Investor Presentation November 2023

Investment Highlights Unique, vertically integrated environmental company Significant scale with global reach serving repeat client base Large TAM and secular tailwinds backed by regulatory and corporate initiatives Consistent record of strategically and financially accretive acquisitions coupled with strong organic growth Consistently resilient across political and economic cycles with diverse customers and end markets Record of strong financial performance & cash flow generation Differentiated, patent protected technology, processes and software providing significant competitive advantages in a highly fragmented industry Experienced management team coupled with a team-centric culture © 2023 Montrose Environmental Group, Inc. Proprietary. | 5

View entire presentation