MARKETAXESS HLDGS INC (MKTX): Institutional Ownership
Hedge funds and institutional managers reporting a position in MKTX · Financials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
23
13F filers
Aggregate Value
$784.6M
Across holders
Last Price
$112.54
2026-06-26
Sector
Financials
GICS
Holder activity9 new5 added8 reduced
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| PRIMECAP MANAGEMENT CO/CA/ CIK 0000763212 | Institutional Manager | 3.35M | $552.2M | 70.4% | 0.4% | Added | +$28.3M | Q1 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 524K | $86.5M | 11.0% | 0.1% | Reduced | $-1.6M | Q1 2026 |
| Walleye Capital LLC CIK 0001758720 | Hedge Fund | 333K | $54.9M | 7.0% | 0.2% | Added | +$54.8M | Q1 2026 |
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 167K | $27.6M | 3.5% | 0.0% | Reduced | $-1.5M | Q1 2026 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 65K | $11.3M | 1.4% | 0.0% | New | — | Q3 2025 |
| Gotham Asset Management, LLC CIK 0001510387 | Hedge Fund | 60K | $9.9M | 1.3% | 0.0% | Added | +$5.2M | Q1 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 0001165408 | Hedge Fund | 34K | $7.7M | 1.0% | 0.0% | New | — | Q2 2025 |
| Holocene Advisors, LP CIK 0001700574 | Hedge Fund | 44K | $7.2M | 0.9% | 0.0% | Reduced | $-28.2M | Q1 2026 |
| Schonfeld Strategic Advisors LLC CIK 0001665241 | Hedge Fund | 43K | $7.0M | 0.9% | 0.0% | Reduced | $-9.5M | Q1 2026 |
| TUDOR INVESTMENT CORP ET AL CIK 0000923093 | Hedge Fund | 24K | $4.3M | 0.5% | 0.0% | New | — | Q4 2025 |
| ExodusPoint Capital Management, LP CIK 0001736225 | Hedge Fund | 24K | $4.0M | 0.5% | 0.0% | New | — | Q1 2026 |
| Hudson Bay Capital Management LP CIK 0001393825 | Hedge Fund | 13K | $2.4M | 0.3% | 0.0% | New | — | Q4 2025 |
| Man Group plc CIK 0001637460 | Hedge Fund | 13K | $2.1M | 0.3% | 0.0% | Added | +$2.1M | Q1 2026 |
| Verition Fund Management LLC CIK 0001454027 | Hedge Fund | 9K | $1.7M | 0.2% | 0.0% | New | — | Q4 2025 |
| MOORE CAPITAL MANAGEMENT, LP CIK 0001448574 | Hedge Fund | 5K | $1.1M | 0.1% | 0.0% | New | — | Q2 2025 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 6K | $1.1M | 0.1% | 0.0% | Reduced | $-5.1M | Q1 2026 |
| Bridgewater Associates, LP CIK 0001350694 | Hedge Fund | 6K | $925K | 0.1% | 0.0% | Reduced | $-1.3M | Q1 2026 |
| Brevan Howard Capital Management LP CIK 0001512857 | Hedge Fund | 4K | $777K | 0.1% | 0.0% | New | — | Q4 2025 |
| CAXTON ASSOCIATES LLP CIK 0002051323 | Hedge Fund | 3K | $703K | 0.1% | 0.0% | New | — | Q2 2025 |
| BAILLIE GIFFORD & CO CIK 0001088875 | Institutional Manager | 4K | $673K | 0.1% | 0.0% | Added | +$134K | Q1 2026 |
Added
Institutional Manager
$552.2M· 70.4% of total· 0.4% port· 3.35M sh· +$28.3M QoQ· Q1 2026
Reduced
Hedge Fund
$86.5M· 11.0% of total· 0.1% port· 524K sh· $-1.6M QoQ· Q1 2026
Added
Hedge Fund
$54.9M· 7.0% of total· 0.2% port· 333K sh· +$54.8M QoQ· Q1 2026
Reduced
Hedge Fund
$27.6M· 3.5% of total· 0.0% port· 167K sh· $-1.5M QoQ· Q1 2026
New
Hedge Fund
$11.3M· 1.4% of total· 0.0% port· 65K sh· — QoQ· Q3 2025
Added
Hedge Fund
$9.9M· 1.3% of total· 0.0% port· 60K sh· +$5.2M QoQ· Q1 2026
New
Hedge Fund
$7.7M· 1.0% of total· 0.0% port· 34K sh· — QoQ· Q2 2025
Reduced
Hedge Fund
$7.2M· 0.9% of total· 0.0% port· 44K sh· $-28.2M QoQ· Q1 2026
Reduced
Hedge Fund
$7.0M· 0.9% of total· 0.0% port· 43K sh· $-9.5M QoQ· Q1 2026
New
Hedge Fund
$4.3M· 0.5% of total· 0.0% port· 24K sh· — QoQ· Q4 2025
New
Hedge Fund
$4.0M· 0.5% of total· 0.0% port· 24K sh· — QoQ· Q1 2026
New
Hedge Fund
$2.4M· 0.3% of total· 0.0% port· 13K sh· — QoQ· Q4 2025
Added
Hedge Fund
$2.1M· 0.3% of total· 0.0% port· 13K sh· +$2.1M QoQ· Q1 2026
New
Hedge Fund
$1.7M· 0.2% of total· 0.0% port· 9K sh· — QoQ· Q4 2025
New
Hedge Fund
$1.1M· 0.1% of total· 0.0% port· 5K sh· — QoQ· Q2 2025
Reduced
Hedge Fund
$1.1M· 0.1% of total· 0.0% port· 6K sh· $-5.1M QoQ· Q1 2026
Reduced
Hedge Fund
$925K· 0.1% of total· 0.0% port· 6K sh· $-1.3M QoQ· Q1 2026
New
Hedge Fund
$777K· 0.1% of total· 0.0% port· 4K sh· — QoQ· Q4 2025
New
Hedge Fund
$703K· 0.1% of total· 0.0% port· 3K sh· — QoQ· Q2 2025
Added
Institutional Manager
$673K· 0.1% of total· 0.0% port· 4K sh· +$134K QoQ· Q1 2026
Reduced
Hedge Fund
$660K· 0.1% of total· 0.0% port· 4K sh· $-4.7M QoQ· Q1 2026
Unchanged
Institutional Manager
$4K· 0.0% of total· 0.0% port· 22 sh· +$0 QoQ· Q1 2026
Reduced
Hedge Fund
$1K· 0.0% of total· 0.0% port· 9 sh· $-17K QoQ· Q1 2026
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