• Roku average pre-tax profit margin for 2016-09-30 was 0%, a 0% decline from 2016-12-31.
• Roku average pre-tax profit margin for 2016-12-31 was 0%, a 0% decline from 2017-03-31.
• Roku average pre-tax profit margin for 2017-03-31 was 0%, a 0% decline from 2017-06-30.

Pre-tax profit margin can be defined as earnings before taxes as a portion of total revenue.