Is MKS Inc an American company?
Yes — MKS Inc is an American company.
MKS Inc is incorporated in Massachusetts, United States and headquartered in Andover, Massachusetts. Its legal-entity record reports no foreign parent — the company is independently American-owned.
The evidence
- Legal name
- MKS INC
- Incorporated in
- Massachusetts, United States
- Registered office
- BOSTON, the United States
- Headquarters
- Andover, Massachusetts, United States
- Ultimate owner
- None reported (independent)
- Stock listing
- NASDAQ: MKSI on NASDAQ
- LEI
- 549300KEQATBHAGVF505
- Founded
- 1984
Source: GLEIF, the global Legal Entity Identifier registry · checked Jul 26, 2026. A US headquarters or stock listing does not always mean US incorporation — this page reports what the legal-entity registry actually records.
MKS Inc: origin questions
Is MKS Inc an American company?
Yes — MKS Inc is an American company. MKS Inc is incorporated in Massachusetts, United States and headquartered in Andover, Massachusetts. Its legal-entity record reports no foreign parent — the company is independently American-owned.
Where is MKS Inc incorporated?
MKS Inc is legally incorporated in Massachusetts, United States, according to its GLEIF legal-entity record.
Who owns MKS Inc?
MKS Inc reports no parent company in its legal-entity record — it is independently owned rather than a subsidiary.
Is MKS Inc traded on a US stock exchange?
Yes — MKS Inc trades under the ticker MKSI on the NASDAQ.
See the full MKS Inc company profile — financials, stock data and trust credentials — or browse the directory of American companies.