I am not really familiar with restricted share units.  Do these shares mean they are awarded as a form of bonus where they incur no actual cost to purchase them?  They just come due on a pre determined schedule basically for free?

https://www.schwab.com/public/eac/resources/articles/rsu_facts.html

Basic Concepts

Restricted stock units are a way an employer can grant company shares to employees. The grant is "restricted" because it is subject to a vesting schedule, which can be based on length of employment or on performance goals, and because it is governed by other limits on transfers or sales that your company can impose.