Avoid the stress of overpaying for a stock or missing an opportunity by using the right tools and insights to evaluate MKS Inc. before investing.

In this article, we go over a few key elements for understanding MKS Inc.’s stock price such as:

• MKS Inc.’s current stock price and volume
• Why MKS Inc.’s stock price changed recently
• Upgrades and downgrades for MKSI from analysts
• MKSI’s stock price momentum as measured by its relative strength

About MKS Inc. (MKSI)

Before we jump into MKS Inc.’s stock price, history, target price and what caused it to recently rise, let’s take a look at some background.

MKS Inc. provides foundational technology solutions to semiconductor manufacturing, electronics and packaging, and specialty industrial applications in the United States, China, South Korea, Japan, Taiwan, Singapore, and internationally. The company operates through Vacuum Solutions Division (VSD), Photonics Solutions Division (PSD), and Material Solutions Division (MSD) segments. Its VSD segment provides foundational technology solutions, including pressure measurement and control, flow measurement and control, gas and vapor delivery, gas composition analysis, electronic control technology, reactive gas generation and delivery, power generation and delivery, and fiber optic temperature and position sensing. The PSD segment offers range of solutions, which include lasers, photonics, optics, precision motion control, and vibration control. Its MSD segment develops, process, and manufactures technologies comprising advanced surface modification, electroless and electrolytic plating, and surface finishing for chemistry, equipment, and services markets, as well as high-technology applications. In addition, the company sells its products and services through direct sales, network of independent distributors, and sales representatives, as well as websites, including product catalogs. MKS Inc. was formerly known as MKS Instruments, Inc. and changed its name to MKS Inc. in May 2025. The company was incorporated in 1961 and is based in Andover, Massachusetts.

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MKS Inc.’s Stock Price as of Market Close

As of July 31, 2026, 4:00 PM, CST, MKS Inc.’s stock price was $297.450.

MKS Inc. is up 1.41% from its previous closing price of $293.300.

During the last market session, MKS Inc.’s stock traded between $294.150 and $314.690. Currently, there are approximately 67.40 million shares outstanding for MKS Inc..

MKS Inc.’s price-earnings (P/E) ratio is currently at 61.4, which is high compared to the Semiconductors & Semiconductor Equipment industry median of 57.8. The price-earnings ratio gauges market expectation of future performance by relating a stock’s current share price to its earnings per share.

MKS Inc. Stock Price History

MKS Inc.’s (MKSI) price is currently down 33.13% so far this month.

During the month of July, MKS Inc.’s stock price has reached a high of $428.960 and a low of $256.160.

Over the last year, MKS Inc. has hit prices as high as $447.620 and as low as $88.490. Year to date, MKS Inc.’s stock is up 86.14%.

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What Caused MKS Inc. Stock’s Price to Rise?

Stock prices are primarily based on seller supply and buyer demand. But have you ever wondered about what other factors affect a stock's price?

When an analyst changes their opinion of a stock by upgrading or downgrading their rating, it often leads to a sudden stock price adjustment. As of July 30, 2026, there were 0 analysts who downgraded MKS Inc.’s stock and 1 analyst who upgraded over the last month.

Additionally, you'll want to evaluate MKS Inc.’s financial health and valuation. Investors can use AAII's Value Grade, which combines six key valuation metrics like P/E and P/S ratios for a comprehensive analysis to conduct analysis on MKS Inc.’s valuation and financial health. This approach mitigates the limitations of single-metric evaluations.

MKS Inc.’s current valuation based on AAII’s Value Grade is a F, which means it is considered to be Ultra Expensive.

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Lastly, news and media coverage as well as recent press reports about the company or its industry may cause stock prices to fluctuate. You can check out the most recent news articles about MKS Inc. (MKSI) by visiting AAII Stock Evaluator.

Relative Price Strength of MKS Inc.

Relative price strength measures a stock's performance against the market, helping investors identify stocks that are outperforming benchmarks.

For AAII’s Momentum Grade, a weighted relative price strength is calculated. Follow this link to learn more about the Momentum Grade.

As of July 30, 2026, MKS Inc. has a weighted four-quarter relative price strength of 22.75%, which translates to a Momentum Score of 93 and is considered to be Very Strong.

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MKS Inc. Stock Price: Bottom Line

As of July 31, 2026, MKS Inc.’s stock price is $297.450, which is up 1.41% from its previous closing price.

AAII advises against making stock decisions based solely on price or past returns. Instead, consider a variety of metrics, fundamentals, and analytics to evaluate a stock like MKS Inc. stock prices are influenced by market supply and demand and offer just a snapshot of a company's overall health.

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