| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 03/03/2023 | MARKETAXESS HOLDINGS INC | MKTX | Sale | Common Stock, par value $0.003 per share | 604 | $366.58 | $221.4k | | 03/03/2023 |
| 01/18/2023 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 429 | $0.00 | $0 | | 01/18/2023 |
| 06/07/2022 | MARKETAXESS HOLDINGS INC | MKTX | Sale | Common Stock, par value $0.003 per share | 1.7k | $285.03 | $496k | | 06/07/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 73 | $344.48 | $25.1k | | 01/31/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 68 | $344.48 | $23.4k | | 01/31/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 749 | $344.48 | $258k | | 01/31/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 175 | $344.48 | $60.3k | | 01/31/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 392 | $344.48 | $135k | | 01/31/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 92 | $344.48 | $31.7k | | 01/31/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 1.2k | $0.00 | $0 | | 01/31/2022 |
| 05/26/2021 | MARKETAXESS HOLDINGS INC | MKTX | Sale | Common Stock, par value $0.003 per share | 967 | $465.08 | $449.7k | | 05/26/2021 |
| 03/01/2021 | MARKETAXESS HOLDINGS INC | MKTX | Sale | Common Stock, par value $0.003 per share | 2.1k | $575.00 | $1.2M | | 03/01/2021 |
| 01/31/2021 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 116 | $540.76 | $62.7k | | 01/31/2021 |
| 01/31/2021 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 92 | $540.76 | $49.7k | | 01/31/2021 |
| 01/31/2021 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 70 | $540.76 | $37.9k | | 01/31/2021 |
| 01/31/2021 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 118 | $540.76 | $63.8k | | 01/31/2021 |
| 01/31/2021 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 208 | $540.76 | $112.5k | | 01/31/2021 |
| 01/31/2021 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 392 | $540.76 | $212k | | 01/31/2021 |
| 01/31/2021 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 889 | $540.76 | $480.7k | | 01/31/2021 |
| 01/15/2021 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 451 | $0.00 | $0 | | 01/15/2021 |
| 05/04/2020 | MARKETAXESS HOLDINGS INC | MKTX | Sale | Common Stock, par value $0.003 per share | 1.9k | $457.00 | $877.4k | | 05/04/2020 |
| 04/01/2020 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 1.8k | $0.00 | $0 | | 04/01/2020 |
| 04/01/2020 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 860 | $333.99 | $287.2k | | 04/01/2020 |
| 01/29/2020 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 4.3k | $0.00 | $0 | | 01/29/2020 |
| 01/15/2020 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 434 | $0.00 | $0 | | 01/15/2020 |
| 01/31/2019 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 498 | $0.00 | $0 | | 01/31/2019 |
| 01/31/2019 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 3.6k | $0.00 | $0 | | 01/31/2019 |
| 01/31/2019 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 119 | $214.77 | $25.6k | | 01/31/2019 |
| 01/15/2019 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 3.1k | $0.00 | $0 | | 01/15/2019 |
| 01/15/2018 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 743 | $0.00 | $0 | | 01/15/2018 |