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 | 11.58 | 4,075,154 | +8.8 | 03/31/2026 |
| PRIMECAP Management Company | 9.96 | 3,504,905 | +4.7 | 06/30/2026 |
| AQR Capital Management LLC | 7.63 | 2,683,745 | +4.9 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 6.15 | 2,163,671 | +0.0 | 03/31/2026 |
| North Reef Capital Management LP | 5.33 | 1,875,000 | +16.5 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.57 | 1,609,259 | +0.0 | 03/31/2026 |
| FMR Inc | 4.32 | 1,519,421 | -24.2 | 03/31/2026 |
| State Street Corp | 3.64 | 1,280,857 | +2.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.15 | 2,162,797 | +0.0 | 08/31/2026 |
| 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 | 11,486 | 1,875,664 $ | Sep 10, 2026 | direct |
| Chwick Jane | Director | 9,223 | 1,506,116 $ | Aug 7, 2026 | direct |
| Cruger William Frank Jr. | Director | 4,033 | 658,589 $ | Sep 10, 2026 | direct |
| Portney Emily Hope | Director | 1,571 | 256,544 $ | 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 |
|---|---|---|---|---|---|---|
| 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: September 17, 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.