President and CEO, PG&E, 57
Williams made history when she joined the list last year as the first Latina to run a Fortune 500 company. Since then, PG&E’s finances have been scorched by the California wildfires, sending the stock tumbling by about a third. In June the company took a $2.5 billion charge against earnings for potential fire-related liabilities and in the future may face other fines related to the disaster. On a brighter note: PG&E last year met California’s 2020 renewable energy goals three years ahead of schedule.