It wasn’t clear whether the sanctions on Potanin would extend to Nornickel, which is one of the world’s largest producers of nickel, palladium and copper. Potanin is the company’s top executive and owns over 30% through his investment company Interros. Palladium rose as much as 7.7% on the news, while nickel prices jumped 9.2% before paring gains.

Since Russia’s invasion of Ukraine, Potanin has bought up some of Russia’s key privately owned banks, including buying Rosbank PJSC from Societe Generale SA. He also bought a stake in Tinkoff Bank from founder Oleg Tinkov, who said he was forced to sell after criticizing the war.

In a press release, the UK’s Foreign, Commonwealth & Development Office said that Potanin “continues to amass wealth as he supports Putin’s regime, acquiring Rosbank, and shares in Tinkoff Bank in the period since Russia’s invasion of Ukraine.”

In its updated sanctions list, the UK said Potanin “is obtaining a benefit from or supporting the Government of Russia by owning or controlling Rosbank.” It made no mention of Nornickel.

Read: Richest Russian Strikes Deal as Sanctions Snare Other Oligarchs

UK government sanctions on individuals automatically extend to any company they own or control.

That includes companies where an individual owns more than 50% of the shares, but also those where they have the right to appoint a majority of the board of directors, and those where “it is reasonable to expect that the person would be able to ensure the affairs of the entity are conducted in accordance with the person’s wishes,” according to UK government guidance.

Nornickel’s press service declined to comment. Speaking at a conference in Moscow on Wednesday, vice-president Vladimir Zhukov said the UK sanctions on Potanin do not apply to Nornickel, without saying on what basis he was making that claim. The company is studying how the development might affect its business, he said.

The UK is not a significant market for the company, which sells most of its products in the EU, the US and China. Still, it is the home of the London Metal Exchange, which controls a network of warehouses around the world and where global metals prices are set.

The LME said it is examining what implication the sanctions on Potanin will have for its market.

“We are looking into the detail of the sanctions and what it may mean for the LME, its participants, and Norilsk brands,” the exchange said in a statement.

The sanctions will also bring to a halt the massive divorce claim from Potanin’s ex-wife in London. Just this week the UK’s Supreme Court agreed to hear an appeal on whether the country is the right venue for the bitter legal fight — a case he has been trying to stop for several years. The divorce claim could exceed $7 billion.

The UK also sanctioned coal mining company JSC Kolmar Group and its president, Anna Tsivileva.