🕵️ Marketaxess Holdings Inc ($MKTX)
SEC insider & ownership activity, last 12 months · CIK 1278021 · every row links its SEC filing
Over the last 12 months insiders sold $1.2M with no open-market buying against it. Cruger William Frank Jr. sold $1.0M in discretionary trades (Sep). BlackRock, Inc. added 9.9% → 10.9%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 2 sellers, $1.2M (11 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Cruger William Frank Jr. | 0 | – | 1 | $1.0M | Sep 10, 2026 |
| Pintoff Scott | 0 | – | 10 | $158K | Sep 10, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| BlackRock, Inc. | 10.9% | 13G | Feb 6, 2026 | filing ↗ | |
| Primecap Management CO/CA/ | 9.9% | 13G | Aug 6, 2026 | filing ↗ | |
| North REEF Capital Management LP | 9.6% | 13G | Aug 14, 2026 | filing ↗ | |
| North REEF Capital Management GP LLC | 9.6% | 13G | Aug 14, 2026 | filing ↗ | |
| James Hanna, III | 9.6% | 13G | Aug 14, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 6.1% | 13G | Apr 29, 2026 | filing ↗ | |
| AQR Capital Management, LLC | 5.6% | 13G | Aug 13, 2026 | filing ↗ | |
| AQR Capital Management Holdings, LLC | 5.6% | 13G | Aug 13, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.3% | 13G | Apr 30, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| William Frank Cruger, JR. | $1.0M | Sep 10, 2026 | filing ↗ |
| Pintoff Scott | $49K | Aug 10, 2026 | filing ↗ |
| Pintoff Scott | $44K | May 11, 2026 | filing ↗ |
| Pintoff Scott | $67K | Jan 12, 2026 | filing ↗ |
| Pintoff Scott | $18K | Dec 12, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 30, 2026 | filing ↗ |
| Other events (8.01) | Jul 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 30, 2026 | filing ↗ |
| Material agreement (1.01) | Jul 29, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jul 29, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 29, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 10, 2026 | filing ↗ |
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Other events (8.01) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 16, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 4, 2026 | filing ↗ |
| Earnings (2.02) | Feb 4, 2026 | filing ↗ |
| New financial obligation (2.03) | Feb 4, 2026 | filing ↗ |
| Other events (8.01) | Feb 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 4, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 22, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 22, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 22, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 9, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 9, 2025 | filing ↗ |
| Earnings (2.02) | Nov 7, 2025 | filing ↗ |
| Other events (8.01) | Nov 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 7, 2025 | filing ↗ |