Montrose Environmental Group

No. The firm has rebranded to Onterris, and all legacy Montrose web properties now redirect to a holding page that describes Montrose as ‘part of Onterris, a unified global environmental solutions company.’ The exact transaction or corporate restructuring that created this unified entity has not been publicly detailed.

The capital structure is not publicly disclosed. Neither a family office designation, an RIA registration, nor a fund prospectus has been identified. The firm’s operating model — integrating environmental services companies — makes it structurally ambiguous: it could be a proprietary holding company, a private equity-backed roll-up, or a publicly listed entity that has since been taken private.

Historical acquisitions by Montrose Environmental Group included companies specializing in air quality measurement, emissions testing, water and wastewater treatment, environmental remediation, and regulatory compliance consulting. Post-rebrand, it is unclear whether the Onterris platform retains all of these business lines or has divested portions.

No named executives or investment committee members have been disclosed on the current web presence. The legacy Montrose leadership team is not listed, and no LinkedIn profile has been linked to the reorganized entity, making the current governance structure unknown.

The legacy Montrose operated across the United States. The ‘global’ descriptor in Onterris’s marketing suggests international expansion, but specific country offices or non-US project sites have not been confirmed.