Figuring out the split after the fact will only cause dissent among the 4 involved and any other employees. Since it was not decided prior to the results, I would give each 75 points.
Determining point division ahead of time could be rationalized to any of a number of ways to divide the 300 points:
Highest getting all of it
Even spit between all
Employees above 50% splitting 150 points equally and the balance distributed based on how far above half of goal (33/110,30/110,28/110,19/110)
Below goal getting none and splitting the points among the others 3 based on how far over the goal they were (6/10, 3/10, 1/10)
Each choice would put different pressures on the company/employee and the owner(s) would have to decide how they wanted their company to present to the world.