Marketaxess Holdings Inc.
A fintech that runs electronic trading platforms where institutions buy and sell bonds and other fixed-income credit products, connecting roughly two thousand banks and investors worldwide through its X-Pro platform and "Open Trading" marketplace. It was born in 2000 as an internal project at J.P. Morgan before spinning out as an independent company. Its name is a portmanteau of "market" and "access" — fitting, since its founder set out to modernize a bond market that then ran mostly by phone.
| Holder | Schedule | % of class | Shares | Filed |
|---|---|---|---|---|
| North Reef Capital Management LP | 13G/APassive | 9.55% | 3.40M | Aug 14, 2026 |
| North Reef Capital Management GP LLC | 13G/APassive | 9.55% | 3.40M | Aug 14, 2026 |
| James Hanna, III | 13G/APassive | 9.55% | 3.40M | Aug 14, 2026 |
| AQR Capital Management, LLC | 13G/APassive | 5.59% | 1.99M | Aug 13, 2026 |
| AQR Capital Management Holdings, LLC | 13G/APassive | 5.59% | 1.99M | Aug 13, 2026 |
| PRIMECAP MANAGEMENT CO/CA/ | 13G/APassive | 9.86% | 3.50M | Aug 6, 2026 |
| FMR LLC | 13G/APassive | 4.2% | 1.50M | May 6, 2026 |
| Abigail P. Johnson | 13G/APassive | 4.2% | 1.50M | May 6, 2026 |
| Vanguard Capital Management | 13GPassive | 5.32% | 1.89M | Apr 30, 2026 |
| Vanguard Portfolio Management | 13GPassive | 6.09% | 2.17M | Apr 29, 2026 |