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AXT, Inc. designs, develops, manufactures, and distributes compound and single element semiconductor substrates. The company offers indium phosphide for use in data center connectivity using light/lasers, high-speed data transfer in data centers, 5G communications, fiber optic lasers and detectors, consumer devices, passive optical networks, silicon photonics, photonic integrated circuits, thermo-photovoltaics, RF amplifier and switching, infrared light-emitting diode (LEDS) motion control, lidar for robotics and autonomous vehicles, and infrared thermal imaging. It also provides semi-insulating gallium arsenide (GaAs) substrates for use in Wi-Fi and IoT devices, transistors, direct broadcast television, power amplifiers, satellite communications, and solar cells; and semi-conducting GaAs substrates that are used in LEDs, screen displays using micro-LEDs, printer head lasers and LEDs, 3-D sensing using VCSELs, data center communication using VCSELs, sensors for industrial robotics/near-infrared sensors, optical couplers, solar cells, night vision goggles, lidar for robotics and autonomous vehicles, and other lasers, as well as laser machining, cutting, and drilling. In addition, the company offers germanium substrates for use in multi-junction solar cells for satellites, optical sensors and detectors, terrestrial concentrated photo voltaic cells, infrared detectors, and carrier wafer for LED. Further, it provides 6N+ and 7N+ purified gallium, boron trioxide, gallium-magnesium alloy, pyrolytic boron nitride (pBN) crucibles, and pBN insulating parts. It sells its products through direct salesforce in the United States, China, and Europe, as well as through independent sales representatives and distributors in Japan, Taiwan, Korea, and internationally. The company was formerly known as American Xtal Technology, Inc. and changed its name to AXT, Inc. in July 2000. AXT, Inc. was incorporated in 1986 and is headquartered in Fremont, California.

Kopin Corporation, together with its subsidiaries, invents, develops, manufactures, and sells microdisplays, subassemblies, and related components for defense, enterprise, industrial, and consumer products in the United States, the Asia-Pacific, Europe, and internationally. It offers miniature active-matrix liquid crystal displays, liquid crystal on silicon displays/spatial light modulators, organic light emitting diode displays, microLED display technologies, application specific integrated circuits, backlights, and optical lenses; and head-mounted and hand-held VR products. The company's products are used for soldier thermal weapon rifle sights, avionic fixed and rotary wing pilot helmets, armored vehicle targeting systems, and training and simulation headsets; industrial and medical headsets; 3D optical inspection systems; and consumer augmented reality and virtual reality wearable headsets systems. Kopin Corporation was incorporated in 1984 and is headquartered in Westborough, Massachusetts.

NVE Corporation develops and sells devices that use spintronics, a nanotechnology that relies on electron spin to acquire, store, and transmit information in the United States and internationally. The company manufactures spintronic products, including sensors and couplers for use in acquiring and transmitting data. Its products comprise standard sensors to detect the presence of a magnetic or metallic material to determine position, rotation, or speed for the factory automation market; and custom and medical sensors for medical devices to replace electromechanical magnetic switches. The company also offers spintronic couplers for power conversion and industrial Internet of Things (IIoT) market; and DC-to-DC convertors for use in power conversion systems and industrial networks for the IIoT. In addition, it undertakes contracts for research and development, and licensing of spintronic magnetoresistive random access memory technology. NVE Corporation was founded in 1989 and is headquartered in Eden Prairie, Minnesota.

Emeren Group Ltd, through its subsidiaries, develops, builds, operates, and sells solar power projects. It owns and operates 3 gigawatt pipeline of projects and independent power producer assets. The company also develops community solar gardens; and sells project rights. In addition, it engages in engineering design; procurement of solar modules; balance-of-system components and other components; and construction contracting and management services. Further, the company generates and sells electricity. It operates in China, United States, UK, Spain, France, Poland, Italy, Hungary, and Internationally. The company was formerly known as ReneSola Ltd and changed its name to Emeren Group Ltd in January 2023. Emeren Group Ltd was founded in 2005 and is headquartered in Stamford, Connecticut.

Transphorm, Inc., a semiconductor company, develops, manufactures, and sells gallium nitride (GaN) semiconductor components for high voltage power conversion applications in Mainland China, Hong Kong, Taiwan, the United States, Japan, South Korea, India, and Europe. The company's products include GaN field effect transistors in various packages. Its GaN devices allows customers to design power systems creating functional value in various end products, including smartphone power adapters/fast-chargers, power supplies for datacenter servers/communication, industrial power converters, chargers/converters/inverters for electric vehicles, and other applications. The company offers its products through regional distributors and sales representatives. Transphorm, Inc. was founded in 2007 and is headquartered in Goleta, California.