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ACMR vs MKSI

ACM Research, Inc. Class A Common Stock and MKS Inc. Common Stock

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ACM Research, Inc. Class A Common Stock

ACM Research, Inc., together with its subsidiaries, develops, manufactures, and sells capital equipment worldwide. It also develops, manufactures, and sells a range of packaging tools to wafer assembly and packaging customers. The company provides Wet Cleaning Equipment for Front End Production Processes; Ultra C SAPS II and Ultra C SAPS V which are a single-wafer, serial-processing tool used to remove random defects from wafer surfaces or interconnects and barrier metals as part of the chip front-end fabrication process or for recycling test wafers; and Ultra C TEBO II and Ultra C TEBO V, a single-wafer, serial-processing tool used at numerous manufacturing processing steps for cleaning of chips at process nodes of 28nm or less. In addition, it offers Ultra-C Tahoe wafer cleaning tool that delivers high cleaning performance using significantly less sulfuric acid and hydrogen peroxide than is typically consumed by conventional high-temperature single-wafer cleaning tools; and advanced packaging tools, such as coaters, developers, photoresist strippers, scrubbers, wet etchers, and copper-plating tools. Further, the company provides e Ultra fn Furnace, a dry processing tool; Ultra Pmax" PECVD tool, for film uniformity; Ultra Track tool, a 300mm process tool that delivers air downflow, robot handling, and customizable software to address specific customer requirements; and a suite of semi-critical cleaning systems which include single wafer back side cleaning, scrubber, and auto bench cleaning tools. It markets and sells its products under the SAPS, TEBO, ULTRA C, ULTRA Fn, Ultra ECP, Ultra ECP map, and Ultra ECP ap trademarks through direct sales force and third-party representatives. ACM Research, Inc. was incorporated in 1998 and is headquartered in Fremont, California.

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MKS Inc. Common Stock

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. It operates through Vacuum Solutions Division (VSD), Photonics Solutions Division (PSD), and Material Solutions Division (MSD) segments. The 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, beam measurement and profiling, precision motion control, vibration isolation systems, photonics instruments, temperature sensing, opto-mechanical components, optical elements, systems for flexible PCB laser processing, and laser-based systems, as well as high density interconnect PCB and package manufacturing. The 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 headquartered in Andover, Massachusetts.

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