First and foremost, suppliers. We will be seeing many bankruptcies in that space. Some are losing money in the billion dollar range, and I don't mean lost profits.
Generators and utilities whose entire structure has been upended by all of the closed businesses and all of the houses in use. The regulators are going to have a difficult time dealing with many aspects of this.
This is ironic, the low demand makes for low prices, which kills supply to the point that its lower than current demand.
Energy is interesting because the supply is so centralized and you can’t just pop up a power plant randomly to compete.