| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 08/14/2023 | MARKETAXESS HOLDINGS INC | MKTX | Purchase | Common Stock, par value $0.003 per share | 104 | $235.10 | $24.5k | | 08/14/2023 |
| 08/14/2023 | MARKETAXESS HOLDINGS INC | MKTX | Purchase | Common Stock, par value $0.003 per share | 404 | $236.49 | $95.5k | | 08/14/2023 |
| 08/14/2023 | MARKETAXESS HOLDINGS INC | MKTX | Purchase | Common Stock, par value $0.003 per share | 2.2k | $238.05 | $524.4k | | 08/14/2023 |
| 08/14/2023 | MARKETAXESS HOLDINGS INC | MKTX | Purchase | Common Stock, par value $0.003 per share | 900 | $239.26 | $215.3k | | 08/14/2023 |
| 08/14/2023 | MARKETAXESS HOLDINGS INC | MKTX | Purchase | Common Stock, par value $0.003 per share | 600 | $240.16 | $144.1k | | 08/14/2023 |
| 08/14/2023 | MARKETAXESS HOLDINGS INC | MKTX | Purchase | Common Stock, par value $0.003 per share | 59 | $240.90 | $14.2k | | 08/14/2023 |
| 04/03/2023 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Performance Stock Units | 5k | $0.00 | $0 | | 04/03/2023 |
| 04/03/2023 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 2.7k | $0.00 | $0 | | 04/03/2023 |
| 01/31/2023 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 512 | $363.85 | $186.3k | | 01/31/2023 |
| 01/31/2023 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 1.5k | $363.85 | $556k | | 01/31/2023 |
| 01/31/2023 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 195 | $363.85 | $71k | | 01/31/2023 |
| 01/31/2023 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 313 | $363.85 | $113.9k | | 01/31/2023 |
| 01/18/2023 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 3k | $0.00 | $0 | | 01/18/2023 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Stock Option (right to buy) | 6.3k | $344.48 | $2.2M | | 01/31/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 202 | $344.48 | $69.6k | | 01/31/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 511 | $344.48 | $176k | | 01/31/2022 |
| 01/31/2022 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 1.8k | $0.00 | $0 | | 01/31/2022 |
| 01/22/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 3.9k | $364.58 | $1.4M | | 01/22/2022 |
| 01/22/2022 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 2.4k | $364.58 | $868.4k | | 01/22/2022 |
| 01/31/2021 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 505 | $540.76 | $273.1k | | 01/31/2021 |
| 01/22/2021 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 3.8k | $509.70 | $1.9M | | 01/22/2021 |
| 01/15/2021 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 1.2k | $0.00 | $0 | | 01/15/2021 |
| 01/15/2021 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Stock Option (right to buy) | 4.4k | $523.00 | $2.3M | | 01/15/2021 |
| 01/22/2020 | MARKETAXESS HOLDINGS INC | MKTX | Payment of Exercise | Common Stock, par value $0.003 per share | 3.8k | $370.44 | $1.4M | | 01/22/2020 |
| 01/15/2020 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 3k | $0.00 | $0 | | 01/15/2020 |
| 06/12/2019 | MARKETAXESS HOLDINGS INC | MKTX | Exercise | Performance Shares | 9.9k | $0.00 | $0 | | 06/12/2019 |
| 05/14/2019 | MARKETAXESS HOLDINGS INC | MKTX | Exercise | Performance Shares | 9k | $0.00 | $0 | | 05/14/2019 |
| 01/22/2019 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Performance Shares | 9.9k | $0.00 | $0 | | 01/22/2019 |
| 01/22/2019 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Performance Shares | 9k | $0.00 | $0 | | 01/22/2019 |
| 01/22/2019 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Employee Stock Option (right to buy | 41.2k | $294.71 | $12.1M | | 01/22/2019 |
| 01/22/2019 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Employee Stock Option (right to buy | 35.7k | $272.88 | $9.7M | | 01/22/2019 |
| 01/22/2019 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 4.7k | $0.00 | $0 | | 01/22/2019 |
| 01/22/2019 | MARKETAXESS HOLDINGS INC | MKTX | Grant | Common Stock, par value $0.003 per share | 23.3k | $0.00 | $0 | | 01/22/2019 |
| 01/13/2019 | Cboe Global Markets, Inc. | CBOE | Payment of Exercise | Common Stock | 802 | $91.39 | $73.3k | | 01/13/2019 |
| 12/15/2018 | Cboe Global Markets, Inc. | CBOE | Payment of Exercise | Common Stock | 5.1k | $100.89 | $518.7k | | 12/15/2018 |
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