shares of wheels up lost more than a quarter of their value after the jetchartering service warned of substantial doubt about its ability to continue even after raising fresh cash from shareholder delta air lines the stock dropped more than 28 to 172 in morning trading so far this year the stock is down about 83 the company earlier wednesday postponed its quarterly earnings release because it is actively involved in discussions around strategic business partnerships wheels up also said delta had provided it with a shortterm capital infusion wheels up said it has also entered into a nonbinding letter of intent to sell its aircraftmanagement business to airshare but in a followup filing with the securities and exchange commission wheels up said its efforts to secure more funding might not be enough and that there is substantial doubt about its ability to continue as a going concern for any meaningful period of time demand for private flying ballooned during the pandemic as health concerns spurred travelers to shell out for their own jets this year industry executives have warned of slowing demand as travel trends normalize write to will feuer at willfeuerwsjcom