Although Mingueza wasn't able to make an impact at Barcelona, the club managed to retain 50% of his transfer rights when they sold him to Celta Vigo, valid till the duration of his contract with the new club. It didn't take long for Mingueza to make an impact at Celta, and for a time, it appeared the Barcelona were going to earn a solid chunk of revenue as big clubs circled around the defender.
The Catalan club are at serious risk of losing their 50% stake in the future of Mika Marmol, with all signs pointing towards the defender leaving Las Palmas on a free transfer next summer. Marmol joined Las Palmas in 2023 after leaving Barça, signing a deal that runs until 2026. As part of that agreement, Las Palmas acquired 50% of the player's rights, while Barcelona smartly retained the remaining half.