I think you might be better off to pick a specific type of business instead of a specific company. For exmple, are service based ones exploding? Or is it dev boards? or some other kind of open source system.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.