How big is MKS Inc.'s plan?

MKS Inc.'s plan reported $3.1M in assets and 5 participants for 2025.

Original filing (PDF)20260218154648NAL0009370146001

MKS Inc.

Name: MKS Inc. — MKS, Inc. Retirement Savings Plan, Form 5500 (2025)
Creator: MKS Inc.
License: https://www.usa.gov/government-works

Form 5500-SF

FILING_RECEIVED

MKS, Inc. Retirement Savings Plan

401(k) retirement plan · MKS Inc.'s MKS, Inc. Retirement Savings Plan held $3.1M in plan assets for 5 participants in 2025.

Signals · 1

High average account balance

Active participants

Accounts w/ balance

Plan assets (EOY)

$3.1M

Net assets (EOY)

$3.1M

People on this filing

Michael Ridgeway signed MKS Inc.'s 2025 Form 5500 as plan administrator.

Michael Ridgeway — Plan Administrator — Form 5500 signer

Get verified email & phone for these signers

Signer names are public record from the Form 5500 e-signature.

Plan identifiers

MKS Inc.'s EIN is 23-2477092.

EIN 23-2477092

Plan number 001

Plan year 2025

ACK ID 20260218154648NAL0009370146001

Official Form 5500 document

Download the official 2025 Form 5500 (PDF) for MKS Inc. from the U.S. Department of Labor's EFAST2 system.

Download the official 2025 Form 5500 (PDF)

Plan features

MKS Inc.'s plan includes profit-sharing, ERISA 404(c) participant direction, a 401(k) feature, a default investment (QDIA).

Decision-maker contacts

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Plan health score

Top-tier plan health

Directional indicator from public Form 5500 data — compliance & integrity, total plan cost, participant health and vendor stack, benchmarked against same-size peers. Not a fiduciary tool. Based on 70% of scoring inputs for this filing.

Compliance & integrity

100

Total plan cost

n/a

Plan health

Vendor & structure

100

Helping the score

Cost not scored — no comparable Schedule H expense data for this cohort.
High average account balance (93rd percentile).

Plan sponsor

Name

MKS INC

EIN

all filings

Address

478 LEXINGTON DR · KING OF PRUSSIA, PA · 194061562

Phone

(610) 989-9905

Industry

Professional & Technical Services

Plan administrator

Same as plan sponsor.

Plan characteristics

Plan number

001

Plan year

2025

Plan year begin

2025-01-01

Tax period

2025-12-31

Filed

2026-02-18

Pension benefit codes

2E · Profit-sharing

2F · ERISA section 404(c)

2G · Total participant-directed accounts

2J · 401(k) feature

2K · 401(m) arrangement

2T · Default investment account (QDIA)

3D · Pre-approved plan (master / prototype / VS)

Audit & trust (Schedule H)

Service providers (Schedule C)

Small plans don't disclose service providers

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