| Date Filed | Type | Description |
| 10/10/2023 |
SC 13G/A
| ALGER ASSOCIATES INC reports a 3.6% stake in Montrose Environmental Group, Inc. |
| 08/09/2023 |
10-Q
| Quarterly Report for the period ended June 30, 2023 |
| 08/08/2023 |
8-K
| Quarterly results |
| 05/11/2023 |
8-K
| Submission of Matters to a Vote of Security Holders Interactive Data |
| 05/09/2023 |
8-K
| Quarterly results |
| 03/28/2023 |
ARS
| Form ARS - Annual Report to Security Holders: |
| 03/28/2023 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material: |
| 03/28/2023 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements: |
| 03/01/2023 |
S-8
| Form S-8 - Securities to be offered to employees in employee benefit plans: |
| 02/28/2023 |
8-K
| Quarterly results |
| 02/14/2023 |
SC 13G/A
| ALGER ASSOCIATES INC reports a 9.6% stake in Montrose Environmental Group, Inc. |
| 02/13/2023 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/13/2023 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 01/31/2023 |
SC 13G/A
| BlackRock Inc. reports a 7.2% stake in Montrose Environmental Group, Inc. |
| 11/09/2022 |
10-Q
| Quarterly Report for the period ended September 30, 2022 |
| 11/08/2022 |
8-K
| Quarterly results |
| 08/08/2022 |
8-K
| Quarterly results |
| 06/14/2022 |
8-K
| Quarterly results |
| 06/08/2022 |
8-K
| Quarterly results |
| 05/11/2022 |
8-K
| Quarterly results |
| 05/10/2022 |
10-Q
| Quarterly Report for the period ended March 31, 2022 |
| 05/09/2022 |
8-K
| Quarterly results |
| 04/08/2022 |
SC 13G/A
| ALGER ASSOCIATES INC reports a 10.7% stake in Montrose Environmental Group, Inc. |
| 03/29/2022 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material: |
| 03/29/2022 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements: |
| 03/28/2022 |
8-K
| Regulation FD Disclosure Interactive Data |
| 03/01/2022 |
S-8
| Form S-8 - Securities to be offered to employees in employee benefit plans: |
| 03/01/2022 |
10-K
| Annual Report for the period ended December 31, 2021 |
| 02/28/2022 |
8-K
| Quarterly results |
| 02/15/2022 |
5
| PERLMAN RICHARD E (Director) has filed a Form 5 on Montrose Environmental Group, Inc. |
| 02/14/2022 |
5
| PRICE JAMES K (Director) has filed a Form 5 on Montrose Environmental Group, Inc. |
| 02/14/2022 |
SC 13G
| UBS ASSET MANAGEMENT AMERICAS INC reports a 8.2% stake in MONTROSE ENVIRONMENTAL GROUP INC |
| 02/14/2022 |
SC 13G/A
| ALGER ASSOCIATES INC reports a 9.8% stake in Montrose Environmental Group, Inc. |
| 02/11/2022 |
SC 13G
| Form SC 13G - Statement of acquisition of beneficial ownership by individuals: |
|