter Score/NPS) 4 years in a row - 2023, 2024, 2025, & 2026.
- Based in Illinois but serve companies and their employees across the U.S.

CGO is a full-service insurance broker that partners with organizations in the areas of insurance, employee benefits, HR, recruitment process outsourcing, payroll and 401k. We have in-house consultants and customer service teams specializing in each field.
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PRODUCTS BY Connor & Gallagher OneSource (CGO)
We start with a thorough review of your company and develop a risk management strategy based on our analysis and niche knowledge of your industry, market forces and your preference to transfer or retain your risks. In addition to guarding against your company’s risks, CGO takes steps to... Read More
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We combine strategic consulting, advanced data analytics, and hands-on administrative support to deliver sustainable, compliant, and cost-effective benefit programs. Our approach integrates day-to-day service execution with long-term planning to help employers reduce costs, improve outcomes, and... Read More
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We Aim to Build a Stronger Retirement Plan for Your Company in 5 Steps CGO specializes in employer sponsored retirement plan programs and strategies. We are an independent financial services firm, which allows us to implement cost-effective and robust retirement plan solutions for our... Read More
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CONTENT BY Connor & Gallagher OneSource (CGO)
Should Your Organization Move to a PEP? A Side-by-Side Comparison with Traditional 401(k)s
Should Your Organization Move to a PEP? A Side-by-Side Comparison with Traditional 401(k)s
By Connor & Gallagher OneSource (CGO)
Should you move your company retirement plan into a Pooled Employer Plan (PEP), or keep a traditional 401(k)? PEPs were designed to let unrelated employers participate in one shared 401(k) structure, with a pooled plan provider stepping in as plan sponsor, named fiduciary, and plan...
How Musculoskeletal Claims Are Killing Your Group Health Plan (& What To Do About It)
How Musculoskeletal Claims Are Killing Your Group Health Plan (& What To Do About It)
By Connor & Gallagher OneSource (CGO)
Musculoskeletal claims can account for 15% to 30% of total medical spend. That makes them one of the top drivers of your overall group health insurance costs. Here's what you can do about it.
Why January is the Best Time to Reset Your Company 401(K) Plan Governance
Why January is the Best Time to Reset Your Company 401(K) Plan Governance
By Connor & Gallagher OneSource (CGO)
The start of a new year is more than a calendar change — it’s an opportunity for plan sponsors to strengthen fiduciary governance and reduce risk. For many companies, January is the only time all year when retirement plan governance gets a fresh look.