---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-017248"
form_type: "8-K"
ticker: "MKSI"
cik: "0001049502"
company_name: "MKS INC"
filed_at: "2023-05-03T23:59:59+00:00"
generated_at: "2026-06-16T00:03:07.215489+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# MKS Instruments Q1 GAAP net loss $0.64/shr; revenue $794M; ransomware ops restored

## Summary
- Revenue $794M for Q1 2023; GAAP net loss per diluted share $0.64.
- Non-GAAP net earnings per diluted share $0.48.
- Global operations restored after Feb ransomware incident; on track to recover revenue by Q2 end.
- Q2 outlook: revenue ~$980M (±$50M), non-GAAP EPS $1.13 (±$0.29).
- Operating cash flow $37M; free cash flow $20M despite incident.

## SEC filing metadata
- accession: 0000950170-23-017248
- form_type: 8-K
- ticker: MKSI
- cik: 0001049502
- company_name: MKS INC
- filed_at: 2023-05-03T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1049502/000095017023017248/0000950170-23-017248-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1049502/000095017023017248/mksi-20230503.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-017248
- JSON: https://secwatch.observer/filing/0000950170-23-017248.json
- Plain text: https://secwatch.observer/filing/0000950170-23-017248.txt

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