---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-137689"
form_type: "8-K"
ticker: "MKSI"
cik: "0001049502"
company_name: "MKS INC"
filed_at: "2024-05-14T23:59:59+00:00"
generated_at: "2026-06-02T00:11:43.583123+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# MKS Instruments prices $1.2B 1.25% convertible notes due 2030; upsized from $1.0B

## Summary
- $1.2B aggregate principal of 1.25% convertible senior notes due 2030; initial purchasers can buy additional $200M.
- Initial conversion price ~$154.32/share (30% premium over May 13 close of $118.71).
- Net proceeds ~$1.1777B; $143.5M for capped calls; remainder to repay ~$1.034B First Lien term loan.
- Entered capped call transactions with option counterparties; cap price $237.42/share.
- Offering expected to close May 16, 2024; notes unsecured, interest payable semi-annually.

## SEC filing metadata
- accession: 0001193125-24-137689
- form_type: 8-K
- ticker: MKSI
- cik: 0001049502
- company_name: MKS INC
- filed_at: 2024-05-14T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1049502/000119312524137689/0001193125-24-137689-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1049502/000119312524137689/d838048d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-137689
- JSON: https://secwatch.observer/filing/0001193125-24-137689.json
- Plain text: https://secwatch.observer/filing/0001193125-24-137689.txt

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