• Shell average ebitda margin for 2011-09-30 was 0%, a 0% decline from 2012-03-31.
• Shell average ebitda margin for 2012-03-31 was 0%, a 0% decline from 2012-06-30.
• Shell average ebitda margin for 2012-06-30 was 0%, a 0% decline from 2012-09-30.

Ebitda margin can be defined as earnings before interest, taxes, depreciation and amortization as a portion of total revenue.