---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-215204"
form_type: "8-K"
ticker: "SHC"
cik: "0001822479"
company_name: "Sotera Health Co"
filed_at: "2024-09-06T23:59:59+00:00"
generated_at: "2026-05-31T06:06:31.708230+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Sotera Health insider selling: 25M shares sold at $15.03; director Donnini resigns

## Summary
- Selling stockholders sold 25M shares at $15.03/share; company received no proceeds.
- David Donnini, GTCR designee, resigned from Sotera Health board effective Sept 6, 2024, reducing board size to 11.
- Resignation was not due to any disagreement with the company, management or board.
- Underwriting agreement with Citigroup Global Markets Inc. filed as Exhibit 1.1.

## SEC filing metadata
- accession: 0001193125-24-215204
- form_type: 8-K
- ticker: SHC
- cik: 0001822479
- company_name: Sotera Health Co
- filed_at: 2024-09-06T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1822479/000119312524215204/0001193125-24-215204-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1822479/000119312524215204/d891564d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-215204
- JSON: https://secwatch.observer/filing/0001193125-24-215204.json
- Plain text: https://secwatch.observer/filing/0001193125-24-215204.txt

## Key facts
- Executive change
  David A. Donnini resigned as Director at Sotera Health Co.
  - Action: resigned
  - Role: Director
  source text: On September 6, 2024, David A. Donnini, one of GTCR’s designees, notified the Company that, consistent with this decrease, he wished to resign as a director.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1822479/000119312524215204/0001193125-24-215204-index.htm

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