A lot of longtime Uber employees may be headed for the exits soon. Until recently, Uber only gave employees 90 days to exercise stock options after they quit. They are changing that limit to up to several years, depending on position and length of time with the company.
The reason is that, unlike most Silicon Valley companies, Uber severely restricts unapproved secondary sales of their stock. They also don’t allow employees to get a loan to purchase their options using the stock as collateral.