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MKS INC. (MKSI)

Name: MKS INC. (MKSI) — Institutional ownership, SEC filings and insider activity
Creator: Sightfile
License: https://www.sec.gov/privacy#dissemination

Institutional ownership, SEC filings and insider activity

Sector: Industry · SEC CIK 0001049502 · EDGAR filings · Updated 2026-07-24

MKS INC. (MKSI) has reported institutional ownership of 102.1%, with 614 institutional managers holding positions valued at $15.8B per the latest 13F reporting period.

Institutional ownership

102.1%

Institutional managers

614

Reported 13F value

$15.8B

Insider activity

98 trans.

−$19.7M net selling

Filings this week (1)

2026-07-24 — SCHEDULE 13G/A filed

Every filing links to the official SEC document. Real-time filing alerts for this company are available inside the app.

Latest updates

2026-07-16 — SCHEDULE 13G filed
2026-06-16 — Insider transaction reported (Form 4)
2026-06-12 — Notice of proposed sale filed (Form 144)
2026-06-11 — Insider transaction reported (Form 4)
2026-06-10 — Notice of proposed sale filed (Form 144)
2026-06-08 — Insider transaction reported (Form 4)
2026-06-05 — Notice of proposed sale filed (Form 144)
2026-06-04 — Initial insider ownership filed (Form 3)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, MKS INC. has 614 institutional holders and institutional ownership of 102.1%.

#	Institution	Reported value	% of tracked total
1	BlackRock, Inc.	$1.53B	9.7%
2	Invesco Ltd.	$855.2M	5.4%
3	VANGUARD PORTFOLIO MANAGEMENT LLC	$847.0M	5.4%
4	VANGUARD CAPITAL MANAGEMENT LLC	$692.7M	4.4%
5	STATE STREET CORP	$472.9M	3.0%
6	Capital International Investors	$452.4M	2.9%
7	FMR LLC	$444.4M	2.8%
8	JPMORGAN CHASE & CO	$441.2M	2.8%
9	WELLINGTON MANAGEMENT GROUP LLP	$421.3M	2.7%
10	PRICE T ROWE ASSOCIATES INC /MD/	$390.7M	2.5%

Full holder history and quarter-over-quarter changes are available inside the app.

Insider activity

Insiders reported 98 transactions (0 buys, 28 sells) across 15 reporting insiders, with a net reported value of −$19.7M.

Quarterly net insider value, as reported in Form 4 filings.

Fails-to-deliver

The SEC's fails-to-deliver file for 2026-06-30 reports 5,389 failed-to-deliver shares ($1.00M) for MKSI — an official data point published by the SEC, shown as reported.

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See full history, cross-references and alerts on Sightfile

Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-07-24.