When Boris Yeltsin became president, he appointed Aven with the task of making the ruble convertible and finding a solution to foreign debt.

After leaving the government in December 1992, Aven became an adviser to the president of JSC "LogoVAZ" Boris Berezovsky and remained in this post until the end of 1993.

[17] In 2013, Aven joined the Board of LetterOne Group, an international investment business founded by Mikhail Fridman and focused on the telecoms, technology and energy sectors.

LetterOne acquired assets from German utility business E. ON in October 2015, in a deal worth $1.6bn, that saw the Luxembourg-based group gain Norwegian oil and gas resources.

[18] In the following month, LetterOne also announced their intention to deal with Brazilian telecoms company Oi SA, and boost their presence in the mobile phone sector there.

[20] In his review of the book, John Lloyd of the Financial Times called it "an illuminating study of the reformers who sought to revive Russia's post-Soviet economy.

For it Aven interviewed many people who were familiar with Berezovsky, including Anatoly Chubais, Valentin Yumashev, Aleksandr Voloshin, Mikhail Fridman, Yuri Shefler and Demian Kudryavtsev.

In the book Aven says that he has known Berezovsky since 1978 and was quite close to him: "It was Fridman and I who happened to be by Boris's bed after his attempted assassination in 1994, and it was our yacht that he chose to go after being discharged from hospital".

[27] The canvas had been part of the "Icônes de l'Art Russe" exhibition of the late Morozov brothers' collection of artworks at the Fondation Louis Vuitton in Paris.

[32] In April 2024, an EU court, citing a lack of evidence, annulled sanctions on Aven and his business partner Mikhail Fridman.

"[33][34] In May 2024, the NCA asked a UK court to permanently seize £1.1 million in funds held by Aven, describing them as "proceeds of crime.

[50] In March 2022, after lawyers for Fusion GPS asked a federal judge to dismiss the case, the plaintiffs agreed to drop the lawsuit.

The judge stated that Steele's dossier also inaccurately claimed that Aven and Fridman provided foreign policy advice to Putin.

Its priorities are "support for children's healthcare, cultural exchange projects between Latvia and Russia, as well as scholarships and grants in the field of science.

[71] The award was given to Aven in recognition of his many achievements in building understanding between Russians and Americans during his career, and for his role as co-founder of the Alfa Fellowship Program,[72] which gives emerging young leaders from around the world the opportunity to gain professional experience in the private sector, government, and non-profit community, creating a new generation of American experts on Russia.