---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-208903"
form_type: "8-K"
ticker: "ONT"
cik: "0001643615"
company_name: "Onterris, Inc."
filed_at: "2026-05-06T23:59:59+00:00"
generated_at: "2026-05-14T22:45:56.862416+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Onterris Q1 rev $168.5M (-5.2% YoY); Adj EBITDA $17.8M; FY guidance reaffirmed

## Summary
- Net loss improved to $12.7M ($0.35 LPS) from $19.4M ($0.64) a year ago.
- Adjusted Net Income was $4.6M ($0.12 Adj EPS) vs $5.8M ($0.07).
- Consulting & Treatment segment rev $114.6M, Measurement & Analysis $53.9M.
- FY 2026 guidance unchanged: rev $840-900M, Adj EBITDA $125-130M, ~15% margin.
- Rebranded from Montrose to Onterris on April 17; segments realigned.

## SEC filing metadata
- accession: 0001193125-26-208903
- form_type: 8-K
- ticker: ONT
- cik: 0001643615
- company_name: Onterris, Inc.
- filed_at: 2026-05-06T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1643615/000119312526208903/0001193125-26-208903-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1643615/000119312526208903/ont-20260506.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-208903
- JSON: https://secwatch.observer/filing/0001193125-26-208903.json
- Plain text: https://secwatch.observer/filing/0001193125-26-208903.txt

## Source-grounded claims
- claim_id: ba21480a35b7b85b4d8519240dfd0eb3b177a1b6
  claim: Onterris, Inc. reported the fiscal quarter ended March 31, 2026 results: revenue $168.5 million, net income $12.7 million, EPS $0.35. Guidance reaffirmed.
  evidence_excerpt: First Quarter 2026 Highlights (comparisons to first quarter 2025) • Revenue of $168.5 million, a $9.3 million decrease primarily due to lower emergency response revenue • Net loss and net loss per diluted share attributable to common stockholders (LPS) improved to $12.7 million and $0.35, respectively
  evidence_url: https://www.sec.gov/Archives/edgar/data/1643615/000119312526208903/0001193125-26-208903-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.