| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 08/16/2023 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Employee Stock Option, Right to Buy | 14.3k | $29.53 | $422k | | 08/16/2023 |
| 08/16/2023 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Deferred Stock Units | 565 | $0.00 | $0 | | 08/16/2023 |
| 08/16/2023 | FIRST FINANCIAL BANKSHARES INC | FFIN | Payment of Exercise | Common Stock | 139 | $29.53 | $4.1k | | 08/16/2023 |
| 08/16/2023 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Common Stock | 4.1k | $0.00 | $0 | | 08/16/2023 |
| 08/16/2023 | FIRST FINANCIAL BANKSHARES INC | FFIN | Disposition | Common Stock | 565 | $0.00 | $0 | | 08/16/2023 |
| 02/13/2023 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 7k | $15.43 | $108k | | 02/13/2023 |
| 11/02/2022 | FIRST FINANCIAL BANKSHARES INC | FFIN | Payment of Exercise | Common Stock | 202 | $37.04 | $7.5k | | 11/02/2022 |
| 11/02/2022 | FIRST FINANCIAL BANKSHARES INC | FFIN | Payment of Exercise | Common Stock | 172 | $39.10 | $6.7k | | 11/02/2022 |
| 08/16/2022 | FIRST FINANCIAL BANKSHARES INC | FFIN | Payment of Exercise | Common Stock | 139 | $47.19 | $6.6k | | 08/16/2022 |
| 08/16/2022 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Common Stock | 1.7k | $0.00 | $0 | | 08/16/2022 |
| 08/16/2022 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Employee Stock Option, Right to Buy | 7k | $47.19 | $328.3k | | 08/16/2022 |
| 02/07/2022 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 7k | $15.43 | $108k | | 02/07/2022 |
| 10/27/2021 | FIRST FINANCIAL BANKSHARES INC | FFIN | Payment of Exercise | Common Stock | 595 | $48.85 | $29.1k | | 10/27/2021 |
| 06/07/2021 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 6k | $15.43 | $92.6k | | 06/07/2021 |
| 10/27/2020 | FIRST FINANCIAL BANKSHARES INC | FFIN | Payment of Exercise | Common Stock | 656 | $31.23 | $20.5k | | 10/27/2020 |
| 10/27/2020 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Common Stock | 2.5k | $0.00 | $0 | | 10/27/2020 |
| 03/04/2020 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 7k | $7.87 | $55.1k | | 03/04/2020 |
| 11/06/2019 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 7k | $7.87 | $55.1k | | 11/06/2019 |
| 10/22/2019 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Common Stock | 2.1k | $0.00 | $0 | | 10/22/2019 |
| 10/22/2019 | FIRST FINANCIAL BANKSHARES INC | FFIN | Payment of Exercise | Common Stock | 829 | $35.38 | $29.3k | | 10/22/2019 |
| 06/26/2019 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Employee Stock Option, Right to Buy | 10k | $29.70 | $297k | | 06/26/2019 |
| 02/06/2019 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 1000 | $15.73 | $15.7k | | 02/06/2019 |
| 02/06/2019 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 2k | $16.78 | $33.6k | | 02/06/2019 |
| 10/23/2018 | FIRST FINANCIAL BANKSHARES INC | FFIN | Payment of Exercise | Common Stock | 486 | $55.34 | $26.9k | | 10/23/2018 |
| 10/23/2018 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Common Stock | 1.4k | $0.00 | $0 | | 10/23/2018 |
| 05/02/2018 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 3k | $16.78 | $50.3k | | 05/02/2018 |
| 10/24/2017 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Common Stock | 1.6k | $0.00 | $0 | | 10/24/2017 |
| 06/12/2017 | FIRST FINANCIAL BANKSHARES INC | FFIN | Grant | Employee Stock Option, Right to Buy | 10k | $42.35 | $423.5k | | 06/12/2017 |
| 12/08/2016 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 1000 | $13.66 | $13.7k | | 12/09/2016 |
| 06/09/2015 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 2k | $13.66 | $27.3k | | 06/09/2015 |
| 01/23/2015 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option, Right to Buy | 2k | $11.03 | $22.1k | | 01/23/2015 |
| 02/24/2014 | FIRST FINANCIAL BANKSHARES INC | FFIN | Exercise | Employee Stock Option (Right to Buy) | 1.5k | $22.05 | $33.1k | | 02/24/2014 |