I doubt there would be room in an Ultrabook for any extra equipment. Some companies have tracking mechanisms at the BIOS level, not sure about Ultrabooks. Dell has it for laptops, perhaps they have it for their 13" Ultrabook.
There are numerous software solutions, though:http://www.brighthub.com/computing/hardware/articles/70954.aspx
Keep it near/with you at all times. I carry on my person an iPad, iPhone, 17.3 inch laptop and a 14" laptop just about all times. Dilligence has kept them from walking away.
Keep the serial number info on you and report it stolen ASAP if it dissapears.