An Employee Stock Option (ESO) is the opportunity for an employee to get options to purchase stocks in the employer’s company, as part of a compensation, reward or remuneration. They are entitled the stocks for a fixed price – known as the strike price or grant price - which is decided when the options are granted to the employee. ESOs typically have a vesting period and an expiry date. But what do the employees that get stock options need to take care of and remember? Let’s discuss in this article.