2lementry quietly acquired by Amazon in May.
PTC acquired Thingworks for about $112m with revenue of about $10m
in 2013
PTC also added Axeda for about $170m in 2014.
Axeda should add about $25m in revenue.
Only smallish company listed in IoT is Logmein
with Xively.
See LOGM price chart since 2013 with their expansion in the IoT.