Based on U.S. Department of Labor Form 5500 filings (plan years 2022–2024), 79 U.S. retirement plans report holding Aon Plc in their Schedule of Assets, totaling $806.4M in parsed positions. Matched on the normalized security name across each plan’s latest filing and ranked by position size.
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| # | Sponsor / Plan | Location | Participants | Plan assets (EOY) | Position |
|---|---|---|---|---|---|
| 1 | BERKSHIRE HATHAWAY CREDIT CORPORATION BERKSHIRE HATHAWAY CONSOLIDATED PENSION PLAN | OMAHA NE | 7,732 | $5.2B | $497.1M |
| 2 | PRECISION CASTPARTS CORP PRECISION CASTPARTS CORP MASTER TRUST DEFINED BENEFIT PLANS | LAKE OSWEGO OR | — | $1.3B | $129.3M |
| 3 | THE BOEING CO. AND CONSOLIDATED SUBSIDIARIES |
SEATTLE WA |
| — |
| $73.5B |
| $27.4M |
| 4 | UNITED HEALTHCARE SERVICES INC. UNITEDHEALTH GROUP 401(K) SAVINGS PLAN MASTER TRUST | MINNETONKA MN | — | $31.0B | $25.3M |
| 5 | MCMASTER-CARR SUPPLY COMPANY MCMASTER-CARR SUPPLY COMPANY PROFIT SHARING TRUST | ELMHURST IL | 4,333 | $3.0B | $19.0M |
| 6 | 3M COMPANY 3M EMPLOYEE RETIREMENT INCOME PLAN | ST. PAUL MN | 6,472 | $8.9B | $16.8M |
| 7 | THE DOW CHEMICAL COMPANY DOW RETIREMENT GROUP TRUST - GLOBAL EQUITY | MIDLAND MI | — | $591.0M | $13.2M |
| 8 | VERIZON COMMUNICATIONS INC. VERIZON MASTER SAVINGS TRUST | BASKING RIDGE NJ | — | $41.1B | $12.8M |
| 9 | RTX CORPORATION RTX MASTER RETIREMENT TRUST | FARMINGTON CT | — | $42.1B | $9.0M |
| 10 | NORTHWELL HEALTH, INC. NORTHWELL HEALTH PENSION PLAN | WESTBURY NY | 26,078 | $2.8B | $7.1M |
