MKSI Stock: Insider Activity, Filings & Research

MKS Inc. (MKSI) — Drillr’s hub for MKSI insider activity, SEC filings, earnings signals and AI research. Over the trailing 3 months, MKSI insiders filed 0 open-market buys and 20 sales (SEC Form 4).

Sentiment

0/100

Buys (3m)

Sells (3m)

Net (3m)

-$20.7M

Insider trades by month Buys Sells

Oct

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Jun

Context3-month price +42.5%Institutions accumulating (13F)

Date	Insider	Type	Shares	Price
Jun 2, 2026	Henry David Philipofficer: EVP, Global Str Mktg & GM, MSD	Sell	6,000	$314.43
Jun 2, 2026	Mora Elizabethdirector	Sell	300	$318.02
May 28, 2026	Donahue Joseph Bdirector	Sell	2,100	$327.95
May 28, 2026	COLELLA GERALD Gdirector	Sell	1,626	$336.54
May 28, 2026	COLELLA GERALD Gdirector	Sell	464	$330.38
May 28, 2026	COLELLA GERALD Gdirector	Sell	2,800	$338.58
May 28, 2026	COLELLA GERALD Gdirector	Sell	8,210	$331.45
May 28, 2026	COLELLA GERALD Gdirector	Sell	213	$337.05
May 28, 2026	COLELLA GERALD Gdirector	Sell	4,876	$332.04
May 28, 2026	COLELLA GERALD Gdirector	Sell	1,811	$335.46
May 27, 2026	Henry David Philipofficer: EVP, Global Str Mktg & GM, MSD	Sell	2,500	$330.50
May 26, 2026	Lee John Tseng-Chungdirector, officer: President & CEO	Sell	10,000	$315.48
May 26, 2026	Mayampurath Ramakumarofficer: EVP & CFO	Sell	8,810	$315.48
May 19, 2026	CANNONE PETER IIIdirector	Sell	1,350	$303.40
May 15, 2026	Moloney Jacqueline Fdirector	Sell	1,000	$312.20

Source: MKSI SEC Form 4 filings, latest Jun 2, 2026. For informational purposes only — not investment advice.

Overview

MKS Instruments, Inc. (NASDAQ:MKSI) is a Massachusetts-based technology company founded in 1961 that designs and manufactures precision instruments, systems, and process control solutions for advanced manufacturing processes. The company has evolved from its origins as a maker of vacuum measurement instruments into a diversified technology solutions provider serving critical industries including semiconductor manufacturing, electronics packaging, and specialty industrial applications. Through strategic acquisitions, most notably the $5.1 billion purchase of Atotech in 2022, MKS has expanded its portfolio to include chemistry solutions and has positioned itself as a key enabler of advanced manufacturing technologies across multiple high-tech sectors.

Business

MKS Instruments operates in three primary business segments that provide essential tools and materials for advanced manufacturing processes. The company's solutions are critical to the production of semiconductors, electronic devices, and various industrial applications. The Semiconductor segment represents approximately 41% of total revenue and provides instruments and systems that measure, control, and deliver critical parameters during chip manufacturing. This includes pressure and vacuum control solutions that maintain the ultra-clean environments required for semiconductor fabrication, power delivery systems that provide precise energy for etching and deposition processes, and photonics products used in lithography and metrology applications. These tools are essential for creating the microscopic features on computer chips and ensuring manufacturing quality. The Electronics & Packaging segment accounts for about 25% of revenue and focuses on the manufacturing of printed circuit boards (PCBs) and advanced packaging solutions. This segment includes laser-based drilling systems for creating tiny holes in flexible circuit boards, chemistry solutions for plating and surface treatment processes, and equipment for manufacturing the complex multi-layer substrates that connect modern electronic components. With the rise of artificial intelligence applications, this segment has seen increased demand for advanced packaging solutions that enable high-performance computing. The Specialty Industrial segment comprises approximately 34% of revenue and serves diverse markets including automotive, life sciences, research institutions, and defense applications. This segment provides laser systems, motion control equipment, optical components, and various analytical instruments. The products range from precision measurement tools used in research laboratories to industrial laser systems used in manufacturing processes across multiple industries.

