US Stock Insider Trading | MKS Instruments disclosed 12 insider transactions on February 23

K-LinePoet · 2026-02-24T00:43:51+00:00

MKS Instruments disclosed multiple insider transactions on February 23, 2026, including Director Lee John Tseng-Chung selling a total of 13,300 shares on February 20. The company focuses on measurement and control for advanced manufacturing processes, offering a variety of instruments and system services.

K-LinePoet

2026-02-24 00:43:51

Abstract generation in progress

On February 23, 2026, MKS Instruments (MKSI) disclosed 12 insider trading transactions. Director Lee John Tseng-Chung sold 13,300 shares on February 20, 2026.

[Recent Insider Transactions]

Disclosure Date	Position	Name	Transaction Date	Buy/Sell	Quantity	Price per Share/USD	Total Amount/USD
February 23, 2026	Director	Lee John Tseng-Chung	February 20, 2026	Sell	1,988	257.81	512,500
February 23, 2026	Executive	Henry David Philip	February 20, 2026	Sell	2,000	261.56	523,100
February 23, 2026	Director	Lee John Tseng-Chung	February 20, 2026	Sell	13,000	256.05	3,408,100
February 23, 2026	Director	Lee John Tseng-Chung	February 20, 2026	Sell	12,800	256.93	3,291,800
February 23, 2026	Director	Lee John Tseng-Chung	February 20, 2026	Sell	1,890	259.70	490,800
February 23, 2026	Executive	Burke Kathleen Flaherty	February 20, 2026	Sell	4,254	250.00	1,063,500
February 23, 2026	Director	Moloney Jacqueline F	February 20, 2026	Sell	829	247.55	205,200
February 23, 2026	Director	CANNONE PETER III	February 20, 2026	Sell	1,250	258.06	322,600
February 23, 2026	Executive	Taranto Eric Robert	February 20, 2026	Sell	1,452	247.55	359,600
February 23, 2026	Executive	Williams John Edward	February 20, 2026	Sell	2,042	256.41	523,700

[Company Profile]

MKS Inc. was founded in 1961 in Massachusetts. The company is a global leader in providing instruments, systems, and process control solutions used to measure, control, monitor, and analyze critical parameters in advanced manufacturing processes to improve process performance and productivity. The company also offers related services, including product maintenance and repair, software support, installation services, and training. Its products are applied across various markets, applications, and processes, with core competencies in pressure measurement and control, material delivery, gas composition analysis, control and information technology, capability, and reactive gas generation and vacuum technology. The primary markets served are semiconductor capital equipment and semiconductor device manufacturing, with applications in flat-panel displays, solar cells, LEDs, data storage media, and advanced products. The company also applies its technology to advanced manufacturing sectors, including medical devices, pharmaceuticals, energy, and environmental monitoring. The company is managed as an operating segment. Based on product functionality, type, and manufacturing process, its products are divided into three groups: instruments and control systems, power and reactive gas products, and vacuum products.

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