Security record · archived quarter
AON
Aon plc · Financial Services · Insurance - Brokers
19Tracked holders
0Δ holders
35.58MShares held
$14.19BReported value
+2New positions
−2Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow +3.7% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 164 | -3 | 152.51M | $50.56B | +5 | −7 |
| Q1 2026 | 169 | -3 | 143.04M | $46.23B | +6 | −10 |
| Q4 2025 | 171 | 0 | 150.30M | $53.02B | +1 | — |
| 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 | — | 24.02M | $7.05B | — | — |
Who holds it · Q1 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Capital World Investors ✦ | 12.10M | 0.0% | $4.83B | 0.8% | ▲ Add | 4 | SEC ↗ |
| 2 | State Street Global Advisors ✦ (passive) | 9.17M | +0.9% | $3.66B | 0.2% | ▲ Add | 2 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 5.41M | +9.4% | $2.15B | 0.2% | ▲ Add | 4 | SEC ↗ |
| 4 | Geode Capital Management ✦ (passive) | 5.41M | +9.4% | $2.15B | 0.2% | ▲ Add | 4 | SEC ↗ |
| 5 | Berkshire Hathaway ✦ | 4.10M | 0.0% | $1.64B | 0.6% | Held | 4 | SEC ↗ |
| 6 | Berkshire Hathaway ✦ | 4.10M | 0.0% | $1.64B | 0.6% | Held | 4 | SEC ↗ |
| 7 | Berkshire Hathaway ✦ | 4.10M | 0.0% | $1.64B | 0.6% | Held | 4 | SEC ↗ |
| 8 | Norges Bank ✦ (passive) | 1.67M | +0.3% | $664.86M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 9 | Wellington Management ✦ | 1.23M | New | $490.63M | 0.1% | New | 1 | SEC ↗ |
| 10 | Wellington Management ✦ | 1.23M | New | $490.63M | 0.1% | New | 1 | SEC ↗ |
| 11 | Wellington Management ✦ | 1.23M | New | $490.63M | 0.1% | New | 1 | SEC ↗ |
| 12 | Wellington Management ✦ | 1.23M | New | $490.63M | 0.1% | New | 1 | SEC ↗ |
| 13 | Wellington Management ✦ | 1.23M | New | $490.63M | 0.1% | New | 1 | SEC ↗ |
| 14 | Wellington Management ✦ | 1.23M | New | $490.63M | 0.1% | New | 1 | SEC ↗ |
| 15 | Wellington Management ✦ | 1.23M | New | $490.63M | 0.1% | New | 1 | SEC ↗ |
| 16 | Wellington Management ✦ | 1.23M | New | $490.63M | 0.1% | New | 1 | SEC ↗ |
| 17 | Wellington Management ✦ | 1.23M | New | $490.63M | 0.1% | New | 1 | SEC ↗ |
| 18 | T. Rowe Price ✦ | 661.60K | -6.5% | $264.04M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 19 | T. Rowe Price ✦ | 661.60K | -6.5% | $264.04M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 20 | Millennium Management ✦ | 425.68K | +540.8% | $169.88M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 21 | Citadel Advisors ✦ | 282.70K | +947.0% | $112.82M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 22 | Citadel Advisors ✦ | 282.70K | +947.0% | $112.82M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 23 | Adage Capital Partners ✦ | 170.97K | +85.7% | $68.23M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 24 | Markel Group ✦ | 129.45K | +2.6% | $51.66M | 0.5% | ▲ Add | 4 | SEC ↗ |
| 25 | Markel Group ✦ | 129.45K | +2.6% | $51.66M | 0.5% | ▲ Add | 4 | SEC ↗ |
| 26 | D. E. Shaw & Co. ✦ | 81.93K | -58.8% | $32.70M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 27 | D. E. Shaw & Co. ✦ | 81.93K | -58.8% | $32.70M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 28 | Renaissance Technologies ✦ | 35.10K | -74.5% | $14.01M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 29 | AQR Capital Management ✦ | 34.08K | -5.3% | $13.52M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 30 | AQR Capital Management ✦ | 34.08K | -5.3% | $13.52M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 31 | AQR Capital Management ✦ | 34.08K | -5.3% | $13.52M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 32 | AQR Capital Management ✦ | 34.08K | -5.3% | $13.52M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 33 | AQR Capital Management ✦ | 34.08K | -5.3% | $13.52M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 34 | Marshall Wace ✦ | 30.43K | -86.6% | $12.14M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 35 | Marshall Wace ✦ | 30.43K | -86.6% | $12.14M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 36 | Gotham Asset Management ✦ | 18.24K | +2.6% | $7.28M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 37 | Arrowstreet Capital ✦ | 16.83K | New | $6.72M | 0.0% | New | 1 | SEC ↗ |
| 38 | Two Sigma Investments ✦ | 5.23K | -90.2% | $2.09M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 39 | Bridgewater Associates ✦ | 2.98K | -67.2% | $1.19M | 0.0% | ▼ Trim | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Wellington Management | $490.63M | 0.1% |
| Wellington Management | $490.63M | 0.1% |
| Wellington Management | $490.63M | 0.1% |
| Wellington Management | $490.63M | 0.1% |
| Wellington Management | $490.63M | 0.1% |
| Wellington Management | $490.63M | 0.1% |
| Wellington Management | $490.63M | 0.1% |
| Wellington Management | $490.63M | 0.1% |
| Wellington Management | $490.63M | 0.1% |
| Arrowstreet Capital | $6.72M | 0.0% |
Exited
| Viking Global Investors | $258.73M | was 0.8% |
| Fisher Asset Management | $214,720 | 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.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2025 ·
Methodology ·
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