It's interesting... There are companies on that list that have their home office in states where transgender protections are written into law but they did not report they offer transgender protections.
Looking just at the first page of the alphabetical list, I found six (6) companies like that, two (2) of them in Illinois where TG protections went into law in 2006. That just shows you how effective these laws really are. If they are not enforced, they are pretty much useless.