MKS Instruments, Inc.
MKS Instruments, Inc. is a Public Limited Company registered in United States, and its current status with Massachusetts Secretary of the Commonwealth is active. Its registered address on file is Andover, United States. 5 shareholders are on record for MKS Instruments, Inc., and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from Massachusetts Secretary of the Commonwealth and was last updated on 29 September 2026.
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Shareholders
5
Five shareholders are currently on record for MKS Instruments, Inc., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing.
The largest of these is Blackrock Inc., holding 13.1% — the largest recorded stake — followed by FMR, LLC at 7.7%; the remaining 3 shareholders shown hold smaller stakes.
The register reports 20 shareholders in total, though only the top 5 by holding are shown in this view.
Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| Blackrock Inc. | 13.1% | Massachusetts Secretary of the Commonwealth | |
| FMR, LLC | 7.7% | Massachusetts Secretary of the Commonwealth | |
| Victory Capital Management Inc. | 5.7% | Massachusetts Secretary of the Commonwealth | |
| Invesco Ltd. | 4.1% | Massachusetts Secretary of the Commonwealth | |
| Fidelity Puritan Trust-Fidelity Low-Priced Stock Fund | 2.4% | Massachusetts Secretary of the Commonwealth |
Officers
5
The Evp, Cfo & Treasurer of MKS Instruments, Inc. currently on record is Ramakumar MAYAMPURATH; five officers are currently on record for MKS Instruments, Inc., filed with Massachusetts Secretary of the Commonwealth.
The register reports 12 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at MKS Instruments, Inc. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
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Frequently Asked Questions
Who owns MKS Instruments, Inc.?
Five shareholders are currently on record for MKS Instruments, Inc., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is Blackrock Inc., holding 13.1% — the largest recorded stake — followed by FMR, LLC at 7.7%; the remaining 3 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is MKS Instruments, Inc.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for MKS Instruments, Inc. is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does MKS Instruments, Inc. have on record?
5 shareholders are shown on record for MKS Instruments, Inc.. The register reports 20 in total; only the top 5 by holding are shown here.
Is MKS Instruments, Inc. still an active company?
MKS Instruments, Inc.'s status on Massachusetts Secretary of the Commonwealth is listed as active.
What is MKS Instruments, Inc.'s registered address?
The registered address on file for MKS Instruments, Inc. is Andover, United States.
What legal structure is MKS Instruments, Inc. registered as?
MKS Instruments, Inc. is registered as a Public Limited Company in United States.
Who are the officers/directors of MKS Instruments, Inc.?
The Evp, Cfo & Treasurer of MKS Instruments, Inc. currently on record is Ramakumar MAYAMPURATH; five officers are currently on record for MKS Instruments, Inc., filed with Massachusetts Secretary of the Commonwealth. Management authority at MKS Instruments, Inc. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Can Zavia monitor changes to MKS Instruments, Inc.'s ownership over time?
This profile reflects a point-in-time snapshot from Massachusetts Secretary of the Commonwealth. Zavia's monitoring API can track changes to MKS Instruments, Inc.'s registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access MKS Instruments, Inc.'s data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United States, so records like MKS Instruments, Inc.'s registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from Massachusetts Secretary of the Commonwealth and was last synced on 29 September 2026.