Company Announcements

LITTLE ROCK, Ark.--(BUSINESS WIRE)--Apr. 27, 2026-- Onterris, Inc. (NYSE: Montrose Environmental Group, Inc., MEG; changing to NYSE: Onterris, Inc., ONT on May 4, 2026), a global environmental solutions company solving complex challenges for planet and progress, today announced the planned dates for its first quarter fiscal year 2026 results and conference call.

On Wednesday, May 6, 2026, after the close of trading on the New York Stock Exchange, Onterris intends to release its first quarter fiscal year 2026 results.

On Thursday, May 7, 2026, at 8:30 a.m. Eastern Time, Onterris plans to host a conference call to discuss these results and the forward outlook.

A live webcast of the conference call will be available in the Investors section of the Onterris website at ir.onterris.com. Alternatively, to participate in the live call, dial +1 (800) 717-1738 (toll-free in North America) or +1 (646) 307-1865 (international) approximately ten minutes before the scheduled start. When prompted, please provide the Conference ID: 97685 to join the Onterris First Quarter 2026 Earnings Conference Call.

An archived replay of the call will be available on the Investors portion of the Onterris website for 30 days following the live call.

About Onterris

Onterris is a global environmental solutions company partnering with organizations to solve complex challenges where environmental pressures, regulatory expectations and operational risks intersect. Guided by our mission to advance the way of life without compromising the integrity of our environment, we believe environmental responsibility and human progress are fundamentally connected. Our scientists, engineers, field teams and consultants apply systems thinking that unites science, data and practical expertise to deliver solutions that strengthen our clients’ resilience, mitigate risk and help protect the air, water and soil that sustain communities, while uncovering responsible paths forward for planet and progress. For more information, visit Onterris.com.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260427497683/en/

Investor Relations
Adrianne Griffin
Senior Vice President, Investor Relations & Treasury
(949) 988-3383
ir@onterris.com

Media Relations
Lauren Dowling
Senior Vice President, Marketing & Communications
(214) 514-9809
pr@onterris.com

Source: Montrose Environmental Group, Inc.