What you are talking about is no dilutional where if they split, you are not diluted and your options do not get diluted, so instead of the 4 you agreed to you get the equivalent after the split. Most contracts are dilutional, where you get 4 regardless of splits, I have never seen a contract (in my dealings) that has been non-dilutional in original form, I have always had to add non-dilutional clauses to my contracts because I have had my ownership eroded through this very mechanism.