Oak Brook, Illinois employer health plans: what they cost and who gets paid
Updated plan year 2024, the most recent complete year
55 employers in Oak Brook, Illinois filed health plans with 100 or more participants for plan year 2024, covering 176,489 participants. They reported $145M in insurance premiums and $8.4M in broker commissions and fees. Against 2023, premiums were up 7.6% and broker pay rose 12.9%.
Funding: 11 fully insured · 16 self-funded · 28 mixed. 44 of 55 plans pay at least some medical claims from the employer's own assets.
Largest employer health plans in Oak Brook
Oak Brook employers reporting the most insurance premium across every Schedule A contract, with what they paid brokers.
Source: DOL Form 5500 Schedule A, plan year 2024; employers are grouped by the sponsor's mailing city as filed. Self-funded employers show only stop-loss and ancillary premium.
Who gets paid
Commissions and fees reported by Oak Brook employers, with the number of employer plans naming each broker.
| Broker | Commissions + fees | Plans |
|---|---|---|
| Marsh McLennan Agency | $1,701,382 | 2 |
| Eoi Service Company, Inc. | $1,290,438 | 1 |
| HUB International | $602,873 | 8 |
| Alliant Insurance Services | $557,126 | 4 |
| Kistler Tiffany Benefits Gen Agency | $433,779 | 1 |
| Knight Rigby LLC | $365,668 | 1 |
| Conner Strong & Buckelew | $348,825 | 2 |
| Brown & Brown | $324,053 | 5 |
| AssuredPartners | $287,818 | 3 |
| Sequoia | $269,608 | 1 |
Largest medical carriers
Medical premium written for these employers.
Oak Brook against Illinois and the U.S.
Medians over the same definitions on every BenefitsLedger page: commission rate on commission-paying, fully insured medical plans; broker pay per employer that disclosed any; medical premium per covered person.
| Oak Brook | Illinois | United States | |
|---|---|---|---|
| Employer plans | 55 | 2,831 | 58,547 |
| Median commission rate | n/a | 1.5% | 3.8% |
| Middle half of rates | n/a | 0.4% – 3.1% | 2.7% – 5.0% |
| Median broker pay per employer | $100,996 | $85,899 | $72,628 |
| Medical premium per covered person | n/a | $6,708 | $7,274 |
| Plans reporting no commission | 2 | 30 | 933 |
Year over year. In plan year 2023, 51 Oak Brook employers reported $134M in premiums and $7.5M in broker pay for 56,723 participants; in 2024 it was $145M and $8.4M for 176,489 participants (premiums +7.6%, broker pay +12.9%).
Source: DOL Form 5500 and Schedule A, plan years 2024 and 2023, employer health plans with 100 or more participants; built October 24, 2026. Medians need at least 10 rated plans to be shown for a city. Methodology.
How much do Oak Brook employers pay health insurance brokers?
55 Oak Brook employers reported $8,417,826 in broker commissions and fees on their 2024 Form 5500 filings, 48 of them disclosing at least some compensation. Too few fully insured medical plans in Oak Brook reported premium to compute a stable commission rate; the Illinois median is 1.5% and the U.S. median is 3.8%. In dollars, the median Oak Brook employer that disclosed broker pay reported $100,996.
Which Oak Brook employers have the largest health plans?
By insurance premium reported for 2024, Ace Hardware Corporation ($134M), Board of Trustees - Iron Workers Welfare Fund ($4.6M), Trustees of UNITE Here Health ($3.7M) lead. 25 Oak Brook employers are listed on this page; every employer in the record has its own page.
Which brokers and carriers are paid the most in Oak Brook?
By compensation reported by Oak Brook employers, the largest brokers are Marsh McLennan Agency ($1.7M, 2 plans), Eoi Service Company, Inc. ($1.3M, 1 plans), HUB International ($602,873, 8 plans). By medical premium, the largest carriers are Ace Insurance Company, Blue Cross Blue Shield, Bluecross Blueshield of Illinois.
Are Oak Brook employer health plans self-funded or fully insured?
Of 55 Oak Brook employer plans, 11 are fully insured, 16 are self-funded and 28 mix insured and self-funded coverage. Self-funded plans report only stop-loss and ancillary contracts on Schedule A, so their premium and broker pay understate total spend.
Other cities in Illinois
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