Plan Ledger DOL Form 5500 · updated monthly

Aon Corporation401(k)

AON SAVINGS PLAN · ATLANTA, GA · plan year 2024

Reported admin expense ratio · 2024
0.03%

Peer grade: B+ · admin costs + employer contributions vs same-size plans · how grading works

Aon Corporation reported $1,865,744 in plan administrative expenses for 2024: 0.03% of average plan assets, below the peer median. Employer contributions averaged $8,152 per active participant. This ratio covers administrative expenses reported on the plan's Schedule H only; fund-level expense ratios are not included in public structured data — see methodology.

Across the 2 years on file its reported administrative ratio fell from 0.08% to 0.03%. The plan sits in the over $1B size bracket, benchmarked here against 1,229 comparable plans and shown alongside other finance & insurance employers. By assets it is the 6th-largest of 2,160 plans among Georgia employers on file, and the 30th of 4,798 in finance & insurance. In 2024, employees put in $1.55 for every $1.00 the employer contributed.

Plan summary
Net assets, end of year$6,588,286,298
Participants with balances24,239
Active participants13,470
Employer contributions$109,813,839
Employee contributions$170,069,538
Employer contribution per active participant$8,152
Average account balance$271,805
Benefits paid to participants$700,052,508
Plan auditUnmodified (clean) audit opinion
Plan history3
Yearassets · accounts · employer contribution
2024$6.6B · 24,239 accts · $109.8M emplr
2023$6.1B · 24,537 accts · $107.9M emplr
2022$5.3B · 24,776 accts · $99.7M emplr
Administrative expenses, itemized · 2024
Recordkeeping & contract admin$799,785
Investment management$724,729
Trustee / custodial$339,282
Total administrative$1,865,744
The Aon Corporation 401(k) match · 2024
Employer contribution per active participant$8,152
Median for plans this size$5,259
2024$8,152 per active participant
2023$7,721 per active participant
2022$7,117 per active participant

Aon Corporation's 2024 employer contribution ran above the $5,259 median for plans its size. Filings report dollars actually contributed, not the match formula; the formula itself (for example, 50% of the first 6% of pay) lives in the plan's summary plan description from HR.

What these fees cost you

Annual cost at the plan's reported 2024 administrative ratio, against the median plan its size; fund expense ratios are extra. Compare any plan.

Service providers · 20247
ALIGHT SOLUTIONS · Recordkeeping · Participant communication$551,571
THE VANGUARD GROUP · Recordkeeping · Consulting$308,831
THE NORTHERN TRUST CO · Trustee$658,497
CURCIO WEBB · Consulting$176,723
ERNST & YOUNG US LLP$42,450
ALIGHT FINANCIAL SOLUTIONS, LLC · Securities brokerage$25,161
PERSHING LLCindirect comp

Compensation shown is direct payments from plan assets reported on Schedule C. Providers paid through fund revenue-sharing appear as indirect.

Recordkeeper by year2
2024Alight, Vanguard
2023Alight

This plan has changed recordkeepers within these filings. If you left Aon Corporation before a switch, your account may sit at the earlier firm or in a rollover IRA. Looking for an account from a past job here? How to find an old 401(k).

Administrative cost history3
2024$1,865,744 · 0.03%
2023$2,411,000 · 0.04%
2022$4,687,000 · 0.08%
Same employer
Similar plansFinance & Insurance · Georgia
Humana Inc. KY$7.7B · 0.03%

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Source: U.S. Department of Labor, Form 5500 series, EIN 363051915 · Verify on EFAST2 · Amounts are as reported by the plan sponsor for the plan year shown.