---
schema_version: "secwatch.filing_event.v1"
accession: "0000920371-23-000173"
form_type: "8-K"
ticker: "SSD"
cik: "0000920371"
company_name: "Simpson Manufacturing Co., Inc."
filed_at: "2023-10-19T23:59:59+00:00"
generated_at: "2026-06-09T21:33:59.475979+00:00"
event_type: "cyber"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Simpson Manufacturing discloses cybersecurity incident disrupting operations for ~3 days

## Summary
- Unauthorized activity detected on IT systems on Oct 10, 2023; systems taken offline to contain.
- Engaged third-party cybersecurity experts and notified law enforcement; incident contained.
- Business operations disrupted for approximately three days; full scope of costs not yet determined.
- Company does not expect the incident to have a material effect on financial condition.
- Investigation into the incident remains ongoing.

## SEC filing metadata
- accession: 0000920371-23-000173
- form_type: 8-K
- ticker: SSD
- cik: 0000920371
- company_name: Simpson Manufacturing Co., Inc.
- filed_at: 2023-10-19T23:59:59+00:00
- event_type: cyber
- sentiment: negative
- 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/920371/000092037123000173/0000920371-23-000173-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/920371/000092037123000173/ssd-20231019.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000920371-23-000173
- JSON: https://secwatch.observer/filing/0000920371-23-000173.json
- Plain text: https://secwatch.observer/filing/0000920371-23-000173.txt

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