Giving equity as employee equity share is a common practice among startups, and however, this is not a typical arrangement for more grown companies. One of the main reasons this is so unpopular with larger companies is because if employees leave, they automatically have an uncertain percentage of company ownership relative to what was agreed upon at the start--this can be disruptive and even dangerous to their new business partner. In addition, larger companies have many different part-time positions that rotate people in and out regularly, making it difficult to assign individual allocation percentages from within those positions comparatively to everyone else in the company.