Montrose Environmental at a Glance

We Have Consistently Created Value for Our Shareholders • Organic Earnings Growth (+) Average annual organic revenue growth(¹) of ~ 16% since 2020 and ~13% since 2018 Revenue synergies catalyze cross-selling success by creating environmental value for clients Positioned to continue growing organic revenue at a mid-to-high single digit rate over the next several years Successful investments in R&D can further organic growth opportunities and increase barriers to entry • • Strategically Additive Acquisitions (+) Acquisitions represent a core part of growth strategy within a highly fragmented environmental market - Environmental services industry comprised of thousands of firms Strategic acquisitions purchased at attractive values can generate significant shareholder value over time M&A objective to acquire an expected $10-15 million of annualized EBITDA per year at attractive multiples (1) Excludes discontinued service lines, which generated revenues of $17.1 million in 2020, $12.1 million in 2021, and $3.6 million in 2022. See the appendix for a discussion of how we calculate organic growth. © 2023 Montrose Environmental Group, Inc. Proprietary. 10

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