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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.

EMCORE Corporation, together with its subsidiaries, designs and manufactures fiber optic gyro, ring laser gyro, and micro electromechanical system-based inertial sensors and systems in the United States and internationally. It offers navigation system and inertial sensing products, such as gyroscopes and multi-axis sensors, inertial measurement units, fiber optic gyroscopes, quartz micro electromechanical systems, inertial navigation systems, tactical navigation, and naval and amphibious navigation, as well as radar positioning and pointing systems, and battlefield/artillery survey systems. The company sells its products through direct sales force, application engineers, third-party sales representatives, and distributors. EMCORE Corporation was founded in 1984 and is headquartered in Alhambra, California.

Everspin Technologies, Inc. engages in the manufacture and sale of magnetoresistive random access memory (MRAM) products in the United States, Japan, Hong Kong, Germany, Singapore, China, Canada, and internationally. It offers Toggle MRAM, spin-transfer torque MRAM, and tunnel magneto resistance sensor products, as well as foundry services for MRAM products. The company provides its products for applications, including industrial, medical, automotive/transportation, aerospace, and data center markets. It serves original equipment manufacturers, contract manufacturers, and original design manufacturers through a direct sales channel, and a network of representatives and distributors. Everspin Technologies, Inc. was incorporated in 2008 and is headquartered in Chandler, Arizona.

POET Technologies, Inc. engages in the designing, developing, manufacturing and sale of opto-electronic solutions for the sensing, data communications and telecommunications markets. It developed POET Optical Interposer platform, which allows the integration of electronic and photonic devices into a single multi-chip module. The company was founded on November 14, 1985 and is headquartered in Toronto, Canada.

Resonant Inc., a late-stage development company, designs and develops filters for radio frequency (RF) and front-ends used in the mobile device, automotive, medical, Internet-of-Things, and related industries in Japan, China, and internationally. It uses WaveX, a software platform to configure and connect resonators that are building blocks of RF filters. The company develops a series of single-band designs for frequency bands; multiplexer filter designs for two or more bands to address the carrier aggregation requirements; and XBAR, a technology for mobile and non-mobile applications, including 5G, WiFi, and Ultra-WideBand applications. Resonant Inc. was incorporated in 2012 and is headquartered in Austin, Texas.