401(k) · DOL Form 5500 · 2024
Aon Corporation 401(k) Plan
Data updated 2026-08-25
- $6.7B
- Total assets Very large vs avg
- 13,974
- Participants Very large workforce
- 100th
- Percentile by assets National rank
- $479,868
- Avg per participant High balance/head
Official DOL plan name: Aon Savings Plan · Sponsored by Aon Corporation · Georgia · Finance & Insurance
$6.7B in assets, 13,974 participants
Aon Corporation's Aon Savings Plan reported $6.7B in total assets and 13,974 participants in its 2024 DOL Form 5500 filing, ranking in the 100th 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.
- #8,512 in Finance & Insurance (8,549 peers)
Coverage in Georgia
Aon Savings Plan covers 13,974 participants in Georgia, 13x the typical Georgia plan (state average ~1,096 per filing). Assets: $6.7B.
- #8,512
- in Finance & Insurance (8,549 peers)
- +8.1%
- assets growth YoY
- 67×
- vs typical plan assets (national mean)
Aon Savings Plan's outsized position by total assets
Aon Savings Plan vs every filed plan by assets
End-of-year total assets · plan year 2024 · DOL Form 5500
$6,705,680,865 Highest reported value at or above every one of 123,620 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024
Aon Savings Plan's mega-plan peer group by participant headcount
Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Aon Savings Plan is a mega filing (13,974 participants), the rightmost band on the breakdown.
What changed between DOL Form 5500 filings
plan year 2023 → plan year 2024
- Aon Savings Plan reported net income fell from $808M in the plan year 2023 filing to $462M in the plan year 2024 filing.
- Aon Savings Plan end-of-year assets rose from $6.2B in the plan year 2023 filing to $6.7B in the plan year 2024 filing.
- Aon Savings Plan reported participants rose from 13,948 in the plan year 2023 filing to 13,974 in the plan year 2024 filing.
EBSA filing schedule strip
Filing strip 363051915 · Aon Corporation PY 2024 · 401(k)
Aon Savings Plan · $6.7B · 13,974 · 100th
- VS-ST $6.7B
- VS-ST 13,974
- VS-ST 100th
- VS-ST 401(k)
- VS-ST near Conocophillips Savings Plan
- VS-ST ind #8512
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 Georgia →
Aon Savings Plan in the asset neighbourhood
Georgia filing particulars
| Total Assets (Beginning of Year) | $6.2B |
|---|---|
| Net Assets (End of Year) | $6.6B |
| Net Income | $462M |
| Employer EIN | 363051915 |
| Plan Effective Date | 1984-07-01 |
| 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 401(k) Plans in Georgia
Peer 401(k) plans, same state, same plan type, ranked by total assets.
- The Teamster - UPS National 401(k) Tax Deferred Savings Plan $19.3B · 452,126
- Delta 401(k) Retirement Plan $19.0B · 89,836
- Delta 401(k) Retirement Plan for Pilots $15.9B · 14,473
- UPS 401(k) Savings Plan $14.2B · 95,250
- The Home Depot Futurebuilder $14.1B · 398,464
Scale composition for Aon Savings Plan
Aon Savings Plan reports $6.7B in end-of-year assets across 13,974 participants (0.054% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.015% of 93,925,755 covered participants) - about $479,868 per participant (3.5x the national average assets-per-participant) . Net income for plan year 2024 was $462M.
This plan identity (EIN 363051915, plan #020) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $5.4B to $6.7B (+23.7%) while covered participants moved from 12,608 to 13,974 . Single-year sparse filers cannot show that trail.
| Plan year | Participants | EOY assets | Filing |
|---|---|---|---|
| 2022 | 12,608 | $5.4B | Open filing |
| 2023 | 13,948 | $6.2B | Open filing |
| 2024 · index core | 13,974 | $6.7B | This page |
The same sponsor also keeps 1 other index-core plan on PlainRetire:
- Aon Retirement Pension Plan (Defined Benefit (Pension), $1.5B, 1,646 participants)
Aon Savings Plan's out-of-state 401(k) peers by assets and headcount
Outside Georgia, the nearest 401(k) by assets is Conocophillips Savings Plan in TX ($6.7B); by covered participants it is The Communicare Employee's 401(k) Plan in OH (13,973 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($6.7B here).
- Conocophillips Savings Plan (TX) $6.7B · 6,596
- Boston Scientific Corporation 401(k) Retirement Savings Plan (MA) $6.8B · 20,639
- Aecom Retirement & Savings Plan (TX) $6.8B · 17,785
- Intermountain Health 401(k) Plan (UT) $6.8B · 68,360
Similar participant headcount
Nearest other-state filings by covered participants (13,974 participants); asset peers above are excluded.
- The Communicare Employee's 401(k) Plan (OH) 13,973 · 1 off
- Ciena Healthcare Management, Inc. 401(k) Plan (MI) 13,967 · 7 off
- Epic Systems Corporation 401(k) Plan (WI) 13,955 · 19 off
- K-Va-T 401(k) Plan (VA) 13,995 · 21 off
DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.