Frequency Electronics, Inc. (FEI) is a world leader in the design, development, and manufacture of high-precision timing, frequency generation, and RF control products for space and terrestrial applications. The company operates through two primary business segments: FEI-NY and FEI-Zyfer. The FEI-NY segment provides precision time and frequency control products used in communication satellites, terrestrial cellular telephone stations, and other military systems. The FEI-Zyfer segment specializes in global positioning system (GPS) technologies and subsystems for secure government and commercial communications. FEI's products are critical components in satellite payloads, C4ISR systems, electronic warfare, missiles, UAVs, aircraft, and secure communication networks. Over 94% of the company's sales are made under contracts to the U.S. Government or subcontracts for U.S. Government end-use, with major defense contractors like Northrop Grumman and Lockheed Martin serving as key customers.

Research as of 20 Jun 2026