Russian businessman Leonid Mikhelson has an estimated net worth of $23.8 billion as of July 2019. He currently serves as the Chairman and Chief Executive officer of Novatek, a Russia-based company.

Just recently, Leonid Mikhelson's net worth has significantly increased by almost four billion dollars in a single year due to the strong performance of petrochemical producer Sibur Holding, where he holds a very high stake together with businessman Gennady Timchenko.

He is First United Bank's largest shareholder. Owning 25% of the stake of Novatek, Leonid Mikhelson is considered as the largest shareholder in the company. He took over Novatek in 1987 which was then focused to building roads, industrial facilities and pipelines. After reorganizing the company, he started earning oil and gas production licenses.