(Reuters) -Hedge fund Third Point has built a large stake in Royal Dutch Shell and called on the oil major to split into multiple companies to increase its performance and market value. Billionaire investor Daniel Loeb's New York-based firm, which has successfully pushed for strategy changes at other companies, owns roughly $750 million in Shell, according to a person familiar with the matter. Shell's market value is nearly $190 billion. Shell, like other big oil companies, faces mounting pressure from investors and governments to de-carbonize its operations. It has shed fossil fuel businesses while increasing its stake in renewables.