Who owns AON? 13F holders and whale ownership
AON is tracked across public portfolios in Whale Analyzer. This page answers who owns AON, which top funds are buying AON, aggregate disclosed value, and recent position changes based on public data. Dodge & Cox is the largest reported holder at $2.62B; the top five funds control 100.0% of reported ownership; institutions were net buying last quarter (4 increased, 1 reduced); the stock trades above the aggregate whale cost basis of $317.65. Top tracked holders include Dodge & Cox, Polen Capital, Andreas Halvorsen, and Seth Klarman.
Continue to the live AON dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Dodge & Cox 13F portfolio Dodge & Cox holdings | $2.62B | 8.1M | Increased |
| Polen Capital 13F portfolio Polen Capital Management holdings | $437.1M | 1.4M | Reduced |
| Andreas Halvorsen 13F portfolio Viking Global Investors holdings | $350.9M | 1.1M | Increased |
| Seth Klarman 13F portfolio Baupost Group holdings | $248.2M | 769.0K | New |
| Tom Gayner 13F portfolio Markel Group holdings | $43.8M | 135.8K | Increased |
Ownership concentration
Reported ownership of AON is highly concentrated across tracked institutions.
- Single largest holder: 70.8% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 5 tracked institutions, 4 increased, 1 reduced. Net positioning is net buying.
- Dodge & Cox — Dodge & Cox ($2.62B) (▲ 3.4% qoq shares) · avg cost $342.75
- Polen Capital — Polen Capital Management ($437.1M) (▼ 26.7% qoq shares) · avg cost $334.20
- Andreas Halvorsen — Viking Global Investors ($350.9M) (▲ 38.7% qoq shares) · avg cost $116.74
- Seth Klarman — Baupost Group ($248.2M) · avg cost $317.22
- Tom Gayner — Markel Group ($43.8M) (▲ 1.3% qoq shares) · avg cost $262.89
Whale cost basis vs current price
The aggregate tracked cost basis is $317.65 versus a current price of $328.69, so AON trades above its cost basis (+3.5%). Average unrealized P&L across tracked holders: 38%.
Sector positioning — Financials
AON sits within the Financials sector alongside 84 other tracked names. Compare whale ownership across peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time ownership totals. Open the live AON dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
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Learn more in Whale Analyzer Academy
Deepen your read on AON with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns AON stock?
Whale Analyzer tracks 5 public institutional holders of AON with a combined reported value of $3.70B. See the holder table above for the largest tracked positions.
Which top funds are buying AON?
Tracked institutions were net buying last quarter — 4 increased, 1 reduced. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is AON ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is AON above or below the whale cost basis?
The aggregate tracked cost basis is $317.65 versus a current price of $328.69 (+3.5%).
What does 13F ownership mean for AON?
Use the interactive AON dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.