Applied Materials Inc. (AMAT)

Applied Materials is the world's largest supplier of semiconductor manufacturing equipment, providing materials engineering solutions to help make nearly every chip in the world. The firm's systems are used in nearly every major process step with the exception of lithography. Key tools include those for chemical and physical vapor deposition, etching, chemical mechanical polishing, wafer- and reticle-inspection, critical dimension measurement, and defect-inspection scanning electron microscopes.

eHealth Inc. (EHTH)

EHealth offers a private health insurance exchange where individuals and small businesses can compare health insurance products from leading insurers. Users can purchase the insurance online. The exchange includes Medicare options, and seniors can enroll in those plans online or via phone. The company primarily generates revenue through commissions it receives from health insurance carriers. EHealth has relationships with the leading health insurance carriers in the United States and offers thousands of plans online. All of the company's revenue is from the United States.

Exponent Inc. (EXPO)

Exponent Inc is a United States-based company that provides engineering and scientific consulting services on a project-by-project basis. The company's consultant team is composed of scientists, physicians, engineers, as well as business and regulatory consultants. The company currently operates through two segments. The engineering and other scientific segments, which accounts for the majority of revenue, provides servicing encompassing biomechanics, biomedical engineering, buildings and structures, civil engineering, construction consulting, etc. The environmental and health segment covers chemical regulation and food safety, ecological and biological sciences, environmental and earth sciences and others. The company generates almost all its revenue from America.

Qorvo Inc. (QRVO)

Qorvo represents the combined entity of RF Micro Devices and TriQuint Semiconductor, which merged with one another in January 2015. The company specializes in radio frequency filters, power amplifiers, and front-end modules used in many of the world’s most advanced smartphones. Qorvo also has a suite of products sold into a variety of nonsmartphone end markets, such as wireless base stations, cable TV and networking equipment, and infrastructure and military applications.

Skyworks Solutions Inc. (SWKS)

Skyworks Solutions produces semiconductors for wireless handsets and other devices that are used to enable wireless connectivity. Its main products include power amplifiers, filters, switches, and integrated front-end modules that support wireless transmissions. Skyworks' customers are mostly large smartphone manufacturers, but the firm also has a growing presence in nonhandset applications such as wireless routers, medical devices, and automobiles.