Onterris guided full-year 2026 revenue to $840 million-$900 million in February and reiterated that range in May. On August 5, 2026, the Company cut it to $740 million-$790 million and shares fell approximately 18%.

A guidance reduction of roughly $105 million at the midpoint sent Onterris, Inc. (NYSE: ONT) shares down approximately 17.5% to 18% on August 5, 2026. Shareholders who lost money on ONT are encouraged to have their losses reviewed now. You may also contact Joseph E. Levi, Esq. via email at jlevi@levikorsinsky.com or by telephone at (212) 363-7500.

The February 25, 2026 guidance assumed annual environmental emergency response revenue of $50.0 million to $70.0 million. On the February 26, 2026 call, CEO Vijay Manthripragada stated that organic revenue growth of "7% to 9% remains our long-term expectation. And for 2026, we expect to be at the high end of that range." On May 6, 2026, the Company stated the "[r]evenue guidance range of $840.0 million to $900.0 million is unchanged."

Q2 2026 revenue came in at $186.7 million, down 20.4% year over year. Management attributed the shortfall primarily to unusually low emergency response and recovery activity, and also cited lower pass-through revenue and temporary regulatory waivers affecting some air-testing work. Onterris also disclosed a Board strategic review. Levi & Korsinsky is investigating potential securities law violations concerning these guidance statements.

If you purchased Onterris shares and suffered a loss, submit your ONT loss information here. You may also reach Joseph E. Levi, Esq. at jlevi@levikorsinsky.com or (212) 363-7500.

Levi & Korsinsky, LLP | Top 50 Securities Firm | (212) 363-7500 | www.zlk.com

Frequently Asked Questions About the ONT Investigation

Q: Who is eligible to participate in the ONT investigation? A: Investors who purchased ONT stock or securities and suffered financial losses may be eligible. Eligibility is based on purchase date and documented losses -- not on whether you still hold the shares.

Q: Which statements are being investigated as potentially misleading? A: The investigation concerns whether Onterris, Inc. made materially false or misleading statements regarding its full-year 2026 revenue guidance and organic growth expectations.

Q: How much did ONT stock drop? A: Shares fell approximately 18% after the Company reported Q2 revenue of $186.7 million and cut full-year revenue guidance by roughly $105 million at the midpoint. Investors who suffered losses may be eligible to seek recovery.

Q: What do ONT investors need to do right now? A: Gather brokerage records including purchase dates, share quantities, and prices paid. Contact Levi & Korsinsky for a free, no-obligation evaluation at jlevi@levikorsinsky.com or (212) 363-7500.

Q: What documents do I need to participate? A: Brokerage statements or trade confirmations showing purchase dates, share quantities, prices paid, and any subsequent sale dates and prices.

Q: What if I already sold my ONT shares -- can I still recover losses? A: Yes. Eligibility is based on when you purchased, not whether you still hold the shares. Investors who bought ONT and sold at a loss may still participate in the investigation.

Q: What does it cost me to participate? A: There is no upfront cost to participate. Securities investigations and any resulting actions are generally handled on a contingency basis -- no retainer and no out-of-pocket costs.

Q: What if I live outside the United States? A: U.S. securities fraud investigations generally cover purchases on U.S. exchanges regardless of the investor's country of residence.

Attorney Advertising. Prior results do not guarantee similar outcomes.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260814713252/en/