AJG
Arthur J. Gallagher & Co. · Financial Services · Insurance - Brokers
Momentum inputs (comparable managers):
holder breadth +25.0% ·
share flow +29.6% ·
net new positions +20.0%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 3 | 0 | 364.03K | $83.50M | n/a | −2 |
| Q2 2026 | 164 | +1 | 178.53M | $40.94B | +6 | −6 |
| Q1 2026 | 167 | -1 | 178.94M | $38.71B | +4 | −6 |
| Q4 2025 | 167 | +3 | 199.17M | $51.54B | +5 | −1 |
| Q3 2025 | 23 | +1 | 147.58M | $45.71B | +3 | −3 |
| Q2 2025 | 20 | 0 | 102.85M | $32.91B | +1 | −1 |
| Q1 2025 | 17 | -3 | 40.12M | $13.85B | +1 | −4 |
| Q4 2024 | 20 | +4 | 40.97M | $11.63B | +4 | n/a |
| Q3 2024 | 15 | +3 | 21.34M | $6.00B | +3 | n/a |
| Q2 2024 | 12 | n/a | 21.73M | $5.63B | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 10.28M | n/a | $2.92B | 0.1% | n/c | 1 | SEC ↗ |
| 2 | Capital World Investors ✦ | 8.20M | +30.4% | $2.33B | 0.4% | ▲ Add | 3 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 6.28M | +14.3% | $1.78B | 0.1% | ▲ Add | 3 | SEC ↗ ×2 |
| 4 | Norges Bank ✦ (passive) | 5.01M | -3.3% | $1.42B | 0.2% | ▼ Trim | 3 | SEC ↗ |
| 5 | Wellington Management ✦ | 2.82M | +162.1% | $801.12M | 0.1% | ▲ Add | 3 | SEC ↗ ×7 |
| 6 | Citadel Advisors ✦ | 2.41M | +7975.3% | $682.74M | 0.6% | ▲ Add | 2 | SEC ↗ ×2 |
| 7 | D. E. Shaw & Co. ✦ | 1.76M | +1511.2% | $499.06M | 0.6% | ▲ Add | 3 | SEC ↗ |
| 8 | Baillie Gifford ✦ | 1.63M | -31.6% | $462.38M | 0.4% | ▼ Trim | 3 | SEC ↗ ×4 |
| 9 | Millennium Management ✦ | 793.64K | +1762.0% | $225.28M | 0.2% | ▲ Add | 3 | SEC ↗ |
| 10 | T. Rowe Price ✦ | 412.30K | +8.5% | $117.03M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 11 | Adage Capital Partners ✦ | 408.40K | +323.2% | $115.93M | 0.2% | ▲ Add | 3 | SEC ↗ |
| 12 | Marshall Wace ✦ | 305.92K | +1833.5% | $86.84M | 0.1% | ▲ Add | 3 | SEC ↗ ×5 |
| 13 | Soros Fund Management ✦ | 300.00K | New | $85.16M | 2.1% | New | 1 | SEC ↗ |
| 14 | Renaissance Technologies ✦ | 173.20K | +91.0% | $49.16M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 15 | AQR Capital Management ✦ | 125.38K | +6.3% | $35.59M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 16 | Gotham Asset Management ✦ | 30.37K | -13.8% | $8.62M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 17 | Arrowstreet Capital ✦ | 21.75K | New | $6.17M | 0.0% | New | 1 | SEC ↗ |
| 18 | GAMCO Investors ✦ | 12.83K | +1002.9% | $3.64M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | Two Sigma Investments ✦ | 1.35K | New | $382,062 | 0.0% | New | 1 | SEC ↗ |
| 20 | Fisher Asset Management ✦ | 755 | New | $214,566 | 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
| Soros Fund Management | $85.16M | 2.1% |
| Arrowstreet Capital | $6.17M | 0.0% |
| Two Sigma Investments | $382,062 | 0.0% |
| Fisher Asset Management | $214,566 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,234 holders, 209.94M shares, $44.40B 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)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 1.00K sh · $252,858
Officer · 12.00K sh · $3.17M
Officer · 12.00K sh · $3.24M
Officer · 3.50K sh · $899,588
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology