Defined Benefit (Pension) · DOL Form 5500 · 2022
Aon Corporation Pension Plan
Data updated 2026-08-11
- $1.5B
- Total assets
- 1,928
- Participants
- 99th
- Percentile by assets
- $783,466
- Avg per participant
Official DOL plan name: Aon Retirement Pension Plan · Sponsored by Aon Corporation · Illinois · Finance & Insurance
$1.5B in assets, 1,928 participants
Aon Corporation's Aon Retirement Pension Plan reported $1.5B in total assets and 1,928 participants in its 2022 DOL Form 5500 filing, ranking in the 99th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.
- 99th percentile by assets (of 139,126 plans)
- #9,119 in Finance & Insurance (9,261 peers)
Coverage in Illinois
Aon Retirement Pension Plan covers 1,928 participants in Illinois, 2.5x the typical Illinois plan (state average ~779 per filing). Assets: $1.5B.
- $1.5B
- total plan assets (2022 EOY)
- 1,928
- covered participants
- 99th
- percentile by assets (of 139,126 plans)
- $783,466
- avg assets per participant
The plan reported a net loss of $884M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.
Participants vs Illinois filers
In Illinois, the average filing covers about 779 participants across 5,745 plans. Aon Retirement Pension Plan reports 1,928 participants - 2.5x that state average ($1.5B EOY assets).
Illinois filing particulars
| Total Assets (Beginning of Year) | $2.3B |
|---|---|
| Net Assets (End of Year) | $1.5B |
| Net Income | -$884M |
| Employer EIN | 363051915 |
| Plan Effective Date | 2020-01-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Aon Corporation)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 3 | 14,536 | $6.9B |
| 2023 | 2 | 15,754 | $7.8B |
| 2024 | 2 | 15,620 | $8.2B |
Nearby Defined Benefit (Pension) Plans in Illinois
Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.
Aon Retirement Pension Plan vs. nearby Defined Benefit (Pension) plans in Illinois, assets vs. participants
- Central States, Southeast & Southwest Areas Pension Plan $42.6B · 50,096
- State Farm Insurance Companies Retirement Plan for United States Employees $32.1B · 49,052
- United Food & Commercial Workers Intl Union - Industry Pension Fund $8.0B · 20,170
- John Deere Pension Plan for Salaried Employees $7.3B · N/A
- Abbott Laboratories Annuity Retirement Plan $6.8B · 16,809
Similar-Sized Defined Benefit (Pension) Plans Nationally
Defined Benefit (Pension) plans in other states closest to Aon Retirement Pension Plan by total assets, not by location.
- Harvard University Retirement Plan (MA) $1.5B · 2,837
- Consolidated Pension Plan of Hackensack Meridian Health (NJ) $1.5B · 7,867
- Teamsters Local 639 - Employers Pension Trust Fund (DC) $1.5B · 4,100
- The Tjx Companies, Inc Retirement Plan (MA) $1.5B · 11,147
Frequently Asked Questions
How did Aon Retirement Pension Plan assets move in 2022? ▼
How have Aon Corporation plan assets changed over time? ▼
Where does Aon Retirement Pension Plan rank by assets among Form 5500 filers? ▼
Which Defined Benefit (Pension) plans are similar in size to Aon Retirement Pension Plan? ▼
Next read for Aon Retirement Pension Plan
Filing takeaways
Ways to act on Aon Retirement Pension Plan's numbers.
- By total assets, Aon Retirement Pension Plan ranks among the largest 1% of all filed plans. See the largest plans
- Compare it side-by-side against 3 similar Defined Benefit (Pension) plans in Illinois. Compare plans
- Aon Corporation's sponsor-wide assets have grown 17.9% since 2022 across 3 plan years on file. More Finance & Insurance plans