Chelsea co-owner Mark Walter is reportedly looking to offload his share in the club.Walter boasts a 12.8 per cent in BlueCo, who are the owners of the Premier League heavyweights.Walter could soon land a hefty boost to his bank balanceGettyHowever, according to the Wall Street Journal, the 66-year-old is seeking a way out.News of Walter’s interest in selling his Chelsea stake comes shortly after he sold NBA powerhouse Los Angeles Lakers for an eye-watering $12.5billion [£9.2bn] to Joshua Kushner and Bob Iger.The staggering sum represents the highest price that has ever been paid for a sports team.What made Walter’s sale of the Lakers all the more intriguing was the fact he purchased the franchise only a year earlier for a then-record $10bn [£7.4bn].Why is Mark Walter under investigation by US prosecutors?Walter’s withdrawal from the Lakers and potentially Chelsea comes amid an investigation from the U.S. Attorney’s Office into potential financial misconduct at two of his insurance companies as well as Guggenheim Partners, which he leads.The 66-year-old’s mobile phone and computer were seized by federal agents aboard a private plane at Midway International Airport in Chicago last September as part of a court-authorised search warrant.“Mark Walter and TWG have always acted in good faith, and those who have done business with Mark know him as honest and straightforward,” TWG Global, Walter’s conglomerate, said in a previous statement.“We are cooperating with authorities, and we are confident these matters will be resolved favorably.”No individuals have been criminally charged as part of the FBI’s investigation into the financial improprieties.Walter is listed as a director on Chelsea’s board but his role does not entail day-to-day operations.Todd Boehly is listed as Chelsea’s chairmanPAWhen did BlueCo take over Chelsea?BlueCo purchased Chelsea from Roman Abramovich in May 2022 for £4.25bn.Abramovich was forced to sell after the UK government placed sanctions on him following Russia’s invasion of Ukraine.As a result of the sanctions, Abramovich saw none of the proceeds from the sale.BlueCo have since sunk billions into the club, especially when it comes to transfers.The latest example of Chelsea breaking the bank for a new player was for Morgan Rogers, who moved from Aston Villa earlier this summer for £117m.Despite the hefty spending, Chelsea only have two trophies to show for their troubles: the Club World Cup and the Conference League.Additionally, the Blues have finished inside the top four just once in the last four seasons.