I don't think they will "flip". They might start endorsing Democrats but the Democrats as a whole are akin to the British Tory party (right wing and getting righter) despite it's SocDem and Progressive elements. However, corporations are not a monolith (Siemens Gamesa, who makes windfarms, are going to have different goals than say, Saudi Aramco) and so now, companies like, say, Palatir, who use online data and surveillance data to hunt down "undesirables" will throw money at Trump while companies that rely on outside or worldwide trade may "filp" to the democrats, albeit more right wing candidates, or if they really are scared, might look for a candidate in the Libertarian Party.