MKS Inc holder JPMorgan reports 2.9% stake

MKS INC (MKSI) received an amended Schedule 13G filing stating that JPMorgan Chase & Co. and its subsidiaries beneficially own 2,005,756 shares of MKS common stock, representing 2.9% of the class.

Rhea-AI Filing Summary

MKS INC (MKSI) received an amended Schedule 13G filing stating that JPMorgan Chase & Co. and its subsidiaries beneficially own 2,005,756 shares of MKS common stock, representing 2.9% of the class. JPMorgan reports primarily sole voting power and sole dispositive power over most of these shares.

Key Figures

Shares beneficially owned: 2,005,756 shares Percent of class: 2.9% Sole voting power: 1,817,051 shares +3 more

6 metrics

Shares beneficially owned 2,005,756 shares Common stock of MKS INC reported by JPMorgan Chase & Co.

Percent of class 2.9% Beneficial ownership percentage of MKS INC common stock

Sole voting power 1,817,051 shares Shares of MKS INC over which JPMorgan has sole voting power

Shared voting power 4,188 shares Shares of MKS INC over which JPMorgan has shared voting power

Sole dispositive power 2,003,316 shares Shares of MKS INC over which JPMorgan has sole dispositive power

Shared dispositive power 452 shares Shares of MKS INC over which JPMorgan has shared dispositive power

Key Terms

beneficially owned, Sole Voting Power, Shared Dispositive Power, parent holding company, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 2005756"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole Voting Power financial

"5 | Sole Voting Power 1,817,051.00 6 | Shared Voting Power 4,188.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Shared Dispositive Power financial

"7 | Sole Dispositive Power 2,003,316.00 8 | Shared Dispositive Power 452.00"

parent holding company regulatory

"If a parent holding company has filed this schedule, pursuant to (ii)(G)"

Schedule 13G regulatory

"If a parent holding company has filed this schedule, pursuant to (ii)(G)"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

FAQ

What ownership stake in MKSI does JPMorgan Chase & Co. report on this Schedule 13G/A?

JPMorgan Chase & Co. reports beneficial ownership of 2,005,756 shares of MKS INC common stock, representing 2.9% of the class as disclosed under Item 4 of the filing.

How many MKSI shares does JPMorgan Chase & Co. have sole voting power over?

JPMorgan Chase & Co. reports sole voting power over 1,817,051 shares of MKS INC common stock and shared voting power over 4,188 shares, according to the ownership breakdown in Item 4.

How many MKSI shares can JPMorgan Chase & Co. solely dispose of?

JPMorgan Chase & Co. reports sole dispositive power over 2,003,316 shares of MKS INC common stock and shared dispositive power over 452 shares, as stated in the Item 4 ownership table.

Is JPMorgan Chase & Co.’s ownership in MKSI above or below 5%?

JPMorgan Chase & Co.’s reported beneficial ownership in MKS INC is 2.9% of the class, which is 5 percent or less, as indicated in Item 5 of the filing.

Which JPMorgan subsidiaries are identified as holding MKSI shares in this Schedule 13G/A?

The filing lists several subsidiaries, including J.P. Morgan Trust Company of Delaware, J.P. Morgan Securities LLC, JPMorgan Chase Bank, National Association, and multiple JPMorgan Asset Management entities, among others.

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Available on EDGAR 09/03/2026 - 12:29 PM Accepted by SEC EDGAR 09/03/2026 - 12:29 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

MKS INC.

(Name of Issuer)

Common Stock, no par value

(Title of Class of Securities)

55306N104

(CUSIP Number)

08/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 55306N104

1

Names of Reporting Persons

JPMORGAN CHASE & CO.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,817,051.00
6	Shared Voting Power 4,188.00
7	Sole Dispositive Power 2,003,316.00
8	Shared Dispositive Power 452.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,005,756.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

2.9 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MKS INC.
(b)	Address of issuer's principal executive offices: 2 Tech Drive Andover Massachusetts 01810
Item 2.
(a)	Name of person filing: JPMORGAN CHASE & CO.
(b)	Address or principal business office or, if none, residence: 270 Park Avenue,,New York, NY 10017
(c)	Citizenship: DE
(d)	Title of class of securities: Common Stock, no par value
(e)	CUSIP No.: 55306N104
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 2005756
(b)	Percent of class: 2.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1817051
	(ii) Shared power to vote or to direct the vote: 4188
	(iii) Sole power to dispose or to direct the disposition of: 2003316
	(iv) Shared power to dispose or to direct the disposition of: 452
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. J.P. Morgan Trust Company of Delaware; J.P. Morgan Securities LLC; JPMorgan Asset Management (Asia Pacific) Limited; JPMorgan Asset Management (Singapore) Limited; JPMorgan Asset Management (UK) Limited; JPMorgan Chase Bank, National Association; J.P. Morgan Investment Management Inc.; JPMorgan Asset Management (Taiwan) Limited; JPMorgan Asset Management (Japan) Limited; 55I, LLC
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. Not Applicable
Item 9.	Notice of Dissolution of Group.
	Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5. Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

JPMORGAN CHASE & CO.

Signature:	Rachel Tsvaygoft
Name/Title:	Vice President
Date:	09/03/2026