No it isn’t, vendor prefixes are sort of an anachronism. Bit 41 - bit 1 of the first octet is reserved for local (random) use. That and the group bit (40) set to 0 means the second digit of the human readable MAC is 2, 6, A or E, but that’s it.
So you can't use it to track devices between multiple SSIDs including when scanning for networks, but you can use it to persistently identify a device when connected to the same network.