---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-342500"
form_type: "8-K/A"
ticker: "ONT"
cik: "0001643615"
company_name: "Onterris, Inc."
filed_at: "2026-08-10T20:31:39+00:00"
generated_at: "2026-08-10T20:33:33.111230+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Onterris adopts shareholder rights plan (poison pill) with 15% trigger and $105 exercise price

## Summary
- Board declared one preferred share purchase Right per common share, payable Aug 17, 2026 to holders of record.
- Each Right buys 1/1000th of Series B Preferred at $105.00, subject to adjustment.
- Rights separate upon 15% beneficial ownership acquisition (Acquiring Person); flip-in allows 2x exercise value.
- Rights expire Aug 4, 2027; redeemable at $0.001 per Right by Board before trigger.
- Amendment No. 1 removes previously included Item 8.01 and Exhibit 99.1; other terms unchanged.

## SEC filing metadata
- accession: 0001193125-26-342500
- form_type: 8-K/A
- ticker: ONT
- cik: 0001643615
- company_name: Onterris, Inc.
- filed_at: 2026-08-10T20:31:39+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 1.01, 3.03, 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1643615/000119312526342500/0001193125-26-342500-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1643615/000119312526342500/ont-20260805.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-342500
- JSON: https://secwatch.observer/filing/0001193125-26-342500.json
- Plain text: https://secwatch.observer/filing/0001193125-26-342500.txt

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