Notice of Proposed Sale · 144
MKS Inc.
MKSINASDAQEQUITYCurrent
Notice of Proposed Sale
Structured filing — 144
primary_doc.xml
Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.
Proposed-sale notice
- Issuer
- MKS INC
- Issuer CIK
- 0001049502
- SEC file number
- 000-23621
- Phone
- 978-645-5500
- Person for whose account securities are to be sold
- Mora Elizabeth
- Relationships to issuer
- Director
- Street
- 2 TECH DRIVE
- City
- ANDOVER
- State / country code
- MA
- Postal code
- 01810
Securities proposed for sale
| Security | Proposed units | Aggregate market value | Units outstanding | Approximate sale date | Exchange | Broker / market maker |
|---|---|---|---|---|---|---|
| Common | 300 | 75,288.00 | 67,617,558 | 09/01/2026 | NASDAQ | Fidelity Brokerage Services LLC |
Broker / market maker — proposed row 1, entry 1
- Name
- Fidelity Brokerage Services LLC
- Street
- 900 Salem Street
- City
- Smithfield
- State / country code
- RI
- Postal code
- 02917
Acquisition of securities to be sold
| Security | Acquired | Nature of acquisition | Acquired from | Amount acquired | Gift transaction | Payment date | Nature of payment |
|---|---|---|---|---|---|---|---|
| Common | 05/11/2026 | Restricted Stock Vesting | Issuer | 300 | N | 05/11/2026 | Compensation |
Sales reported in the preceding three months
| Seller | Security | Sale date | Amount sold | Gross proceeds |
|---|---|---|---|---|
| Elizabeth A. Mora | Common | 06/01/2026 | 300 | 95,406.00 |
Seller — prior-sale row 1, entry 1
- Name
- Elizabeth A. Mora
- Street
- 2 Tech Drive
- City
- Andover
- State / country code
- MA
- Postal code
- 01810
Prior-sale reporting
- Nothing to report for the preceding three months
- N
Notice signature
- Notice date
- 09/01/2026
- Signed
- /s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Elizabeth A. Mora
- Plan adoption dates
- 02/23/2026
Company context
MKS Inc. (NASDAQ: MKSI) enables technologies that transform our world. We deliver foundational technology solutions to leading edge semiconductor manufacturing, electronics and packaging, and specialty industrial applications. We apply our broad science and engineering capabilities to create instruments, subsystems, systems, process control solutions and specialty chemicals technology that improve process performance, optimize productivity and enable unique innovations for many of the world’s leading technology and industrial companies. Our solutions are critical to addressing the challenges of miniaturization and complexity in advanced device manufacturing by enabling increased power, speed, feature enhancement, and optimized connectivity. Our solutions are also critical to addressing ever-increasing performance requirements across a wide array of specialty industrial applications. Additional information can be found at www.mks.com.