---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-228529"
form_type: "8-K/A"
ticker: "MKSI"
cik: "0001049502"
company_name: "MKS INC"
filed_at: "2022-08-24T23:59:59+00:00"
generated_at: "2026-06-23T21:36:11.795028+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "low"
source: SEC EDGAR
---

# MKS files amendment with Atotech historical and pro forma combined financials for August 2022 acquisition

## Summary
- Amendment No. 1 to Original Form 8-K adds audited Atotech financials for 2020-2021 and unaudited interim H1 2022 financials incorporated by reference from prior SEC filings.
- Unaudited pro forma combined balance sheet as of June 30, 2022 and statements of operations for year ended Dec 31, 2021 and six months ended June 30, 2022 are provided as Exhibit 99.3.
- Pro forma financials assume the Atotech acquisition occurred on Jan 1, 2021 for income statements and on June 30, 2022 for the balance sheet.
- The original 8-K reported completion of the Atotech acquisition on August 17, 2022; this filing supplies the delayed financial information required by Item 9.01.
- No specific financial results (e.g., revenue, net income) appear in the filed text; figures are contained in incorporated reports and the pro forma exhibit.

## SEC filing metadata
- accession: 0001193125-22-228529
- form_type: 8-K/A
- ticker: MKSI
- cik: 0001049502
- company_name: MKS INC
- filed_at: 2022-08-24T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: low
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1049502/000119312522228529/0001193125-22-228529-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1049502/000119312522228529/d213587d8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-228529
- JSON: https://secwatch.observer/filing/0001193125-22-228529.json
- Plain text: https://secwatch.observer/filing/0001193125-22-228529.txt

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