FermÃÂn Aldeguer Mengual (born 5 April 2005) is a Spanish Grand Prix motorcycle racer who is competing in MotoGP for BK8 Gresini Racing MotoGP in 2025. He became the second youngest rider (20 years and 183 days old) to win a MotoGP race to Marc Márquez after winning the 2025 Indonesian Grand Prix, and joins fellow Spanish riders Marc Márquez, Dani Pedrosa and Jorge Lorenzo in winning a race in the premier class under the age of 21 in the MotoGP era.
Aldeguer was born in Murcia, same area where the fellow MotoGP rider Pedro Acosta is from.
Aldeguer is managed by former Grand Prix motorcycle racer Héctor Faubel.
In 2021, Aldeguer made several replacement appearances for the injured and suspended Yari Montella in the Moto2 category while competing full time in MotoE with the Aspar Team. He eventually replaced Montella for the last four rounds of the Moto2 season after the MotoE campaign ended in Misano. He ended the 2021 Moto2 campaign with two point scoring finishes in eight races, a 12th place in Mugello, and a 7th place in Aragon. At the end of the 2021 season, Aldeguer and the Speed Up team came to a new, three-year contract agreement.
On 28 August 2024, it was announced that he would sign a two-year contract with Gresini Racing moving up to MotoGP for the 2025 season. Aldeguer saw a consistent curve of improvement in the early races of 2025, as he took his first sprint and main race podiums at the French Grand Prix. A second podium finish came at the Red Bull Ring, with a late charge to second place. Aldeguer won his first race in the premier class after newly crowned world champion Marc Márquez and polesitter Marco Bezzecchi collided on opening lap at the Indonesian Grand Prix and became second youngest rider to win a MotoGP race after Márquez himself.
() (Races in bold indicate pole position; races in italics indicate fastest lap)
() (Races in bold indicate pole position) (Races in italics indicate fastest lap)
() (Races in bold indicate pole position, races in italics indicate fastest lap)
() (Races in bold indicate pole position; races in italics indicate fastest lap)
<sup></sup> Half points awarded as less than half of the race distance (but at least three full laps) was completed.<br />