In the Premier League, any transfer between two clubs with shared ownership is subject to a mandatory "fair market value assessment" to ensure the fee isn't artificially inflated. This means that even if Al-Hilal were to pay a record sum for Isak, the amount Newcastle could officially claim as profit under the league’s Profit and Sustainability Rules (PSR) might be significantly reduced, especially if regulators deem the transaction to exceed reasonable market value.
UEFA’s regulations are even more unyielding. For clubs involved in European competitions, such as the Champions League, deals between entities under common ownership are considered to generate zero profit in Financial Fair Play calculations. In other words, a blockbuster deal with Al-Hilal would have no positive impact on Newcastle’s FFP status.