Spanish renewables developer-operator Grenergy Renovables SA (<a href="https://www.bolsasymercados.es/bme-exchange/es/Mercados-y-Cotizaciones/Acciones/Mercado-Continuo/Ficha/Grenergy-Renovables-ES0105079000" target="_blank">BME:GRE</a>) has launched a new share buyback programme for a maximum of EUR 40 million (USD 41.2m) to reward its shareholders, the company said on Tuesday.