---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-103002"
form_type: "8-K"
ticker: "ONT"
cik: "0001643615"
company_name: "Onterris, Inc."
filed_at: "2024-04-19T23:59:59+00:00"
generated_at: "2026-06-03T16:09:42.185495+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Montrose Environmental closes public offering of 3.45M shares, net proceeds ~$121.8M

## Summary
- Underwriting agreement signed April 17 for 3,000,000 shares at $37.15 per share, with 30-day option for additional 450,000 shares.
- Underwriters exercised option in full on April 18; total shares sold 3,450,000.
- Net proceeds expected ~$121.8 million after underwriting discounts and expenses.
- Offering closed on April 22, 2024.
- Executive officers and directors subject to 60-day lock-up.

## SEC filing metadata
- accession: 0001193125-24-103002
- form_type: 8-K
- ticker: ONT
- cik: 0001643615
- company_name: Onterris, Inc.
- filed_at: 2024-04-19T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1643615/000119312524103002/0001193125-24-103002-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1643615/000119312524103002/d803571d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-103002
- JSON: https://secwatch.observer/filing/0001193125-24-103002.json
- Plain text: https://secwatch.observer/filing/0001193125-24-103002.txt

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