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This MKS Insider Reduced Their Stake By 11%

Simply Wall St·01/06/2026 11:02:40
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Looking at MKS Inc.'s (NASDAQ:MKSI ) insider transactions over the last year, we can see that insiders were net sellers. That is, there were more number of shares sold by insiders than there were purchased.

While we would never suggest that investors should base their decisions solely on what the directors of a company have been doing, logic dictates you should pay some attention to whether insiders are buying or selling shares.

The Last 12 Months Of Insider Transactions At MKS

The Chairman of the Board, Gerald Colella, made the biggest insider sale in the last 12 months. That single transaction was for US$836k worth of shares at a price of US$105 each. That means that an insider was selling shares at slightly below the current price (US$176). As a general rule we consider it to be discouraging when insiders are selling below the current price, because it suggests they were happy with a lower valuation. Please do note, however, that sellers may have a variety of reasons for selling, so we don't know for sure what they think of the stock price. We note that the biggest single sale was only 11% of Gerald Colella's holding. The only individual insider seller over the last year was Gerald Colella.

The chart below shows insider transactions (by companies and individuals) over the last year. If you want to know exactly who sold, for how much, and when, simply click on the graph below!

View our latest analysis for MKS

insider-trading-volume
NasdaqGS:MKSI Insider Trading Volume January 6th 2026

If you are like me, then you will not want to miss this free list of small cap stocks that are not only being bought by insiders but also have attractive valuations.

Insider Ownership Of MKS

Many investors like to check how much of a company is owned by insiders. A high insider ownership often makes company leadership more mindful of shareholder interests. Insiders own 0.6% of MKS shares, worth about US$70m. While this is a strong but not outstanding level of insider ownership, it's enough to indicate some alignment between management and smaller shareholders.

What Might The Insider Transactions At MKS Tell Us?

There haven't been any insider transactions in the last three months -- that doesn't mean much. Still, the insider transactions at MKS in the last 12 months are not very heartening. But we do like the fact that insiders own a fair chunk of the company. So these insider transactions can help us build a thesis about the stock, but it's also worthwhile knowing the risks facing this company. Every company has risks, and we've spotted 1 warning sign for MKS you should know about.

If you would prefer to check out another company -- one with potentially superior financials -- then do not miss this free list of interesting companies, that have HIGH return on equity and low debt.

For the purposes of this article, insiders are those individuals who report their transactions to the relevant regulatory body. We currently account for open market transactions and private dispositions of direct interests only, but not derivative transactions or indirect interests.