MKS Inc. General Counsel Plans June 2026 Retirement

MKS Inc. reported that Executive Vice President, General Counsel and Secretary Kathleen F. Burke plans to retire from her officer roles effective June 1, 2026.

Rhea-AI Filing Summary

MKS Inc. reported that Executive Vice President, General Counsel and Secretary Kathleen F. Burke plans to retire from her officer roles effective June 1, 2026. She notified the company on March 31, 2026 and will continue as a special advisor until July 1, 2026 to support the transition.

8-K Event Classification

Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers

1 item

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers Governance

Key personnel changes including departures, elections, or appointments of directors and executive officers.

Key Figures

Retirement effective date: June 1, 2026 Advisor role end date: July 1, 2026 Retirement notice date: March 31, 2026

3 metrics

Retirement effective date June 1, 2026 Date Kathleen F. Burke retires as EVP, General Counsel and Secretary

Advisor role end date July 1, 2026 Date through which she remains as special advisor

Retirement notice date March 31, 2026 Date she notified MKS Inc. of intent to retire

Key Terms

Emerging growth company, Nasdaq Global Select Market, Executive Vice President, General Counsel and Secretary, Section 12(b) of the Act

4 terms

Emerging growth company regulatory

"Emerging growth company Item 5.02 Departure of Directors or Certain Officers"

An emerging growth company is a recently public or smaller public firm that qualifies for temporary, lighter regulatory and disclosure rules to reduce the cost and effort of being public. For investors, it means the company may provide less historical financial detail and face fewer reporting requirements than larger firms, so it can grow more quickly but also carries higher uncertainty—like buying a promising early-stage product with fewer user reviews.

Nasdaq Global Select Market market

"Common Stock, no par value | | MKSI | | Nasdaq Global Select Market"

A Nasdaq Global Select Market listing is the highest tier of stocks on the Nasdaq exchange, reserved for companies that meet the strictest financial, reporting and governance standards. For investors, it acts like a premium quality label—signaling larger, more transparent and better-governed companies that tend to offer greater liquidity and lower perceived risk compared with lower-tier listings, making it easier to buy, sell and evaluate shares.

Executive Vice President, General Counsel and Secretary financial

"her intent to retire as Executive Vice President, General Counsel and Secretary of the Corporation"

Section 12(b) of the Act regulatory

"Securities registered pursuant to Section 12(b) of the Act"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What executive leadership change did MKS Inc. (MKSI) announce?

MKS Inc. announced that Kathleen F. Burke will retire as Executive Vice President, General Counsel and Secretary. Her retirement from these officer roles is effective June 1, 2026, marking a planned leadership transition in the company’s top legal and corporate governance position.

When will Kathleen F. Burke’s retirement at MKS Inc. (MKSI) become effective?

Her retirement as Executive Vice President, General Counsel and Secretary will become effective on June 1, 2026. This date marks her departure from those officer roles, although she will remain briefly with the company in a different capacity to assist with transition.

Will Kathleen F. Burke remain involved with MKS Inc. (MKSI) after June 1, 2026?

Yes. After retiring from her officer roles on June 1, 2026, Kathleen F. Burke will stay on as a special advisor. She will serve in this advisory role until July 1, 2026, providing short-term transition support to MKS Inc.

When did Kathleen F. Burke notify MKS Inc. (MKSI) of her intent to retire?

She notified MKS Inc. of her intent to retire on March 31, 2026. This advance notice gives the company time to manage the transition before her officer roles end on June 1, 2026, and her advisory period concludes on July 1, 2026.

What position does Kathleen F. Burke hold at MKS Inc. (MKSI) before retirement?

Before retirement, Kathleen F. Burke serves as Executive Vice President, General Counsel and Secretary of MKS Inc. This combined role places her in charge of the company’s legal affairs and corporate secretary responsibilities, reflecting a senior leadership position.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/06/2026 - 08:29 AM EDT Learn about SEC filing dates

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 31, 2026

MKS INC.

(Exact name of Registrant as Specified in Its Charter)

Massachusetts			000-23621	04-2277512
(State or Other Jurisdiction of Incorporation)			(Commission File Number)	(IRS Employer Identification No.)
2 Tech Drive
Andover, Massachusetts				01810
(Address of Principal Executive Offices)				(Zip Code)

Registrant’s Telephone Number, Including Area Code: 978 645-5500

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, no par value		MKSI		Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On March 31, 2026, Kathleen F. Burke notified MKS Inc. (the “Corporation”) of her intent to retire as Executive Vice President, General Counsel and Secretary of the Corporation effective June 1, 2026. Ms. Burke will remain employed in the role of special advisor to the Corporation until July 1, 2026.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

			MKS Inc.
Date:	April 6, 2026	By:	/s/ John T.C. Lee
			Name: John T.C. Lee Title: President and Chief Executive Officer

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