AON
Aon plc · Financial Services · Insurance - Brokers
Momentum inputs (comparable managers):
holder breadth +4.5% ·
share flow +1.4% ·
net new positions +4.3%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 4 | 0 | 248.25K | $67.60M | n/a | −1 |
| Q2 2026 | 162 | -3 | 151.48M | $50.22B | +5 | −9 |
| Q1 2026 | 169 | -3 | 143.04M | $46.23B | +6 | −10 |
| Q4 2025 | 171 | 0 | 150.30M | $53.02B | +1 | n/a |
| Q3 2025 | 29 | +4 | 89.97M | $32.08B | +4 | −1 |
| Q2 2025 | 23 | +1 | 74.26M | $26.49B | +3 | −2 |
| Q1 2025 | 19 | 0 | 35.58M | $14.19B | +2 | −2 |
| Q4 2024 | 19 | +1 | 34.32M | $12.32B | +2 | −1 |
| Q3 2024 | 17 | 0 | 24.43M | $8.45B | +1 | −1 |
| Q2 2024 | 17 | n/a | 24.02M | $7.05B | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 20.29M | n/a | $7.24B | 0.1% | n/c | 1 | SEC ↗ ×6 |
| 2 | BlackRock ✦ (passive) | 15.93M | n/a | $5.68B | 0.1% | n/c | 1 | SEC ↗ ×22 |
| 3 | Capital World Investors ✦ | 12.14M | +0.4% | $4.33B | 0.6% | ▲ Add | 5 | SEC ↗ |
| 4 | State Street Global Advisors ✦ (passive) | 9.12M | -0.5% | $3.26B | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 5 | Geode Capital Management ✦ (passive) | 5.59M | +3.2% | $1.99B | 0.1% | ▲ Add | 5 | SEC ↗ ×2 |
| 6 | Berkshire Hathaway ✦ | 4.10M | 0.0% | $1.46B | 0.6% | Held | 5 | SEC ↗ ×3 |
| 7 | Norges Bank ✦ (passive) | 2.12M | +27.0% | $754.67M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 8 | Fidelity (FMR) ✦ | 1.46M | n/a | $520.06M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 9 | Wellington Management ✦ | 1.11M | -9.4% | $397.34M | 0.1% | ▼ Trim | 2 | SEC ↗ ×9 |
| 10 | Two Sigma Investments ✦ | 629.55K | +11928.2% | $224.60M | 0.4% | ▲ Add | 5 | SEC ↗ |
| 11 | T. Rowe Price ✦ | 621.58K | -6.0% | $221.75M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 12 | Adage Capital Partners ✦ | 302.27K | +76.8% | $107.84M | 0.2% | ▲ Add | 3 | SEC ↗ |
| 13 | Marshall Wace ✦ | 241.62K | +694.0% | $86.20M | 0.1% | ▲ Add | 5 | SEC ↗ ×2 |
| 14 | D. E. Shaw & Co. ✦ | 172.97K | +111.1% | $61.71M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 15 | Markel Group ✦ | 129.80K | +0.3% | $46.31M | 0.4% | ▲ Add | 5 | SEC ↗ ×2 |
| 16 | Citadel Advisors ✦ | 129.48K | -54.2% | $46.19M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 17 | Arrowstreet Capital ✦ | 78.75K | +368.0% | $28.10M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | AQR Capital Management ✦ | 42.12K | +23.6% | $14.91M | 0.0% | ▲ Add | 5 | SEC ↗ ×4 |
| 19 | Gotham Asset Management ✦ | 34.70K | +90.2% | $12.38M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 20 | Millennium Management ✦ | 7.12K | -98.3% | $2.54M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 21 | GAMCO Investors ✦ | 5.60K | New | $2.00M | 0.0% | New | 1 | SEC ↗ |
| 22 | Fisher Asset Management ✦ | 772 | New | $275,601 | 0.0% | New | 1 | SEC ↗ |
| 23 | Harris Associates (Oakmark) ✦ | 699 | New | $249,375 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| GAMCO Investors | $2.00M | 0.0% |
| Fisher Asset Management | $275,601 | 0.0% |
| Harris Associates (Oakmark) | $249,375 | 0.0% |
Exited
| Renaissance Technologies | $14.01M | was 0.0% |
| Bridgewater Associates | $1.19M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,241 holders, 181.94M shares, $57.21B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
Director · 1.74K sh @ 325.63 · $566,271
Director · 5.10K sh @ 326.53 · $1.66M
Director · 7.21K sh @ 327.52 · $2.36M
Director · 4.14K sh @ 328.34 · $1.36M
Director · 1.44K sh @ 329.69 · $474,754
Director · 367 sh @ 330.51 · $121,297
Open-market sales (S)
No open-market insider sales in our coverage window.
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology