MKTX
MarketAxess Holdings Inc. · Financial Services · Financial - Capital Markets
Momentum inputs (comparable managers): holder breadth 0.0% · share flow +10.3% · net new positions 0.0% · formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 3 | -1 | 34.24K | $5.33M | n/a | −1 |
| Q2 2026 | 124 | +1 | 26.76M | $3.03B | +9 | −7 |
| Q1 2026 | 125 | -6 | 27.43M | $4.53B | +6 | −13 |
| Q4 2025 | 131 | 0 | 28.24M | $5.12B | +2 | −1 |
| Q3 2025 | 20 | -1 | 17.11M | $2.98B | n/a | −2 |
| Q2 2025 | 19 | 0 | 16.65M | $3.72B | +1 | −1 |
| Q1 2025 | 16 | 0 | 7.12M | $1.54B | n/a | n/a |
| Q4 2024 | 16 | -2 | 6.45M | $1.46B | +1 | −3 |
| Q3 2024 | 17 | +2 | 4.95M | $1.27B | +3 | −1 |
| Q2 2024 | 15 | n/a | 5.07M | $1.02B | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 1.47M | -10.1% | $317.04M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 2 | PRIMECAP Management ✦ | 1.36M | -0.6% | $294.56M | 0.2% | ▼ Trim | 4 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 1.13M | +1.9% | $245.22M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 4 | Millennium Management ✦ | 618.92K | +329.4% | $133.90M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 5 | Norges Bank ✦ (passive) | 507.35K | -3.7% | $109.76M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 6 | Citadel Advisors ✦ | 474.35K | +371.6% | $102.62M | 0.1% | ▲ Add | 4 | SEC ↗ ×2 |
| 7 | Two Sigma Investments ✦ | 430.52K | +49.3% | $93.14M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 8 | Marshall Wace ✦ | 358.33K | -25.6% | $77.53M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 9 | Baillie Gifford ✦ | 221.24K | -27.0% | $47.87M | 0.0% | ▼ Trim | 4 | SEC ↗ ×4 |
| 10 | AQR Capital Management ✦ | 129.51K | +37.5% | $28.02M | 0.0% | ▲ Add | 4 | SEC ↗ ×5 |
| 11 | Renaissance Technologies ✦ | 129.50K | -43.2% | $28.02M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 12 | D. E. Shaw & Co. ✦ | 112.48K | +696.0% | $24.34M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 13 | Arrowstreet Capital ✦ | 88.92K | +6.3% | $19.24M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | T. Rowe Price ✦ | 59.40K | -5.8% | $12.85M | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
| 15 | Adage Capital Partners ✦ | 24.45K | +84.5% | $5.29M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 16 | Gotham Asset Management ✦ | 1.52K | +40.9% | $328,852 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 444 holders, 37.78M shares, $5.93B 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 · 100 sh · $16,465
Director · 6.16K sh · $1.01M
Officer · 100 sh · $16,332
Officer · 100 sh · $16,260
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology