Soft-ex
Developer of billing communication and UC analytics platform catering to digital service providers and UC-hosted voice providers. Acquired by WidePoint (AMEX: WYY) in 2014.
Cetek
Specializes in ceramic matrix composites and coatings. Acquired by Integrated Global Services in 2017.
Vicor
Manufactures power conversion components for various industries. IPO in 1986.
Solid State Instruments
Manufactures radiation detection and measurement equipment. Acquired by Kollmorgen in 1968.
Analog Devices
Designs and manufactures analog, mixed-signal, and DSP integrated circuits. IPO in 1969.