https://www.reuters.com/article/us-telecom-italia-elliott-stake-report/telecom-italia-shares-jump-as-elliot-said-to-counter-vivendi-influence-idUSKCN1GI0ZI >Shares in Telecom Italia (TIM) rose more than 6 percent on Tuesday after reports activist investor Elliott Management had bought a stake in the phone group to challenge the way top investor Vivendi is running the company.