X0306 4 2022-02-28 0 0001643615 Montrose Environmental Group, Inc. MEG 0001817845 Revuelta Jose 5120 NORTHSHORE DR NORTH LITTLE ROCK AR 72118 0 1 0 0 Chief Strategy Officer Stock Option (Right to Buy) 44.11 2022-02-28 4 A 0 35503 0.00 A 2032-02-28 Common Stock 35503 35503 D This option represents the right to purchase a total of 35,503 shares of the Common Stock of the Issuer which will vest in two equal annual installments on August 28, 2022 and February 28, 2023, subject to the Reporting Person's continued service to the Issuer. /s/ Nasym Afsari, Attorney in Fact 2022-03-03