Hemlock Semiconductor

Hemlock Semiconductor (HSC) is an American chemical processing company based in Hemlock, Michigan, that describes itself as one of the world's largest providers of hyper-pure polysilicon and other silicon-based products. Polysilicon is the foundational material for high-tech electronics, cell phones and solar panels, and HSC positions itself at the base of those supply chains: as the company puts it, none of those products can be manufactured without polysilicon. The company operates a large chemical processing facility in Hemlock, Michigan, and frames its mission around "connecting and energizing the world we share" through silicon technology. HSC's business spans two main end markets. In semiconductors, its hyper-pure polysilicon feeds the wafer and chip supply chain, where extremely low impurity levels are essential. In solar, its polysilicon is used to make photovoltaic cells and modules. The company states a vision of becoming the preferred supplier of silicon-enabled technologies to the low-carbon, digital world, linking its products to both decarbonization and digitalization trends. Culturally and operationally, HSC emphasizes safety, sustainability and community. Its stated values are teamwork, responsibility, excellence and customer focus, and it highlights its commitment to the Great Lakes Bay Region of Michigan, where it is a major employer and community partner. The company also promotes careers in high-tech manufacturing and runs employee networks, including a Women's Professional Network, and supports STEM outreach. HSC has celebrated its 65th anniversary, marking more than six decades of operation and innovation in silicon materials. Its leadership team is headed by Chairman and Chief Executive Officer Arabinda (AB) Ghosh, supported by executives covering operations, finance, technology, human resources, legal, supply chain, advocacy, commercial and manufacturing functions. The company remains privately held and is not listed on a public stock exchange.

Hemlock Semiconductor (HSC) is a chemical processing company located in Hemlock, Michigan, dedicated to producing polysilicon and silicon-based materials for the semiconductor and solar industries. The company has celebrated its 65th anniversary, indicating a history spanning more than six decades of operation and innovation in silicon technology. Over that period, HSC has grown into one of the world's largest providers of hyper-pure polysilicon, a material essential to the manufacture of high-tech electronics, cell phones and solar panels. HSC's development has been closely tied to the evolution of the semiconductor and photovoltaic industries. As demand for chips and solar power expanded globally, so did the need for ultra-pure polysilicon, and HSC built its position as an upstream supplier of this critical material. The company operates a large chemical processing facility in Hemlock, Michigan, where it produces hyper-pure polysilicon and other silicon-based products. Its stated vision is to become the preferred supplier of silicon-enabled technologies to the low-carbon, digital world, reflecting the dual pull of decarbonization and digitalization on its end markets. Throughout its history, HSC has emphasized safety, sustainability and community engagement, particularly in the Great Lakes Bay Region of Michigan, where it is a significant employer. The company's values—teamwork, responsibility, excellence and customer focus—are presented as the foundation of its culture. It also supports workforce development and STEM outreach, including through employee networks such as its Women's Professional Network, and has highlighted individual employees' contributions and awards. In recent years, HSC has continued to invest in its operations and leadership. The company marked its 65th anniversary with a series of celebrations and communications, and it has announced leadership transitions, including the retirement of its Senior Vice President of Manufacturing and the appointment of a new Vice President of Manufacturing. Its executive team, led by Chairman and CEO Arabinda (AB) Ghosh, covers operations, finance, technology, human resources, legal, supply chain, advocacy, commercial and manufacturing functions. HSC remains privately held and is not listed on a public stock exchange.

• 2026

  Andy Ault, SVP of Manufacturing, announces retirement; HSC appoints a new Vice President of Manufacturing.

• 2025

  HSC celebrates its 65th anniversary, marking more than six decades of silicon technology innovation.

• 1960

  Hemlock Semiconductor begins operations in Hemlock, Michigan (approximate founding year based on the company's 65th anniversary).

One of the world's largest providers of hyper-pure polysilicon, positioned as an essential upstream supplier to the semiconductor and solar industries and aiming to be the preferred supplier of silicon-enabled technologies to the low-carbon, digital world.

• Hyper-pure polysilicon

  Ultra-high-purity polysilicon used in semiconductor and solar applications.

• Silicon-based products

  Other silicon-based materials supplied to technology and energy customers.

1. 1Home - Hemlock Semiconductorhscpoly.com
2. 2Celebrating Women's History Month and HSC 65th in March - Hemlock Semiconductorhscpoly.com
3. 3Hemlock Semiconductor: Advancing technology with polysilicon - Hemlock Semiconductorhscpoly.com
4. 4Executive Leadership - Hemlock Semiconductorhscpoly.com