US retail electricity and power generation company Vistra Corp (<a href="https://www.nyse.com/quote/XNYS:VST" target="_blank">NYSE:VST</a>) has agreed to acquire the remaining 15% stake in its subsidiary that houses its zero-carbon nuclear, energy storage and solar generation assets as well as its retail business, for an undiscounted purchase price of USD 3.248 billion (EUR 2.920bn).