AMREP, through its subsidiaries, is engaged in the real estate business. The company conducts its real estate business primarily in the City of Rio Rancho and certain adjoining areas of Sandoval County, NM. The company sells both developed and undeveloped lots to national, regional and local homebuilders, commercial and industrial property developers and others. The company also acquires land, focusing primarily in New Mexico, after completion of market research, soil tests, environmental studies and other engineering work, a review of zoning and other governmental requirements, discussions with homebuilders or other end-users of the property and financial analysis of the project and estimated development costs.

Amtech Systems is a manufacturer of capital equipment. The company's segments include: Semiconductor, which supplies thermal processing equipment, including solder reflow ovens, diffusion furnaces, and customer high-temp belt furnaces for use by semiconductor and electronics assembly manufacturers; Silicon Carbide/Light-Emitting Diodes, which produces substrate consumables and machinery for lapping (fine abrading) and polishing of materials, such as silicon wafers and sapphire wafers; and Automation, which supplies semiconductor and solar automation with in-house design and manufacturing capabilities and provides single wafer transfer tools as well as batch transfer tools and stocker options.

Champions Oncology is engaged in the development and sale of technology solutions and products to personalize the development and use of oncology drugs. The company's TumorGraft Technology Platform is an approach to personalizing cancer care. The company provides solutions for two consumer groups: Translational Oncology Solutions, which provides a technology platform to pharmaceutical and biotechnology companies using proprietary TumorGraft studies; and Personalized Oncology Solutions, which assists physicians in developing personalized treatment options for their cancer patients through tumor specific data obtained from drug panels and related personalized oncology services.

Universal Electronics develops control and sensor technology solutions and manufactures a line of pre-programmed and universal remote control products, audio-video accessories, and intelligent wireless security and smart home products. The company provides subscription broadcasting providers with its universal remote control devices and integrated circuits, on which its software and device code libraries are embedded. The company also sells integrated circuits, on which its software and device control code libraries are embedded, and licenses its device control database to original equipment manufacturers that manufacture televisions, digital audio and video players, streamer boxes, among others.