Revenue model

MKS Instruments generates revenue through multiple business models across its three segments. The company primarily makes money through direct product sales of sophisticated manufacturing equipment and instruments, with typical selling prices ranging from thousands to millions of dollars per system. Additionally, the company has built a significant recurring revenue stream through consumables, spare parts, and service contracts. The 2022 acquisition of Atotech significantly enhanced the company's recurring revenue profile by adding chemistry solutions - specialized chemical formulations that customers must regularly repurchase for their manufacturing processes. These consumables now represent approximately 40% of total company revenue, providing more predictable cash flows compared to the cyclical nature of capital equipment sales. Service revenue from maintenance contracts, training, and technical support also contributes meaningfully to the business model. The company's customers are primarily large manufacturers in technology-intensive industries. Semiconductor foundries and device manufacturers represent the largest customer base, followed by electronics manufacturers producing everything from smartphones to automotive components. The customer concentration is relatively high, with major semiconductor companies and contract manufacturers representing significant portions of revenue. Several factors influence the company's margins and profitability. Semiconductor industry cycles create significant volatility, as customers adjust capital spending based on demand forecasts and inventory levels. Geopolitical tensions and export restrictions, particularly regarding China, can impact both revenue and operational complexity. Supply chain constraints for critical components can limit production and increase costs. Conversely, the company benefits from technological advancement trends such as artificial intelligence, 5G communications, and electric vehicles, which drive demand for more sophisticated manufacturing equipment and processes. The company's proprietary technology and specialized expertise also provide pricing power in many product categories.

Competitive moat

MKS Instruments possesses a moderate but meaningful competitive moat built on several key factors. The company's primary competitive advantage lies in its technical expertise and specialized knowledge accumulated over six decades of serving demanding manufacturing processes. Many of the company's products require deep understanding of physics, chemistry, and engineering principles that take years to develop and are difficult to replicate. The company benefits from high switching costs in many of its markets. Once customers integrate MKS instruments into their manufacturing processes, changing suppliers often requires extensive requalification, process adjustments, and potential production disruptions. This is particularly true in semiconductor manufacturing, where even minor changes can affect yield rates and product quality. The consumables business from Atotech further strengthens this dynamic, as customers become dependent on specific chemical formulations. Economies of scale provide another layer of protection. The company's broad product portfolio allows it to spread R&D costs across multiple product lines and leverage relationships with major customers across different segments. The global service network and technical support infrastructure also represent significant barriers to entry for smaller competitors. However, the moat faces several challenges. Cyclical end markets create periods of intense pricing pressure when demand weakens. Large, well-funded competitors including Applied Materials, Lam Research, and KLA Corporation compete in overlapping markets and have substantial resources for R&D and customer acquisition. Technological disruption remains a constant threat, as new manufacturing techniques or materials could potentially obsolete existing product lines. The company's high debt levels following the Atotech acquisition also limit financial flexibility compared to some competitors.

Risks & safety

MKS Instruments presents a mixed margin of safety profile with both strengths and concerns for investors. **Debt and Solvency Considerations:** - Total debt of approximately $4.9 billion with net leverage ratio of 4.5x EBITDA - Strong liquidity position with $714 million in cash and available credit facilities - Positive free cash flow of $410 million in 2024, demonstrating debt service capability - Management actively reducing debt with $426 million in voluntary prepayments during 2024 **Valuation Metrics:** - Trading at P/E ratio of 26.0x based on recent earnings - EV/EBITDA of 11.3x, reasonable for a technology company - Price-to-book ratio of 2.3x reflects premium to tangible assets - Graham number suggests potential undervaluation relative to conservative metrics **Other Considerations:** - Current ratio of 3.1x indicates strong short-term liquidity - Cyclical nature of semiconductor industry creates earnings volatility - Geopolitical risks from China exposure and export restrictions - Integration risks from large Atotech acquisition still being realized

Recent development

Over the past few years, MKS Instruments has undergone significant strategic transformation centered around the landmark acquisition of Atotech in August 2022 for $5.1 billion. This acquisition fundamentally changed the company's business model by adding chemistry solutions and significantly increasing the recurring revenue portion of the business to approximately 40% of total revenue. The company has focused heavily on debt reduction following the Atotech acquisition, making voluntary debt prepayments totaling $426 million in 2024 alone and reducing annual interest expense by over $130 million. Management has prioritized deleveraging as a key strategic initiative, using excess free cash flow to reduce the net leverage ratio from peak levels. In terms of market positioning, MKS has been investing in advanced packaging solutions to capitalize on artificial intelligence and high-performance computing trends. The company has achieved design wins in lithography, metrology, and inspection markets, and has seen growing demand for its chemistry solutions in advanced PCB manufacturing for AI server applications. The Electronics & Packaging segment has shown particular strength in flexible PCB drilling equipment and chemistry solutions for multi-layer circuit boards. The company has also been expanding its photonics capabilities and has achieved strategic wins in semiconductor applications. Recent investments include a new semiconductor factory in Malaysia and continued R&D spending to maintain technology leadership. Management has emphasized the importance of maintaining market share positioning during the current industry downturn to capitalize on the eventual recovery. Operational improvements have included achieving early revenue synergies from the Atotech integration, introducing new sustainable chemistry solutions, and expanding the global service network. The company has also successfully navigated supply chain challenges and export restrictions while maintaining strong customer relationships across its key markets.

MKSI company profile · for informational purposes only — not investment advice.

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