Brian makes a good point about the type of talent #3 and #4 turn out to be.
The typical equity pool for a VC backed startup is 20% of the total stock at each around. I will assume that the founders stock has already been distributed, so that's out of the picture.
Dividing up that 20% equity pool is usually based on the position. One of the models I have seen looks like:
- CEO: 4%
- VP Level: 1.5%
- Director Level: 0.8%
- Senior Technical Staff: 0.7%
- Technical Staff: 0.5%
- Staff: 0.1%
The numbers above would be how much of the company those positions own. For example, each VP would own 1.5% of the company. As you can image, it gets a little tricky trying to balance it all out given the number of employees you have.