Xos, Inc. (NASDAQ: XOS), a leading technology company that provides fleet services, software solutions, and manufactures Class 5 through Class 8 battery-electric commercial vehicles, today announced it has signed an endorsement of a Global Memorandum of Understanding (“MOU”) created by CALSTART, a national clean transportation non-profit consortium, advocating for the acceleration of zero-emission medium- and heavy-duty vehicles (“ZE-MHDVs”).