What you REALLY want to know are things that you're not likely to find out in your offer:
* How does your share allocation compare to your peers, superiors and subordinates? In other words, are you getting an equitable share in the company for your position?
* What is the board's strategy for maintaining employee ownership in the face of dilution? Regardless of what you start with, it can be made irrelevant as the number of outstanding shares goes up in future financing rounds. It is natural to expect your ownership share to go down over time as the company grows, but additional share grants can mitigate that effect.
* How does your share allocation compare to your peers, superiors and subordinates? In other words, are you getting an equitable share in the company for your position?
* What is the board's strategy for maintaining employee ownership in the face of dilution? Regardless of what you start with, it can be made irrelevant as the number of outstanding shares goes up in future financing rounds. It is natural to expect your ownership share to go down over time as the company grows, but additional share grants can mitigate that effect.