MarketAxess Holdings Inc
Ownership
Ownership Structure
Who owns MarketAxess Holdings Inc (MKTX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 84.2% of the shares are freely tradable; institutional investors hold 112.1%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.36 | 3,999,836 | -1.8 | 06/30/2026 |
| PRIMECAP Management Company | 9.96 | 3,504,905 | +4.7 | 06/30/2026 |
| North Reef Capital Management LP | 9.65 | 3,395,000 | +81.1 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.97 | 2,100,273 | -2.9 | 06/30/2026 |
| AQR Capital Management LLC | 5.65 | 1,987,288 | -26.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.39 | 1,546,670 | -3.9 | 06/30/2026 |
| FMR Inc | 3.99 | 1,404,998 | -7.5 | 06/30/2026 |
| State Street Corp | 3.64 | 1,281,769 | +0.1 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.99 | 2,106,790 | +0.0 | 09/30/2026 |
| Vanguard Capital Opportunity Inv | 5.21 | 1,833,050 | +0.0 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Pintoff Scott | General Counsel and Secretary | 11,386 | 1,882,106 $ | Oct 12, 2026 | direct |
| Chwick Jane | Director | 9,223 | 1,524,562 $ | Aug 7, 2026 | direct |
| Cruger William Frank Jr. | Director | 4,033 | 666,655 $ | Sep 10, 2026 | direct |
| Portney Emily Hope | Director | 1,571 | 259,686 $ | Aug 12, 2026 | indirect |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 12, 2026 | Pintoff Scott | General Counsel and Secretary | Sell | 100 | 164.65 | 16,465 |
| Sep 10, 2026 | Pintoff Scott | General Counsel and Secretary | Sell | 100 | 163.32 | 16,332 |
| Sep 10, 2026 | Cruger William Frank Jr. | Director | Sell | 6,164 | 163.20 | 1,005,965 |
| Aug 12, 2026 | Portney Emily Hope | Director | Other | 2,085 | 0.00 | – |
| Aug 10, 2026 | Pintoff Scott | General Counsel and Secretary | Sell | 100 | 162.60 | 16,260 |
| Aug 7, 2026 | Chwick Jane | Director | Other | 606 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.