MKTX
MarketAxess Holdings Inc. · Financial Services · Financial - Capital Markets
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| 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 | — | −2 |
| Q2 2025 | 19 | 0 | 16.65M | $3.72B | +1 | −1 |
| Q1 2025 | 16 | 0 | 7.12M | $1.54B | — | — |
| Q4 2024 | 16 | -2 | 6.45M | $1.46B | +1 | −3 |
| Q3 2024 | 17 | +2 | 4.95M | $1.27B | +3 | −1 |
| Q2 2024 | 15 | — | 5.07M | $1.02B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | PRIMECAP Management ✦ | 1.33M | — | $266.88M | 0.2% | n/c | 1 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 936.93K | — | $187.41M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 936.93K | — | $187.41M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | Marshall Wace ✦ | 820.06K | — | $164.45M | 0.2% | n/c | 1 | SEC ↗ |
| 5 | Marshall Wace ✦ | 820.06K | — | $164.45M | 0.2% | n/c | 1 | SEC ↗ |
| 6 | Marshall Wace ✦ | 820.06K | — | $164.45M | 0.2% | n/c | 1 | SEC ↗ |
| 7 | Norges Bank ✦ (passive) | 500.12K | — | $100.29M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | Baillie Gifford ✦ | 344.00K | — | $68.98M | 0.1% | n/c | 1 | SEC ↗ |
| 9 | Baillie Gifford ✦ | 344.00K | — | $68.98M | 0.1% | n/c | 1 | SEC ↗ |
| 10 | Baillie Gifford ✦ | 344.00K | — | $68.98M | 0.1% | n/c | 1 | SEC ↗ |
| 11 | Baillie Gifford ✦ | 344.00K | — | $68.98M | 0.1% | n/c | 1 | SEC ↗ |
| 12 | Millennium Management ✦ | 339.26K | — | $68.03M | 0.1% | n/c | 1 | SEC ↗ |
| 13 | Two Sigma Investments ✦ | 203.35K | — | $40.78M | 0.1% | n/c | 1 | SEC ↗ |
| 14 | Citadel Advisors ✦ | 190.85K | — | $38.27M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | Citadel Advisors ✦ | 190.85K | — | $38.27M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | Renaissance Technologies ✦ | 164.64K | — | $33.01M | 0.1% | n/c | 1 | SEC ↗ |
| 17 | T. Rowe Price ✦ | 99.40K | — | $19.93M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | T. Rowe Price ✦ | 99.40K | — | $19.93M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | Bridgewater Associates ✦ | 63.17K | — | $12.67M | 0.1% | n/c | 1 | SEC ↗ |
| 20 | Adage Capital Partners ✦ | 36.35K | — | $7.29M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | AQR Capital Management ✦ | 19.26K | — | $3.86M | 0.0% | n/c | 1 | SEC ↗ |
| 22 | AQR Capital Management ✦ | 19.26K | — | $3.86M | 0.0% | n/c | 1 | SEC ↗ |
| 23 | AQR Capital Management ✦ | 19.26K | — | $3.86M | 0.0% | n/c | 1 | SEC ↗ |
| 24 | D. E. Shaw & Co. ✦ | 18.48K | — | $3.71M | 0.0% | n/c | 1 | SEC ↗ |
| 25 | D. E. Shaw & Co. ✦ | 18.48K | — | $3.71M | 0.0% | n/c | 1 | SEC ↗ |
| 26 | Gotham Asset Management ✦ | 1.16K | — | $232,013 | 0.0% | n/c | 1 | 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 · $16,260
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology