Which hedge funds own MKTX? MARKETAXESS HLDGS INC, Q2 2026 13F holders
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12 of the hedge funds tracked by WhaleCreep disclosed a position in MKTX (MARKETAXESS HLDGS INC) in their Q2 2026 13F filings, worth $127.4m in total. The largest holder by portfolio weight is Brevan Howard Capital Management at 0.1% of its book. 3 managers opened a new position this quarter: Brevan Howard Capital Management, Tudor Investment, Marshall Wace. 2 exited: Baillie Gifford, Findlay Park Partners.
12tracked managers holding
3opened this quarter
2exited this quarter
Which hedge funds hold MKTX? Current holders by portfolio weight
| Manager | As of | Weight of book | Value | Shares | Δ shares | Action |
|---|---|---|---|---|---|---|
| Brevan Howard Capital Management | Q2 2026 | 0.1% | $5.8m | 51,050 | – | new |
| Tudor Investment | Q2 2026 | 0.1% | $15.6m | 137,847 | – | new |
| Citadel Advisors | Q2 2026 | 0.0% | $54.7m | 481,689 | 486% | added |
| Renaissance Technologies LLC | Q2 2026 | 0.0% | $22.7m | 200,000 | 20% | added |
| Holocene Advisors | Q2 2026 | 0.0% | $4.3m | 38,269 | -13% | reduced |
| Millennium Management | Q2 2026 | 0.0% | $12.4m | 109,590 | -90% | reduced |
| Marshall Wace | Q2 2026 | 0.0% | $4.4m | 39,090 | – | new |
| D. E. Shaw & Co | Q2 2026 | 0.0% | $5.4m | 47,977 | 1348% | added |
| Bridgewater Associates | Q2 2026 | 0.0% | $797.2k | 7,024 | 25% | added |
| Horizon Kinetics | Q2 2026 | 0.0% | $255.8k | 2,254 | 7% | added |
| Point72 Asset Management LP | Q2 2026 | 0.0% | $919.3k | 8,100 | -97% | reduced |
| Ancora Advisors | Q2 2026 | 0.0% | $7.2k | 63 | -99% | reduced |
Exited since the previous quarter
| Manager | Prior weight | Prior value |
|---|---|---|
| Baillie Gifford | 1.2% | $10.8m |
| Findlay Park Partners | 11.5% | $79.3m |
Held in a manager's last filing on record
These managers have not filed for the latest quarter; their last disclosure is dated.
| Manager | Last filing | Weight |
|---|---|---|
| Caxton Associates | Q4 2024 | 0.1% |
How has hedge fund ownership of MKTX changed?
| Quarter | Managers holding | Combined value |
|---|---|---|
| Q2 2026 | 12 | $127.4m |
| Q1 2026 | 11 | $362.2m |
| Q4 2025 | 8 | $190.0m |
| Q3 2025 | 8 | $296.5m |
| Q2 2025 | 10 | $302.7m |
| Q1 2025 | 9 | $267.2m |
| Q4 2024 | 8 | $284.6m |
| Q3 2024 | 9 | $341.5m |
| Q2 2024 | 6 | $161.7m |
| Q1 2024 | 7 | $132.7m |
| Q4 2023 | 8 | $330.5m |
| Q3 2023 | 7 | $238.5m |
| Q2 2023 | 5 | $538.6m |
| Q1 2023 | 5 | $801.2m |
| Q4 2022 | 5 | $508.1m |
| Q3 2022 | 7 | $531.6m |
Counts every tracked manager that disclosed MKTX in that quarter's filing, including managers that have since stopped filing.