| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 02/17/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 13.6k | $54.17 | $737.9k | | 02/16/2023 |
| 02/16/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 400 | $54.15 | $21.7k | | 02/16/2023 |
| 02/03/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 600 | $54.04 | $32.4k | | 02/02/2023 |
| 02/02/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 52k | $54.30 | $2.8M | | 02/02/2023 |
| 02/01/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 21.5k | $54.18 | $1.2M | | 01/30/2023 |
| 01/31/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 18.2k | $53.08 | $968.2k | | 01/30/2023 |
| 01/31/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 24.8k | $54.15 | $1.3M | | 01/30/2023 |
| 01/30/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 23.8k | $52.86 | $1.3M | | 01/30/2023 |
| 01/27/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 12.9k | $52.87 | $679.5k | | 01/25/2023 |
| 01/27/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 1.4k | $53.60 | $75k | | 01/25/2023 |
| 01/25/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 400 | $52.55 | $21k | | 01/25/2023 |
| 01/24/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 21.9k | $52.97 | $1.2M | | 01/23/2023 |
| 01/23/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 31k | $52.72 | $1.6M | | 01/23/2023 |
| 01/20/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 23.8k | $52.69 | $1.3M | | 01/18/2023 |
| 01/18/2023 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 22.7k | $52.76 | $1.2M | | 01/18/2023 |
| 01/01/2023 | Montrose Environmental Group, Inc. | | Grant | Common Stock | 2.5k | $0.00 | $0 | | 01/01/2023 |
| 01/01/2022 | Montrose Environmental Group, Inc. | | Grant | Common Stock | 1.6k | $0.00 | $0 | | 01/01/2022 |
| 10/27/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 3.9k | $65.02 | $251.3k | | 10/25/2021 |
| 10/26/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 46.4k | $65.37 | $3M | | 10/25/2021 |
| 10/26/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 9.6k | $66.40 | $638.6k | | 10/25/2021 |
| 10/26/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 1.6k | $67.09 | $107.7k | | 10/25/2021 |
| 10/25/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 31.2k | $65.19 | $2M | | 10/25/2021 |
| 10/22/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 6.5k | $64.20 | $414.4k | | 10/20/2021 |
| 10/21/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 3.3k | $64.95 | $214.9k | | 10/20/2021 |
| 10/21/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 22.7k | $63.96 | $1.5M | | 10/20/2021 |
| 10/21/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 40.1k | $63.55 | $2.6M | | 10/20/2021 |
| 10/20/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 34.6k | $62.71 | $2.2M | | 10/20/2021 |
| 10/19/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 100 | $62.62 | $6.3k | | 10/15/2021 |
| 10/19/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 13.2k | $60.96 | $806.7k | | 10/15/2021 |
| 10/19/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 1.6k | $61.61 | $97.4k | | 10/15/2021 |
| 10/18/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 37.8k | $64.08 | $2.4M | | 10/15/2021 |
| 10/18/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 15.4k | $63.10 | $969k | | 10/15/2021 |
| 10/18/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 200 | $62.15 | $12.4k | | 10/15/2021 |
| 10/15/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 10.4k | $61.67 | $638.5k | | 10/15/2021 |
| 10/15/2021 | Montrose Environmental Group, Inc. | | Sale | Common Stock | 20k | $62.44 | $1.3M | | 10/15/2021 |
|