The oligarchs sold a 3% stake in Rusal which could complicate the IPO of Deripaska's En+ in December.
The deal was conducted with a discount of 7.5% from the market price of these securities.
Strengthening of the ruble by 7%, the risks of volatility in aluminum prices and changes in the electricity and capacity market: these are the objective risks for Deripaska's companies.
Chinese trader CEFC can buy a 5% stake in En+ during the company's IPO.
Mikhail Prokhorov may abandon the ranks of the company's shareholders by November.
On the eve of the London IPO, En + investors were reminded how the law had been violated in the redemption of shares of Irkutskenergo.
In May, En + can initiate a public offering of a 20% stake for about $2 billion.
Oleg Deripaska's UC Rusal may face a conflict around shares: according to Bloomberg, the company intends to issue new shares and place 20% of shares on the stock exchange in London. But minority shareholders, including Viktor Vekselberg, Mikhail Prokhorov and Glencore, are threatening to block it.
Oleg Deripaska filed a lawsuit against the Montenegrin authorities on the case of investments in two local businesses. The businessman demands hundreds of millions of euros in compensation.