---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-269480"
form_type: "8-K"
ticker: "MKSI"
cik: "0001049502"
company_name: "MKS INC"
filed_at: "2024-12-03T23:59:59+00:00"
generated_at: "2026-05-29T09:26:19.774397+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# MKS Instruments Board adopts bylaw amendments to declassify board by 2028

## Summary
- Board declassification phased over three years starting at 2026 annual meeting, fully annual elections by 2028.
- Enhanced disclosure and procedural requirements for stockholder nominations and proposals under universal proxy rules.
- Other administrative, technical, and clarifying changes incorporated; bylaws effective December 2, 2024.

## SEC filing metadata
- accession: 0001193125-24-269480
- form_type: 8-K
- ticker: MKSI
- cik: 0001049502
- company_name: MKS INC
- filed_at: 2024-12-03T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1049502/000119312524269480/0001193125-24-269480-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1049502/000119312524269480/d873180d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-269480
- JSON: https://secwatch.observer/filing/0001193125-24-269480.json
- Plain text: https://secwatch.observer/filing/0001193125-24-269480.txt

## Key facts
- Governance Changes
  MKS INC: Amended and restated bylaws to declassify the Board and enhance stockholder nomination procedures (effective 2024-12-02).
  - Change: bylaw amendment
  - Effective: 2024-12-02
  source text: On December 2, 2024, the Board of Directors (the “Board”) of MKS Instruments, Inc. (the “Company”) approved and adopted the Second Amended and Restated By-Laws of the Company (the “Second Amended and Restated By-Laws”), effective as of the same date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1049502/000119312524269480/0001193125-24-269480-index.htm

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