GPS Receiver Manufacturers, System Integrators, Equipment Suppliers, and Service Providers
This listing is provided by the Canadian Space Geodesy Forum and the University of New Brunswick. by way of Richard B. Langley of Uni of Brunswick.

AACE Industries
Manufacturers of precision GPS and GLONASS receivers, temperature-stabalized antennas, and other equipment.

Aalto Technologies
Providers of GPS-based fleet management services. [...]