The Gross Margin of Petro River Oil Corp (PTRC) is 22.22%.
Gross Margin represents the percentage of revenue that exceeds the cost of goods sold. It reflects a company's efficiency in producing and selling its products.
| Date | Value |
|---|---|
| 2019-04-30 | 22.22% |
| 2018-04-30 | 22.22% |
| 2017-04-30 | -347.73% |
| 2016-04-30 | -121.02% |