MarketAxess Holdings, Inc.
MKTX institutional ownership changes in Q2 2026: 90 institutions opened or added positions, 111 trimmed or exited. MKTX (MarketAxess Holdings, Inc.) is held by 196 institutional investors as of Q2 2026. Top institutional shareholders: BlackRock, Inc. ($453.9M), PRIMECAP Management Co. ($397.8M), Vanguard Portfolio Management LLC ($238.4M). Institutions were selling, on balance.
Who's Trading
Latest move
Source dates: Price Nov 5, 2026 · Insiders Oct 13, 2026 · Activists Nov 5, 2026 · Congress May 19, 2026
Top Holders
| Action | ||||||
|---|---|---|---|---|---|---|
Decreased | 4M(-1.9%) | $453.9M | 0.0% | -20.16% | 0 | |
Increased | 3.5M(+4.7%) | $397.8M | 0.2% | -16.63% | 39 | |
Decreased | 2.1M(-2.9%) | $238.4M | 0.0% | +1.47% | 0 | |
Decreased | 2M(-25.9%) | $222.8M | 0.1% | -12.07% | 0 | |
Decreased | 1.5M(-3.9%) | $175.5M | 0.0% | +1.47% | 0 | |
Decreased | 1.4M(-7.5%) | $159.5M | 0.0% | -27.18% | 0 | |
Increased | 1.3M(+0.1%) | $145.4M | 0.0% | -45.10% | 30 | |
Increased | 1.2M(+27.3%) | $139.6M | 0.1% | +3.95% | 38 | |
Increased | 1M(+102.6%) | $117M | 0.0% | +14.21% | 49 | |
Decreased | 1M(-0.3%) | $115.4M | 0.0% | -7.49% | 0 | |
Increased | 994,772(+15.3%) | $112.9M | 0.0% | -28.31% | 35 | |
Increased | 597,894(+2.8%) | $67.8M | 0.0% | -28.67% | 30 | |
Increased | 543,890(+3.8%) | $61.7M | 0.0% | -12.73% | 31 | |
Increased | 481,689(+486.3%) | $54.7M | 0.0% | +29.50% | 47 | |
Increased | 438,001(+1.2%) | $48.3M | 0.0% | -27.79% | 30 | |
Decreased | 422,864(-13.8%) | $48M | 0.0% | -15.00% | 0 | |
Increased | 392,065(+3992.1%) | $44.5M | 0.2% | +43.42% | 56 | |
Decreased | 330,815(-2.3%) | $37.5M | 0.0% | -30.18% | 0 | |
Increased | 303,517(+15.0%) | $34.4M | 0.0% | -15.54% | 33 | |
Increased | 278,745(+2.4%) | $31.6M | 0.0% | -10.88% | 30 |
Showing 1-20 of 211
MKTXMarketAxess Holdings, Inc.Continue exploring
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CCitigroup, Inc.Questions investors ask about MKTX
Who owns MKTX?
196 institutional investors held MKTX on June 30, 2026, led by BlackRock, Inc. ($453.9M), PRIMECAP Management Co. ($397.8M) and Vanguard Portfolio Management LLC ($238.4M).
How many hedge funds hold MKTX?
196 institutional investors reported MKTX in their 13F filings for the quarter ended June 30, 2026, $3.5B in all. 10 of them are rated Elite.
Are institutions buying or selling MKTX?
Selling, on balance. In Q2 2026, 111 institutions trimmed or exited MKTX and 90 institutions opened or added to positions.
Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer