| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 02/28/2023 | Mayville Engineering Company, Inc. | MEC | Grant | Stock Option (right to buy) | 40.4k | $16.22 | $655.5k | | 02/28/2023 |
| 02/28/2023 | Mayville Engineering Company, Inc. | MEC | Grant | Restricted Stock Units | 23.1k | $0.00 | $0 | | 02/28/2023 |
| 02/28/2023 | Mayville Engineering Company, Inc. | MEC | Exercise | Restricted Stock Units | 17.4k | $0.00 | $0 | | 02/28/2023 |
| 02/28/2023 | Mayville Engineering Company, Inc. | MEC | Exercise | Restricted Stock Units | 8k | $0.00 | $0 | | 02/28/2023 |
| 02/28/2023 | Mayville Engineering Company, Inc. | MEC | Payment of Exercise | Common Stock | 7.3k | $16.06 | $117k | | 02/28/2023 |
| 02/28/2022 | Mayville Engineering Company, Inc. | MEC | Grant | Stock Option (right to buy) | 67.2k | $10.32 | $693.1k | | 02/28/2022 |
| 02/28/2022 | Mayville Engineering Company, Inc. | MEC | Grant | Restricted Stock Units | 34.9k | $0.00 | $0 | | 02/28/2022 |
| 02/28/2022 | Mayville Engineering Company, Inc. | MEC | Exercise | Restricted Stock Units | 10.5k | $0.00 | $0 | | 02/28/2022 |
| 02/28/2022 | Mayville Engineering Company, Inc. | MEC | Exercise | Restricted Stock Units | 8k | $0.00 | $0 | | 02/28/2022 |
| 02/28/2022 | Mayville Engineering Company, Inc. | MEC | Payment of Exercise | Common Stock | 5.3k | $10.32 | $54.8k | | 02/28/2022 |
| 05/08/2021 | Mayville Engineering Company, Inc. | MEC | Exercise | Restricted Stock Units | 559 | $0.00 | $0 | | 05/08/2021 |
| 02/28/2021 | Mayville Engineering Company, Inc. | MEC | Grant | Restricted Stock Units | 16.1k | $0.00 | $0 | | 02/27/2021 |
| 02/28/2021 | Mayville Engineering Company, Inc. | MEC | Grant | Stock Option (right to buy) | 32.5k | $14.01 | $454.9k | | 02/27/2021 |
| 02/27/2021 | Mayville Engineering Company, Inc. | MEC | Payment of Exercise | Common Stock | 3.3k | $14.01 | $46.9k | | 02/27/2021 |
| 02/27/2021 | Mayville Engineering Company, Inc. | MEC | Exercise | Restricted Stock Units | 10.5k | $0.00 | $0 | | 02/27/2021 |
| 05/08/2020 | Mayville Engineering Company, Inc. | MEC | Exercise | Restricted Stock Units | 559 | $0.00 | $0 | | 05/08/2020 |