MKTX Institutional Ownership
Top institutional (13F) holders of MKTX and 5%+ (13D/G) positions, sourced from SEC EDGAR.
Institutional owners
49
Institutional value
$3.07B
Top holder
BlackRock, Inc.
Top holders
| Holder | Stake | Filed | Value |
|---|---|---|---|
| BlackRock, Inc.holding company | 11.4% | Aug 7, 2026 | $453.94M |
| PRIMECAP MANAGEMENT CO/CA/investment advisor | 10.0% | Aug 14, 2026 | $397.77M |
| Vanguard Portfolio Managementinvestment advisor | 6.0% | Aug 13, 2026 | $238.36M |
| AQR CAPITAL MANAGEMENT LLCinvestment advisor | 5.6% | Aug 14, 2026 | $222.76M |
| Vanguard Capital Managementinvestment advisor | 4.4% | Aug 13, 2026 | $175.53M |
| GEODE CAPITAL MANAGEMENT, LLCinvestment advisor | 2.8% | Nov 6, 2026 | $162.07M |
| FMR LLCinvestment advisor | 4.0% | Aug 13, 2026 | $159.45M |
| STATE STREET CORPORATIONholding company | 3.6% | Sep 22, 2026 | $145.43M |
| Neuberger Berman Group LLCinvestment advisor | 3.5% | Oct 27, 2026 | $139.58M |
| MILLENNIUM MANAGEMENT LLCinvestment advisor | 3.3% | Aug 14, 2026 | $131.23M |
| GOLDMAN SACHS GROUP INCinvestment advisor | 2.9% | Aug 14, 2026 | $117.04M |
| Dimensional Fund Advisors LPinvestment advisor | 1.2% | Nov 4, 2026 | $69.89M |
| Norges Bankother | 1.6% | Aug 12, 2026 | $64.96M |
| CITADEL ADVISORS LLCinvestment advisor | 1.6% | Sep 1, 2026 | $62.25M |
| TWO SIGMA INVESTMENTS, LPinvestment advisor | 1.5% | Aug 14, 2026 | $61.73M |
| CITIGROUP INCinvestment advisor | 0.9% | Nov 4, 2026 | $51.71M |
| JPMORGAN CHASE & COholding company | 1.2% | Aug 12, 2026 | $48.33M |
| MORGAN STANLEYholding company | 1.2% | Aug 13, 2026 | $47.99M |
| Bank of New York Mellon Corpholding company | 0.7% | Nov 5, 2026 | $37.66M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INCinvestment advisor | 0.9% | Aug 14, 2026 | $37.54M |
| BANK OF AMERICA CORP /DE/holding company | 0.9% | Aug 14, 2026 | $34.45M |
| UBS Group AGbank | 0.8% | Aug 13, 2026 | $31.63M |
| NORTHERN TRUST CORPinvestment advisor | 0.7% | Aug 13, 2026 | $27.98M |
| RENAISSANCE TECHNOLOGIES LLCinvestment advisor | 0.6% | Aug 13, 2026 | $22.7M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLPinvestment advisor | 0.5% | Aug 14, 2026 | $21.88M |
5%+ holders
Current stakes of 5% or more from Schedule 13D and 13G filings. A joint filing shows once, under its lead filer.
| Holder | Form | Stake | Filed |
|---|---|---|---|
| BlackRock, Inc.holding company | SC 13G/A | 10.9% | Feb 6, 2026 |
| North Reef Capital Management GP LLCotherwith James Hanna, III and North Reef Capital Management LP | SC 13G/A | 9.6% | Aug 14, 2026 |
| PRIMECAP MANAGEMENT CO/CA/investment advisor | SC 13G/A | 7.0% | Nov 5, 2026 |
| Vanguard Portfolio Managementinvestment advisor | SC 13G | 6.1% | Apr 29, 2026 |
| AQR CAPITAL MANAGEMENT LLCinvestment advisorwith AQR Capital Management Holdings, LLC | SC 13G/A | 5.6% | Aug 13, 2026 |
| Vanguard Capital Managementinvestment advisor | SC 13G | 5.3% | Apr 30, 2026 |
Institutional ownership for companies related to MKTX
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Source: SEC EDGAR Schedule 13D / 13G and 13F filings.