Whale Analyzer
AON Institutional Holders and 13F Ownership
Compare 11 tracked holders of AON, their reported positions and disclosed changes. Coverage is limited to the investors tracked by Whale Analyzer; these records do not establish all shareholders or current trades. Available original SEC filings for tracked 13F holders are linked below. Top tracked holders include Dodge & Cox, Viking Global Investors, Baupost Group, and First Pacific Advisors.
Continue to the live AON dashboardTop holders
| Investor | Reported value | Shares | Change | Report date |
|---|---|---|---|---|
| Dodge & Cox 13F holdings | $2.85B | 8.6M | Increased | 2026-06-30 |
| Viking Global Investors 13F holdings | $381.9M | 1.2M | Increased | 2026-06-30 |
| Baupost Group 13F holdings | $227.9M | 687.0K | Reduced | 2026-06-30 |
| First Pacific Advisors 13F holdings | $226.0M | 681.4K | Reduced | 2026-06-30 |
| National Pension Service 13F holdings | $160.8M | 484.9K | Increased | 2026-06-30 |
| Weitz Investment Management 13F holdings | $70.9M | 213.9K | Held | 2026-06-30 |
| Polen Capital Management 13F holdings | $54.4M | 164.0K | Reduced | 2026-06-30 |
| Markel Group 13F holdings | $37.6M | 135.8K | Held | 2026-09-30 |
| Jensen Investment Management 13F holdings | $8.6M | 25.8K | Increased | 2026-06-30 |
| Bridgewater Associates 13F holdings | $5.2M | 15.7K | Reduced | 2026-06-30 |
| Yacktman Asset Management 13F holdings | $3.6M | 13.2K | Increased | 2026-09-30 |
Original SEC filing sources
These recorded filings support the tracked 13F rows included in the aggregate reported values on this page. See each holder profile for source coverage and context for other disclosure types.
- Dodge & Cox SEC filing (0001193125-26-349535) · report date 2026-06-30
- Viking Global Investors SEC filing (0001103804-26-000006) · report date 2026-06-30
- Baupost Group SEC filing (0001061768-26-000010) · report date 2026-06-30
- First Pacific Advisors SEC filing (0001377581-26-000007) · report date 2026-06-30
- National Pension Service SEC filing (0001193125-26-347818) · report date 2026-06-30
- Weitz Investment Management SEC filing (0001821268-26-000133) · report date 2026-06-30
- Polen Capital Management SEC filing (0001172661-26-003035) · report date 2026-06-30
- Markel Group SEC filing (0001096343-26-000085) · report date 2026-09-30
- Jensen Investment Management SEC filing (0001171200-26-000010) · report date 2026-06-30
- Bridgewater Associates SEC filing (0001350694-26-000003) · report date 2026-06-30
- Yacktman Asset Management SEC filing (0000905567-26-000005) · report date 2026-09-30
Tracked-sample concentration
Reported position value for AON is highly concentrated within this tracked-holder sample. These percentages are not market-wide ownership shares.
- Largest tracked holder: 70.8% of aggregate reported value in this sample
- Top 5 tracked holders: 95.5% of aggregate reported value in this sample
- Top 10 tracked holders: 99.9% of aggregate reported value in this sample
Whale activity this quarter
Across 11 tracked holders, 5 increased, 4 reduced, 2 held. Net positioning is net buying.
- Dodge & Cox ($2.85B) (▲ 5.9% qoq shares) · modeled avg cost estimate $340.84
- Viking Global Investors ($381.9M) (▲ 5.9% qoq shares) · modeled avg cost estimate $127.42
- Baupost Group ($227.9M) (▼ 10.7% qoq shares) · modeled avg cost estimate $314.94
- First Pacific Advisors ($226.0M) (▼ 3.1% qoq shares)
- National Pension Service ($160.8M) (▲ 2.0% qoq shares) · modeled avg cost estimate $293.86
- Weitz Investment Management ($70.9M) (→ 0.0% qoq shares)
- Polen Capital Management ($54.4M) (▼ 87.9% qoq shares) · modeled avg cost estimate $318.74
- Markel Group ($37.6M) (→ 0.0% qoq shares) · modeled avg cost estimate $262.89
Modeled cost estimate vs current price
The share-weighted modeled cost estimate across 7 covered tracked holders is $314.05 versus a current price of $334.81, so AON trades above that estimate (+6.6%). This model does not establish any filer's actual purchase price, unrealized gain, or investment return.
Sector positioning — Financials
AON sits within the Financials sector alongside 139 other tracked names. Compare reported positions across tracked peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time or market-wide 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 11 public-disclosure holders of AON with a combined reported value of $4.03B. See the holder table above for the largest tracked positions.
Which top funds are buying AON?
Tracked holders were net buying last quarter — 5 increased, 4 reduced, 2 held. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is the tracked AON sample?
The top five tracked holders account for 95.5% of aggregate reported value in this tracked sample. This is not a market-wide ownership percentage.
How does AON compare with the modeled cost estimate?
The share-weighted modeled cost estimate across 7 covered tracked holders is $314.05 versus a current price of $334.81 (+6.6%). It is not an actual purchase price, unrealized gain, or investment return.
What does 13F ownership mean for AON?
These are historical reported positions from tracked filers, not real-time ownership or a complete shareholder register. Use the interactive AON dashboard to explore them, or read our 13F Alpha Signals Guide.