[2] In November 2023, the New York Times reported as part of the Cyprus Confidential leak that accounts connected to him paid Hubert Seipel [de], a German author, to write a book about Putin.

[19][20] He received a loan from the United States Department of Energy to renovate and refurbish the manufacturing plants in Dearborn.

[22] In 2011 he sold a number of US assets in Ohio, Maryland and West Virginia to the Renco Group, owned by industrialist Ira Rennert.

[24][25] His company Severstal planned a multibillion-dollar project in joint venture with POSCO in eastern India.

[28] As he increased his stake to the largest single shareholder through his S-Group Travel,[29] TUI Travel under Michael Frenzel[30] expanded into Eastern Europe and Russia in 2008,[29][30] China and India in 2009,[30] and sold off its shipping interests, Hapag-Lloyd AG,[31] to the Albert Ballin Consortium in March 2009.

[37] In 2013, with partner Yuri Kovalchuk, Mordashov bought 50% of Tele2 Russia, the country's 4th largest mobile phone operator.

[43][44] In 2017 Mordashov announced plans to delist Nordgold[45] from the London Stock Exchange (LSE)[46] citing unfair valuation as the reason.

On 28 February 2022, in relation to the 2022 Russian invasion of Ukraine, the European Union blacklisted Mordashov and had all his assets frozen.

[59] The Pandora Papers were a collection of nearly 12 million leaked confidential financial records compiled by the International Consortium of Investigative Journalists.

Within those records are details of how a special unit known as "Cypriot" within accounting firm PricewaterhouseCoopers (PwC) helped Mordashov "build the offshore infrastructure of his business empire."

Through these shell companies, Mordashov expanded his presence in the logging, coal, and media industries inside Russia.

[60][61] In 2001, it was revealed in a St Petersburg divorce court that he was paying only $620 a month to support his ex-wife and son,[60] when she sued him for half of his pre-divorce property but lost the case and incurred large fees.

[61][65] In 2018–2019, for Kirill and Nikita the KN-holding company was created, to which Mordashov transferred his shares in Nordgold and TUI.