By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
Insider activity at Mks Inc has been all selling for a year now: about $43.5 million from 13 sellers, and zero buyers in open-market trades.
That's worth context: executives sell for plenty of routine reasons, from scheduled trading plans to tax bills. Buying is the rarer, more telling signal.
Big money check: 773 institutions held MKSI as of Q2 2026, and more funds bought than sold. 7 quarters in a row of net selling by insiders. Insiders bought in 0 of the last 7 full quarters. MKSI also shows up in congressional disclosures: 4 reported trades from one lawmaker in two years.
Are insiders buying or selling MKSI stock?
In the last 12 months Mks Inc insiders made open-market purchases worth about $0 and sales worth about $43.5 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in MKSI?
The most recent open-market insider trade in MKSI was filed on 2026-09-02.
How many institutions own MKSI?
773 investment managers reported holding MKSI in SEC Form 13F filings for Q2 2026.
Has any member of Congress traded MKSI?
Yes. Members of Congress reported 4 trades in MKSI over the past two years. The full list is free on CapitalSnitch.
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Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).