Spanish oil-and-gas major Repsol SA (<a href="https://www.bolsasymercados.es/bme-exchange/es/Mercados-y-Cotizaciones/Acciones/Mercado-Continuo/Ficha/Repsol-ES0173516115" target="_blank">BME:REP</a>) has reached an agreement to acquire a 40% stake in Valencia-based integrated biomethane promoter Genia Bioenergy.