Gnu, spinoffs don't work that way, you own 100% of a stock unit, the split off takes something away, so you now own a portion of the original company and a portion of the new company. Nothing really happens with your money. You need to figure out your cost basis in both company shares ( I suppose the company helps you out with that).
There is some concern that new shareholders could get favorable treatment but that probably will have to be done with warrants or some conversion provision for debt issuance provided from these same shareholders. All in all day one all shareholders should be treated the same.