Who owns MARKETAXESS HOLDINGS INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of MKTX from SEC Form 13F filings across 398 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 398 institutions disclosed 39.1M shares of MARKETAXESS HOLDINGS INC worth $4.43B — about 111% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
398
13F holders
$4.43B
value, 2026 filers
111%
of shares outstanding (39.1M sh)
64
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of MKTX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.0M | $453.9M | 0.0% | 11.4% | -1.8% |
| 2 | PRIMECAP MANAGEMENT CO/CA/ | 3.5M | $397.8M | 0.2% | 10% | +4.7% |
| 3 | North Reef Capital Management LP | 3.4M | $385.3M | 14.8% | 9.6% | +81.1% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.1M | $238.4M | 0.0% | 6% | -2.9% |
| 5 | AQR CAPITAL MANAGEMENT LLC | 2.0M | $222.8M | 0.1% | 5.6% | -26.0% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | $175.5M | 0.0% | 4.4% | -3.9% |
| 7 | FMR LLC | 1.4M | $159.5M | 0.0% | 4% | -7.5% |
| 8 | STATE STREET CORP | 1.3M | $145.4M | 0.0% | 3.6% | +0.1% |
| 9 | NEUBERGER BERMAN GROUP LLC | 1.2M | $139.6M | 0.1% | 3.5% | +27.3% |
| 10 | GOLDMAN SACHS GROUP INC | 1.0M | $117.0M | 0.0% | 2.9% | +102.6% |
| 11 | BANK OF MONTREAL /CAN/ | 1.0M | $115.4M | 0.0% | 2.9% | -0.3% |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 994,772 | $112.9M | 0.0% | 2.8% | +15.3% |
| 13 | VAN ECK ASSOCIATES CORP | 924,617 | $104.9M | 0.1% | 2.6% | -25.4% |
| 14 | DIMENSIONAL FUND ADVISORS LP | 597,894 | $67.8M | 0.0% | 1.7% | +2.8% |
| 15 | NORGES BANKNEW | 572,422 | $65.0M | 0.0% | 1.6% | new |
| 16 | TWO SIGMA INVESTMENTS, LP | 543,890 | $61.7M | 0.0% | 1.5% | +3.8% |
| 17 | GUARDCAP ASSET MANAGEMENT Ltd | 536,324 | $62.2M | 4.4% | 1.5% | -16.6% |
| 18 | Azora Capital LPNEW | 513,081 | $58.2M | 2.5% | 1.5% | new |
| 19 | Davis Asset Management, L.P. | 500,000 | $56.7M | 1.4% | 1.4% | +359.4% |
| 20 | CITADEL ADVISORS LLC | 481,689 | $54.7M | 0.0% | 1.4% | +486.3% |
| 21 | JPMORGAN CHASE & CO | 438,001 | $48.3M | 0.0% | 1.2% | +1.2% |
| 22 | MORGAN STANLEY | 422,864 | $48.0M | 0.0% | 1.2% | -13.8% |
| 23 | LOS ANGELES CAPITAL MANAGEMENT LLC | 392,065 | $44.5M | 0.2% | 1.1% | +3992.1% |
| 24 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 330,815 | $37.5M | 0.0% | 0.9% | -2.3% |
| 25 | BANK OF AMERICA CORP /DE/ | 303,517 | $34.4M | 0.0% | 0.9% | +15.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.