Defined Benefit (Pension) · DOL Form 5500 · 2022
Aon Corporation Pension Plan
Data updated 2026-08-25
- $1.5B
- Total assets Very large vs avg
- 1,928
- Participants Near avg headcount
- 99th
- Percentile by assets National rank
- $783,466
- Avg per participant High balance/head
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.
- #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.
- #9,119
- in Finance & Insurance (9,261 peers)
- -34.2%
- assets change YoY
- 15×
- vs typical plan assets (national mean)
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.
Aon Retirement Pension Plan's outsized position by total assets
Aon Retirement Pension Plan vs every filed plan by assets
End-of-year total assets · plan year 2022 · DOL Form 5500
$1,510,521,740 Top 1% higher than 99% of 139,123 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2022
Aon Retirement Pension Plan's large-plan peer group by participant headcount
Plan-year 2022 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Aon Retirement Pension Plan lands in the large band (1,928 participants).
Published 5500 schedule card
Filing strip 363051915 · Aon Corporation PY 2022 · Defined Benefit (Pension)
Aon Retirement Pension Plan · $1.5B · 1,928 · 99th
- RANK $1.5B
- RANK 1,928
- RANK 99th
- RANK Defined Benefit (Pension)
- RANK near Harvard University Retirement Plan
- RANK ind #9119
Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Finance & Insurance retirement plans → · Plans in Illinois →
Aon Retirement Pension Plan in the asset neighbourhood
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)
Sponsor-wide plan assets over time
All Aon Corporation plans reported in each filing year
- Latest sponsor-wide plan assets
- $8.2B 17.932500979716092% vs 2022
- 2024 filing year
| 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.
- 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
Aon Retirement Pension Plan's out-of-state Defined Benefit (Pension) peers by assets and headcount
Outside Illinois, the nearest Defined Benefit (Pension) by assets is Harvard University Retirement Plan in MA ($1.5B); by covered participants it is Cash Balance Retirement Plan of Hallmark Cards, Inc. in MO (1,928 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($1.5B here).
- 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
Similar participant headcount
Nearest other-state filings by covered participants (1,928 participants); asset peers above are excluded.
- Cash Balance Retirement Plan of Hallmark Cards, Inc. (MO) 1,928 · 0 off
- Gannett Retirement Plan (VA) 1,922 · 6 off
- New Century Energies Inc Retirement Plan for Public Service Company of Colorado Bargaining Unit Ees and Former Non-Bargaining Unit Ees (MN) 1,935 · 7 off
- Mission Support and Test Services LLC (Msts) Employee Retirement Plan (NV) 1,935 · 7 off
DOL Form 5500 plan year 2022. Asset totals can differ widely at the same headcount; neither axis is a quality rating.