PWE

Penn West Petroleum Ltd (obsidian Energy Ltd)

A Calgary-based oil and natural gas producer exploring the Western Canada Sedimentary Basin, pulling light oil, heavy oil, and gas from core Alberta fields like Peace River, Willesden Green, and Viking. It began in 1979 as Penn West Petroleum, and in 2017 rebranded to Obsidian Energy as a fresh start after a troubled decade. The name came from obsidian, the volcanic glass whose dark sheen resembles crude oil and whose strength, leadership said, mirrors a company "sharpened and honed" by restructuring.