Well...if there isn't a list, let's start one...
I was trying to figure this out when I found this thread. I did some research on a few hotels in Warren, MI, near the GM Tech Center. Here's what I found using the Macomb County GIS system to look at public tax records:
The owner of the CY in Warren is listed as:
MARRIOTT CORPORATION
MARRIOTT BUSINESS SERVICES
P. O. BOX 579
LOUISVILLE, TN 37777-0579
I would say that this is a company-owned location.
The owner of the TPS in Warren is listed as:
WARREN HOTEL SUITES INC
24725 GREENFIELD
SOUTHFIELD, MI 48075
This is NOT a company-owned location.
This kind of data isn't always readily available...but if you REALLY want to know, it's the best way to find out (without just asking at the desk.)