---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-424709"
form_type: "8-K"
ticker: "MKSI"
cik: "0001049502"
company_name: "MKS INC"
filed_at: "2026-10-19T12:17:13+00:00"
generated_at: "2026-10-19T12:20:07.770305+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# MKS to sell Ophir Optics to TTM for $650M in cash; deal expected to close Q2 2027

## Summary
- Definitive agreement: MKS will sell its Ophir Optics business to TTM Technologies for $650M all cash, subject to customary closing adjustments.
- Price is over 18x projected FY 2026 Adjusted EBITDA for Ophir Optics; expected close in Q2 2027 pending regulatory approvals and governmental consents/permits.
- Ophir Optics supplies high-precision infrared thermal imaging and laser optics for defense, security and industrial customers in MKS’ Specialty Industrial market.
- Deal excludes MKS Ophir Instruments laser characterization business and does not include sale of the Ophir brand; no impact on Ophir Instruments products/services.
- J.P. Morgan is exclusive financial advisor; Herzog Fox & Neeman is lead legal advisor; CEO John T.C. Lee says deal strengthens MKS’ balance sheet.

## SEC filing metadata
- accession: 0001193125-26-424709
- form_type: 8-K
- ticker: MKSI
- cik: 0001049502
- company_name: MKS INC
- filed_at: 2026-10-19T12:17:13+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1049502/000119312526424709/0001193125-26-424709-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1049502/000119312526424709/mksi-20261019.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-424709
- JSON: https://secwatch.observer/filing/0001193125-26-424709.json
- Plain text: https://secwatch.observer/filing/0001193125-26-424709.txt

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