The real scandal involves billions in funds from the IMF and US in aid that has gone missing.
Burisma (Ukraine’s largest oil and gas provider) has been the subject of many recent news articles because of its scandalous close-knit ties with President Obama’s Vice President Biden and Secretary of State Kerry. (Yes, Kerry is involved here too)
A controlling shareholder of Burisma is believed to be held by an entity called Privat Group:
The Privat Group, or PrivatBank Group (Ukrainian: Група “Приват”, Grupa “Privat”) is a global business group, based in Ukraine. Privat Group controls thousands of companies of virtually every industry in Ukraine, the European Union, Georgia, Ghana, Russia, the United States and other countries. Steel, oil & gas, chemical and energy are sectors of the group’s prime influence and expertise. None of the group’s capital is publicly traded on any stock exchange.