Investment company Ardian has acquired an additional 10% equity stake in Repsol's Compañía Logística de Hidrocarburos (CLH Group), the Spanish oil products and storage company, in a transaction worth €325m.
The latest investment will increase Ardian's stake in the company to 25%.
Ardian executive committee member and infrastructure head Mathias Burghardt said: "This investment will provide certainty and stability to CLH, a critical infrastructure asset in Spain.
"Ardian Infrastructure will continue to support the company's efforts in providing its clients with the most efficient and reliable logistics services in Europe while leading the industry in further innovation."
According to Repsol, the sale is part of a programme to fine tune company's portfolio through selective divestments of non-strategic assets that were launched following the acquisition of Canadian oil company Talisman Energy in December 2014.
After acquiring Talisman Energy for €6.64bn, Repsol increased its presence in OECD countries and raised its output by 76% to 680,000 barrels of oil equivalent per day.
Repsol stated that the sale of CLH will generate a capital gain of €300m for the company.
Prior to selecting the winning bid, the company involved almost 150 potential investors and carried out an extensive process.
Earlier in 2011, Ardian acquired a 10% interest in CLH and an additional 5% stake in 2013.
With over 4,000km of pipeline and seven million m³ of storage capacity in Spain, CLH owns and operates the largest Spanish oil products and storage network.
Recently CLH acquired the government pipeline and storage system (GPSS), the oil distribution network in the UK, which also has 16 storage facilities with over one million m³ combined storage capacity.